Exam Details
| Subject | mechanical engineering | |
| Paper | paper 1 | |
| Exam / Course | ||
| Department | ||
| Organization | Uttarakhand Public Service Commission | |
| Position | assistant engineer | |
| Exam Date | 2013 | |
| City, State | uttarakhand, |
Question Paper
1. In High velocity forming, the forming speed is greater than:
3 m/s
5 m/s
8 m/s
15 m/s
2. Which control chart is used to measure variability of 'Variability with in the sample':
x chart
c chart
u chart
chart
3. If the demand for an item is doubled and the ordering cost is halved, the economic order quantity for the item will be
A half of the earlier quantity
Double of the earlier quantity
Increased by a factor of
Will remain unchanged
4. An industry produces 300 spark plugs in one shift of 8 hours. If standard time per piece is 1.5 minute, the productivity would
3/4
5/8
7/16
15/16
5. If is the number of constraints in a linear programming problem with two variables and and non-negativity constraints x y>0 The feasible region in the graphical solution will be surrounded
m lines
m+1 lines
m+2 lines
m+4 lines
6. Effect of stock out of a commodity
Loss of profit
Loss of customers
Loss of goodwill
All of the above
7. The annual demand for an item is 3200 parts. Unit cost is Rs. 6 and the inventory carrying charges are estimated as 25% per annum. If the cost of one procurement is Rs. 150, what will be the number of orders per year?
8. In queuing theory, the ratio of mean arrival rate and the mean service rate is termed
Work factor
Utilization factor
Slack constant
Production rate
9. If in graphical solution of linear programming problem, the objective function line is parallel to the line representing constraint equation, then the solution of problem
Infeasible solution
Unbound solution
Multiple optimum solution
None of the above
10. Low helix angle drills are used for drilling holes
Plastics
Copper
Cast steel
Carbon steel
11. In a queuing problem, if the arrivals are completely random then the probability distribution of number of arrivals in a given time follows:
Normal distribution
Poisson distribution
Binomial distribution
Exponential distribution
12. In ABC analysis of inventories, items usually constitute:
10
20
30
70
13. Increase in economic order quantity results
Increase in inventory carrying cost
Decrease in ordering cost
Decrease in total cost
Total cost first decreases and then increases
14. In ABC analysis items are classified in three categories namely and C in accordance with their:
Values
Number
Characteristics
Priorities
15. Control limits of a X chart are:
X ± 2alpha
X ± 3alpha
X ± 6alpha
16. Following is not a method of solving a transportation problem:
Northwest corner method
Least cost method
Vogel's approximation method
Dynamic method
17. If work station times are not same, the overall production rate of an assembly line is determined by the
Fastest station time
Slowest station time
Average of all station times
Average of slowest and fastest station times
18. Which one of the following is not the control chart for attributes:
p chart
c chart
R chart
x chart
19. At break even point:
Sales revenue total cost
Sales revenue total cost
Sales revenue total cost
None of the above
20. In operating characteristics curve, abscissa represents:
Number of defectives
Percentage defectives
Sample number
Probability of acceptance
21. For a vibrating system with viscous damping, the characteristics equation is given
M c x kx 0
If the roots of the characteristics equation are real and equal, the system
Over damped
Critically damped
Underdamped
Cannot be predicted
22. For isotropic materials, shear and elastic moduli are related to each other and to Poisson's ratio according
E G
E 2G
E G
E
23. A body is having a simple harmonic motion. Product of its frequency and time period is equal
Zero
One
Infinity
0.5
24. The shear stress at the centre of a circular shaft under torsion
Maximum
Minimum
Zero
Unpredictable
25. The resultant deflection of a beam under unsymmetrical bending
Parallel to the neutral axis
Perpendicular to the neutral axis
Parallel to the axis of symmetry
Perpendicular to the axis of symmetry
26. Euler's formula holds good for:
Short columns only
Long columns only
Both long and short columns
Weak columns
27. In a beam when shear force changes sign, the bending moment will
Zero
Maximum
Minimum
Infinity
28. The point of contraflexure occurs
Cantilever beams
Simply supported beams
Overhanging beams
Fixed beams
29. In thick cylinder, the radial stresses in the wall thickness:
is zero
negligible small
varies from the inner face to outer face
None of the above
30. A solid circular shaft is subjected to a maximum shear stress of 140MPa. Magnitude of maximum normal stress developed in the shaft
60 MPa
90 MPa
110 MPa
140 MPa
31. A hollow shaft has external and internal diameters of 10cm and 5cm respectively. Torsional section modulus of shaft
375 cm3
275 cm3
184 cm3
84 cm3
32. Two cars and move at 15m/s in the same direction. Car is 300m ahead of car If car accelerate at 6m/s2 while car continues to move with the same velocity, car will overtake car after:
7.5 s
10 s
12 s
15 s
33. Two balls are dropped from a common point after an interval of 1 second. If acceleration due to gravity is 10m/s2, separation distance 3 second after the release of the first ball will
5m
15m
25m
30m
34. A ball of 2kg drops vertically onto the floor with a velocity of 20m/s. It rebounds with an initial velocity of 10m/s, impulse acting on the ball during contact will
20
40
60
30
35. Kinetic energy of a solid cylinder of mass radius and angular velocity 2 . 2 2 . 2
mr2 w2
mr2 w2
mr2 w2
mr2 2
36. Impulse
Minimum momentum
Maximum momentum
Average momentum
Final momentum Initial momentum
37. A cable with uniformly distributed load per horizontal metre run will take the following shape:
Straight line
Parabola
Ellipse
Hyperbola
38. Mohr's circle may be used to determine following stress on an inclined plane:
Normal stress
Principal stress
Tangential stress
All of the above
39. State of plane stress at a point is described by
and xy
The normal stress on a plane inclined at 45° to the horizontal
(b)route 2 alpha
route 3 alpha
alpha
40. If load at the free end of the cantilever beam is gradually increased, failure will occur
In the middle of beam
At the fixed end
Anywhere on the span
None of the above
41. Kinematic pair constituted by cam and follower mechanism
Higher and open type
Lower and open type
Lower and closed type
Higher and closed type
42. If the diameter of a long column is reduced by 20 percent, the reduction in Euler buckling load in percentage is nearly:
49
59
43. Ultrasonic machining is best suited for:
Amorphous material
Brittle material
Non ferrous material
All of the above
44. A column of length is fixed at both the ends. The equivalent length of the column
2l
0.5 l
4 l
l
45. The Coriolis component of acceleration acts:
Along the sliding surface
Perpendicular to the sliding surface
At 45° to the sliding surface
None of the above
46. A slider on a link rotating with angular velocity have linear velocity The magnitude of Coriolis component of acceleration
2
vw/2
47. Coriolis component of acceleration exists whenever a point moves along a path that has:
Tangential acceleration
Centripetal acceleration
Linear motion
Rotational motion
48. When the applied force is less than the limiting frictional force, the body will:
Start moving
Remain at rest
Slide backward
Skid
49. Critical speed of a shaft depends
Diameter of disc
Length of shaft
Eccentricity
All of the above
50. Which of the following equilibrium equation should be satisfied by the joints in truss:
<img src='./qimages/3399-50.jpg'>
51. When the number of members in a truss is more than where is the number of joints, the frame is said to
Perfect truss
Imperfect truss
Deficient truss
Redundant truss
52. Turning a key into the lock is a case
Coplaner forces
Non-coplaner forces
Couple
Moment
53. When a wire is stretched to double its original length, the longitudinal strain produced in it
0.5
1.0
1.5
2.0
54. The electrolyte used in ECM process
Transformer oil
White spirit
Aqueous solution of common salt
None of the above
55. According to law of transmissibility of forces, effect of force acting on the body
Different at different points of the body
Minimum when it acts at centre of gravity of the body
Maximum when it acts at centre of gravity of the body
Same at every point in its line of action
56. Maximum shear stress in a Mohr's circle
Equal to the radius of Mohr's circle
Greater than the radius of Mohr's circle
route 2 times the radius of Mohr's circle
Could be any of the above
57. The ratio of the compressive critical load for a long column fixed at both the ends and a column with one end fixed and the other end being free
2 1
4 1
8 1
16 1
58. Elongation of bar under its own weight as compared to that when the bar is subjected to a direct axial load equal to its own weight will
The same
One fourth
A half
Double
59. A simply supported beam of length has uniformly distributed load kilogram acting per unit length. Bending moment at mid span l2 l2
wl2/8
wl2/4
wl2/2
None of the above
60. Uniformly distributed load act over per unit length of a cantilever beam of 3m length. If the shear force at the midpoint of beam is 6kN, what is the value of
2 kN/m
3 kN/m
4 kN/m
5 kN/m
61. Elastic constants G and K are related by the expression:- GK 2GK
E GK/2K+G
E G2K/2K+G
E 3GK/K+2G
E 9GK/3K G
62. A material has elastic modulus of 120 GPa and shear modulus of 50 GPa. Poisson's ratio for the material
0.1
0.2
0.3
0.33
63. A simply supported beam of length carries a point load at the midspan. Deflection in beam at the centre will Wl3Wl3
<img src='./qimages/3399-63.jpg'>
64. An object falls from the top of a tower. If comes down half the height in 2 seconds. Time taken by the object to reach the ground
2.8 s
3.2 s
4.0 s
4.5 s
65. A body moving with a velocity of 1 m/s has kinetic energy of 1.5 Joules. Mass of the body
0.75 kg
1.5 kg
3.0 kg
30 kg
66. A particle is projected at such an angle with the horizontal that the maximum height attained by the particle is one-fourth of the horizontal range. The angle of projection should
30°
45°
60°
75°
67. A bullet of 0.03 kg mass moving with a speed of 400 m/s penetrates 12cm into a block of wood. Force exerted by the wood block on the bullet
10 kN
20 kN
25 kN
30 kN
68. A block resting on an inclined plane begins to slide down the plane when the angle of inclination is gradually increased to 30°. The coefficient of friction between the block and the plane
0.50
0.578
0.72
0.866
69. The shearing area of a key of length breadth and depth is equal
b x d
l x d
l x b
l x d/2
70. The gear train usually employed in clocks is
Reverted gear train
Simple gear train
Sun and planet gear
differential gear
71. Universal joint is an example
Lower pair
Higher pair
Rolling pair
Sliding pair
72. The outer circle of spur gear is called
Pitch circle
Addendum circle
Dedendum circle
Base circle
73. Axes of a pair of spur gears are 200 mm apart. The gear ratio is 3:1 and number of teeth on pinion is 20. The module of the gear
4 mm
5 mm
8 mm
10 mm
74. In a flat belt drive, slip between the driver and belt is and that between belt and follower is 3%. If the pulley diameters are same, the velocity ratio of the drive
0.99
0.98
0.97
0.96
75. In case of a flywheel, maximum fluctuation in energy
Sum of maximum and minimum energies
Difference of maximum and minimum energies
Ratio of maximum and minimum energies
Ratio of minimum and maximum energies
76. Which pair of gears usually has higher frictional losses
Spur gears
Helical gears
Bevel gears
Worm and worm wheel
77. Average tensions on the tight side and slack side of a flat belt drive are 700 N and 400 N respectively. If linear velocity of the belt is the power transmitted will
1.5 kW
2.5 kW
2.8 kW
3.0 kW
78. Which one of the following in-line engine working on a four stroke cycle is completely balanced inherently?
2 cylinder engine
3 cylinder engine
4 cylinder engine
6 cylinder engine
79. If Hartnell governor uses a spring of greater stiffness, it will become:
Less sensitive
More sensitive
Remain unaffected
Isochronous
80. A disc clutch has n1 discs on driving shaft and n2 discs on driven shaft. Number of pairs of contact surfaces will
n1+ n2
n+1
n1+ n2-1
n1- n2
81. A spring controlled governor is found unstable. It may be made stable
Increasing spring stiffness
Decreasing spring stiffness
Increasing ball weight
Decreasing ball weight
82. Centre distance between two involute teeth gears of base radii R and r and pressure angle f is expressed
Sin
Cos
83. An engine running at 150 r.p.m. drives a shaft with belt arrangement. If diameter of engine pulley is 55 cm and shaft pulley 33 cm, find the speed of shaft:
100 r.p.m.
150 r.p.m.
200 r.p.m.
250 r.p.m.
84. In EDM process the tool and workpiece are separated
Electrolyte
A metal conductor
Dielectric fluid
None of the above
85. The equivalent bending moment under combined action of bending moment and torque is
<img src='./qimages/3399-85.jpg'>
86. Lewis equation in gears is used to find the:
Bending stress
Tensile stress
Centrifugal stress
Fatigue stress
87. A spring mass system shown in Figure is actuated by a load P 0.75 sin2t. If mass of the N block is 0.25 kg and stiffness of the spring is 4 N/M displacement of the block will
<img src='./qimages/3399-87.jpg'>
0.25
0.5
1.0
2.25
88. Dimensional formula ML2T represents:
Work
Force
Momentum
Power
89. A framed structure is said to be perfect if the following correlation is met between the number of joints and the number of the members
m 2j-3
m 3j-3
m 2j-1
m j-2 .
90. If ratio of excitation and natural frequency of vibration the transmissibility of .n vibration will be
0.5
1.0
1.5
2.0
91. Which one of the following is the preferred mode of transmission of power from one shaft to another when distance between the shafts is relatively small:
Gears
Belts
Ropes
Chains
92. If there is a gradual reduction in amplitude of vibration with time, the body is said to be
Free vibration
Forced vibration
Damped vibration
Un damped vibration
93. Porter governor is
Pendulum type governor
Dead weight type governor
Spring loaded governor
Inertia type governor
94. Sensitivity of an isochronous governor
Zero
One
Two
Infinity
95. Velocity of the belt for maximum power transmission by the belt and pulley arrangement
<img src='./qimages/3399-95.jpg'>
96. Which type of gears are used in connecting two coplaner and intersecting shafts?
Spur gear
Bevel gear
Helical gear
Worm and worm wheel
97. Which one of the following does not require a flywheel?
Steam engine
Engine driven press
CI engine
Gas turbine
98. If µ is the actual coefficient of friction in a belt moving in grooved pulley and groove angle is 2 . The virtual coefficient of friction will
<img src='./qimages/3399-98.jpg'>
99. Magnification factor for a single degree of freedom vibration is expressed
<img src='./qimages/3399-99.jpg'>
100. Primary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given
<img src='./qimages/3399-100.jpg'>
101. The mathematical technique for finding the best use of limited resources in an optimum manner is called:
Linear programming
Network analysis
Queueing theory
None of the above
102. For a speed reduction of 50 which gear arrangement will be used?
Spur gears
Bevel gears
Worm and worm wheel
Herringbone gears
103. For a 20° full depth involute gear teeth system, minimum number of teeth on a pinion
12
14
16
18
104. In a spring mass system if one spring of same stiffness is added in series, new frequency of vibration will
<img src='./qimages/3399-104.jpg'>
105. During the dwell period of the cam, the follower:
Remains at rest
Moves in a straight line
Moves with uniform speed
Does simple harmonic motion
106. Which one of the following correctively expresses the sensitivity of a governor? N 12
N1+N2/2N1N2
107. Which one of the following is electrically most conductive?
Copper
Silver
Aluminium
Gold
108. A relatively large plate of glass is subjected to a tensile stress of 40 MPa. If specific surface energy and Elastic modulus for glass are 0.3 J/m2 and 69 GPa, respectively, the maximum length of a surface crack that is possible without fracture
4.1 µ m
8.2 m
41 m
82 m
109. In the graphical method of linear programming problem the optimum solution would lie in the feasible polygon
Its one corner
Its center
The middle of any side
None of the above
110. Coordination number for FCC crystal structure
111. Atomic packing factor for unit cell of HCP crystal structure
0.68
0.52
0.74
0.82
112. Relationship between atomic radius and unit cell length for BCC crystal structure 4R
<img src='./qimages/3399-112.jpg'>
113. Which statement is not true in case of martensite?
Crystal structure is BCC
Transformation does not involve diffusion
Grains are plate like or needle like in appearance
It is a non-equilibrium phase
114. Which of the following statements is not true for diamond?
It is hardest known material
Diamond is non-metallic
It has high thermal conductivity
It has a very high electrical conductivity
115. Which one of the following has the highest value of specific stiffness?
Steel
Aluminium
Fibre glass
Carbon fibre composite
116. If a material expands freely due to heating, it will develop:
Thermal stresses
Tensile stresses
Compressive stresses
No stresses
117. Crystal lattice structure for mild steel
Single cubic
BCC
FCC
HCP
118. In tensile test of mild steel, necking will start:
At lower yield stress
At upper yield stress
At ultimate tensile stress
Just before fracture
119. Which medium is used for fastest cooling during quenching of steel?
Air
Oil
Water
Brine (salt water)
120. Compressive test performed on cast iron will have fracture occurring:
Along an oblique plane
Along the axis of load
Perpendicular to the axis of load
None of the above
121. Eutectoid steel consists
Fully pearlite
Fully Austenite
Ferrite Pearlite
Cementite Pearlite
122. Maximum principal strain theory of failure gives satisfactory result for:
Brittle materials only
Brittle as well as ductile materials
Ductile materials only
None of the above
123. Property of absorbing large amount of energy before fracture is known
Ductility
Toughness
Elasticity
Hardness
124. Which one of the following is weaker than hydrogen bonds?
Ionic bond
Vander Waals bond
Covalent bond
Metallic bond
125. Increase in ferrite phase in steel leads to increase
Strength
Hardness
Ductility
Brittleness
126. Austenite decomposes into ferrite and cementite at a temperature
727 °C
1148 °C
1495 °C
1539 °C
127. Slow plastic deformation in metals under a static load over a period of time
Fatigue
Endurance
Creep
Dislocation
128. Which of the following statements is not true for austenitic stainless steels?
They are hardened and strengthened by cold working
They are most corrosion resistant amongst stainless steels
Austenitic phase is extended to room temperature
They are magnetic in nature
129. The crystal structure of alpha iron
Body centered cubic
Face centered cubic
Hexagonal closed pack
Simple cubic
130. 18/8 stainless steel contains:
18% vanadium, chromium
18% chromium, nickel
18% tungsten, nickel
18% tungsten, chromium
131. Important property requirements for tool materials employed for high speed machining are:
Impact strength, melting point and hardness
Hot hardness, wear resistance and toughness
Melting point, toughness and shear strength
Shear strength, wear resistance and impact strength
132. Carbon content is highest in
Mild steel
Eutectoid steels
Hypoeutectoid steels
Hypereutectoid steels
133. Principal stress at a point in a plane stressed element are: s 500 N/m2 Normal stress on the plane inclined at 45° to x-axis will
0
500 N/m2
707 N/m2
1000 N/m2
134. If there are bad effects on strain hardening on a cold formed parts, the part must
Annealed
Tampered
Hardened
Normalised
135. Cold working is the process of deforming a metal plastically:
At recrystallization temperature
Below recrystallization temperature
Above recrystallization temperature
At annealing temperature
136. Which one of the following materials is most elastic?
Rubber
Steel
Aluminium
Glass
137. The temperature at which new stress free grains are formed in the metal is called:
Critical temperature
Eutectic temperature
Recrystallization temperature
Yield temperature
138. Toughness of steel is increased by adding:
Nickel
Sulphur
Chromium
Tungsten
139. In rolling process, the state of stress of the material undergoing deformation
Pure compression
Pure shear
Compression and shear
Tension and shear
140. Which one of the following is a point imperfection?
Vacancy
Frenkel defect
Schottky defect
All of the above
141. Which one of the following is closest to the purest form of iron?
Cast iron
Wrought iron
Grey cast iron
Mild steel
142. Addition of magnesium to cast iron increases its:
Hardness
Corrosion resistance
Creep resistance
Ductility
143. Which one of the following cannot be recycled?
Thermoplastics
Thermosets
Elastomers
Polymers
144. The most suitable manufacturing process for machining a turbine blade made of nimonic alloy
Milling and lapping
Electric discharge machining
Ultrasonic machining
Electro-chemical machining
145. Strain in direction at right angle to the direction of applied force is known
Lateral strain
Shear strain
Volumetric strain
None of the above
146. If the diameter of the hole is subjected to considerable variation, for locating in jigs and fixtures, the pressure type locator used
Conical locator
Diamond pin locator
Vee-locator
Cylindrical locator
147. Inter electrode gap in electro-chemical grinding is controlled by controlling the:
Pressure of electrolyte flow
Applied static load
Size of abrasives in the wheel
Texture of the workpiece
148. Pneumatic comparators work on following theory:
Newton's theory
Bernouli's theory
Pascal's theory
Legendre's theory
149. In machining processes, the percentage of heat generated in shear action is carried away by the chips to the extent
10
25
50
90
150. For a two dimensional stress system, the coordinates of the centre of Mohr circles are?
<img src='./qimages/3399-150.jpg'>
151. Which of the following is not a limitation for ECM process:
Very expensive
Sharp corners are difficult to produce
Surface finish is not good
Use of corrosive media as electrolyte makes it difficult to handle
152. The rate of work material removal in USM operation is proportional to the:
Volume of work material removed per impact
Number of particles making impact per cycle
Frequency of vibration
All of the above
153. Which of the following is not the assumption in Merchant's theory
Tool is perfectly sharp
Shear is occurring on a plane
Uncut chip thickness is constant
A continuous chip with built up edge is produced
154. Which technique is utilized to find percent idle time for man or machine?
Work sampling
Time study
Method study
ABC analysis
155. In Electro-chemical machining material removal is due
Corrosion
Erosion
Fusion
Ion displacement
156. In simplex method of linear programming the objective row of the matrix consists
Names of the variables
Coefficient of the objective function
Slack variables
None of the above
157. Which one of the following type of layout is used for the manufacturing of large air crafts?
Product layout
Process layout
Fixed position layout
Combination layout
158. Which of the following operations does not use a jig?
Turning
Drilling
Reaming
Tapping
159. The quality of machined surface depends
The material of the work piece
Rigidity of machine work-tool system
Cutting conditions
All of the above
160. The tool life of a cutting tool mainly depends
Cutting speed
Tool geometry
Ambient temperature
None of the above
161. Use of jigs and fixtures leads
High operational cost
High maintenance cost
High Initial cost
High manufacturing cost
162. For the two shafts connected in parallel, which of the following in each shaft is same?
Torque
Shear stress
Angle of twist
Torsional stiffness
163. Lee and Shaffer equation showing relationship between rake angle shear angle and friction angle is expressed
164. Metal in electro-chemical machining process is removed
Migration of ions towards the tool
Ionization and shearing
Chemical action and abrasion
Chemical etching
165. In an orthogonal cutting operation, the chip thickness and the uncut thickness are equal 0.45mm each. If the tool rake angle is the shear plane angle is
18°
30°
45°
60°
166. In a single point turning operation Taylor's exponent is 0.25. If the cutting speed is halved then the tool life will become:
Half
Two times
Eight times
Sixteen times
167. Standardization deals with the characteristics of product that include:
Its dimensions
Method of testing the product
Composition and properties of its material
All of the above
168. The critical speed of a shaft is affected by its:
1. Eccentricity
2. Span
3. Diameter Which of the above are correct?
1 and 2
1 and 3
2 and 3
2 and 3
169. Whirling speed of a shaft coincides with the natural frequency of its:
Longitudinal vibration
Transverse vibration
Torsional vibration
Coupled bending torsional vibration
170. Experts of same rank assemble for product development
Delphi technique
Brain storming
Direct expert comparison
Morphological analysis
171. A production line is said to be balanced, if at each station:
There is equal number of machine
There is equal number of operators
Waiting time for service is same
Operation time is same
172. When ordering cost is increased to 16 times, the EOQ will be increased
2 times
4 times
8 times
None of the above
173. Manufacturer's risk is the probability
Rejecting a good lot which otherwise would have been accepted
Defective batch being accepted which otherwise would have been rejected
Bad components in a lot
None of the above
174. Term "Value" in value engineering refers to
Total cost of the product
Selling price of the product
Utility of the product
Manufacturing cost of the product
175. Which one of the following shows the percentage of the area in normal distribution curve for ± 2 limits?
99.73
95.45
68.26
None of the above
176. In sampling, AQL stands for:
Average quality level
Acceptable quality level
Asymmetric quality level
Available quality level
177. There are rows and columns in a transportation problem. Degeneracy will occur if the number of allocations
Less than n
Greater than n
Equal to n
Less than n
178. C-chart is based on one of the following:
Number of defects per unit of a product
Fraction defectives in the sample
Number of defectives in the sample
None of the above
179. TQM is related
Quality control
Sampling
Control chart
Work study
180. The point of contraflexure occurs
Cantiliver beams
Overhanging beams
Simply supported beams
Fixed beams
3 m/s
5 m/s
8 m/s
15 m/s
2. Which control chart is used to measure variability of 'Variability with in the sample':
x chart
c chart
u chart
chart
3. If the demand for an item is doubled and the ordering cost is halved, the economic order quantity for the item will be
A half of the earlier quantity
Double of the earlier quantity
Increased by a factor of
Will remain unchanged
4. An industry produces 300 spark plugs in one shift of 8 hours. If standard time per piece is 1.5 minute, the productivity would
3/4
5/8
7/16
15/16
5. If is the number of constraints in a linear programming problem with two variables and and non-negativity constraints x y>0 The feasible region in the graphical solution will be surrounded
m lines
m+1 lines
m+2 lines
m+4 lines
6. Effect of stock out of a commodity
Loss of profit
Loss of customers
Loss of goodwill
All of the above
7. The annual demand for an item is 3200 parts. Unit cost is Rs. 6 and the inventory carrying charges are estimated as 25% per annum. If the cost of one procurement is Rs. 150, what will be the number of orders per year?
8. In queuing theory, the ratio of mean arrival rate and the mean service rate is termed
Work factor
Utilization factor
Slack constant
Production rate
9. If in graphical solution of linear programming problem, the objective function line is parallel to the line representing constraint equation, then the solution of problem
Infeasible solution
Unbound solution
Multiple optimum solution
None of the above
10. Low helix angle drills are used for drilling holes
Plastics
Copper
Cast steel
Carbon steel
11. In a queuing problem, if the arrivals are completely random then the probability distribution of number of arrivals in a given time follows:
Normal distribution
Poisson distribution
Binomial distribution
Exponential distribution
12. In ABC analysis of inventories, items usually constitute:
10
20
30
70
13. Increase in economic order quantity results
Increase in inventory carrying cost
Decrease in ordering cost
Decrease in total cost
Total cost first decreases and then increases
14. In ABC analysis items are classified in three categories namely and C in accordance with their:
Values
Number
Characteristics
Priorities
15. Control limits of a X chart are:
X ± 2alpha
X ± 3alpha
X ± 6alpha
16. Following is not a method of solving a transportation problem:
Northwest corner method
Least cost method
Vogel's approximation method
Dynamic method
17. If work station times are not same, the overall production rate of an assembly line is determined by the
Fastest station time
Slowest station time
Average of all station times
Average of slowest and fastest station times
18. Which one of the following is not the control chart for attributes:
p chart
c chart
R chart
x chart
19. At break even point:
Sales revenue total cost
Sales revenue total cost
Sales revenue total cost
None of the above
20. In operating characteristics curve, abscissa represents:
Number of defectives
Percentage defectives
Sample number
Probability of acceptance
21. For a vibrating system with viscous damping, the characteristics equation is given
M c x kx 0
If the roots of the characteristics equation are real and equal, the system
Over damped
Critically damped
Underdamped
Cannot be predicted
22. For isotropic materials, shear and elastic moduli are related to each other and to Poisson's ratio according
E G
E 2G
E G
E
23. A body is having a simple harmonic motion. Product of its frequency and time period is equal
Zero
One
Infinity
0.5
24. The shear stress at the centre of a circular shaft under torsion
Maximum
Minimum
Zero
Unpredictable
25. The resultant deflection of a beam under unsymmetrical bending
Parallel to the neutral axis
Perpendicular to the neutral axis
Parallel to the axis of symmetry
Perpendicular to the axis of symmetry
26. Euler's formula holds good for:
Short columns only
Long columns only
Both long and short columns
Weak columns
27. In a beam when shear force changes sign, the bending moment will
Zero
Maximum
Minimum
Infinity
28. The point of contraflexure occurs
Cantilever beams
Simply supported beams
Overhanging beams
Fixed beams
29. In thick cylinder, the radial stresses in the wall thickness:
is zero
negligible small
varies from the inner face to outer face
None of the above
30. A solid circular shaft is subjected to a maximum shear stress of 140MPa. Magnitude of maximum normal stress developed in the shaft
60 MPa
90 MPa
110 MPa
140 MPa
31. A hollow shaft has external and internal diameters of 10cm and 5cm respectively. Torsional section modulus of shaft
375 cm3
275 cm3
184 cm3
84 cm3
32. Two cars and move at 15m/s in the same direction. Car is 300m ahead of car If car accelerate at 6m/s2 while car continues to move with the same velocity, car will overtake car after:
7.5 s
10 s
12 s
15 s
33. Two balls are dropped from a common point after an interval of 1 second. If acceleration due to gravity is 10m/s2, separation distance 3 second after the release of the first ball will
5m
15m
25m
30m
34. A ball of 2kg drops vertically onto the floor with a velocity of 20m/s. It rebounds with an initial velocity of 10m/s, impulse acting on the ball during contact will
20
40
60
30
35. Kinetic energy of a solid cylinder of mass radius and angular velocity 2 . 2 2 . 2
mr2 w2
mr2 w2
mr2 w2
mr2 2
36. Impulse
Minimum momentum
Maximum momentum
Average momentum
Final momentum Initial momentum
37. A cable with uniformly distributed load per horizontal metre run will take the following shape:
Straight line
Parabola
Ellipse
Hyperbola
38. Mohr's circle may be used to determine following stress on an inclined plane:
Normal stress
Principal stress
Tangential stress
All of the above
39. State of plane stress at a point is described by
and xy
The normal stress on a plane inclined at 45° to the horizontal
(b)route 2 alpha
route 3 alpha
alpha
40. If load at the free end of the cantilever beam is gradually increased, failure will occur
In the middle of beam
At the fixed end
Anywhere on the span
None of the above
41. Kinematic pair constituted by cam and follower mechanism
Higher and open type
Lower and open type
Lower and closed type
Higher and closed type
42. If the diameter of a long column is reduced by 20 percent, the reduction in Euler buckling load in percentage is nearly:
49
59
43. Ultrasonic machining is best suited for:
Amorphous material
Brittle material
Non ferrous material
All of the above
44. A column of length is fixed at both the ends. The equivalent length of the column
2l
0.5 l
4 l
l
45. The Coriolis component of acceleration acts:
Along the sliding surface
Perpendicular to the sliding surface
At 45° to the sliding surface
None of the above
46. A slider on a link rotating with angular velocity have linear velocity The magnitude of Coriolis component of acceleration
2
vw/2
47. Coriolis component of acceleration exists whenever a point moves along a path that has:
Tangential acceleration
Centripetal acceleration
Linear motion
Rotational motion
48. When the applied force is less than the limiting frictional force, the body will:
Start moving
Remain at rest
Slide backward
Skid
49. Critical speed of a shaft depends
Diameter of disc
Length of shaft
Eccentricity
All of the above
50. Which of the following equilibrium equation should be satisfied by the joints in truss:
<img src='./qimages/3399-50.jpg'>
51. When the number of members in a truss is more than where is the number of joints, the frame is said to
Perfect truss
Imperfect truss
Deficient truss
Redundant truss
52. Turning a key into the lock is a case
Coplaner forces
Non-coplaner forces
Couple
Moment
53. When a wire is stretched to double its original length, the longitudinal strain produced in it
0.5
1.0
1.5
2.0
54. The electrolyte used in ECM process
Transformer oil
White spirit
Aqueous solution of common salt
None of the above
55. According to law of transmissibility of forces, effect of force acting on the body
Different at different points of the body
Minimum when it acts at centre of gravity of the body
Maximum when it acts at centre of gravity of the body
Same at every point in its line of action
56. Maximum shear stress in a Mohr's circle
Equal to the radius of Mohr's circle
Greater than the radius of Mohr's circle
route 2 times the radius of Mohr's circle
Could be any of the above
57. The ratio of the compressive critical load for a long column fixed at both the ends and a column with one end fixed and the other end being free
2 1
4 1
8 1
16 1
58. Elongation of bar under its own weight as compared to that when the bar is subjected to a direct axial load equal to its own weight will
The same
One fourth
A half
Double
59. A simply supported beam of length has uniformly distributed load kilogram acting per unit length. Bending moment at mid span l2 l2
wl2/8
wl2/4
wl2/2
None of the above
60. Uniformly distributed load act over per unit length of a cantilever beam of 3m length. If the shear force at the midpoint of beam is 6kN, what is the value of
2 kN/m
3 kN/m
4 kN/m
5 kN/m
61. Elastic constants G and K are related by the expression:- GK 2GK
E GK/2K+G
E G2K/2K+G
E 3GK/K+2G
E 9GK/3K G
62. A material has elastic modulus of 120 GPa and shear modulus of 50 GPa. Poisson's ratio for the material
0.1
0.2
0.3
0.33
63. A simply supported beam of length carries a point load at the midspan. Deflection in beam at the centre will Wl3Wl3
<img src='./qimages/3399-63.jpg'>
64. An object falls from the top of a tower. If comes down half the height in 2 seconds. Time taken by the object to reach the ground
2.8 s
3.2 s
4.0 s
4.5 s
65. A body moving with a velocity of 1 m/s has kinetic energy of 1.5 Joules. Mass of the body
0.75 kg
1.5 kg
3.0 kg
30 kg
66. A particle is projected at such an angle with the horizontal that the maximum height attained by the particle is one-fourth of the horizontal range. The angle of projection should
30°
45°
60°
75°
67. A bullet of 0.03 kg mass moving with a speed of 400 m/s penetrates 12cm into a block of wood. Force exerted by the wood block on the bullet
10 kN
20 kN
25 kN
30 kN
68. A block resting on an inclined plane begins to slide down the plane when the angle of inclination is gradually increased to 30°. The coefficient of friction between the block and the plane
0.50
0.578
0.72
0.866
69. The shearing area of a key of length breadth and depth is equal
b x d
l x d
l x b
l x d/2
70. The gear train usually employed in clocks is
Reverted gear train
Simple gear train
Sun and planet gear
differential gear
71. Universal joint is an example
Lower pair
Higher pair
Rolling pair
Sliding pair
72. The outer circle of spur gear is called
Pitch circle
Addendum circle
Dedendum circle
Base circle
73. Axes of a pair of spur gears are 200 mm apart. The gear ratio is 3:1 and number of teeth on pinion is 20. The module of the gear
4 mm
5 mm
8 mm
10 mm
74. In a flat belt drive, slip between the driver and belt is and that between belt and follower is 3%. If the pulley diameters are same, the velocity ratio of the drive
0.99
0.98
0.97
0.96
75. In case of a flywheel, maximum fluctuation in energy
Sum of maximum and minimum energies
Difference of maximum and minimum energies
Ratio of maximum and minimum energies
Ratio of minimum and maximum energies
76. Which pair of gears usually has higher frictional losses
Spur gears
Helical gears
Bevel gears
Worm and worm wheel
77. Average tensions on the tight side and slack side of a flat belt drive are 700 N and 400 N respectively. If linear velocity of the belt is the power transmitted will
1.5 kW
2.5 kW
2.8 kW
3.0 kW
78. Which one of the following in-line engine working on a four stroke cycle is completely balanced inherently?
2 cylinder engine
3 cylinder engine
4 cylinder engine
6 cylinder engine
79. If Hartnell governor uses a spring of greater stiffness, it will become:
Less sensitive
More sensitive
Remain unaffected
Isochronous
80. A disc clutch has n1 discs on driving shaft and n2 discs on driven shaft. Number of pairs of contact surfaces will
n1+ n2
n+1
n1+ n2-1
n1- n2
81. A spring controlled governor is found unstable. It may be made stable
Increasing spring stiffness
Decreasing spring stiffness
Increasing ball weight
Decreasing ball weight
82. Centre distance between two involute teeth gears of base radii R and r and pressure angle f is expressed
Sin
Cos
83. An engine running at 150 r.p.m. drives a shaft with belt arrangement. If diameter of engine pulley is 55 cm and shaft pulley 33 cm, find the speed of shaft:
100 r.p.m.
150 r.p.m.
200 r.p.m.
250 r.p.m.
84. In EDM process the tool and workpiece are separated
Electrolyte
A metal conductor
Dielectric fluid
None of the above
85. The equivalent bending moment under combined action of bending moment and torque is
<img src='./qimages/3399-85.jpg'>
86. Lewis equation in gears is used to find the:
Bending stress
Tensile stress
Centrifugal stress
Fatigue stress
87. A spring mass system shown in Figure is actuated by a load P 0.75 sin2t. If mass of the N block is 0.25 kg and stiffness of the spring is 4 N/M displacement of the block will
<img src='./qimages/3399-87.jpg'>
0.25
0.5
1.0
2.25
88. Dimensional formula ML2T represents:
Work
Force
Momentum
Power
89. A framed structure is said to be perfect if the following correlation is met between the number of joints and the number of the members
m 2j-3
m 3j-3
m 2j-1
m j-2 .
90. If ratio of excitation and natural frequency of vibration the transmissibility of .n vibration will be
0.5
1.0
1.5
2.0
91. Which one of the following is the preferred mode of transmission of power from one shaft to another when distance between the shafts is relatively small:
Gears
Belts
Ropes
Chains
92. If there is a gradual reduction in amplitude of vibration with time, the body is said to be
Free vibration
Forced vibration
Damped vibration
Un damped vibration
93. Porter governor is
Pendulum type governor
Dead weight type governor
Spring loaded governor
Inertia type governor
94. Sensitivity of an isochronous governor
Zero
One
Two
Infinity
95. Velocity of the belt for maximum power transmission by the belt and pulley arrangement
<img src='./qimages/3399-95.jpg'>
96. Which type of gears are used in connecting two coplaner and intersecting shafts?
Spur gear
Bevel gear
Helical gear
Worm and worm wheel
97. Which one of the following does not require a flywheel?
Steam engine
Engine driven press
CI engine
Gas turbine
98. If µ is the actual coefficient of friction in a belt moving in grooved pulley and groove angle is 2 . The virtual coefficient of friction will
<img src='./qimages/3399-98.jpg'>
99. Magnification factor for a single degree of freedom vibration is expressed
<img src='./qimages/3399-99.jpg'>
100. Primary unbalanced force due to inertia of reciprocating parts in a reciprocating engine is given
<img src='./qimages/3399-100.jpg'>
101. The mathematical technique for finding the best use of limited resources in an optimum manner is called:
Linear programming
Network analysis
Queueing theory
None of the above
102. For a speed reduction of 50 which gear arrangement will be used?
Spur gears
Bevel gears
Worm and worm wheel
Herringbone gears
103. For a 20° full depth involute gear teeth system, minimum number of teeth on a pinion
12
14
16
18
104. In a spring mass system if one spring of same stiffness is added in series, new frequency of vibration will
<img src='./qimages/3399-104.jpg'>
105. During the dwell period of the cam, the follower:
Remains at rest
Moves in a straight line
Moves with uniform speed
Does simple harmonic motion
106. Which one of the following correctively expresses the sensitivity of a governor? N 12
N1+N2/2N1N2
107. Which one of the following is electrically most conductive?
Copper
Silver
Aluminium
Gold
108. A relatively large plate of glass is subjected to a tensile stress of 40 MPa. If specific surface energy and Elastic modulus for glass are 0.3 J/m2 and 69 GPa, respectively, the maximum length of a surface crack that is possible without fracture
4.1 µ m
8.2 m
41 m
82 m
109. In the graphical method of linear programming problem the optimum solution would lie in the feasible polygon
Its one corner
Its center
The middle of any side
None of the above
110. Coordination number for FCC crystal structure
111. Atomic packing factor for unit cell of HCP crystal structure
0.68
0.52
0.74
0.82
112. Relationship between atomic radius and unit cell length for BCC crystal structure 4R
<img src='./qimages/3399-112.jpg'>
113. Which statement is not true in case of martensite?
Crystal structure is BCC
Transformation does not involve diffusion
Grains are plate like or needle like in appearance
It is a non-equilibrium phase
114. Which of the following statements is not true for diamond?
It is hardest known material
Diamond is non-metallic
It has high thermal conductivity
It has a very high electrical conductivity
115. Which one of the following has the highest value of specific stiffness?
Steel
Aluminium
Fibre glass
Carbon fibre composite
116. If a material expands freely due to heating, it will develop:
Thermal stresses
Tensile stresses
Compressive stresses
No stresses
117. Crystal lattice structure for mild steel
Single cubic
BCC
FCC
HCP
118. In tensile test of mild steel, necking will start:
At lower yield stress
At upper yield stress
At ultimate tensile stress
Just before fracture
119. Which medium is used for fastest cooling during quenching of steel?
Air
Oil
Water
Brine (salt water)
120. Compressive test performed on cast iron will have fracture occurring:
Along an oblique plane
Along the axis of load
Perpendicular to the axis of load
None of the above
121. Eutectoid steel consists
Fully pearlite
Fully Austenite
Ferrite Pearlite
Cementite Pearlite
122. Maximum principal strain theory of failure gives satisfactory result for:
Brittle materials only
Brittle as well as ductile materials
Ductile materials only
None of the above
123. Property of absorbing large amount of energy before fracture is known
Ductility
Toughness
Elasticity
Hardness
124. Which one of the following is weaker than hydrogen bonds?
Ionic bond
Vander Waals bond
Covalent bond
Metallic bond
125. Increase in ferrite phase in steel leads to increase
Strength
Hardness
Ductility
Brittleness
126. Austenite decomposes into ferrite and cementite at a temperature
727 °C
1148 °C
1495 °C
1539 °C
127. Slow plastic deformation in metals under a static load over a period of time
Fatigue
Endurance
Creep
Dislocation
128. Which of the following statements is not true for austenitic stainless steels?
They are hardened and strengthened by cold working
They are most corrosion resistant amongst stainless steels
Austenitic phase is extended to room temperature
They are magnetic in nature
129. The crystal structure of alpha iron
Body centered cubic
Face centered cubic
Hexagonal closed pack
Simple cubic
130. 18/8 stainless steel contains:
18% vanadium, chromium
18% chromium, nickel
18% tungsten, nickel
18% tungsten, chromium
131. Important property requirements for tool materials employed for high speed machining are:
Impact strength, melting point and hardness
Hot hardness, wear resistance and toughness
Melting point, toughness and shear strength
Shear strength, wear resistance and impact strength
132. Carbon content is highest in
Mild steel
Eutectoid steels
Hypoeutectoid steels
Hypereutectoid steels
133. Principal stress at a point in a plane stressed element are: s 500 N/m2 Normal stress on the plane inclined at 45° to x-axis will
0
500 N/m2
707 N/m2
1000 N/m2
134. If there are bad effects on strain hardening on a cold formed parts, the part must
Annealed
Tampered
Hardened
Normalised
135. Cold working is the process of deforming a metal plastically:
At recrystallization temperature
Below recrystallization temperature
Above recrystallization temperature
At annealing temperature
136. Which one of the following materials is most elastic?
Rubber
Steel
Aluminium
Glass
137. The temperature at which new stress free grains are formed in the metal is called:
Critical temperature
Eutectic temperature
Recrystallization temperature
Yield temperature
138. Toughness of steel is increased by adding:
Nickel
Sulphur
Chromium
Tungsten
139. In rolling process, the state of stress of the material undergoing deformation
Pure compression
Pure shear
Compression and shear
Tension and shear
140. Which one of the following is a point imperfection?
Vacancy
Frenkel defect
Schottky defect
All of the above
141. Which one of the following is closest to the purest form of iron?
Cast iron
Wrought iron
Grey cast iron
Mild steel
142. Addition of magnesium to cast iron increases its:
Hardness
Corrosion resistance
Creep resistance
Ductility
143. Which one of the following cannot be recycled?
Thermoplastics
Thermosets
Elastomers
Polymers
144. The most suitable manufacturing process for machining a turbine blade made of nimonic alloy
Milling and lapping
Electric discharge machining
Ultrasonic machining
Electro-chemical machining
145. Strain in direction at right angle to the direction of applied force is known
Lateral strain
Shear strain
Volumetric strain
None of the above
146. If the diameter of the hole is subjected to considerable variation, for locating in jigs and fixtures, the pressure type locator used
Conical locator
Diamond pin locator
Vee-locator
Cylindrical locator
147. Inter electrode gap in electro-chemical grinding is controlled by controlling the:
Pressure of electrolyte flow
Applied static load
Size of abrasives in the wheel
Texture of the workpiece
148. Pneumatic comparators work on following theory:
Newton's theory
Bernouli's theory
Pascal's theory
Legendre's theory
149. In machining processes, the percentage of heat generated in shear action is carried away by the chips to the extent
10
25
50
90
150. For a two dimensional stress system, the coordinates of the centre of Mohr circles are?
<img src='./qimages/3399-150.jpg'>
151. Which of the following is not a limitation for ECM process:
Very expensive
Sharp corners are difficult to produce
Surface finish is not good
Use of corrosive media as electrolyte makes it difficult to handle
152. The rate of work material removal in USM operation is proportional to the:
Volume of work material removed per impact
Number of particles making impact per cycle
Frequency of vibration
All of the above
153. Which of the following is not the assumption in Merchant's theory
Tool is perfectly sharp
Shear is occurring on a plane
Uncut chip thickness is constant
A continuous chip with built up edge is produced
154. Which technique is utilized to find percent idle time for man or machine?
Work sampling
Time study
Method study
ABC analysis
155. In Electro-chemical machining material removal is due
Corrosion
Erosion
Fusion
Ion displacement
156. In simplex method of linear programming the objective row of the matrix consists
Names of the variables
Coefficient of the objective function
Slack variables
None of the above
157. Which one of the following type of layout is used for the manufacturing of large air crafts?
Product layout
Process layout
Fixed position layout
Combination layout
158. Which of the following operations does not use a jig?
Turning
Drilling
Reaming
Tapping
159. The quality of machined surface depends
The material of the work piece
Rigidity of machine work-tool system
Cutting conditions
All of the above
160. The tool life of a cutting tool mainly depends
Cutting speed
Tool geometry
Ambient temperature
None of the above
161. Use of jigs and fixtures leads
High operational cost
High maintenance cost
High Initial cost
High manufacturing cost
162. For the two shafts connected in parallel, which of the following in each shaft is same?
Torque
Shear stress
Angle of twist
Torsional stiffness
163. Lee and Shaffer equation showing relationship between rake angle shear angle and friction angle is expressed
164. Metal in electro-chemical machining process is removed
Migration of ions towards the tool
Ionization and shearing
Chemical action and abrasion
Chemical etching
165. In an orthogonal cutting operation, the chip thickness and the uncut thickness are equal 0.45mm each. If the tool rake angle is the shear plane angle is
18°
30°
45°
60°
166. In a single point turning operation Taylor's exponent is 0.25. If the cutting speed is halved then the tool life will become:
Half
Two times
Eight times
Sixteen times
167. Standardization deals with the characteristics of product that include:
Its dimensions
Method of testing the product
Composition and properties of its material
All of the above
168. The critical speed of a shaft is affected by its:
1. Eccentricity
2. Span
3. Diameter Which of the above are correct?
1 and 2
1 and 3
2 and 3
2 and 3
169. Whirling speed of a shaft coincides with the natural frequency of its:
Longitudinal vibration
Transverse vibration
Torsional vibration
Coupled bending torsional vibration
170. Experts of same rank assemble for product development
Delphi technique
Brain storming
Direct expert comparison
Morphological analysis
171. A production line is said to be balanced, if at each station:
There is equal number of machine
There is equal number of operators
Waiting time for service is same
Operation time is same
172. When ordering cost is increased to 16 times, the EOQ will be increased
2 times
4 times
8 times
None of the above
173. Manufacturer's risk is the probability
Rejecting a good lot which otherwise would have been accepted
Defective batch being accepted which otherwise would have been rejected
Bad components in a lot
None of the above
174. Term "Value" in value engineering refers to
Total cost of the product
Selling price of the product
Utility of the product
Manufacturing cost of the product
175. Which one of the following shows the percentage of the area in normal distribution curve for ± 2 limits?
99.73
95.45
68.26
None of the above
176. In sampling, AQL stands for:
Average quality level
Acceptable quality level
Asymmetric quality level
Available quality level
177. There are rows and columns in a transportation problem. Degeneracy will occur if the number of allocations
Less than n
Greater than n
Equal to n
Less than n
178. C-chart is based on one of the following:
Number of defects per unit of a product
Fraction defectives in the sample
Number of defectives in the sample
None of the above
179. TQM is related
Quality control
Sampling
Control chart
Work study
180. The point of contraflexure occurs
Cantiliver beams
Overhanging beams
Simply supported beams
Fixed beams