Automobile Engineering Questions and Answers for ITI Jobs
1. The unit of temperature in SI unit is:
(A) Kilogram
(B) Kelvin
(C) Centigrade
(D) Celsius
2. Crank case dilution is:
(A) Dilution of lubricating oil
(B) Dilution of diesel in crank case
(C) Addition of water in crank ease
(D) None of these
3. The top ring on the piston is known as:
(A) Ring grove
(B) Oil ring
(C) Compression ring
(D) Scrapper ring
4. The purpose of Feeler gauge is:
(A) Measuring the small gap
(B) Measuring the diameter of a cylinder
(C) Measuring the length of a rod
(D) Measuring length of a beam
5. Viscosity of the oil is the measure of it’s:
(A) Resistance flow
(B) Temperature flow
(C) Velocity flow
(D) Current flow
6. The voltage per cell in a lead acid battery is:
(A) 1 volt
(B) 8 volt
(C) 1.5 volt
(D) 2 volt
7. The chamber angle is usually:
(A) 1/4″
(B) Between 1″ to 3″
(C) Between 1/2″ to 2″
(D) Between 4″ to 6″
8. The cylinder block of heavy engine is made of:
(A) High carbon steel
(B) Cast iron
(C) Nickel or chromium steel
(D) Medium carbon steel
9. Ohms law relates potential difference with:
(A) Time
(B) Current
(C) Voltage
(D) Power
10. The standard firing order for an in-line 6 cylinder IC engine is:
(A) 1-5-3-6-2-4
(B) 1-6-5-4-2-3
(C) 1-3-5-4-2-6
(D) 1 -4-5-2-3-6
11. The dynamo in an automobile is basically:
(A) DC generator
(B) Resistance
(C) Transformer
(D) All of the above
12. The knocking tendency of spark ignition engine is reduced by:
(A) Advancing ignition timing
(B) High compression ratio
(C) how exhaust gas temperature
(D) Adding dope like tetra ethy lead to the fuel
13. The gear ratio of camshaft and crankshaft is:
(A) 1:1
(B) 1:6
(C) 1:2
(D) 1:8
14. The maximum temperature in the IC engine cylinder is:
(A) 700 – 1200°C
(B) 2000 – 2500°C
(C) 1000 – 1500°C
(D) 1500 – 2000°C
15. Which in more viscous lubricating oil?
(A) SAE 50
(B) SAE 70
(C) SAE 40
(D) SAE 90
16. Scavenging is usually done to increase:
(A) Thermal efficiency
(B) Lees fuel consumption
(C) Speed of the engine
(D) Power output
17. All the four wheel drive automobiles has:
(A) Water cooled engine
(B) Air cooled engine
(C) Four stroke engine
(D) Two differentials
18. The radiator in usually made of:
(A) Bronze
(B) Cast iron
(C) Steel
(D) Copper
19. Air standard efficiency of an IC engine depends on:
(A) Compression ratio
(B) Fuel used
(C) Velocity ratio
(D) Power ratio
20. The materials used for cylinder head are generally:
(A) Alluminium
(B) High carbon steel
(C) Mild steel
(D) Cast iron
21. Which law states that pressure remaining constant the volume of a fixed mass of gas is directly proportional to it’s absolute temperature?
(A) Boyle’s law
(B) Charle’s law
(C) Regnnult‘s law
(D) Joule’s law
22. The air fuel ratio of petrol engine is controlled by:
(A) Fuel injection pump
(B) Governer
(C) Injector
(D) Carburettor
23. ___________ tool is used for lightening the nuts and bolt with a specified torque.
(A) Adjustable wrench
(B) Torque wrench
(C) Pipe wrench
(D) Tubular spanner
24. The volume sept by the piston in moving from TDC to BDC is called:
(A) Piston displacement
(B) Clearance volume
(C) Engine capacity
(D) Total volume
25. The total piston displacement of all the engine cylinders is:
(A) Engine capacity
(B) Valve capacity
(C) Fuel tank capacity
(D) Rocker arm capacity
26. A smoky blue exhaust is due to:
(A) incorrect valve adjustment
(B) incorrect tappet adjustment
(C) burning of oil in combustion chamber
(D) rich mixture in the combustion chamber
27. Engine torque is transmitted to the gear box through:
(A) Gear box
(B) Belt
(C) Chain
(D) Clutch
28. Speedometer drive is usually taken from:
(A) Fan belt
(B) Rear wheel
(C) Dynamo
(D) Front wheel
29. Free clutch pedal play in car clutches is about:
(A) 10 mm
(B) 60 mm
(C) 90 mm
(D) 30 mm
30. The specific gravity for fully charged lead acid battery is:
(A) 1.160 – 1.160
(B) 1.175 – 1.185
(C) 1.125 – 1.135
(D) 1.220 – 1.230
31. The bellows type valve, the bellows are filled with liquid such as:
(A) kerosene
(B) diesel
(C) oil
(D) alcohol or acetone
32. A compressed air break system is a type of:
(A) mechanical brake
(B) hand brake
(C) vacuum assisted brake
(D) friction brake
33. Multi oil indicate:
(A) SAE 20W-50
(B) SAE 120
(C) SAE 90
(D) APISF
34. The coil spring in wish bone suspension placed between the:
(A) Upper wish bone and the cross member
(B) Shock absorber and the cross member
(C) Lower wish bone and the cross member
(D) Three wish bones
35. The packing brake generally acts on:
(A) Propeller shaft
(B) Rear wheels
(C) Front wheels
(D) Front and rear wheel
36. The rating of diesel fuel is given by:
(A) 1.5
(B) octane number
(C) cetane number
(D) 2PLN
37. The central gear of an epi cyclic gear set is called a:
(A) Internal gear
(B) Ring gear
(C) Planet gear
(D) Sun gear
38. The torque increased in a vehicle obtained by:
(A) Decreasing power
(B) Decreasing fuel consumption
(C) Decreasing speed
(D) Increasing fuel consumption
39. The condition that causes vapour locking in a brake system:
(A) An excessively high engine speed on a downhill road
(B) Over cooling of the brake during high speed driving
(C) Keeping the vehicle without use for an extended period
(D) Overheating of the fluid due to frequent brake application
40. The oil pump is driven by the:
(A) cam shaft
(B) main shaft
(C) primary shaft
(D) crank shaft directly
41. Less or uneven pressure of air in the wheels shall result in:
(A) smooth steering
(B) front axle shifted
(C) hard steering
(D) loose tie rod
42. The oil or fluid used in torque converter is:
(A) SAE – 90
(B) SAE 30-40
(C) Mineral oil
(D) Brake oil
43. Valve ring compressor is used to ___________ the valve springs while removing or installing the engine valve.
(A) Depress
(B) Compress
(C) Brittleneas
(D) Toughness
44. The fully charged buttery is brought to a temperature of:
(A) 90°F
(B) 45°C
(C) 120°F
(D) 80°F
45. The transmission in which various speeds are obtained automatically are known as:
(A) Constant power transmission
(B) High torque transmission
(C) Low speed transmission
(D) Automatic transmission
46. The rotary motion of the crank shaft is in turn used to drive the ____________ for generating power.
(A) Motor
(B) Transformer
(C) Engine
(D) Generator
47. Baffles are provided on engine to:
(A) Reduce fuel consumption
(B) Improve engine performance
(C) Improve heat transfers rate
(D) Reduce the knocking effect
48. Which of the following statement is true statement?
(A) Heavier fly wheel is needed in two stroke engine
(B) Lighter flywheel is needed in four stroke engine
(C) Low thermal efficiency in four stroke engine
(D) Volumetric efficiency is less in two stroke engine
49. The tacometer is used to measure the:
(A) Engine oil viscosity
(B) Engine compression
(C) Engine temperature
(D) Engine rpm
50. During combustion, fuel and water particles escape from the combustion chamber into the crank chamber, which dilute the lubricating oil contained in the oil sump is known as:
(A) Crank case dilution
(B) Crank case burning
(C) Crank case explosion
(D) Crank case ventilation
51. The order or sequence in which the firing takes place in different cylinders of a multi cylinder engine is called:
(A) Air-fuel ratio
(B) Power ratio
(C) Fuel ratio
(D) Firing order
52. When the top of the wheel is fitted inward, then it is called:
(A) Kins pin inclination
(B) Positive camber
(C) Caster angle
(D) Negative camber
53. The main function of a suspension is to:
(A) Correct the effect of steering automatically
(B) Wheel alignment is not distributed during driving
(C) Steering wheel can driven a suitable amount of steering force
(D) Absorb vibration and impact forces from the road surface
54. The type of rear axle used in a car and light commercial vehicles are:
(A) Semi-floating axle
(B) Full floating axle
(C) Three-quarter floating axle
(D) None of these
55. The function of gear box in an automobile is to:
(A) Vary speed
(B) Vary torque
(C) To disconnect the road wheels from the engine when desired
(D) Permanent speed reduction
56. Which instrument in used to measure specific gravity?
(A) Hydrometer
(B) Thermometer
(C) Barometer
(D) Taoometer
57. _________ are provided in the clutch smooth engagement.
(A) Coil spring
(B) Cauhion spring
(C) Torsion spring
(D) Spring basic disc
58. A ring gear is provided around the engine flywheel:
(A) To start the engine using self starter
(B) To operate the valves
(C) To maintain better engine speed
(D) To maintain the water pump speed
59. __________ serves to adjust the length of the propeller shaft when demanded by the rear axle movement.
(A) Universal joint
(B) Cap joints
(C) Corner joint
(D) Slip joint
60. The torque available at the contact between wheels and rod is:
(A) Tractive effect
(B) Gear effect
(C) Brake effect
(D) axle effect
61. The Rear wheels should follow in the tracks of front wheels in a parallel position is called
(A) Turning radius
(B) Uniform motion of wheel
(C) Negotiating turn
(D) Tracking
62. Which of the following is false statement?
(A) Thermal efficiency is low in petrol engine
(B) Thermal efficiency is high in diesel engine
(C) Petrol engine works on constant volume cycle
(D) Compression ratio varies from 6.1 to 9.1 in Diesel engine
63. The basic frame work of an engine is:
(A) cylinder head
(B) cylinder block
(C) oil sump
(D) connecting rod
64. The oil sump is made of:
(A) cast iron
(B) zinc sheet
(C) alluminium alloy
(D) pressed steel sheet
65. While smoke from a diesel engine can be expected during:
(A) Start up or idling
(B) High load operation
(C) High Speed operation
(D) All of the above
66. The term BTDC stands for:
(A) Below Top Dead Centre
(B) Before Top Dead Centre
(C) Back Top Dead Centre
(D) Balance Top Dead Centre
67. The advantages of tube less tyre over tube type tyre is:
(A) slow air leakage
(B) chances of running flat is less
(C) better fuel efficiency
(D) all of these
68. Differential gear box oil is usually renewed after:
(A) 6000 km
(B) 4000 km
(C) 1500 km
(D) 2500-6000 km
69. An over inflated tyre will wear the tread moat near the:
(A) Centre
(B) Corner
(C) Edges
(D) none of these
70. Piston, compression rings and made of:
(A) spring steel
(B) Alluminium
(C) copper alloy
(D) cast iron
71. The power to be transmitted to the road wheels at varied lengths and varied angles is:
(A) axle shaft
(B) primary shall
(C) bevel shaft
(D) propeller shaft
72. In an automobile the wheels convert rotary motion into:
(A) Reciprocating motion
(B) Downward motion
(C) Upward motion
(D) Longitudinal one
73. For maximum engine speed and power, additional fuel must be supplied ________ in providing additional fuel for maximum power.
(A) chock valve
(B) Throttle valve
(C) Additional nozzle
(D) Economizer valve
74. In otto cycle engines the knocking tendency is reduced by:
(A) Adding dope like tetraethy load to the fuel
(B) High exhaust temperature
(C) Less compression ratio
(D) High compression ratio
75. Bendix drive is generally known as:
(A) Front axle drive
(B) Rear axle drive
(C) Bendix gear drive
(D) Inertia drive
76. The front and rear wheel, tyre pressure of Ambassador car is:
(A) 15 psi – 18 psi
(B) 20 psi – 25 psi
(C) 24 psi – 25 psi
(D) 26 psi – 28 psi
77. Brake bleeding is the process of removing ___________ from the system.
(A) Brake oil
(B) Air
(C) Vacuum
(D) Excess pressure
78. ____________ is the conventional material for engine cylinder heads and block
(A) Alluminium
(B) Steel
(C) Vacuum
(D) Cast iron
79. The type of wheels preferred in sport vehicles are:
(A) Wire wheel
(B) Copper alloy wheel
(C) Alluminium alloy wheel
(D) Disc wheel
80. In modern car the head light dimming switch is mounted on the:
(A) Dash board
(B) Steering column
(C) Side board
(D) Flour board
81. Pick out the odd one from the following:
(A) cylinder block
(B) crank shaft
(C) crank case
(D) cylinder head
82. In an engine the temperature of the piston will be more at:
(A) the crown of the piston
(B) the piston walls
(C) the skirt of the piston
(D) the land of the piston
83. Which part is not common between the petrol and diesel engines?
(A) Air cleaner
(B) Crank shaft
(C) Silencer
(D) Spark plug
84. The firing order of a four cylinder inline engine is usually:
(A) 1-2-3-4
(B) 1-3-4-2
(C) 1-2-4-3
(D) 4-1-2-3
85. The device for smoothing out the power impulses from the engine:
(A) crank shaft
(B) clutch
(C) flywheel
(D) shock absorber
86. Which vehicle is provided with single wheel drive?
(A) Tractor
(B) Motor cycle
(C) Truck
(D) Car
87. Engine alternator is driven by:
(A) V-belt drive
(B) Gear drive
(C) Flat belt drive
(D) Chain drive
88. The least count of a inside micrometer is:
(A) 0.02 mm
(B) 1 mm
(C) 0.01 mm
(D) 0.001 mm
89. An engine running in closed garage is dangerous because the exhaust gas contains
(A) water vapour
(B) carbon dioxide
(C) air
(D) carbon monoxide
90. To lighten nuts or bolts accurately, use:
(A) ring spanner
(B) open jaw spanner
(C) torque wrench
(D) combination wrench
91. To cut threads in a hole, use a:
(A) Die
(B) stud extractor
(C) tap
(D) reamer
92. Before you work under a car, make sure that:
(A) the tires are inflated
(B) use a creeper
(C) the car is supported on safety stands
(D) the car is supported on hydraulic jack
93. The component which adjust the length of the propeller shaft according to the movement of the rear axle:
(A) universal joint
(B) slip joint
(C) constant velocity joint
(D) lap joint
94. The instrument used for measuring the specific gravity of electrolyte in a battery
(A) cell tester
(B) voltmeter
(C) hydrometer
(D) thermometer
95. The stroke of an engine in which the exhaust valve is fully closed:
(A) suction
(B) compression
(C) power
(D) exhaust
96. Grade of the lubricating oil used in differential unit:
(A) SAE30
(B) SAE 140
(C) SAE90
(D) SAE40
97. Number of sparks required in one minute for a 4 stroke 4 cylinder petrol engine working at 3000 RPM:
(A) 6000
(B) 3000
(C) 1500
(D) 750
98. Find out the odd one from the following:
(A) Master cylinder
(B) Engine cylinder
(C) Wheel cylinder
(D) Brake drum
99. The property of lubricating oil to resist flow is called:
(A) Viscosity
(B) flash point
(C) pore point
(D) fire point
100. Shape of head lamp reflector of vehicles:
(A) spherical
(B) hyperbolic
(C) convex
(D) parabolic
101. Type of clutch used in motor cycle:
(A) single plate
(B) multiplate
(C) diaphragm
(D) centrifugal
102. Which one of the following engine part is made of aluminium alloy?
(A) crank shaft
(B) piston rings
(C) connecting rod
(D) piston
103. What type of fuel feed system is used in two wheelers?
(A) Pump feed system
(B) Pressure feed system
(C) Gravity feed system
(D) Thermo syphon system
104. Hydraulic brakes work on the principle of:
(A) Pascal’s law
(B) Newton’s law
(C) Faraday’s law
(D) All of the above
105. When the air pass through the air horn of the carburettor:
(A) pressure decreased in the venturi
(B) pressure increased in the venturi
(C) temperature increased in the venturi
(D) pressure and temperature increased in the venturi
106. Air cooled engines are fitted in which vehicles?
(A) Trucks
(B) Cars
(C) Air bus
(D) Scooters
107. While starting an engine, the starter motor pinion meshes with:
(A) Clutch
(B) gearbox top gear
(C) flywheel ring gear
(D) differential sun gear
108. A 4 cylinder engine has u capacity of 1.2 Litres. The swept volume of one cylinder is:
(A) 1200 cm3
(B) 600 cm3
(C) 300 cm3
(D) 150 cm3
109. If the air fuel mixture ignites before the spark occurs at the spark plug, this condition is called:
(A) Detonation
(B) Ignition
(C) Vaporisation
(D) Pre ignition
110. In turbo charged engines, the turbo charger is driven by:
(A) Belt from the engine crank shaft
(B) Belt from the engine cam shaft
(C) The force of the intake air
(D) The force of the exhaust gas
111. Injector is not located in:
(A) Crank case
(B) Cylinder head
(C) Induction manifold
(D) Intake port
112. A constant velocity universal joint is used at the:
(A) Front end of the propeller shaft
(B) Rear end of the propeller shaft
(C) Differential end of the axle shaft on front wheel drive vehicle
(D) Road wheel end of the axle shaft on front wheel drive vehicle
113. The crown wheel and pinion is called the
(A) Final drive
(B) Differential
(C) Rear housing
(D) Rear drive
114. The purpose of a thermostat in an engine cooling system is to:
(A) Prevent the coolant from boiling
(B) Indicate to the driver the coolant temperature
(C) Raise the boiling point of coolant
(D) Allow the engine to warm up quickly
115. In which engine stroke, the pressure in the cylinder is less than atmospheric pressure?
(A) Suction
(B) Compression
(C) Power
(D) Exhaust
116. The sealed beam headlight bulb consists of:
(A) two filament
(B) one filament
(C) three filament
(D) none of the above
117. Two types of oil pumps are generally used. They are:
(A) Gear and Diaphram
(B) Vaocum and pressure
(C) Rotor and gear
(D) Rotor and electric
118. The clearance between the valve and rocker arm is measured by using:
(A) inside micrometer
(B) feeler gauge
(C) wire gauge
(D) outside micrometer
119. The device used to reduce the exhaust noise is known as:
(A) exhaust manifold
(B) muffler
(C) tail pipe
(D) exhaust pipe
120. In case of Trucks, the suspension springs provided on rear wheels are:
(A) coil spring
(B) torsion bar
(C) leaf spring
(D) leaf spring and coil spring
121. Valve overlap means:
(A) early opening of inlet valve
(B) early opening of exhaust valve
(C) both valves are closed
(D) both valves are open
122. The camshaft rotates at:
(A) same speed as the crank shaft
(B) half the speed of crank shaft
(C) twice the speed of crank shaft
(D) none of the above
123. In diesel engine, the fuel is ignited by:
(A) the heat of compressed hot air
(B) the hot exhaust gas
(C) an electric spark
(D) all the above
124. Aluminium cylinder blocks require:
(A) cast iron liners
(B) aluminium liners
(C) brass liners
(D) no liners
125. Wheel base of a vehicle is the:
(A) distance between the front tyres
(B) distance between the front and rear axles
(C) total length of the vehicle
(D) none of the above
126. The capacity of a battery is usually expressed in terms of:
(A) Volts
(B) ampere hours
(C) watts
(D) none of the above
127. Which air cleaner is mostly used in diesel engines?
(A) dry type
(B) paper pleated type
(C) wet type
(D) oil bath type
128. Temperature gauge indicates the temperature of:
(A) Lubricating oil
(B) Engine piston
(C) Engine cylinder
(D) Jacket cooling water
129. The function of diesel feed pump is to:
(A) pump the fuel from the tank into the injection pump
(B) pump the oil into the’ main gallery
(C) send back fuel from the injector to the tank
(D) pump the fuel from the injection pump to the injector
130. An engine converts beat energy into:
(A) Mechanical energy
(B) Chemical energy
(C) Kinetic energy
(D) Electrical energy
131. An engine has e clearance volume of 100 cm3 and piston displacement volume of 800 cm3 The compression ratio is:
(A) 8: 1
(B) 7: 1
(C) 9:1
(D) 1:8
132. The quantity of air petrol mixture that enters the engine cylinder is regulated by the:
(A) Hot
(B) throttle valve
(C) needle valve
(D) main jet
133. Which transmission unit provides a smooth take up of the drive?
(A) gear box
(B) final drive
(C) clutch
(D) differential
134. Deposit of carbon in the exhaust system
(A) will increase noise level
(B) will reduce back pressure
(C) will increase back pressure
(D) will have no effect on back pressure
135. If a tyre is marking with 8.25 x 20 x 10 PR, 8.26 means
(A) Diameter of tyre
(B) Radius of tyre
(C) Diameter of rim
(D) Width of tyre
136. Incorrect tyre pressure causes:
(A) over heating
(B) unsafe steering
(C) rapid tyre wear
(D) all of the above
137. The starting system consists of:
(A) Battery, Switch, Dynamo
(B) Magnetto. Switch, Starter motor
(C) Battery, Switch, Starter motor
(D) Magnetto, Switch, Dynamo
138. The wheel and axle causing support the entire weight of the vehicle in the:
(A) semi floating axle
(B) three-quarter floating axle
(C) drive or live axle
(D) full floating axle
139. Braking is produced by the frictional contact between the brake drum and:
(A) brake shoes
(B) wheel cylinder piston
(C) expanding cam
(D) brake shoe return spring
140. The electrolyte used in lend acid battery is:
(A) Nitric acid
(B) Citric acid
(C) Sulphuric acid with water
(D) Hydrochloric acid with water
141. The device in the cooling system that increases the boiling point of the water:
(A) Pressure cap
(B) Drain Plug
(C) Radiator
(D) Thermostat
142. The gap between the electrodes of a spark plug:
(A) 0.1 mm
(B) 0.2 mm
(C) 1 mm
(D) 0.3 mm
143. The purpose of a shock absorber is to:
(A) absorb the vibration of spring
(B) prevent the spring deflection
(C) absorb the road shock
(D) all of the above
144. While turning a curve, the outer wheel of the car travel more distance than the inner whee. Which device is facilitating this movement?
(A) Stub axle
(B) Final drive
(C) Differential
(D) Propeller shah
