1 The property by which a body regains its original shape after removal of force is defined as

plasticity

elasticity

ductility

malleability

2 Bending moment is maximum on a section of a beam where shear force is

maximum

minimum

equal

changing sign

3 The ratio of change in volume and original volume ofthe body is called as

tensile strain

compressive strain

shear strain

volumetric strain

4 A shaft of diameter subject to a bending moment and a twisting moment at a section. The maximum shear stress is given by the equation 16 16 t 1t d3 T2 t d3 T2 max max

5 In case of column

one end is hinged and other end fixed

one end is fixed and other end free

both ends are hinged

both the ends are fixed rigidly

6 Slenderness ratio ofa column may be defined as the ratio of its length to the

radius of column

minimum radius of gyration

maximum radius of gyration

none of the above MYT

7 What will be the thickness of metal required for a cast iron main 800 mm in diameter for water at a pressure head of 100 m if the maximum permissible tensile stress is 20 MN/m2 and weight ofwater is 10 kN/m3.

15mm

20mm

25mm

30mm

8 In case of circular section, the section modulus is given by 7t d3



16 7t d4



64

9 If the two axes about which the product of inertia is found, are such that the product of inertia becomes zero, the two axes are called as

centroidal axes

principal axes

major and minor axes

none of the above

10 Which one ofthe basic equation of simple bending is correct where I Moment ofInertia E Modulus ofElasticity F Stress at any fibre at a distance of y from neutral axis M Bending moment R Radius ofcurvature MFE MFR



y y IR IE FME FY R



y I R IME 6 MYT

11 The shear angle for two dimensional cutting operation is given by an equation where r cutting ratio a rake angle shear angle rcosa . rcosa 1.+ . tan . rsma -rsma 1-rsina 1+rsina 4 tan rcosa rcosa

12 The standard point angle ofdrill used for drilling a wood and fibre is

116° to 118°

130° to 140°

60°

125°

13 Which one of the following process is preferred for improving the surface finish ofa job?

Milling

Turning

Super finishing

Drilling

14 Which one ofthe following is a type ofbrass?

Babbit metal

Gun metal

Monel metal

Muntz metal

15 In which process the principle ofelectrolysis is used to remove metal from workpiece?

EDM (Electrodischarge Machining)

ECM (Electrochemical Machining)

EDG (Electrodischarge Grinding)

USM (Ultrasonic Machining)

16 Hot short phenomenon occurs in steel because of excess amount of

manganese

sulphur

silicon

phosphorus MYT

17 For holding irregular shaped work and carrying out eccentric turning suitable. is most

four jaw chuck

three jaw chuck

collet chuck

face plate

18 Recognize the type of defect in casting caused due to shift of the individual parts of a casting with respect to each other.

Blow holes

Mismatch

Swell

Warpage

19 Extrusion is a type of operation.

Hot Working and Cold Working

Welding

Casting

Fitting

20 For holding work piece, which is already drilled or bored, is used on lathe.

collet chuck

face plate

angle plate

mandrel

21 In lathe, tumbler gear mechanism is used to control motion of

tool carriage

job

tool post

tail stock

22 Which type of thread is generally used for split nut of lead screw of screw cutting machine?

Square

Vee

Butress

ACME

23 A planer differs from shaper in one important aspect that, in planer,

the work is fixed while tool reciprocates

the work reciprocates while tool is fixed

the work and tool, both move

the work and tool, both do not move 8 MYT

24 The process of removing metal by an elongated tool having a number of successive teeth of increasing size, which cut in a fixed path is known as,

reammg

boaring

broaching

honing

25 The property by virtue of which sand mould is capable of withstanding high temperature of the molten metal without fusing is known as

porosity

adhesiveness

cohesiveness

refractoriness

26 threading is generally used for gas, water or steam pipe joints.

BSW

BSE

BSP

None of these

27 Tool Steel has following elements.

Tungsten, Chromium, Vanadium

Chromium -Nickel

Tungsten, Chromium, Lead

None of these

28 For marking round shaped work piece be used.

Vee block

Angle plate

Try square

None of these

29 __are used for withdrawing pattern from the mould.

Riddles

Draw spikes

Vent wire

Slicks

30 Included angle of the centre for heavy work in lathe is

45°

60°

75°

none of these 9 P.T.O. lQ] MYT

31 Which one of the following is the best example of higher Kinematic Pair?

Universal joint

Shaft rotating in a bearing

Nut turning on a screw

Cam and follower

32 Which one of the following relationship holds good to express angle of friction and coefficient of friction



sin Jl

cos Jl

cot Jl

33 The ratio of pitch diameter to the number ofteeth, in a gear drive is termed as

circular pitch

gear ratio

module

none of the above

34 A load of 15 kN is raised by means of a screw jack. The mean diameter of the square threaded screw is 42 mm and the pitch is 10 mm. A force of 120 N is applied at the end of a lever to raise the load. Is the screw self locking?

Yes

No

Insufficient data to predict the result

None of the above

35 Assertion ,Spiral cams find its use in computers. Reason Spiral cams have two types of surfaces, convex and concave.

Both and are true and is the correct explanation for A

is true and is not the correct reason for

is false and is true

Both and are false statements

36 Which one of the follower is widely used and has a cylindrical roller free to rotate about a pin joint

Knife-edge follower

Roller follower

Mushroom follower

All the above 10 MYT

37 Which of the following circle is imaginary circle in study of gears?

Pitch circle

Addendum circle

Dedendum circle

All of them

38 Which of the following statement is correct?

The force of friction does not depend upon area of contact of two surfaces

The magnitude of limiting friction bears a constant ratio to the normal reaction between two surfaces

The force of friction depend upon area of contact of two surfaces

Both and

39 Dynamically unbalanced masses in rotating machines cause

vibration

noise

friction

wear

40 In a plate cam mechanism, with reciprocating roller follower, the follower has constant acceleration in case of

cycloidal motion

S.H.M.

parabolic motion

none of the above

41 A constant discharge passing through a conical pipe is an example of

steady uniform flow

steady non-uniform flow

unsteady uniform flow

unsteady non-uniform flow

42 Viscosity has the dimensions where F is force, L is length and T is time

FL-2 T

FL-I 1 1

FL12

FL2 T jg MYT

43 The centre of buoyancy of a submerged body

coincides with the centre ofgravity of the body.

is always below the centre of gravity of the body.

coincides with the centroid of the displaced volume of the fluid.

is always above the centroid of the displaced volume of the fluid.

44 The type of pump similar to propeller turbine is

lobe pump

jet pump

injector pump

axial flow pump

45 An impulse turbine

requires draft tube

is most suited for low head application

operates by initial complete conversion to kinetic energy

is not exposed to atmosphere

46 Hydraulic intensifier is a device used for

storing energy of fluid in the form of pressure energy

increasing pressure intensity of fluid

transmitting power from one shaft to other

none of the above

47 Hydraulic Ram is a pump which works on

the principle of water hammer

the principle of reciprocating action

the principle of centrifugal action

none of the above 12 MYT

48 Principle ofHydraulic accumulator is similar to the principle of

electrical transformer

electrical battery

electrical generator

electrical motor

49 A vertical circular cylinder is filled with water and then rotated about its vertical axis at a constant speed such that half the liquid spills out from the open top. At that instant, pressure at the centre of bottom should be

atmospheric pressure

sub-atmospheric pressure

one fourth of original value

more than atmospheric pressure

50 The fluids which have linear relationship between the magnitude of shear stress and the resulting rate of deformation are called

Ideal fluids

Non-Newtonian fluids

Newtonian fluids

Compressible fluids

51 Which of the following does not relate to a spark ignition engine?

Ignition coil

Spark plug

Distributor

Fuel injector

52 The ideal cycle on which steam engine works is

Camot cycle

Rankine cycle

Otto cycle

Joule cycle

53 The isentropic process on Mollier diagram is represented by horizontal line vertical line inclined line curved line 13 P.T.O. MYT

54 The dryness fraction of steam is equal to where m is mass ofdry steam and mmass of water in suspension. g r

m/

md g g g

m/ mr

mr! m g g

55 The locus of saturated liquid line and saturated vapour line meets at

boiling point

ice point

triple point

critical point

56 The effect of under cooling the refrigerant is to

reduce the refrigerating effect

increase the super heat of vapour

reduce the C.O.P. of the cycle

increase the C.O.P. of the cycle

57 Which one of the following conditions is the most suitable condition for comfort air conditioning?

25 DC DBT and 100% R.H.

20°C DBT and 80% R.H.

22°C DBT and 60% R.H.

28°C DBT and 40% R.H.

58 Which chemical is liberated during geothermal power generation?

Sulphur

Oxygen

Carbondioxide

Nitrogen 14 MYT

59 Assertion Steam expands in nozzles of impulse steam turbine. Reason Pressure of steam is converted into kinetic energy of steam in the nozzles.

Both and are true

Only is true

Only is true

Both and are not true

60 During cut-off governing of a steam engme, which one of the following parameter changes?

Speed

Steam pressure

Volume of steam supplied per stroke

Pressure and volume of steam supplied

61 Which calorific value of a fuel should be considered for calculation of thermal efficiency of a power plant?

Lower calorific value

Higher calorific value

Gross heating value

None of the above

62 A refrigerant machine working on reversed Carnot cycle consumes 3 kW for producing refrigerating effect of 500 kJ/min, for maintaining region at -40 ec, the higher temperature of the cycle will be

317K

44K

44ec

233K 15 P.T.O. lQ] MYT

63 Consider the following statements Efforts are made to harness non conventional energy sources for power generation. The conventional energy sources will be exhausted soon. Now select the answer from the following alternatives.

Both and are true, but is not the correct reason for

is true, but is false

is true, but is false

Both and are true and is the correct reason for

64 Match List-I with List-II using the correct code given below: List-I List-II A So lar Energy I Ocean waves B Tidal Energy II Steam from earth C Geothermal Energy ill Atomic fission D Gobar gas plant IV Flat plate collector V Anaerobic digestion ABC D

II ill IV

II illIV V

IV I II V

V I II III

65 Assertion The volumetric efficiency of Reciprocating Compressor (with clearance) is always less than 100%. Reason The air present in the clearance volume will expand before the intake conditions are reached and it occupies some volume of cylinder.

Both and are true and is not the correct explanation for

Both and are true and is true reason for

is true, but is false

Both and are false 16 MYT

66 The equation of work (with clearance volume) for a reciprocating compressor is given by the equation where Polytropic law pyt= c Va Effective swept volume PI Suction pressure P2 Final compressor pressure W 1 W n 1 PI W P V n-l I aP I I W P V n-1 1 a P 2

67 Isothermal compression for high speed compressor is achieved by the method

water jacketing

inter-cooling

external fins

all the above

68 Which one of the following air compressors is generally used in the gas turbines?

Axial flow rotary compressors

Radial blowers

Sliding vane compressors

Screw compressors

69 The efficiency of vane type air compressor as compared to roots air compressor for the same pressure ratio is

more

less

same

may be more or less 17 P.T.O. MYT

70 In Reciprocating air compressor the method of controlling the quantity of air delivered is done by

throttle control

blow-off control

clearance control

all the above

71 The work input to air compressor is minimum if the compression law followed is

PYl.35=C

Isothermal PY C

Isentropic py r C

py1.2 C

72 In centrifugal air compressor the pressure developed depends on

impeller tip velocity

inlet temperature

compression Index

all the above

73 The clearance volume in Reciprocating air compressor is provided to

reduce the work done I kg of air delivered

increase the volumetric efficiency of compressor

accommodate valves in the head of the compressor

create turbulence in the air to be delivered

74 What should be the intermediate pressure in two stage compression for minimum work of compression? pa Suction pressure Pi Intermediate pressure Pd= Delivery pressure





p.=p x Pd

1a 18 MYT

75 Which of the following efficiency is highly sensitive to a clearance volume of reciprocating air compressor?

Mechanical efficiency

Isothermal efficiency

Adiabatic efficiency

Volumetric efficiency

76 If the domestic refrigerator is kept in an insulated room, with its door open

the temperature of the room shall decrease after sometime

the temperature of the room shall increase after sometime

the temperature of the room shall remain unaffected

nothing can be predicted about the temperature of the room

77 Air refrigeration system operates on

reversed Carnot cycle

reversed Brayton cycle

reversed Otto cycle

reversed Stirling cycle

78 The statement that energy can neither be created nor be destroyed but can only be converted from one form to another is known as

Avogadro's hypothesis

Gay-Lussac's law

Second Law of thermodynamics

First Law of thermodynamics

79 Match List-I wlth List-II and select the correct code. List-I List-II A Heavy water I Diesel Engine B Rankine cycle II Gas Turbine C Fuel pump III Thermal Power Plant D Air compressor IV Nuclear Reactor A BC D

III I IT IV

II IV III I

I III II IV

IV III I II 19 P.T.O. MYT

80 Select a false statement for Spark Ignition (Sn engine.

It is based on Otto cycle

Requires an ignition system with spark plug in the combustion chamber

Compression ratio 6 to 10.5

Low self ignition temperature of fuel is desirable

81 The thermal efficiency of the ideal diesel cycle is given by equation where p Cut off ratio R Compression ratio



_1



none of the above pf

82 In an ideal Otto cycle the air standard efficiency is 56.5%. If the heat added during the constant volume process is 1000 kJ/kg, determine the work done.

1000 kJ/kg

1500 kJ/kg

565 kJ/kg

None of the above

83 The duration of the ignition lag in an engine depends on the factors like

chemical nature of fuel

mixture ratio

electrode gap

all the above

84 Select the most appropriate sentence applicable to knocking phenomena of the S.l. engine

In S.l. engine, the detonation occurs near the end ofcombustion.

In S.l. engine, the detonation occurs near the begining ofcombustion.

In S.l. engine, the detonation is of a heterogeneous mixture causing very low rate of pressure rise.

None ofthe above 20 MYT

85 is a device which atomises the fuel and mixes it with air, and is the most important part of the induction system in an engine.

Spark plug

Exhaust manifold

Carburettor

Silencer

86 Which one of the following device is needed for carburettor used in aircraft application?

Altitude mixture correction device

Automatic de-icing unit to avoid formation of ice in the choke tube

Both and

None of the above

87 Which one of the following method for determination of engine friction is only applicable for diesel engines and also the gross fuel consumption is plotted against brake power and it is extended backwards to zero fuel consumption?

Morse test

Motoring method

Deceleration method

William's line method

88 In a diesel engine fuel injection pump is used fuel injection pump and carburettor is used fuel injector is used neither fuel injection pump nor injector is used

alone is true

alone is true

and both are true

all are true

89 Subcooling is a process compression plant of coolipg the refrigerant at constant pressure, m a vapour

after compression

before throttling

before compression

after evaporation

90 Which of the following is a fossil fuel

Coal

Wood

Natural Uranium .

Hydrogen 21 P.T.O. IQ MYT

91 Which of the f()llowing is a single point cutting tool?

Milling cutter

Grinding wheel

File

Parting tool

92 Cost estimating may be defined as

the process of forecasting the expenses that must be incurred to manufacture a product.

the process of determination of an actual cost of a product after adding different expenses incurred in various departments.

the process of comparing actual cost with predicted cost.

the process of reducing the cost.

93 Gantt charts are used in Inventory control Machine utilization study Production scheduling Sales forecasting

94 The life of a cutting tool is most sensitive to

changes in depth of cut.



changes in feed rate.

changes in cutting speed. none ofthe above.

95 In PERT network analysis, the critical path is defined as

a path with sum of duration ofall activities having positive slack values.

a path with smallest sum of duration of activities on it.

a path with nodes having positive slack values.

a path with nodes having zero slack values.

96 Bill ofmaterials is

a listing of all the components and I or raw materials required to make a product.

bill of materials purchased.

bill of materials sold.

none ofthe above. 22 MYT

97 When holes are required to be drilled in several faces of a small workpiece, the jig used is

Pot jig

Boxjig

Latch jig

Post jig

98 A redundant location is said to exist, when two locators are attempting to constrain

one freedom from one location point

one freedom from two location points

two freedoms from one location point

two freedoms from two location points

99 Constant measuring pressure in micrometer screw gauge is ensured by

Lock nut

Barrel and Thimble

Spanner

Ratchet screw +0.00

100 Expressing a dimension as 15.6 -0.02 mm. is the case of

limiting dimensions

bilateral tolerance

unilateral tolerance

none of the above

101 In 'Selective Assembly' method

all the parts are always interchangeable.

size of one of the components is measured accurately and then mating component is made to match this size.

parts of anyone type are classified into several groups according to size and then assembled.

parts in an assembly, can be replaced by a similar part without any further alteration.

102 A dial gauge is a

measuring instrument

comparator

limit gauge

inspection fixture

103 Slip gauge is

Line standard

End standard

Line and end standard

None of the above 23 P.T.O. MYT

104 The term'Allowance' in limits and fits is referred to

Minimum clearance between shaft and hole.

Maximum clearance between shaft and hole.

Difference of tolerances ofshaft and hole.

Difference between maximum and minimum size ofhole.

105 The function of a commutator in a D.C. machine is

to prevent sparking.

to reduce iron losses.

to reduce friction.

to change alternating voltage to direct voltage.

106 The function of a starter in a D.C. machine is

to control speed.

to avoid excessive heating.

to avoid excessive current at starting.

to avoid armature reaction.

107 When B is a flux density in Wb/m2, I is the current in amperes, I is the length in meters, current carrying conductor in a magnetic field is subjected to a mechanical force (newton) given by BI BI



I I

F BI!

none of the above

108 In a half wave rectifier the ripple factor is

0.482

1.020

1.210

1.410

109 Thin middle layer of the transistor is called

Emitter

Collector

Base

None of the above 24 MYT

110 An addition of impurity atoms to a pure semiconductor makes it an

intrinsic semiconductor

extrinsic semiconductor

diffused semiconductor

all the above

111 The electron lens of a C.R.D. consists of

Grid and Cathode

Cathode and Filament

Shield and Grid

Focussing electrodes

112 Thermistors are semiconductor devices having

positive temperature coefficient of resistance

negative temperature coefficient of resistance

both and

zero temperature coefficient of resistance

113 Machining on castings produces chips.

continuous chips

discontinuous chips

slurry of fine form

continuous chips with built-up edge

114 Which of the following is not produced by powder metallurgy technique?

-Porous bearings

Grub screw

Carbide tools

Tungsten filament

115 Auto collimator is a

collimating device

small angle measuring instrument

angle measuring instrument

none of the above MYT

116 Time study in industries is performed to

improve efficiency of workers

set the time standard

simplify the work method

measure time variation in the job

117 For proper working of a transistor in normal circuits, the emitter-base junction and collector base junction are respectively

Reverse biased and forward biased

Forward biased and forward biased

Forward biased and reverse biased

Reverse biased and reverse biased

118 Commercially available electronic fan regulators make use of

Single S.C.R.

Triac and Diac

Triac

Anti parallel connected two S.C.R's

119 Identify the transistor circuit which acts as a phase inverter

Common base

Common collector

Common emitter

Both common base and common collector

120 Intrinsic semiconductors are those which

have more electrons than holes.

have zero energy gap.

are made of semiconductor material in its present form.

none of the above. MYT

121 The main advantage of an ultrasonic temperature transducer is that it can measure rapid temperature fluctuation. low temperatures. parameters other than temperature. stress distribution inside the heated body.

122 Input impedance of a FET is very large, hence it is used in Voltage measuring instrument. Current measuring instrument. Power measuring instrument. None of the above.

123 Synchronization ofC.R.O. means controlling the frequency alone controlling the frequency and phase both controlling the phase alone none of the above

124 At the extremely high frequency stability of a quartz crystal is due to Exhibition of piezo-electric effect by it. Its very high Q-factor. Its low temperature co-efficient. Both and

125 Consider the following statements related to the speed control of a D.C. motor. Speed may be controlled by changing the pole flux. Speed may be changed by changing voltage across the armature. Only is correct only is correct Both and are correct both and are not correct 1QI MYT

126 What type of starter is mostly used for starting a 3-phase slip ring induction motor?

Starter impedance starter

Star Delta starter

Auto transformer starter

Rotor resistance starter

127 Which one of the following statements related to ideal semi-conductor diode is true?

Unilateral device

Linear device

A device that has infinite resistance in the forward direction

Device that has same resistance in either direction

128 One of the principal reason for the widespread use of A.C. power system is availability of

the transformer

the moving iron instrument

the transmission lines

large quantity of power

129 A 60 watts, 250 volts lamp is operated from 125 volt, its intensity is

one fourth of original

one half of original

same as original

zero value

130 E.M.F. equation of D.C. generator is where Stands for flux per pole in Wb. Z No. of conductors P Poles of machine N Speed in RPM A No. of parallel path in armature E MF=pZNP NP



EMF-60A 60A NP

EMF=60A

EMF­60A 28 MYT

131 An alternating voltage has frequency of 50 Hz, a peak amplitude of 200 and a value at t 0 of 100 V. What is the equation of voltage v=200sin314t v=200sin(314t 100sin(314t v=200sin(377t

132 Mutual inductance of the two magnetically coupled coils depends on Number of turns of each coil. Flux produced by one and linked by the other. Current in the flux producing coil. All the above.

133 PERT stands for

Programme Estimation and Reporting Technique

Process Estimation and Review Technique

Programme Evaluation and Review Technique

Planning Estimation and Resulting Technique

134 Tool Dynameter is an equipment used for the measurement of

chip thickness

forces during metal cutting

deflection of cutting tool

wear of cutting tool

135 The extent to which data is scattered about the zone of "Central tendency" is known as

Dispersion

Medium

Arithmetic mean

Geometrical mean

136 Which is the control chart for fraction defective? V -chart P-chart X -chart C-chart MTI

137 Drill jig bush is used in drill jig for

locating and guiding the drill

pouring the coolant

removing the swarf

none of the above

138 A plug gauge is used for measuring

cylinders

cylindrical bores

spherical bores

angles

139 One micron is equal to

0.1 mm

0.01 mm

0.001 mm

none of the above

140 Surface roughness on a drawing is represented by

triangles

circles

squares

none of the above

141 Profile of a gear tooth can be checked by

sine bar

optical pyrometer

optical projector

none ofthe above

142 Fundamental deviation is one the zero line. as same as away from close to none of the above

143 Thread pitch of the metric screw threads is identified with

vernier

thread pitch gauge

micrometer

none of the above

144 Permeability in a magnetic circuit corresponds to an electric circuit.

conductivity

resistivity

resistance

none of the above 30 MYT

145 Ripple factor of a full wave rectifier is 0.48 1.48 0.84 none of the above

146 A SCR is a switch.

unidirectional

bidirectional

no-direction

none of the above

147 A transformer in which the primary voltage is greater than the secondary voltage is called

step-up transformer

step-down transformer

one-to-one transformer

none of the above

148 The rotor of a 3-phase induction motor always runs at

synchronous speed

less than synchronous speed

more than synchronous speed

none of the above

149 The force which creates the pressure that causes the current to flow through a conductor is called as

Voltage

Magneto motive force

Electro motive force

None of the above

150 Voltagegain ofaFETis usually __thantheordinarytransistors.

more

less

equal

none of the above