ROUGH WORK

1. During tightening of the nut on a bolt, the stress induced in the bolt is

Compressive Tensile


Shear Bending


2. The highest stress that a material can withstand for a specific length of time without excessive deformation is called

Fatigue strength Endurance strength


Creep rapture Creep strength


3. Maximum shear stress theory gives better results for

Brittle material Ductile material


Both None of these


4. If the diameter of a circular section is doubled its deflection is reduced by

16 times 8 times


4 times 2 times


5. Which of the following materials is highly elastic

Brass Steel


Rubber Cast Iron


6. Maximum slope of a cantilever of length 6 m carrying load at a distance of 4 m from fixed end is

Fixed end Under the load


Free end Can't predict


7. Two shafts of same length materials are joined in series. If the ratio of their diameter is then the ratio of their angle of twist will be

16
8. The ratio of average shear stress to the maximum shear stress in a beam with a square cross section is

2 1.5


2/3 1


9. The normal stress at a point are 6x 10 M Pa and 6y 2 M Pa and the shear stress at this point is 3 M Pa. The maximum principal stress at this point is

16 M Pa 14 M Pa


11 M Pa 20 M Pa


10. Tensile fracture in case of mild steel is

Cup and Cone type Fibrous type


Star type Granular type


11. The shape of the bending moment diagram for a uniform cantilever carrying a uniformly distributed over its length is

Straight line Hyperbola


An ellipse Aparabola


12. The ratio of circumferential stress to longitudinal stress in a thin cylinder subjected to internal hydrostatic pressure is
2 0.5
4
13. A hunting governor is

More sensitive More stable


Less sensitive None of these


14. The maximum fluctuation of energy in flywheel is equal to

I w (w1 w2) I w2 CS


2 E CS All of these


15. When the axis of the first and last gear are co-axial, then gear train is known as

Reverted gear train Epicyclic gear train


Compound gear train Simple gear train


16. The module of a spur gear is defined as
p d d

zz
zz


d p d
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17. The maximum power to be transmitted by the belt drive, the ratio of centrifugal tension to permissible tension is

1
0.5 3
18. When two shafts are neither intersecting, power can be transmitted by using

A pair of spur gears A pair of helical gears


An Oldham's coupling A pair of spiral gears


19. The tooth profile most commonly used in gear drive for power transmission is

A cycloid Aninvolute


An ellipse Aparabola


20. The moment of intertia of Flywheel is 200 kg m2 starting from rest it is moving with a uniform acceleration of 0.5 rad/sec.2 after 10 seconds from start, its kinetic energy will be

250 N-m 500 N-m


5000 N-m 25000 N-m


21. If w

where w is the frequency of excitation and wn is the natural frequency of vibration,
w
n
then the transmissibility of vibration will be

0.5 1.0


1.5 2.0


22. Logarithmic decrement of a damped single degree of freedom system is d. If stiffness of the spring is doubled and the mass is made half, then the logarithmic decrement of the system will be equal to

d/4 d/2


d 2 d


23. Hammer blow occurs when the centre of gravity of the balanced weight is

Directly above the wheel centre


Directly below the wheel centre


Directly above or below the wheel centre


Perpendicular to the wheel vertical plane


24. Balancing of a rigid rotor can be achieved by approximately using balancing weight is

A single plane Two planes


Three planes Four planes


25. The resultant of two equal forces is equal to either of them. The angle between the forces is

120º 90º


60º zero


26. Dimensions for moment of momentum are
-1
ML2 T MT
-3
ML2 T MT
27. When a bullet is fired from a gun, it is coiled in the backward direction, it is due to

Impulse Inertia


Conservation of momentum None of these


28. For perfectly elastic bodies the value of coefficient of restitution is

1 0.5 to 1


0 to 0.5 zero


29. The co-ordinate of the initial and terminal points of vector are and 10). The magnitude of vector is approximately

50 units 8.1 units


14.5 units 19.0 units


30. A projectile will cover the maximum vertical distance in a minimum time when the angle of projection is

30º 45º


60º 90º


31. A body of weight 600 N is placed on a horizontal surface which tend to move when a horizontal force of 200
3 N is applied. The angle of friction is

30º 45º


60º 90º


32. Two particles with masses in the ratio 1 4 are moving with kinetic energies. The magnitude of their linear momentum will conform to the ratio

1 8 1 2


2:1 4 1


33. Which of the following physical quantity is not a vector

mass momentum


impulse acceleration


34. Time acceleration graph of a body moving with uniform acceleration is a straight line

Passing through the origin Inclined to time axis


Parallel to time axis Parallel to acceleration axis


35. Which of the following is intermetallic compound

Ferrite Austentite


Pearlite Cunentite


36. Machine tool guide ways are generally hardened by

Flame hardening Vacuum hardening


Induction hardening Martempering


37. In oxy-acetylene gas welding for Complete Combustion the volume of oxygen required per unit acetylene is

1.0 1.5


2 2.5


38. Single point thread cutting tool should ideally have

Zero rake Positive rake


Negative rake None of these


39. Which of the following casting is not suitable for heat treatment

Low carbon steel Medium carbon steel


High carbon steel High speed steel


40. The approximate variation of the tool life exponent of cemented carbide tool is

0.03 to 0.08 0.08 to 0.20


0.2 to 0.48 0.48 to 0.70


41. Feed drives in CNC milling machines are provided by

Synchronous motor Induction motor


Stepper motor Servometer


42. Which of the following is a non-traditional machining method

milling drilling


grinding ultrasonic machining


43. Which of the following operation can produce a seamless tube

Rolling Blanking


Piercing Embossing


44. What is the correct sequence of the following parameters in order of their maximum to minimum influence on tool life
Feed rate Depth of cut
Cutting speed







45. 10 kg of air at 800 kPa are heated at a constant pressure from 450 K to 680 K. The work required is nearest to

524 KJ 960 KJ


715 KJ 660 KJ


46. Cyclic integral of this is zero

Work transfer Heat transfer


Temperature Latent heat


47. It is not an extensive property

Volume Pressure


Energy Entropy


48. This gas has maximum value of specific heat ratio .

Oxygen Helium


Methane Carbon-di-oxide


49. For real gases Cp Cv at

Critical temperature Triplepoint


Absolute zero temperature All temperature


50. If the thermal efficiency of a Carnot engine is the COP of a Carnot refrigerator is

3
51. It does not change during a throttling process

Entropy Enthalpy


Specific volume Volume


52. The exergy of an isolated system in a process

can never increase can never decrease


always remain constant always positive


53. For specific limits for the maximum and minimum temperature, the ideal cycle with the lowest thermal efficiency is

Carnot Otto


Diesel Dual


54. How do the pump work change when a simple Rankine cycle is modified with reheating

increase decrease


remains same none of these


55. Material handling is higher in case of

Process layout Product layout


Group layout Fixed position layout


56. If the demand for an item is doubled and the ordering cost halved, the economic order quantity


remain unchanged


original value

doubled 0.5 x original value

57. For lifting heavy jobs in a shop use is made of

Conveyors Overhead Crane


Fork Lift Hoist


58. Identify the chart which is used to determine the profit potential under varying conditions of output and cost

Gnatt chart Travel chart


Break even chart Emerson chart


59. The incentive wage plan in which saving are expressed as a percentage of standard time is

Hasley plan Bedanx plan


Rowan plan Linconplan


60. The act of expanding the process production is referred as

routing scheduling


follow up dispatching


61. Jobs going ahead of schedule are conveniently shown in

Pie chart Bar chart


Gnatt chart SIMO chart


62. Average height of a man in motion study is taken as

1.2 m 1.4 m


1.6 m 1.8 m


63. What describe therblig in micromotion study

A symbol A colour


Anactivity Standard symbol and colour


64. Which one of the following is not a work measurement technique

Work supply Simulation


Time study Analytical Estimation


65. Dynamic viscosity has the dimension as

ML T ML T

M L-1
T MLT
66. Resultant hydrostatic force acts through a point known as

Centre of gravity Centre of buoyancy


Centre of pressure None of above


67. Pitot tube is used for the measurement of

Pressure Flow


Velocity at a point Discharge


68. The range of coefficient of discharge for venturimeter

0.6 to 0.7 0.7 to 0.8


0.8 to 0.9 0.95 to 0.99


69. A boundary is known as hydrodynamically smooth if
kk
0.3 0.3

kk
0.25 6.0
where k. average height of irregularity from the boundary and d'.Thickness of Laminar-sub Layer.
70. The loss of pressure head for the laminar flow through pipe varies

as the square velocity directly as the velocity


as the inverse of the velocity none of the above


71. Boundary layer separation takes place if

pressure gradient is zero pressure gradient is positive


pressure gradient is negative none of these


72. The height of water column corresponding to a pressure equivalent of 750 mm of mercury

10.2 m 10 m


10.4 m 10.6 m


73. Existence of velocity potential implies that the fluid flow is

steady uniform


irrotational all of these


74. A fully developed laminar viscous flow through a circular tube has the ratio of maximum velocity to average velocity

2.0 2.5


3 1.5


75. For laminar boundary layer over an entire length of flate plate, the drag coefficient CD is given by:
0.074


eL) 0.25
0.37 0.455
1.5 2

eL eL
76. There is no geometrical distribution between the stream line, path line and streak line in case of

Laminar Flow Uniform Flow


Steady Flow Irrotational Flow


77. Which liquid metal can be taken as the best conductor

Tin Mercury


Bismuth Sodium



78. A decrease in heat transfer coefficient over the surface of a pin

Decreases its effectiveness


Increases its effectiveness


Does not affect its effectiveness


Its effectiveness will first increase and then decrease


79. The critical radius of insulation
1s 2K



2Kh h
h

2 Kh2K
80. The ratio of heat flow from two walls of thickness ratio 1 2 and thermal conductivity ratio 3 1 for the same temperature difference on the two sides is

5 1 6 1


2 3 3 2


81. The dimensional number relevant in transient heat conduction is

Grashof number Weber number


Fourier number Reynold number


82. The Prandtl number for air is about

0.1 0.7


1.7 1.0


83. With increase in flow velocity of fluid the boundary layer thickness will

decrease increase


does not change first increase then decrease


84.
Nusslet number is given by

85.
The absorptivity of a freshly white washed wall is close to


0.1 0.3


0.5 0.9



86.
The radiation shape factor between two large parallel plates is


zero 0.5


1.0 2.0



87.
The LMTD of a counter flow condenser as compared to that of a parallel flow condenser will be


More Less


Approximately same Exactly exact



88.
For a condenser of NTU 2 the effectiveness is


1 e-2 0.5


0.667 1.5



89.
If a Carnot refrigeration cycle is to have a COP of 5 the ratio of maximum temperature to minimum temperature in the cycle should be


1.2 1.5


2.0 2.5



90.
The refrigeration system of a passenger aircraft works on reversed


Brayton cycle Atkinson cycle


Carnot cycle Otto cycle



91.
Which part of the vapour compression refrigeration cycle produces the refrigeration effect


Condenser Evaporator


Throttle valve Compressor



92.
Which is usually costliest item in a refrigeration system


condenser capillary tube


compressor evaporator



93.
In a refrigeration cycle the effect of superheating on COP is


Decrease Remains change


Increase None of these




K µCP PC µ K
hL
K h L

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94. A refrigerant with highest critical pressure is

Carbon-di-oxide Ammonia


Freon-11 Freon-12


95. At the back of domestic refrigerator, the bank of tubes are

Evaporator tubes Condenser tubes


Refrigeration cooling tubes Capillary tubes


96. In cooling towers, the drift loss is around

20% 5 to 10%


10 to 20% 20 to 30%


97. The relative humidity during heating and humidification

Increases Decreases


May increase or decrease Remains constant


98. The wet bulb temperature during sensible cooling will

Decrease Remains constant


Increases Can't be predicted


99. In vapour absorption system lithium bromide is used as

Lubricant Cooling substance


Absorbent Refrigerant


100. The colour of flame during halide torch test for refrigerant will change to

Grey Blue or bright Green


Black Pink or Red


101. In a 4-cylinder petrol engine the standard firing order is







102. The knocking tendency of the petrol engine will increase when

Speed is decreased Speed is increased


Fuel air ratio is made rich Fuel air ratio is made lean


103. Cetane number is the measure of

Viscosity of fuel Ignition quality


Calorific value of fuel Auto Ignition temperature


104. With which of the following engines term scavenging is associated

Aero Engine Diesel Engine


High efficiency engines None of these


105. An engine indicator is used to determine

temperature m.e. p.


speed volume of the cylinder


106. Which one of the following types of compressor is mostly used for supercharging of I.C. Engines

Radial flow compressor Axial flow compressor


Root blower Reciprocating compressor


107. At constant efficiency horse power of a fan is

proposition to r.p.m proportional to (r.p.m)2


proportional to (r.p.m)3 a polynomial function of r.p.m.


108. With an increase in compression ratio the volumetric efficiency of air compressor will

decrease increase


remains same can't be predicted


109. For a jet propulsion unit, ideally the compressor and turbine work are

Equal Unequal


Not related to each other Unpredictable


110. In a gas turbine cycle, the turbine output is 600 KJ/kg, the compressor work is 400 KJ/kg and the heat supplied is 1000 KJ/kg. The thermal efficiency of the cycle is

80% 60%


40% 20%


111. The effect of supersaturation, in a nozzle is

to increase the heat drop to increase entropy


to decrease dryness fraction of steam to decrease specific volume of steam


112. Reheat factor in steam turbine depends upon

exit pressure only stage efficiency only


initial temperature and pressure only all of the above


113. For a given power an impulse turbine as compared to a reaction turbine has row of blades

less more


equal none of above


114. The pressure velocity compounding of steam turbine results in

More power output Large number of stages


Lesser friction losses Shorter turbine for a given total pressure


115. For reaction turbines which of the following governing methods is not used

Throttle governing By-pass governing


Nozzle control governing Throttle and by pass governing


116. Which of the following surge tank is also called throttle surge tank

Inclined surge tank Expansion chamber surge tank


Restricted orifice surge tank None of the above


117. Kinematic similarity between model and prototype is the similarity of

Shape Discharge


Stream line pattern Forces


118. If the specific speed of a turbine is more than 300, the type of turbine is

Pelton Kaplan


Francis Pelton with more jets


119. Cavitation can take place in case of
Pelton wheel Centrifugal pump
Reciprocating pump All of these
120. Main characteristics curves of turbine means
Curves at constant speed Curves at constant efficiency
Curves at constant head None of the above

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ROUGH WORK