Question Booklet Series
Mechanical Engineering CODE

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KL-14/ME Series-A
Q1. An iron ball and a cotton ball of same mass are thrown from a height h in air. Then

the iron ball will reach the ground first


the cotton ball will reach the ground first


both balls reach the ground at the same time


None of these


Q2. Acceleration due to gravity is

same at all places


more at the equator of the earth than at the poles


decreasing with altitude


All are correct

Q3. A man moving in an accelerated train on horizontal tracks feels that his weight has/is


decreased increased
zero same



Q4. The number of independent equations available from static equations of equilibrium for plane problems are
3 6
Q5. According to the law of equilibrium, two forces are said to be in equilibrium only ifthey are

equal in magnitude and opposite in direction opposite in direction


collinear in action Both and


Q6. A block slides down a smooth inclined plane at 30° in time from the top. Ifan identical block is released from the same point, falling freely to the ground, then it will reach in time
tl2 t/3 t/4 t
Q7. A zero torque acting on a system results in conservation of

angular momentum linear momentum


angular velocity energy


Q8. A railway train of 200m long passes over a bridge of 600m long. If the train is moving at 10m/s, the time taken to cross the bridge
60s 90s 80s lOOs
Q9. Two bodies ofmasses ml and m2 are dropped from the same height. The ratio of their momentum at the ground is

m/m2 mimi


(m/ml)li2


QlO. A body of weight W is placed on an inclined plane. The angle made by the inclined plane with horizontal, when the body is on the point ofmoving down is called

angle ofinclination angle ofrepose


angle offriction angle oflimiting friction


KLI4/ME Series-A
Q11. The statement if three forces acting at a point can be represented in magnitude and direction by the sides of a triangle taken in order, the forces are in equilibrium" -is known as

Lami's theorem Law ofPolygon offorces


Law oftriangle offorces Newton's law offorces


Q12. If a body is moving in a straight line, the motion ofthe body is called

rectilinear rotational


curvilinear helical

Q13. The expression where m is the mass and v is the velocity; denotes


centrifugal force kinetic energy


potential energy centripetal force


Q14. Free body diagram of a body in a force system is

Completely isolated from the system incompletely isolated from the system


completely attached to the system incompletely attached to the system


Q15: Centroid ofa body is its:­

geometrical concentration mass concentration


weight concentration density concentration


Q16. The apparent weight of a man in moving lift is less than his real weight when it is going down with

uniform speed an acceleration


some linear acceleration retardation


Q17. When a body falls freely under gravity it possesses

maximum weight minimum weight


no weight a weight depending upon velocity


Q18. When a body slides down an inclined surface, inclined at an angle the acceleration a of the body is given by
a a =gtan
Q19. Strain energy is the

energy stored in a body when strained within elastic limits


energy stored in a body when strained upto the breaking of a specimen


maximum strain energy which can be stored in a body


proofresilience perunit volume ofa material


Q20. A vertical column has two moments of inertia (i.e. Ixx and Iyy). The column will tend to buckle in the direction ofthe

axis ofload perpendicular to the axis of load


maximum moment of inertia minimum moment of inertia


Q2l. The neutral axis of the cross-section a beam is that axis at which the bending stress is Q23. A steel bar of 5 nun is heated from 15° C to 40° C and it is free to expand. The bar will
Zero Maximum Minimum Infinity
Q22. Euler's formula holds good only for short columns Both short and long columns long columns weak columns
KLl4/ME Series-A 2

induce

no stress shear stress


tensile stress compressive stress


Q24. The stress induced in a body, when suddenly loaded, is thc stress induced when the same load is applied gradually.

equal to one-half


twice four times


Q25. If the slenderness ratio for a column is 100, then it is said to be a column.

long medium


short expanded


Q26. The maximum diameter ofthe hole that can be punched from a plate of maximum shear stress 1/4th of its maximum crushing stress ofpunch, is equal to (where thickness ofthe plate)

Q27. When a rectangular beam is loaded transversely, the maximum compressive stress is
developed on the

top layer bottom layer


neutral axis every cross-section

Q28. The point of contra flexure is a point where


shear force changes sign bending moment changes sign


shear force is maximum bending moment is maximum


Q29. The maximum stress produced in a bar of tapering section is at

smaller end larger end


middle anywhere


Q30. In compression test, the fracture in cast iron specimen would occur along

the axis ofload an oblique plane


at right angles to the axis of specimen would not occur


Q31. When shear force at a point is zero, then bending moment is at that point.

Zero Minimum


Maximum None of these


Q32. In a kinematic pair, when the elements have surface contact while in motion, it is a

higher pair closed pair


unclosed pair lower pair


Q33. "Scotch Yoke" is an inversion of

slider crank mechanism double slider crank mechanism


4-bar linkage None of these


KL14/ME Series-A Q34. Which type ofgears has a constant pressure angle while meshing?

cycloidal gears involute gears


Both and None of these


Q35. Which type ofgovernor has controlling force diagram a straight line passing through the ongm

proell governor unstable governor


. isochronous governor porter governor


Q36. The difference between the maximum and minimum kinetic energies of the flywheel is known as

coefficient of fluctuation of energy maximum fluctuation of energy


maximum fluctuation of flywheel None of these


Q37. The conditions for static balancing and dynamic balancing in rotating masses are

l:mr2 0 and Imr21= 0 respectively Imr21= 0 and l:mr2 0 respectively


l:mr 0 and Imrl 0 respectively l:mrl 0 and Imr 0 respectively


Q38. A helical spring, having N number of coils, has spring-eonstant 2000 N/m. If there is another helical spring of the same material and same wire diameter and having N/2 number of coils, its spring-eonstant will be

4000 N/m 2000 N/m


1000 N/m 500 N/m


Q39. Choose the correct option for the given blank space"While using method to find the natural frequency offree vibrations, it is assumed that kinetic energy at mean position is equal to the potential energy at the extreme positions."

energy equilibrium


kennedy's rayleigh's


Q40. Which of the following is a spring controlled governor

hartung governor watt governor


porter governor None of these


Q41. If different masses are rotating about an axis in a single plane at different radii, then for their complete balance, it is sufficient to analyze the conditions of­

static and dynamic balancing both static balancing only


dynamic balancing only None of these


Q42.Which one of the following types of gears can be used for speed reduction purpose only

spur gears bevel gears


helical gears wonn and wonn-wheel


KL14/ME Series-A
Q43. Initial contact between the driving and driven gear teeth occurs at a point where­

addendum circle of driven wheel interacts the line of action


dedendum circle ofdriven wheel interacts the line ofaction


dedendum circle of the driver wheel interacts the line of action


adden£ium circle of the driver wheel interacts the addendum circle of driven gear


Q44. Oldhem's Coupling is used to connect two shafts which are

Intersecting perpendicular


parallel co-axial


Q45. The portion of the cutting part enclosed between the face and the flank is called

wedge shank


base rake face


Q46. Only two perpendicular components of cutting force act on the tool in case of__cutting.

oblique orthogonal


3D inclined


Q47. Operation of bending a partially cut hole on one side is called

nibbling slitting


lancing spiral


Q48. On increasing the value ofrake angle, the strength of the tool

increases decreases


remains constant is unpredictable


Q49. Angle between portion of side flank immediately below major (side) cutting edge and a line perpendicular to the base of the tool is called angle.

end relief side rake


side relief side clearance


Q50. Which of the following is not a specification oflathe machine tool?

chuck size swing over diameter


distance between centers bed length


Q51. In milling process, feed direction and direction ofrotation ofcutter are in direction.

up, opposite up, same


down, opposite down, reverse


Q52. In shaper machine tool, workpiece and tool

reciprocates, rotates. remains stationary, rotates.


remain stationary, reciprocates. rotates, reciprocates.


Q53. In oxidizing flame, the inner core attains a temperature of

2100 2800


3150 3500


KLl4/ME Series-A
Q54. Which of the followi!1g is not a function of flux that is added during casting of cast iron?

absorbs impurities replenishes material loss


protects casting from oxidation forms slag


Q55. Arc blow occurs in welding.

DC AC


gas resistance


Q56. During welding when the weld reduces the cross-sectional thickness of the base metal it is called


lack ofpenetration spattering


undercutting blow hole


Q57. The connecting roads of IC engines are manufactured using the process of

extrusion drop forging


rolling spinning


Q58. Plastic bottles are manufactured using the process of:

blow molding injection molding


atomizing die casting


Q59. The fraction defective chart that records the proportion defective items in a sample chart.

X bar R


c


Q60. Which of the following statement is not true for break-even analysis?

fixed cost does not vary with the total production.


total cost varies with the total production.


variable cost is dependent on total production.


break-even point is the point where fixed cost line and variable cost line intersect with each other on a volume cost graph.


Q61. VED analysis ofinventory management stands for

Vital-Essential-Desirable Valuable -Easy-Difficult to obtain


Very Essentially Desired Valuable -Effective -Difficult to obtain


Q62. The symbol of rectangle shape represents the process of in process analysis.

transportation operation


inspection delay


Q63. Which of the following is not a type of flow process chart?

material method


machine man


Q64. Which of the following is not the definition of Quality?

conformance to specification fitness for use


spare part maintenance customer delight


KL14/ME Series-A Q65. Which of the following method is used for recording path of movement during method
study?

chronocyclographs simo chart


two handed process chart therbling


Q66. In a layout all machines or process ofthe same type are grouped together.

fixed position factory


process product


Q67. Mass production is characterized by

low volume high variety high volume low variety


high volume high variety low volume low variety


Q68. The Therblig symbol used for micro motion of 'release' is



Q69. process chart is a graphic representation ofthe sequence of all the operations and inspections involved in a process or procedure.

operation outline


travel flow process


Q70. Formula for calculating standard time when observed time rating factor and PFD allowances are known is:

+PFD





Q71. Formula for calculating EOQ in inventory management is:
(A).EOQ 1/2 EOQ 1/2

EOQ 1/2 EOQ 1/2 Where D is annual demand quantity, K is fixed cost per order and H is Annual holding cost.
Q72. As per the principles of motion economy related to the sitting standing work place for males the thigh clearance should range between:

10" to 12" 8" to 10"


6" to 8" 12" to 14"


Q73. A single fixed point temperature scale is based on

ice point steam point


triple point of water critical point ofwater


Q74. Which one ofthe following correctly defines IK, as per the internationally accepted definition oftemperature scale?

(1I100)th of the difference between normal boiling point and normal freezing point


(1I273.15yh of the normal freezing point of water


100 times the difference between the triple point of water and normal freezing point of vater


(!/273.16yh of triple point of water


KL!4/ME Series-A Q75. Which thermometer is independent ofthe substance or material used in its construction?

mercury thermometer alcohol thermometer


ideal gas thermometer resistance thermometer


Q76. The following are the examples of some intensive and extensive properties
1. pressure 2. temperature 3. volume 4. velocity
5. electric charge 6. magnetization 7. viscosity 8. potential energy Which one ofthe following sets gives the correct combination of intensive and extensive properties?
Intensive Extensive





Q77. A system is capable of exchanging energy with its surroundings in the form of n-reversible work modes. The number of independent variables that completely specifY the state of the system is
n-2 n-l
n n+l
Q78. If 8Q is the heat transferred to the system and 8W is the work done by the system, then which of the following is an exact differential

8Q


8Q 8W


Q79. Air enters an adiabatic nozzle at 400 kPa and 900K with negligible velocity. Ifthe flow is ideal and exit pressure is 100kPa, the exit temperature in K and exit velocity in mls are respectively

605.7, 768.7 225, 1164.8


516.9,877.5 129.2, 880.1


Q80. 170kJ of heat is supplied to a system at constant volume. Then the system rejects 180kJ of heat at constant pressure and 40kJ of work is done on it. The system is finally brought to its original state by an adiabatic process. If the initial value of internal energy is 100kJ, then which one of the following statements is correct?

the highest value of internal energy occurs at the end of the constant volume process


the highest value of internal energy occurs at the end of the constant pressure process


the highest value of internal energy occurs after adiabatic expansion


internal energy is equal at all the points


Q81. In a given process of an ideal gas, 8W=0 and 8Q<O. Then for the gas

the temperature will decrease the volume will increase


the pressure will remain constant the temperature will increase


Q82. According to the Clausius statement of second law of thermodynamics, the COP of a refrigerator is never
<Xl 1

KLl4/ME Series-A
Q83. A process is irreversible and aqiabati(C) Process is reversible and adiabati(C) The entropy change in process'A' and process respectively are

zero and positive zero and negative


negative and zero positive and zero


Q84. Which one ofthe following statements is FALSE?

a mixture of an ideal gas also behaves as an ideal gas


the enthalpy of an ideal gas is a function oftemperature only


the entropy ofan ideal gas is a function oftemperature only


the temperature of an ideal gas always decreases during isentropic expansion


"
Q85. For a refrigerant being used in a vapour compression refrigeration system, the Joule-Thomson coefficient should be

positive negative


zero infinity


Q86. First law of thermodynamics is valid for

all processes


reversible processes only


cyclic processes only


only cyclic processes that are carried out reversibly


Q87. A domestic refrigerator, set at handles on an average a thermal load of 8000kJ per day. The ambient temperature is 30°C and the COP of the refrigerator is 0.15 times that of a Carnot refrigerator. The daily electricity consumption in kWh is approximately

1.47 1.51


3.28 2.86


Q88. COP of a reversed Carnot cycle refrigerator working between higher temperature T2 and lower temperature TI

will increase with increase in T I keeping T2 fixed


will decrease with increase in T I keeping T2 fixed


will first increase with increase in T1 and then decrease withincrease in keeping T2 fixed


none of the above



Q89. A refrigerating machine working on reversed carnot cycle takes out 2kW of heat from the cold body while working between the temperature limits of 300K and 200K. The COP and power consumed by the cycle will be respectively
1 and IkW I and 2kW
(C)2and I kW 2 and 2 kW
Q90. A 1 ton capacity water cooler cools water steadily from 35°C to 20o(C) The specific heat of vater is 4.18 kJ/kg-K. The water flow rate will be nearly 13.33 liter/hr 33.3 liter/hr
200 liter/hr 250 liter/hr
KLI4/ME Series-A
Q91. Consider the following statements:
Dry compression in reciprocating compressor is preferred because it

1.
prevents valve damage

2.
enables use of thermostatic expansion valve

3.
minimizes irreversibility in the compressor

4.
prevents washing out of the lubricating oil from cylinder walls
Which ofthese statements are correct?



(A)1and2 (B)2and3
(C)1and4 (D)3and4
Q92. Sub-cooling heat exchanger is used in a refrigeration cycle. The enthalpies at condenser outlet and evaporator outlet are 78 kJlkg and 182 kJlkg respectively. The enthalpy at outlet of isentropic compressor is 230 kJlkg and enthalpy of sub-cooled liquid is 68kJ/kg. The COP of the cycle is
3.25 2.16 3.0 3.5
Q93. Waste heat can be effectively used in which one of the following refrigeration systems?

vapour compression refrigeration cycle


air refrigeration cycle


vapour absorption refrigeration cycle


vortex refrigeration cycle


Q94. In a Vapour absorption refrigeration system, heat is rejected in

condenser only generator only


absorber only condenser and absorber


Q95. An Electrolux refrigerator uses

one pump two pump


no pump three pump


Q96. Which one ofthe following refrigerants has the highest critical temperature?
H20 CO2 R-12 NH3
Q97. Dew point temperature is the temperature at which condensation begins when air is cooled at constant

volume entropy


pressure enthalpy


Q98. The main process which takes place in a dessert cooler is

sensible cooling dehumidification


adiabatic saturation cooling and dehumidification


Q99. Due to rotation of the impeller of a centrifugal pump in liquid surroundings

a momentum acts on the liquid


a torque acts on the liquid in the direction of rotation


a torque acts on the liquid in the direction opposite to the direction of impeller rotation


just loss of energy alone takes place


Q100. Cavitation damage in a turbine runner occurs near

the inlet on the concave side of the blades


the outlet on the convex side of the blades


the inlet on the convex side of the blades


the outlet on the concave side ofthe blades


KLl4/ME Series-A