Exam Details
| Subject | automobile engineering | |
| Paper | ||
| Exam / Course | mains | |
| Department | ||
| Organization | maharashtra public service commission | |
| Position | assistant motor vehicle inspector | |
| Exam Date | 2002 | |
| City, State | maharashtra, |
Question Paper
1 Which one is the low-pressure steam generator?
Benson steam generator
Loeffler steam generator
Volex steam generator
none ofthese
2 Compression ratio for compressor is always
more than 1.0
less than 1.0
equal to 1.0
zero
3 Compressor capacity is expressed in
m3/kg
KW
KWh
m3/min
4 In a compressor, the clearance volume is kept minimum, because it affects
isothermal efficiency
compressor efficiency
volumetric efficiency
none of the above
5 The performance of a reciprocating compressor is expressed by
adiabatic work
isothermal work
isothermal work/indicated work
none of the above
6 Air conditioning controls
temperahrre only
humidity only
motion of air and humidity
All the above three factors
7 In a multi-stage compression with intercooling, work required is
reduced
increased
not changed
none of the above
8 In a double acting compressor, the air is compressed
in a single cylinder
in two cylinders
in two stages on one side
in a single cylinder on both sides
9 In a compressor, the volume of air sucked during the suction stroke is known as
free air delivered
swept volume
compressor capacity
none of the above
10 The ratio of delivery pressure to suction pressure of air is called
volumetric efficiency
expansion ratio
compression efficiency
compression ratio
11 In a two-stage air compressor, an intercooler is placed
before L.P. cylinder
after H.P. cylinder
in between L.P. and H.P. cylinder
none of the above
12 1 ton of refrigeration is the
mass of refrigerant flow per second
mass of refrigeration unit
rate of ice formed per second
heat extraction at a rate of 3.5 kJ per second
13 A house-hold refrigerator works on
vapour absorption cycle
vapour compression cycle
Carnot cycle
Bell-Coleman cycle
14 The voltage required to produce a spark between the spark points in spark plug is in the range
2 to 4 kV
5 to 5.5 kV
6 to 10 kV
12 to 15 kV
15 The ratio of heat extracted from refrigerant to work supply is called
coefficient of performance of heat pump
coefficient of performance of refrigerator
refrigeration efficiency
relative coefficient of performance
16 What is the refrigerant used in a house-hold refrigerator
Freon-22
Freon -11
Freon-12
NH3
17 Bell-Coleman cycle is a
reversed Camot cycle
reversed Joule cycle
reversed Otto cycle
none of the above
18 The C.O.P. of a one-ton VCC refrigerating machine is 3.5. The minimum power needed to run this machine would be
1.00 HP
1.00 KW
1.00 KWh
3.50 KW
19 A domestic refrigerator has an expansion device in the form of a/an
Automatic expansion valve
Hand operated expansion valve
Float valve
Capillary tubes
20 A package type Air conditioner has a capacity upto around
1 ton
100 tons
20 tons
none of the above
21 This reading will be the same in Centigrade and Fahrenheit temperature units.
100
-100
-40
40
22 Absolute humidity is defined as
Weight of water vapour present in unit volume of air
Weight of water vapour present in 1 Kg of air
Weight of moist air per m3 of volume
none of the above
23 The function of a governor of steam engine is to
save steam
control the speed
provide safety to the people around
maintain constant load on the engine
24 Humidostat is a device which is sensitive to
Moisture changes
Temperature changes
Moisture and temperature changes
None of the above
25 A steel rod of 20 mm diameter and 500 mm long is subjected to an axial pull of 30 kN. If E=2 x 105 N/mm2, the elongation of the rod will be
0.239 mm
0.0239 mm
0.00239 mm
23.9 mm
26 What is the strain in a bar having cross-section area 50 mm2 subjected to 10 kN axial load? Assume Young's Modulus as 2 x 105 N/mm2.
0.001
0.002
0.0001
0.01
27 If the end portion of a beam is extended beyond the support, it is known as
Cantilever beam
Continuous beam
Overhanging beam
Fixed beam
28 A rectangular section has 200 mm depth and 300 mm width. Determine Moment of Inertia about centroidal axis parallel to the width.
450 x 10^6 mm4
200 x 10^6 mm4
300 x 10^6 mm4
600 x 10^6 mm4
29 Section Modulus of a circular cross-section about its diameter is given as......
pi D4/16
pi D3/32
pi D4/32
pi D4/64
30 Deflection of a Cantilever beam, measured at its free end, subjected to uniform load intensity over a span is given as
=Young's Modulus; I =Moment of Inertia about Neutral axis)
wl4 EI
wl4 EI
wl4 EI
wl4 /16 EI
31 What is the slope at the fixed end of a cantilever beam, subjected to concentrated load at its free end
30°
90°
0°
None
32 Deflection at the centre of a simply supported beam, with uniformly distributed load per unit length over the entire span having modulus of elasticity "E" and Moment of Inertia is given as
33 Euler's Buckling load on a column of length with both ends hinged, is given as =Young's Modulus; I Moment of Inertia of Column Cross-section)
pi EI/ l2
pi EI/ l
pi2 EI l2
2pi2 EI /l2
34 Water main 800 mm in diameter contains water at a pressure load of 120 m. If density of water is 10000 determine the metal thickness with allowable tensile stress 24N/nun2.
10 nun
20 nun
24 nun
18 nun
35 Very thin grinding wheels are made with
Shellac bond
Rubber bond
Vitrified bond
Resinoid bond
36 What are the main raw materials required for production of pig iron?
Iron, coal and flux
Iron ore, coke and lime stone
Iron ore, cooking coal and flux
Iron ore, coal and dolomite
37 What are the main constituents of Babbitt metal used in industry
Copper-tin-antimony
Copper-tin-phosphorus
Copper-tin-nickel
Copper-zinc-nickel
38 Which metal is used for a wide variety of small components of electrical equipment, buses, ordinance work and belts, rods, tubes, etc.
Monel metal
Bell metal
Muntz metal
Gun metal
39 Which of the following is a chipless machining process?
Knurting
Metal spinning
Hobbing
Lapping
40 For which engineering purposes, uranium, thorium, plutonium, zirconium, beryllium, niobium and their alloys are primarily used
Electronic Engineering
Nuclear Engineering
Telecommunicalion Engineering
Computer Engineering
41 V-Ihich process of metal-working is simply a plastic deformation performed to change shape and dimensions by mechanical pressure?
ECM
EDM
Extrusion
Shaping
42 Tumbling is done to
remove blow holes
create hard surface
clean the casting
fill-up the blow holes
43 What is the temperature of metal in hot working process at which new grains are formed?
Below the recrystallisation temperature
Above the recrystallisation temperarure
At melting temperature
Above melting temperature
44 Withdrawal of the pattern from the sand of the mould, without breaking the mould, is possible by providing
shrinkage allowance
draft
rapping allowance
finish allowance
45 The process used for making large-diameter pipes, hollow propeller shafts or gun barrels, is
Centrifugal casting
Forging
Rolling
Die-casting
46 Which heat treatment is applied to remove stresses and improve the mechanical properties and increase machinability
Normalising
Hardening
Tempering
Annealing
47 What are the two basic ways of metal cutting using a single-point cutting tool and a multi-point cutting tool?
"Single" and "multi-direction" cutting
"Perpendicular" and "Oblique" cutting
"Orthogonal" and "Oblique" cutting
"Orthogonal" and "Straight" cutting
48 What device is used for holding and rotating a hollow piece of work that has been previously drilled or bored?
Collet chuck
Mandrel
Lathe centre
Catch plate
49 In metric standard, reciprocal of circular pitch of spur gear is described as
Addendum
Dedendum
Module
Backlash
50 Study the following statements:
A -Tailstock of Engine-Lathe is replaced by turret in huret lathe
B -Turret lathe is used for small precision jobs
C -Turret lathe can be tape controlled
A and B are true
A and C are true
B and C are true
All are true
51 A method of grinding external cylindrical surfaces, in which the work is supported among a regulating wheel, grinding wheel and a work rest blade, is known as
Snagging grinding
Cylindrical grinding
Centreless grinding
Form grinding
52 Small internal gear teeth are cut in one operation by a tool having a number of cutting edges equal to the number of teeth on the gear. Name the tool.
Milling tool
Hobbing tool
Broaching tool
Reaming tool
53 The device, used for dividing the periphery of the gear blank into a desired number of equal parts, is
Combination head
Dividing head
Multiple head
Periphery head
54 It is essential to do annealing and pickling, after performing
drilling
grinding
metal spinning
broaching
55 The number of collars are provided to carry a fixed axial load in a flat collar bearing
to reduce frictional torque
to increase frictional torque
to increase intensity of pressure
to decrease intensity of pressure
56 For the same pitch, the efficiency of screw jack with square threads is
more than that with V-threads
less than that with V-threads
same as that with V-threads
dependent only on the load on the jack
57 The friction acting on body while in motion, is called
Static friction
Dry static friction
Dynamic friction
Static and dynamic friction
58 Hartnell governor i.e;
Spring-loaded type governor
Dead-weight-loaded type governor
Pendulum tnJe governor
Inertia governor
59 For the same mass of flywheel
the disc type flywheel is preferable
the rim type flywheel is preferable
preference will depend upon the type of the prime mover
any type is equally preferable
60 For the same maximum fluctuation energy of a flywheel, if the mean speed of rotation is more
the size of the flywheel is reduced
the size of the flywheel is increased
the size of the flywheel is not dependent on the speed and is unaffected
working is safer
61 Angular acceleration of a link AB is found by dividing the
centripetal component of acceleration of B relative to A by length AB
linear velocity of B relative to A by length AB
total acceleration of B relative to A by length AB
tangential component of acceleration of B relative to A by length AB
62 Kennedy's theorem states that, if three rigid links have plane motion, their instantaneous centres lie on
a triangle
a point
a straight line
none of the above
63 A bolt and nut forms
a hlrning pair
spherical pair
sliding pair
screw pair
64 The motion of a rotating shaft in foot step bearing, constitutes between the elements of a kinematic pair
successfully constrained motion
complctl'lv constrained motion
incompletely constrained motion
unsuccessfully constrained motion
65 A perfect fluid is
compressible and gaseous
a real fluid
incompressible and frictionless
one which obeys perfect gas laws
66 Continuity equation deals with the law of conservation of
mass
momentum
energy
none of the above
67 Select the correct statement.
Absolute pressure =(Gauge pressure Atmospheric pressure)
Gauge pressure =(Absolute pressure Atmospheric pressure)
Absolute pressure =(Atmospheric pressure Vacuum pressure)
Gauge pressure =(Atmospheric pressure Vacuum pressure)
68 All fluids exert
pressure in the direction of flow only
pressure in the direction of force of gravity
equal pressure in all directions
equal pressure only in y and z planes
69 A fluid is a substance that
always expands until it fills any container
is practically incompressible
cannot remain at rest under action of any shear force
cannot be subjected to shear force
70 A pump is a device which converts
hydraulic energy into mechanical energy
mechanical energy into hydraulic energy
kinetic energy into mechanical energy
none of the above
71 Governing of turbine means
head is kept constant under all conditions of working
the speed is kept constant under all conditions
the discharge is kept constant under all conditions
none of the above
72 The casing of a centrifugal pump is made spiral, so as
to reduce hydraulic losses
to convert kinetic energy into pressure energy
to convert pressure energy into kinetic energy
to facilitate priming
73 High head of water is required for
Francis turbine
Propeller turbine
Pelton wheel
Kaplan turbine
74 The relation between hydraulic efficiency mechanical efficiency and overall efficiency is
nh n0 x nm
n0 nh x nm
n0 (nm nh)
None of the above
75 The primary fuel used in nuclear power plant is
U235
U238
P239
P233
76 Which of the following is not a non-conventional energy source?
Solar energy
Wind energy
Coal
Bio-gas
77 Capital and generation cost of geothermal power plant is
more than those of nuclear power plant
more than those of steam power plant
more than those of hydel power plant
least among the types mentioned above
78 Standard value of the solar constant is
1353 W/m2
1353 kW/m2
1000 W/m2
1353 MW/m2
79 Direct energy conversion system include
Magnetohydrodynamic system
Geothermal system
Tidal power system
None of the above
80 Wind energy is actually put into use in Maharashtra at
Deogad
Pune
Nagpur
Mumbai
81 Which of the following is the most important commercial source of energy in India at present?
Solar energy
Oil
Coal
Uranium
82 The process of supplying the intake air to the engine cylinder, at a density greater than the density of surrounding atmospheric air, is known as
Supercharging
Scavenging
Detonation
None of the above
83 Energy may be defined as
A "push" or "pull"
The product of force and velocity
The capacity to do work
The product of mass_and acceleration
84 Which of the following is NOT a thermal prime mover?
Water turbine
Steam turbine
Gas turbine
Petrol engine
85 In a Theoretical Rankine cycle, expansion is assumed to be
polytropic
hyperbolic
isentropic
isothermal
86 for C.I. Engines, the compression ratio is in the range of
5 to 9
12 to 20
1 to 2
none of the above
87 A short chimney is provided for
Lancashire Boiler
Babcock and Wilcox Boiler
Locomotive Boiler
Cochran Boiler
88 The weight of the diesel engine, compared to similar petrol engine is
2 to 3 times greater
2 to 3 times smaller
almost equal
none of the above
89 Of the following four fuels, the highest calorific value is possessed by
Kerosene
Diesel
Petrol
Vegetableoil
90 The S.I. Engines are high speed engines with operating speeds in the range of
1000 to 2000 r.p.m.
3000 to 5000 r.p.m.
10000 to 12000 r.p.m
none of the above
91 When servicing an air cleaner, the filter element should be
washed in oil
washed in cleaning fluid
washed with water
replaced
92 The testing equipment which gives a very close approximation of a road test in garage is called
Engine dynamometer
Chassis dynamometer
Engine tester
Tachometer
93 Tar spots from a car body are removed by
Rubber brush and water
Soft sponge
Special cleaning agents
Soap containing agents
94 In the differential, the distance between adjacent meshing teeth in the driving and driven gear is called as
toe
heel
back lash
clearance
95 When the car is being lifted for servicing
never allow passengers to remain in a car
see all doors are closed
engage the mechanical lock, if available
all of the above
96 "Medium transport motor vehicle" means whose gross vehicle weight falls between
2000 to 4000 kg
4000 to 8000 kg
3000 to 6000 kg
6000 to 12000 kg
97 Change of residence has to be intimated to the registering authority by the owner
within 1 month
within 2 months
within 3 months
within 4 months
98 As per Motor Vehicle Act, in passenger vehicles, each passenger seat shall have approximate area in square millimetres.
420 x 420
440 x 440
460 x 460
480 x 480
99 If your car is involved in an accident and injured the person, then you should
report to the nearest police station and take the person to the hospital
need not report to the police station but make arrangement for admitting person to hospital
need not take the person to hospital but only report to the police station
take the person to the hospital and then report to the nearest police station
100 Road tax is dependent on the
vehicle weight
R.L.W.
passengers allowed (seating capacity)
permit obtained
All above are correct
are correct
are correct
alone is correct
101 A.R.A.I. is situated at
Ahmednagar
Mumbai
Nagpur
Pune
102 Which one of the following pairs is incorrect?
Bajaj Auto -Two wheelers and Three wheelers
Mahindra Mahindra -Jeeps and Tractors
Premier Automobiles -Petrol cars and Diesel cars
TELCO -Tractors and Trucks
103 Which of the following company is not engaged in the manufachue of tyres in India?
J.K.
M.R.F.
L T
Modi
104 P.c.R.A. is situated at
Baroda
Bhopal
Bhuvaneswar
Mumbai
105 Which is the Diesel engine vehicle?
Matiz
Maruti Gipsy
SlUno
Contessa
106 In Spark Ignition Engines, combustion completes in
six stages
three stages
four stages
eight stages
107 Octane Number is determined by comparing the performance of petrol with following hydrocarbons:
Iso Octane
Mixture of Normal Heptane and Iso Octane
Mixture of Methane and Ethane
Alpha Methyl Napthalene
108 The boiling range of Diesel Oil is
400°C to 550°C
200°C to 375°C
30°C to 200°C
600°C to 700°C
109 Valve face angle varies from
10° to 15°
5° to 8°
30° to 45°
60° to 75°
110 Relative efficiency is the ratio of
Brake Power to Indicated Power
Mechanical efficiency to Thermal efficiency
Actual thermal efficiency to Volumetric efficiency
Actual thermal efficiency to Air-standard efficiency
111 The cylinder liners are made by
Centrifugal casting
Moulding
Press-working
Forging
112 Generally valves are made from
Cast iron
Cast steel
Nickel chrome steel
Aluminium alloy
113 Spark plug gaps are required in the range of
0.02 to 0.6 mm
0.45 to 1.00 mm
0.90 to 2.00 mm
1.00 to 1.30 mm
114 Choke valve is used in carburettor
to supply chemically correct air fuel mixture
to supply rich air fuel mixture
to supply lean air fuel mixture
to supply oil and fuel mixture
115 The chemical equation of a complete combustion of petrol is
2 C6 H18 21 O2 12 CO2 18 H2O
2 C4 H8 12 O2 8 CO2 8 H2O
2 C8 H18 27 O2 16 CO2 18 H2O 2O2
2 C8 H18 25 O2 16 CO2 18 H2O
116 The term scavenging is associated with
Four-stroke cycle engines
Two stroke cycle engines
Steam engines
Gas turbines
117 To measure Brake Power of the Auto Engines following device is used.
Indicator
Dynamometer
Hydrometer
Watt meter
118 How do you get friction power for single cylinder constant speed diesel engine when only brake dynamometer and fuel measurement arrangements are available?
By Morse Test
By Motoring Test
By difference between I.P. and B.P.
By Willan's Line Method
119 In Multicylinder Auto Engines, heat converted into useful work is about
15 to 20 percent
25 to 45 percent
45 to 60 per cent
60 to 80 percent
120 Torque produced by the Auto Engine at 4000 r.p.m. is 4 NM. Torque that can be produced by the same engine at 6000 r.p.m. is
2NM
3NM
4NM
5NM
121 Modem Car Engine uses the following lubricating system:
Petrol-oil system
Pressurised lubricating system
Splash lubricating system
All above lubricating systems
122 Petrol engine is not starting due to
Rich mixture supplied
Lean mixture supplied
Spark plug electrode eaten
Defect in condenser
and are correct
and are correct
and are correct
and are correct
123 What is the location of the choke in the updraft carburettor
Between the throttle and intake manifold
Above the throttle
Below the throttle
None of the above
124 Engine cam shaft speed in four stroke Auto engine is
Double the speed of crank shaft
Equal to the speed of crank shaft
Half the crank shaft speed
Four times crank shaft speed
125 Method of Governing used in Diesel Engine is
Quality Governing
Hit and Miss Governing
Quantity Governing
Combined of all above Governing
126 While charging a battery, the temperature of the electrolyte should not exceed
48.8°C
51.6°C
54.4°C
73.8°C
127 Which one of the following applies to single plate clutch?
No. of driven plates No. of driving surfaces
One One
One Two
Two One
Two Two
128 Which one of the following gear box type uses friction cones to equalise the speed of the gears before engagement
Sliding mesh
Epicyclic
Crash type
Synchromesh
129 When small gear drives a larger gear in gear box of an automobile, the result is
increase in torque
reduced torque transmitted
increased speed
same speed but reduced torque
130 The universal joint in the propeller shaft is necessary to
provide an easy method to disconnect the drive line
carry engine torque to the drive wheels
reduce a smooth turning drive line
allow drive wheel suspension free movement
131 Which type of rear axle is best suited for heavy vehicles
Full floating axle
Quarter floating axle
Semi floating axle
Three quarter floating axle
132 When vehicle is cornering, the crown wheel is rotating at 400 rev/min. and the outer wheel is running at 420 rev/min, then the speed of the inner wheel of the final drive will be
420 rev/min
380 rev/min
400 rev/min
440 rev/min
133 The pistons in the front wheel cylinders as compared to those in rear wheel cylinders in hydraulic brake system are
larger
smaller
of the same size
none of the above
134 Operating of double dedutching is necessary for changing lower gear to
decrease the speed of lay-shaft
decrease the speed of main shaft
increase the speed of lay shaft
increase the speed of main shaft
135 As compared to drum brakes, disc brakes has
same resistance to fade
high resistance to fade
lower resistance to fade
no resistance to fade
136 The tilting of front wheel away from the vertical is known as
Castor
Camber
Toe-in
Toe-out
137 Which one of the following converts the rotary motion of steering wheel into a reciprocating motion?
Steering box
Track rod
Trackarm
Stub axle
138 The resistance of air while running a vehicle depends upon
Unladen weight of the vehicle
Kerb weight of the vehicle
Laden weight of the vehicle
Body shape of the vehicle
139 Which one of the following chassis-sections offers the highest resistance to torsion?
Channel
Tubular
Box
Flat
140 The tread pattern helps
for even wear of tyre
for positive grip and air-cooling of tyres
for increasing the beauty of tyre
for reducing the weight of tyre
141 The racing car uses smaller wheels because
it rolls at faster rate
it is more comfortable
it lowers the centre of gravity and larger steering lock angles
it looks good and as a fashion
142 The spring weight term used in automobile refer to
the weight of the part of vehicle springs
the weight of front, rear axle and tyres
the weight of the part of vehicle supported on the springs
the weight of the front and rear springs
143 The lay-out of vehicle shows
different parts used in vehicles
different components of chassis
different assemblies and parts of vehicles
shape, size and types of chassis
144 The wiper motor is of
series wound type
shunt wound type
series and shunt wound type
series and parallel wound type
145 The angle between the actual path and desired path of a vehicle is known as
camber angle
castor angle
slip angle
King pin angle
146 When fully charged, the specific gravity of acid in a battery is
0.74
1.00
1.18
1.28
147 Hard steering is due to
low tyre pressure
high speed of vehicle
worn out bearing of front wheels
stub axle bending
148 Hard shifting of gears is due to
leakage of oil from gear box
worn out splines on the main shaft
high speed
over loading
149 Noisy valve operation is due to
loose nuts and bolts of engine head
worn out head packing
worn out valve springs
wrongly adjusted tappet
150 Hard starting when engine is cold due to
cold atmosphere
less water in radiator
faulty choke operation
none of the above
Benson steam generator
Loeffler steam generator
Volex steam generator
none ofthese
2 Compression ratio for compressor is always
more than 1.0
less than 1.0
equal to 1.0
zero
3 Compressor capacity is expressed in
m3/kg
KW
KWh
m3/min
4 In a compressor, the clearance volume is kept minimum, because it affects
isothermal efficiency
compressor efficiency
volumetric efficiency
none of the above
5 The performance of a reciprocating compressor is expressed by
adiabatic work
isothermal work
isothermal work/indicated work
none of the above
6 Air conditioning controls
temperahrre only
humidity only
motion of air and humidity
All the above three factors
7 In a multi-stage compression with intercooling, work required is
reduced
increased
not changed
none of the above
8 In a double acting compressor, the air is compressed
in a single cylinder
in two cylinders
in two stages on one side
in a single cylinder on both sides
9 In a compressor, the volume of air sucked during the suction stroke is known as
free air delivered
swept volume
compressor capacity
none of the above
10 The ratio of delivery pressure to suction pressure of air is called
volumetric efficiency
expansion ratio
compression efficiency
compression ratio
11 In a two-stage air compressor, an intercooler is placed
before L.P. cylinder
after H.P. cylinder
in between L.P. and H.P. cylinder
none of the above
12 1 ton of refrigeration is the
mass of refrigerant flow per second
mass of refrigeration unit
rate of ice formed per second
heat extraction at a rate of 3.5 kJ per second
13 A house-hold refrigerator works on
vapour absorption cycle
vapour compression cycle
Carnot cycle
Bell-Coleman cycle
14 The voltage required to produce a spark between the spark points in spark plug is in the range
2 to 4 kV
5 to 5.5 kV
6 to 10 kV
12 to 15 kV
15 The ratio of heat extracted from refrigerant to work supply is called
coefficient of performance of heat pump
coefficient of performance of refrigerator
refrigeration efficiency
relative coefficient of performance
16 What is the refrigerant used in a house-hold refrigerator
Freon-22
Freon -11
Freon-12
NH3
17 Bell-Coleman cycle is a
reversed Camot cycle
reversed Joule cycle
reversed Otto cycle
none of the above
18 The C.O.P. of a one-ton VCC refrigerating machine is 3.5. The minimum power needed to run this machine would be
1.00 HP
1.00 KW
1.00 KWh
3.50 KW
19 A domestic refrigerator has an expansion device in the form of a/an
Automatic expansion valve
Hand operated expansion valve
Float valve
Capillary tubes
20 A package type Air conditioner has a capacity upto around
1 ton
100 tons
20 tons
none of the above
21 This reading will be the same in Centigrade and Fahrenheit temperature units.
100
-100
-40
40
22 Absolute humidity is defined as
Weight of water vapour present in unit volume of air
Weight of water vapour present in 1 Kg of air
Weight of moist air per m3 of volume
none of the above
23 The function of a governor of steam engine is to
save steam
control the speed
provide safety to the people around
maintain constant load on the engine
24 Humidostat is a device which is sensitive to
Moisture changes
Temperature changes
Moisture and temperature changes
None of the above
25 A steel rod of 20 mm diameter and 500 mm long is subjected to an axial pull of 30 kN. If E=2 x 105 N/mm2, the elongation of the rod will be
0.239 mm
0.0239 mm
0.00239 mm
23.9 mm
26 What is the strain in a bar having cross-section area 50 mm2 subjected to 10 kN axial load? Assume Young's Modulus as 2 x 105 N/mm2.
0.001
0.002
0.0001
0.01
27 If the end portion of a beam is extended beyond the support, it is known as
Cantilever beam
Continuous beam
Overhanging beam
Fixed beam
28 A rectangular section has 200 mm depth and 300 mm width. Determine Moment of Inertia about centroidal axis parallel to the width.
450 x 10^6 mm4
200 x 10^6 mm4
300 x 10^6 mm4
600 x 10^6 mm4
29 Section Modulus of a circular cross-section about its diameter is given as......
pi D4/16
pi D3/32
pi D4/32
pi D4/64
30 Deflection of a Cantilever beam, measured at its free end, subjected to uniform load intensity over a span is given as
=Young's Modulus; I =Moment of Inertia about Neutral axis)
wl4 EI
wl4 EI
wl4 EI
wl4 /16 EI
31 What is the slope at the fixed end of a cantilever beam, subjected to concentrated load at its free end
30°
90°
0°
None
32 Deflection at the centre of a simply supported beam, with uniformly distributed load per unit length over the entire span having modulus of elasticity "E" and Moment of Inertia is given as
33 Euler's Buckling load on a column of length with both ends hinged, is given as =Young's Modulus; I Moment of Inertia of Column Cross-section)
pi EI/ l2
pi EI/ l
pi2 EI l2
2pi2 EI /l2
34 Water main 800 mm in diameter contains water at a pressure load of 120 m. If density of water is 10000 determine the metal thickness with allowable tensile stress 24N/nun2.
10 nun
20 nun
24 nun
18 nun
35 Very thin grinding wheels are made with
Shellac bond
Rubber bond
Vitrified bond
Resinoid bond
36 What are the main raw materials required for production of pig iron?
Iron, coal and flux
Iron ore, coke and lime stone
Iron ore, cooking coal and flux
Iron ore, coal and dolomite
37 What are the main constituents of Babbitt metal used in industry
Copper-tin-antimony
Copper-tin-phosphorus
Copper-tin-nickel
Copper-zinc-nickel
38 Which metal is used for a wide variety of small components of electrical equipment, buses, ordinance work and belts, rods, tubes, etc.
Monel metal
Bell metal
Muntz metal
Gun metal
39 Which of the following is a chipless machining process?
Knurting
Metal spinning
Hobbing
Lapping
40 For which engineering purposes, uranium, thorium, plutonium, zirconium, beryllium, niobium and their alloys are primarily used
Electronic Engineering
Nuclear Engineering
Telecommunicalion Engineering
Computer Engineering
41 V-Ihich process of metal-working is simply a plastic deformation performed to change shape and dimensions by mechanical pressure?
ECM
EDM
Extrusion
Shaping
42 Tumbling is done to
remove blow holes
create hard surface
clean the casting
fill-up the blow holes
43 What is the temperature of metal in hot working process at which new grains are formed?
Below the recrystallisation temperature
Above the recrystallisation temperarure
At melting temperature
Above melting temperature
44 Withdrawal of the pattern from the sand of the mould, without breaking the mould, is possible by providing
shrinkage allowance
draft
rapping allowance
finish allowance
45 The process used for making large-diameter pipes, hollow propeller shafts or gun barrels, is
Centrifugal casting
Forging
Rolling
Die-casting
46 Which heat treatment is applied to remove stresses and improve the mechanical properties and increase machinability
Normalising
Hardening
Tempering
Annealing
47 What are the two basic ways of metal cutting using a single-point cutting tool and a multi-point cutting tool?
"Single" and "multi-direction" cutting
"Perpendicular" and "Oblique" cutting
"Orthogonal" and "Oblique" cutting
"Orthogonal" and "Straight" cutting
48 What device is used for holding and rotating a hollow piece of work that has been previously drilled or bored?
Collet chuck
Mandrel
Lathe centre
Catch plate
49 In metric standard, reciprocal of circular pitch of spur gear is described as
Addendum
Dedendum
Module
Backlash
50 Study the following statements:
A -Tailstock of Engine-Lathe is replaced by turret in huret lathe
B -Turret lathe is used for small precision jobs
C -Turret lathe can be tape controlled
A and B are true
A and C are true
B and C are true
All are true
51 A method of grinding external cylindrical surfaces, in which the work is supported among a regulating wheel, grinding wheel and a work rest blade, is known as
Snagging grinding
Cylindrical grinding
Centreless grinding
Form grinding
52 Small internal gear teeth are cut in one operation by a tool having a number of cutting edges equal to the number of teeth on the gear. Name the tool.
Milling tool
Hobbing tool
Broaching tool
Reaming tool
53 The device, used for dividing the periphery of the gear blank into a desired number of equal parts, is
Combination head
Dividing head
Multiple head
Periphery head
54 It is essential to do annealing and pickling, after performing
drilling
grinding
metal spinning
broaching
55 The number of collars are provided to carry a fixed axial load in a flat collar bearing
to reduce frictional torque
to increase frictional torque
to increase intensity of pressure
to decrease intensity of pressure
56 For the same pitch, the efficiency of screw jack with square threads is
more than that with V-threads
less than that with V-threads
same as that with V-threads
dependent only on the load on the jack
57 The friction acting on body while in motion, is called
Static friction
Dry static friction
Dynamic friction
Static and dynamic friction
58 Hartnell governor i.e;
Spring-loaded type governor
Dead-weight-loaded type governor
Pendulum tnJe governor
Inertia governor
59 For the same mass of flywheel
the disc type flywheel is preferable
the rim type flywheel is preferable
preference will depend upon the type of the prime mover
any type is equally preferable
60 For the same maximum fluctuation energy of a flywheel, if the mean speed of rotation is more
the size of the flywheel is reduced
the size of the flywheel is increased
the size of the flywheel is not dependent on the speed and is unaffected
working is safer
61 Angular acceleration of a link AB is found by dividing the
centripetal component of acceleration of B relative to A by length AB
linear velocity of B relative to A by length AB
total acceleration of B relative to A by length AB
tangential component of acceleration of B relative to A by length AB
62 Kennedy's theorem states that, if three rigid links have plane motion, their instantaneous centres lie on
a triangle
a point
a straight line
none of the above
63 A bolt and nut forms
a hlrning pair
spherical pair
sliding pair
screw pair
64 The motion of a rotating shaft in foot step bearing, constitutes between the elements of a kinematic pair
successfully constrained motion
complctl'lv constrained motion
incompletely constrained motion
unsuccessfully constrained motion
65 A perfect fluid is
compressible and gaseous
a real fluid
incompressible and frictionless
one which obeys perfect gas laws
66 Continuity equation deals with the law of conservation of
mass
momentum
energy
none of the above
67 Select the correct statement.
Absolute pressure =(Gauge pressure Atmospheric pressure)
Gauge pressure =(Absolute pressure Atmospheric pressure)
Absolute pressure =(Atmospheric pressure Vacuum pressure)
Gauge pressure =(Atmospheric pressure Vacuum pressure)
68 All fluids exert
pressure in the direction of flow only
pressure in the direction of force of gravity
equal pressure in all directions
equal pressure only in y and z planes
69 A fluid is a substance that
always expands until it fills any container
is practically incompressible
cannot remain at rest under action of any shear force
cannot be subjected to shear force
70 A pump is a device which converts
hydraulic energy into mechanical energy
mechanical energy into hydraulic energy
kinetic energy into mechanical energy
none of the above
71 Governing of turbine means
head is kept constant under all conditions of working
the speed is kept constant under all conditions
the discharge is kept constant under all conditions
none of the above
72 The casing of a centrifugal pump is made spiral, so as
to reduce hydraulic losses
to convert kinetic energy into pressure energy
to convert pressure energy into kinetic energy
to facilitate priming
73 High head of water is required for
Francis turbine
Propeller turbine
Pelton wheel
Kaplan turbine
74 The relation between hydraulic efficiency mechanical efficiency and overall efficiency is
nh n0 x nm
n0 nh x nm
n0 (nm nh)
None of the above
75 The primary fuel used in nuclear power plant is
U235
U238
P239
P233
76 Which of the following is not a non-conventional energy source?
Solar energy
Wind energy
Coal
Bio-gas
77 Capital and generation cost of geothermal power plant is
more than those of nuclear power plant
more than those of steam power plant
more than those of hydel power plant
least among the types mentioned above
78 Standard value of the solar constant is
1353 W/m2
1353 kW/m2
1000 W/m2
1353 MW/m2
79 Direct energy conversion system include
Magnetohydrodynamic system
Geothermal system
Tidal power system
None of the above
80 Wind energy is actually put into use in Maharashtra at
Deogad
Pune
Nagpur
Mumbai
81 Which of the following is the most important commercial source of energy in India at present?
Solar energy
Oil
Coal
Uranium
82 The process of supplying the intake air to the engine cylinder, at a density greater than the density of surrounding atmospheric air, is known as
Supercharging
Scavenging
Detonation
None of the above
83 Energy may be defined as
A "push" or "pull"
The product of force and velocity
The capacity to do work
The product of mass_and acceleration
84 Which of the following is NOT a thermal prime mover?
Water turbine
Steam turbine
Gas turbine
Petrol engine
85 In a Theoretical Rankine cycle, expansion is assumed to be
polytropic
hyperbolic
isentropic
isothermal
86 for C.I. Engines, the compression ratio is in the range of
5 to 9
12 to 20
1 to 2
none of the above
87 A short chimney is provided for
Lancashire Boiler
Babcock and Wilcox Boiler
Locomotive Boiler
Cochran Boiler
88 The weight of the diesel engine, compared to similar petrol engine is
2 to 3 times greater
2 to 3 times smaller
almost equal
none of the above
89 Of the following four fuels, the highest calorific value is possessed by
Kerosene
Diesel
Petrol
Vegetableoil
90 The S.I. Engines are high speed engines with operating speeds in the range of
1000 to 2000 r.p.m.
3000 to 5000 r.p.m.
10000 to 12000 r.p.m
none of the above
91 When servicing an air cleaner, the filter element should be
washed in oil
washed in cleaning fluid
washed with water
replaced
92 The testing equipment which gives a very close approximation of a road test in garage is called
Engine dynamometer
Chassis dynamometer
Engine tester
Tachometer
93 Tar spots from a car body are removed by
Rubber brush and water
Soft sponge
Special cleaning agents
Soap containing agents
94 In the differential, the distance between adjacent meshing teeth in the driving and driven gear is called as
toe
heel
back lash
clearance
95 When the car is being lifted for servicing
never allow passengers to remain in a car
see all doors are closed
engage the mechanical lock, if available
all of the above
96 "Medium transport motor vehicle" means whose gross vehicle weight falls between
2000 to 4000 kg
4000 to 8000 kg
3000 to 6000 kg
6000 to 12000 kg
97 Change of residence has to be intimated to the registering authority by the owner
within 1 month
within 2 months
within 3 months
within 4 months
98 As per Motor Vehicle Act, in passenger vehicles, each passenger seat shall have approximate area in square millimetres.
420 x 420
440 x 440
460 x 460
480 x 480
99 If your car is involved in an accident and injured the person, then you should
report to the nearest police station and take the person to the hospital
need not report to the police station but make arrangement for admitting person to hospital
need not take the person to hospital but only report to the police station
take the person to the hospital and then report to the nearest police station
100 Road tax is dependent on the
vehicle weight
R.L.W.
passengers allowed (seating capacity)
permit obtained
All above are correct
are correct
are correct
alone is correct
101 A.R.A.I. is situated at
Ahmednagar
Mumbai
Nagpur
Pune
102 Which one of the following pairs is incorrect?
Bajaj Auto -Two wheelers and Three wheelers
Mahindra Mahindra -Jeeps and Tractors
Premier Automobiles -Petrol cars and Diesel cars
TELCO -Tractors and Trucks
103 Which of the following company is not engaged in the manufachue of tyres in India?
J.K.
M.R.F.
L T
Modi
104 P.c.R.A. is situated at
Baroda
Bhopal
Bhuvaneswar
Mumbai
105 Which is the Diesel engine vehicle?
Matiz
Maruti Gipsy
SlUno
Contessa
106 In Spark Ignition Engines, combustion completes in
six stages
three stages
four stages
eight stages
107 Octane Number is determined by comparing the performance of petrol with following hydrocarbons:
Iso Octane
Mixture of Normal Heptane and Iso Octane
Mixture of Methane and Ethane
Alpha Methyl Napthalene
108 The boiling range of Diesel Oil is
400°C to 550°C
200°C to 375°C
30°C to 200°C
600°C to 700°C
109 Valve face angle varies from
10° to 15°
5° to 8°
30° to 45°
60° to 75°
110 Relative efficiency is the ratio of
Brake Power to Indicated Power
Mechanical efficiency to Thermal efficiency
Actual thermal efficiency to Volumetric efficiency
Actual thermal efficiency to Air-standard efficiency
111 The cylinder liners are made by
Centrifugal casting
Moulding
Press-working
Forging
112 Generally valves are made from
Cast iron
Cast steel
Nickel chrome steel
Aluminium alloy
113 Spark plug gaps are required in the range of
0.02 to 0.6 mm
0.45 to 1.00 mm
0.90 to 2.00 mm
1.00 to 1.30 mm
114 Choke valve is used in carburettor
to supply chemically correct air fuel mixture
to supply rich air fuel mixture
to supply lean air fuel mixture
to supply oil and fuel mixture
115 The chemical equation of a complete combustion of petrol is
2 C6 H18 21 O2 12 CO2 18 H2O
2 C4 H8 12 O2 8 CO2 8 H2O
2 C8 H18 27 O2 16 CO2 18 H2O 2O2
2 C8 H18 25 O2 16 CO2 18 H2O
116 The term scavenging is associated with
Four-stroke cycle engines
Two stroke cycle engines
Steam engines
Gas turbines
117 To measure Brake Power of the Auto Engines following device is used.
Indicator
Dynamometer
Hydrometer
Watt meter
118 How do you get friction power for single cylinder constant speed diesel engine when only brake dynamometer and fuel measurement arrangements are available?
By Morse Test
By Motoring Test
By difference between I.P. and B.P.
By Willan's Line Method
119 In Multicylinder Auto Engines, heat converted into useful work is about
15 to 20 percent
25 to 45 percent
45 to 60 per cent
60 to 80 percent
120 Torque produced by the Auto Engine at 4000 r.p.m. is 4 NM. Torque that can be produced by the same engine at 6000 r.p.m. is
2NM
3NM
4NM
5NM
121 Modem Car Engine uses the following lubricating system:
Petrol-oil system
Pressurised lubricating system
Splash lubricating system
All above lubricating systems
122 Petrol engine is not starting due to
Rich mixture supplied
Lean mixture supplied
Spark plug electrode eaten
Defect in condenser
and are correct
and are correct
and are correct
and are correct
123 What is the location of the choke in the updraft carburettor
Between the throttle and intake manifold
Above the throttle
Below the throttle
None of the above
124 Engine cam shaft speed in four stroke Auto engine is
Double the speed of crank shaft
Equal to the speed of crank shaft
Half the crank shaft speed
Four times crank shaft speed
125 Method of Governing used in Diesel Engine is
Quality Governing
Hit and Miss Governing
Quantity Governing
Combined of all above Governing
126 While charging a battery, the temperature of the electrolyte should not exceed
48.8°C
51.6°C
54.4°C
73.8°C
127 Which one of the following applies to single plate clutch?
No. of driven plates No. of driving surfaces
One One
One Two
Two One
Two Two
128 Which one of the following gear box type uses friction cones to equalise the speed of the gears before engagement
Sliding mesh
Epicyclic
Crash type
Synchromesh
129 When small gear drives a larger gear in gear box of an automobile, the result is
increase in torque
reduced torque transmitted
increased speed
same speed but reduced torque
130 The universal joint in the propeller shaft is necessary to
provide an easy method to disconnect the drive line
carry engine torque to the drive wheels
reduce a smooth turning drive line
allow drive wheel suspension free movement
131 Which type of rear axle is best suited for heavy vehicles
Full floating axle
Quarter floating axle
Semi floating axle
Three quarter floating axle
132 When vehicle is cornering, the crown wheel is rotating at 400 rev/min. and the outer wheel is running at 420 rev/min, then the speed of the inner wheel of the final drive will be
420 rev/min
380 rev/min
400 rev/min
440 rev/min
133 The pistons in the front wheel cylinders as compared to those in rear wheel cylinders in hydraulic brake system are
larger
smaller
of the same size
none of the above
134 Operating of double dedutching is necessary for changing lower gear to
decrease the speed of lay-shaft
decrease the speed of main shaft
increase the speed of lay shaft
increase the speed of main shaft
135 As compared to drum brakes, disc brakes has
same resistance to fade
high resistance to fade
lower resistance to fade
no resistance to fade
136 The tilting of front wheel away from the vertical is known as
Castor
Camber
Toe-in
Toe-out
137 Which one of the following converts the rotary motion of steering wheel into a reciprocating motion?
Steering box
Track rod
Trackarm
Stub axle
138 The resistance of air while running a vehicle depends upon
Unladen weight of the vehicle
Kerb weight of the vehicle
Laden weight of the vehicle
Body shape of the vehicle
139 Which one of the following chassis-sections offers the highest resistance to torsion?
Channel
Tubular
Box
Flat
140 The tread pattern helps
for even wear of tyre
for positive grip and air-cooling of tyres
for increasing the beauty of tyre
for reducing the weight of tyre
141 The racing car uses smaller wheels because
it rolls at faster rate
it is more comfortable
it lowers the centre of gravity and larger steering lock angles
it looks good and as a fashion
142 The spring weight term used in automobile refer to
the weight of the part of vehicle springs
the weight of front, rear axle and tyres
the weight of the part of vehicle supported on the springs
the weight of the front and rear springs
143 The lay-out of vehicle shows
different parts used in vehicles
different components of chassis
different assemblies and parts of vehicles
shape, size and types of chassis
144 The wiper motor is of
series wound type
shunt wound type
series and shunt wound type
series and parallel wound type
145 The angle between the actual path and desired path of a vehicle is known as
camber angle
castor angle
slip angle
King pin angle
146 When fully charged, the specific gravity of acid in a battery is
0.74
1.00
1.18
1.28
147 Hard steering is due to
low tyre pressure
high speed of vehicle
worn out bearing of front wheels
stub axle bending
148 Hard shifting of gears is due to
leakage of oil from gear box
worn out splines on the main shaft
high speed
over loading
149 Noisy valve operation is due to
loose nuts and bolts of engine head
worn out head packing
worn out valve springs
wrongly adjusted tappet
150 Hard starting when engine is cold due to
cold atmosphere
less water in radiator
faulty choke operation
none of the above