EIJ-50100-A 1 [Turn over
ROUGH WORK

1. If two forces of magnitude act at an angle their resultant will be

2P cos . 2P cos ./2


2P sin . P cos 2.


2. In a statically determinate problem, the number of non-trivial equilibrium equations

equals the numbers of unknowns is less than number of unknowns


is more than number of unknowns cannot be determined


3. The number of independent scalar equations of equilibrium of a rigid body under concurrent force system is


4. D'Alembert principle states that system of forces acting on a body is following type of equilibrium with the inertia force of the body

static dynamic


both none


5. The law of conservation of mechanical energy is valid

irrespective of the nature of force field


only in gravitational field


only if the total work done by the particle in moving around in a closed trajectory


only if the forces is tangential to the trajectory


6. In the impact problem the following conditions must always be satisfied

the total kinetic energy remains unchanged


the total linear momentum remains unchanged


the magnitude of the total linear momentum is multiplied by the co-efficient of restitution


none of the above


7. The displacement of a particle undergoing rectilinear motion along the x-axis is given by t3 21t2 60t meters. The acceleration of the particle, when its velocity is zero will be

-18 m/s2 36 m/s2


9 m/s2 m/s2


8. Two metallic blocks having masses in the ratio 2:3 are made to slide down a frictionless inclined plane starting from rest position. When the blocks reach the bottom of the inclined plane, they will have their kinetic energies in the ratio

2:3 3:5


3:2 7:4


9. If a shaft made of ductile material is subjected to combined bending and twisting moments, calculation based on which one of the following theories would give the most conservative values

Maximum principle stress theory Maximum shear stress theory


Maximum strain energy theory Maximum distortion energy theory


10. If the area, length and the stress to which a bar is subjected be all doubled, then the elastic strain energy of the bar will be

Doubled Three times


Four times Sixteen times


11. If a cantilever beam of length the concentrated load P at the end is replaced by a bending moment P × the deflection will increase by

1 time 1.5 times


1.25 times 2 times


12. A single degree of freedom spring mass damper system has a spring of stiffness k 4 mass m 10 kg and a damper of damping constant c 240 its damped natural frequency will be

18 rad/sec 16 rad/sec


20 rad/sec 22 rad/sec


13. The ratio of maximum displacement of the forced vibration to the deflection due to static force is known as

Damping Factor Damping Coefficient


Logarithmic Decrement Magnification Factor


14. Stress concentration in static loading is

Very serious in ductile material Very serious in brittle material


Less serious in brittle material None of the above


15. If n links are connected at the same joint, the joint is equivalent to

binary joints binary joints


binary joints (2n binary joints


16. The mechanical advantage for a rigid link AB, whose driving end is A whereas driven end is B (neglecting friction effect), is given by

VA/VB VB/VA


VB.VA None of the above


17. If a mechanism has n links, then the number of instantaneous centers would be equal to

n n(n


n/2


18. If a constant velocity ratio of driving and driven shafts is required then the mechanism used is

Ackermann gearing Hooke's joint


Double Hooke's joint Grass-Hopper mechanism


19. The train value of a gear train is

equal to velocity ratio reciprocal of velocity ratio


always greater than unity none of the above


20. In a clock mechanism, the gear train used to connect minute hand to hour hand, is

Epicyclic gear train Reverted gear train


Compound gear train Simple gear train


21. The maximum fluctuation of the energy is the

sum of maximum and minimum energies


difference between the maximum and minimum energies


ratio of the maximum energy and minimum energy


ratio of mean resisting torque to the work done per cycle


22. If the rotating mass of a rim type flywheel is distributed on another rim type flywheel whose mean radius is half the mean radius of the former, then the energy stored in the latter at the same speed will be

Four times the first one Same at the first one


One fourth of the first one One and half times the first one


23. For a cycloidal tooth profile, pressure angle at Commencement of engagement, Pitch point
and End of engagement will be constant maximum, zero, maximum zero, maximum, zero zero, zero, maximum
24. Material having highest cutting speed is Cast iron Aluminium Bronze High carbon steel

25. Angle between the shear plane and work surface is known as

lip angle rake angle


cutting angle shear angle


26. Binding material used in cemented carbide tools is

Nickel Cobalt


Chromium Silicon


27. The usual ratio of forward and return stroke in shaper is
2:1 2:3 1:2 3:2
28. Tool life is most affected by cutting speed feed and depth tool geometry microstructure of material being cut
29. Poor surface finish results due to
heavy depth of cut high cutting speed low cutting speed coarse feed

30. Abrasive used for grinding ceramics and tungsten carbide is

Diamond


Silicon carbide


31. A twist drill is a

side cutting tool


end cutting tool


32. Gantt chart is used for

inventory control


production schedule


33. The main object of scientific layout is

to produce better quality of product


to minimise production delays


34. In value engineering, the term value refers to

manufacturing cost of the product


total cost of the product



Alumina


Boron carbide


front cutting tool


none of these


material handling


machine repair schedules


to utilise maximum floor area


all of these


selling price of the product


utility of the product


35. In inventory control theory, the economic order quantity is

average level of inventory


optimum lot size


capacity of a warehouse


lost size corresponding to break-even analysis


36. Production cost refers to prime cost plus

factory overheads


factory and administration overheads


factory, administration and sales overheads


factory, administration, sales overheads and profit


37. A systematic job improvement sequence will consist of

motion study time study


job enrichment all of these


38. Military type of organisation is known as

line organisation functional organisation


line and staff organisation line, staff and functional organisation


39. The procedure of modifying work content to give more meaning and enjoyment to the job by involving employees in planning, organisation and control of their work, is termed as

job enlargement


job rotation


40. Fixed position layout is also known as

analytical layout


static product layout


41. Slag inclusion in casting is a

surface defect


superficial defect


42. The most suitable material for die casting is

Steel


Nickel


43. Draft on pattern for casting is

shrinkage allowance


identification number marked on it


taper to facilitate its removal from mould


for machining allowance


44. Sprue in casting refers to

gate


riser


45. Ornaments are cast by

die casting


pressed


46. The aim of value engineering is to

find the depreciation value of a machine


determine the selling price of a product



job enrichment


job evaluation


synthetic layout


none of these


internal defect


none of the above


Cast Iron


Copper


runner


vertical passage


continuous casting


centrifugal casting



minimize the cost without change in quality of the product


all of the above

47. In time study, the rating factor is applied to determine
standard time of a job fixation of incentive rate merit rating of the worker normal time of a worker
48. CPM is the
time oriented technique activity oriented technique event oriented technique target oriented technique
49. Simplex method is the method used for value analysis linear programming network analysis queuing theory

50. Which of the following wage incentive plans guarantees minimum wage to a worker and bonus is paid for the fixed percentage of time saved

Halsey plan Gantt plan


Rowan plan Emerson's efficiency plan


51. Job evaluation is the method of determining the

relative values of a job worker's performance on a job


worth of the machine value of overall production


52. The routing function in a production system design is concerned with

manpower utilisation


quality assurance of the product


machine utilisation


optimising material flow through the plant


53. Direct expenses include

factory expenses selling expenses


administrative expenses none of these


54. String diagram is used

for checking the relative values of various layouts


when a group of workers are working at a place


where processes require the operator to be moved from one work place to another


all of the above


55. Which of the following types of layout is suitable for automobile manufacturing concern

product layout process layout


fixed position layout combination layout


56. Queuing theory is associated with inventory waiting time sales production time
57. PERT requires single time estimate triple time estimate double time estimate none of these

58. Which of the following statements is correct

analysis is based on Pareto's principle


Simulation can be used for inventory control


Economic order quantity formula ignores variations in demand pattern


all of the above


59. In break even analysis, total cost consists of

fixed cost sales revenue variable cost sales revenue


fixed cost variable cost fixed cost variable cost profit


60. In order to avoid excessive multiplication of facilities, the layout preferred is

product layout process layout


group layout static layout


61. Which of the following can be regarded as gas so that gas law could be applicable within the commonly encountered temperature limits
steam, CO (B) water vapour
222 22
SO, NH, CO, moisture air
2 32222
62. A closed system is one in which

mass does not cross boundaries of the system, though energy may do so


mass crosses the boundary but not the energy


neither mass nor energy crosses the boundaries of the system


both energy and mass cross the boundaries of the system


63. Absolute zero pressure will occur

at sea level


at the centre of the earth


when molecular momentum of the system becomes zero


under vacuum conditions


64. Intensive property of a system is one whose value

depends on the mass of the system, like volume


does not depend on the mass of the system, like temperature, pressure, etc.


is not dependent on the path followed but on the state


is dependent on the path followed and not on the state


.. .

a
.. .

65. The equation
p


R is known as
2
v

Real gas equation Maxwell's equation


van der Waal's equation Avogadro's equation


66. The basis for measuring thermodynamic property of temperature is given by

zeroth law of thermodynamics first law of thermodynamics


second law of thermodynamics third law of thermodynamics


67. If a fluid expands suddenly into vacuum through an orifice of large dimension, then such a process is called

free expansion hyperbolic expansion


adiabatic expansion parabolic expansion


68. Steam flow through a nozzle is considered as

constant volume flow constant pressure flow


adiabatic flow isothermal flow


69. The following cycle is used for air craft refrigeration

Brayton cycle Joule cycle


Carnot cycle Reversed-Brayton cycle


70. An ideal gas at 27ºC is heated at constant pressure till its volume becomes three times. The temperature of gas then will be

81 ºC 900 ºC


627 ºC 927 ºC


71. When two gases suddenly mix up with each other then resultant entropy of the system will

decrease increase


remain same attain negative value


72. If air is compressed adiabatically from atmospheric condition in a cylinder having compression ratio of then pressure at the end of compression shall be

6 ata


less than 6 ata


more than 6 ata


less or more than 6 ata depending on temperature at the end of compression


EIJ-50100-A 10
73. The air-fuel ratio of the petrol engine is controlled by

fuel pump governor


injector carburettor


74. Engine pistons are usually made of aluminum alloy because it

is lighter wears less


absorbs shocks is stronger


75. For maximum power generation, the air fuel ratio for petrol engine vehicles is of the order of

9 1 12 1


15 1 18 1


76. In a naturally aspirated diesel engine, the air is supplied by

a supercharger a centrifugal blower


a vacuum chamber an injection tube


77. Ignition quality of petrol is expressed by

octane number cetane number


calorific value self ignition temperature


78. Ignition timing of a multi cylinder petrol engine can be adjusted by

rotating the crank adjusting the spark plug gap


adjusting ignition coil position rotating the distributor


79. The elements of most concern in regard to pollution caused by engines are

CO and CO2 CO and hydrocarbons


CO2 and hydrocarbons hot products of combustion


80. Water boils when its vapour pressure

equals that of the surroundings


equals 760 mm of mercury


equals to atmospheric pressure


equals the pressure of water in the container


81. Which of the following gases has the highest calorific value

producer gas coal gas


coke oven gas blast furnace gas


82. The diameter of Cornish boiler is of the order of

1-2 m 1.5-2.5 m


2-3 m 2.5-3.5 m


83. Which of the following is fire tube boiler

locomotive boiler Babcock and Wilcox boiler


Stirling boiler all of the above


84. Which device is used in thermal power plants to reduce level of pollution

induced draft fan precipitator


chimney pulveriser


85. De-aeration of feed water is carried out because it reduces

cavitation of boiler feed pumps corrosion caused by oxygen


heat transfer coefficient pH value of water


86. As a result of blade friction the relative velocity at outlet of impulse turbine compared to inlet relative velocity is

nearly same less


10-15% less 30% less


87. Commonly used method of governing in steam turbines is by

throttle governing nozzle control governing


bypass governing hydraulic governing


88. Reheat cycle in steam power plant is used to

prevent excess of 10-12% moisture content in last stages of turbine


utilize heat of the flue gases


increase plant efficiency


improve condenser performance


89. For a convergent divergent nozzle, the mass flow rate remains constant if the ratio of exit and inlet pressures

is less than critical pressure ratio is equal to the critical pressure ratio


is more than critical pressure ratio isinfinity


90. The maximum velocity attainable at the throat of a steam nozzle is

supersonic velocity slightly less than sonic velocity


sonic velocity slightly more than sonic velocity


91. The effect of friction in nozzle is to

keep dryness fraction constant


increase dryness fraction


decrease dryness fraction


first increase dryness fraction up to a certain limit and then decrease


92. The super saturation of steam results in slight

increase in entropy increase of final dryness fraction


increase of discharge all of the above


93. The most efficient method of compressing air is to compress it

isothermally adiabatically


isentropically as per law PVn C


94. Aeroplanes employ following type of compressor

radial flow axialflow


centrifugal combination of above


95. Ratio of indicated horse power and brake horse power is known as

mechanical efficiency volumetric efficiency


isothermal efficiency relative efficiency


96. A compressor at high altitude will draw

more power less power


same power none of the above


97. Thermal conductivity of solid metals with rise is temperature normally

increases decreases


remains constant unpredictable


98. Heat is transferred by all three modes, viz, conduction, convection and radiation in

electric heater steam condenser


refrigerator condenser coils boiler


99. Ratio of heat flow q1/q2 from two walls of same thickness having their thermal conductivities as k1 2k2 will be
0.5 1

100. In heat exchangers, degree of approach is defined as the difference between temperatures of

cold water inlet and outlet hot medium inlet and outlet


hot medium outlet cold water inlet hot medium outlet cold water outlet


101. The value of Prandlt number for air is around

0.1 0.3


0.7 1.7


102. The energy distribution of an ideal reflector at higher temperature is largely in the range of

shorter wavelength longer wavelength


remains same at all wavelengths wavelength has nothing to do with it


103. The heat transfer equation .2T 0 is known as
Laplace equation General equation of heat transfer
Fourier equation Poisson's equation
104. Thermal radiation extends over the range of
0.01 to 0.1 µ 0.1 to 100 µ
100 to 250 µ 250 to 1000 µ
105. The boiling point of ammonia is
0 ºC -50 ºC
-33.3 ºC 33.3 ºC
106. One ton of refrigeration corresponds to
210 kJ/min 210 kJ/h
335 kJ/min 335 kJ/h
107. The refrigerant for a refrigerator should have
high sensible heat high total heat
high latent heat low latent heat

108. Refrigeration in aeroplanes usually employs the following refrigerant

CO2 Freon-11


Freon-22 Air


109. In a flooded type evaporator of a refrigerator, an accumulator at suction of the compressor is used to

collect liquid refrigerant and prevent it from going to compressor


detect liquid in vapour


superheat the vapour


collect vapours


110. When two refrigerants are mixed in the proper ratio, the mixture forms a third refrigerant called

synthetic refrigerant auxiliary refrigerant


high pressure refrigerant an azeotrope


111. The most suitable refrigerant for a commercial ice plant is

brine NH3


Freon air


112. Dew point temperature is constant as long as there is

no change in moisture content of the air


no change in volume of air


no change in dry bulb and wet bulb temperature


no change in relative and specific humidity of air


EIJ-50100-A 14
113. The comfort conditions in air conditioning are

22 ºC dry bulb temperature and 60% relative humidity


25 ºC dry bulb temperature and 100% relative humidity


20º C dry bulb temperature and 75% relative humidity


15º C bulb temperature and 80% relative humidity


114. Air is normally dehumidified by
injecting water passing steam
heating cooling

115. A fluid in equilibrium cannot sustain

tensile stress compressive stress


shear stress bending stress


116. Which of the following instrument can be used for measuring speed of an aeroplane

orifice plate hot wire anemometer


rotameter pitot tube


117. Euler's dimensionless number relates the following

Inertial force and gravity Viscous force and Inertial force


Pressure force and Inertial force Pressure force and viscous force


118. Power transmitted through a pipe is maximum when the loss of head due to friction is

one-half of the total head supplied one-third of the total head supplied


one-fourth of the total head supplied zero


119. The efficiency of a centrifugal pump is maximum when its blades are

straight bent forward


bent backward bent forward first and then backward


120. In axial flow fans and turbines, fluid enters and leaves as follows

radially, axially axially, radially


axially, axially radially, radially


ROUGH WORK