Downloaded 13 times
Uploaded byIndranilMandal
Multiple choice questions Subject -Automobile Engineering
This document contains 64 multiple choice questions related to automobiles. The questions cover topics like vehicle classification, engine components and systems, braking systems, suspension, steering, fuels and lubricants. The document is authored by Indranil Mandal from the Department of Mechanical Engineering at Ideal Institute of Engineering. It is intended as a practice test for automobile engineering.
More Related Content
Similar to Multiple choice questions Subject -Automobile Engineering
Multiple choice questions Subject -Automobile Engineering
- 1. MULTIPLE CHOICE QUESTIONS SUBJECT-AUTOMOBILE ENGINEERING BY INDRANILMANDAL ASSISTANT PROFESSOR DEPARTMENT-MECHANICAL ENGINEERING IDEAL INSTITUTE OF ENGINEERING
- 2. 1. Twodoor and four door type automobiles are classified as a) Sedan b) Convertible c) Special purpose vehicles d) Pick ups
- 3. 2. Whichof these falls under LMV(Light Motor Vehicle) category based on capacity? a) Motorbikes b) Cars c) Buses d) Trains
- 4. 3. Adelivery van falls under the category of which type of vehicles? a) Heavy passenger vehicles b) Light passenger vehicles c) Heavy goods vehicles d) Light goods vehicles
- 5. 4. Thepainting of automobiles is done to (a) Prevent rust from growing on the body (b) Improve its external appearance (c) Retain the characteristics of steel for long (d) All of these
- 6. 5. Theelectrical system of an automobile contains which of the following (a) Battery (b) Alternators (c) Lighting systems (d) All of the mentioned
- 7. 6. Whatare ‘Air Dams’ a) Spoilers at the front of a vehicle b) Spoilers at the rear of a vehicle c) Spoilers at the sides of a vehicle d) Spoilers at the top of a vehicle
- 8. 7. Theair resistance to a car at 20 kmph is R. The air resistance at 40 kmph will be a) R b) 2R c) 4R d) 4R²
- 9. 8. Whatis actual power delivered by the engine known as? a) Shaft power b) Horse power c) Brake power d) None of the mentioned
- 10. 9. Thetorque available at the contact between road and driving wheel is called a) Brake power b) Friction power c) Tractive effort d) Engine torque
- 11. 10. Theforce that opposes the motion of a vehicle is a) Rolling resistance b) Gradient resistance c) Wind or air resistance d) All of the mentioned
- 12. 11. Foran average type of road surface what percentage of vehicle’s weight constitutes rolling resistance a) 5 to 10% b) 1 to 2% c) 2 to 5% d) 0 to 3%
- 13. 12. Powerto weight ratio for high performance cars can range upto a) 150 b) 190 c) 230 d) 280
- 14. 13. Whatis the stoichiometric air-fuel ratio of diesel? a) 50: 1 b) 14.7: 1 c) 25: 1 d) 14.5: 1
- 15. 14. Whatis the purpose of the venturi in the carburetor? a) To decrease the fuel flow b) To increase the manifold vacuum c) To increase the air velocity d) To decrease the air velocity
- 16. 15. Whichtype of carburetor is a constant vacuum carburetor? a) Zenith b) Solex c) S. U. d) Carter
- 17. 16. Whichtype of carburetor the Solex is? a) Constant choke carburetor b) Constant vacuum carburetor c) Multiple venturi carburetors d) Multijet carburetor
- 18. 17. Theconnecting rods are generally made of __________ shaped cross-section. a) I b) C c) L d) H
- 19. 18. Thecondition that results in large quantities of HC emission is a) High temperature combustion b) Incomplete combustion c) Low temperature combustion d) High atmospheric temperature combustion
- 20. 19. Theoctane rating of petrol commercially available is a) 85-95 b) 95-100 c) 100-110 d) 110-125
- 21. 20. Theacid used in automobile battery is a) Hydrochloric acid b) Hydrofluoric acid c) Nitric acid d) Sulphuric acid
- 22. 21. Thepiston compression rings are made of a) Cast iron b) Steel c) Aluminium d) Bronze
- 23. 22. Theignition coil is used to a) Step up current b) Step down current c) Step up voltage d) Step down voltage
- 24. 23. Thecaster is called positive when the top of the king pin is inclined to the a) Rear of the vehicle b) Front of the vehicle c) Left of the vehicle d) Right of the vehicle
- 25. 24. Thefiring order for an opposed four cylinder l.C. engine is a) 1-2-3-4 b) 1-3-4-2 c) 1-4-3-2 d) 1-3-2-4
- 26. 25. Theheat transfer from coolant to air in the radiator of an automobile engine takes place by a) Radiation only b) Convention only c) Convection and radiation d) Conduction, convection and radiation
- 27. 26. Thebasic characteristics of a brake fluid is a) A high boiling point b) Low viscosity c) Compatibility with rubber and metal parts d) All of these
- 28. 27. Casteris a a) Forward tilt of the kingpin b) Backward tilt of the kingpin c) Either 'A' or 'B' d) None of these
- 29. 28. Theorder in which effort applied to the steering wheel is transferred to the front wheel is a) Steering wheel, steering gearbox, steering shaft, tie rod, steering knuckle, front wheels b) Steering wheel, steering shaft, steering gearbox, tie rod, steering knuckle, front wheels c) Steering wheel, steering shaft, steering gearbox, steering knuckle, tie rod, front wheels d) Steering wheel, tie rod, steering gearbox, steering shaft, steering knuckle, front wheels
- 30. 29. Thebest fuels for compression ignition engines are a) Straight chain paraffin b) Aromatics c) Branched chain paraffin d) Naphthalene
- 31. 30. Anoil filter bypass valve opens when the a) Engine is cold b) Engine overheats c) Oil filter becomes clogged d) Engine runs at high speed
- 32. 31. Themost accurate ignition system of a spark ignition engine is a) Magneto system b) Battery system c) Electronic control unit system d) Magneto and electronic system
- 33. 32. Ifthe air-fuel mixture in a spark ignition engine is too rich, then air-fuel ratio is about a) 17:1 b) 15:1 c) 13:1 d)10:1
- 34. 33. Ifthe engine coolant leaks into the engine oil, then engine oil a) appears milky b) becomes foamy c) turns black d) none of these
- 35. 34. Aclutch is usually designed to transmit maximum torque which is a) equal to the maximum engine torque b) 80 per cent of the maximum engine torque c) 150 per cent of the maximum engine torque d) none of these
- 36. 35. Whattype of bearing is used for main bearings and connecting rod bearings? a) Ballbearings b) Plain bearings c) Needle roller bearing d) Taper roller bearing
- 37. 36. Thetorque available at the contact between driving wheels and road is known as a) brake effort b) tractive effort c) clutch effort d) none of these
- 38. 37. Thevehicle ride will be comfortable if a) unsprung mass is kept minimum b) sprang mass is kept minimum c) vehicle mass is kept minimum d) all of these
- 39. 38. Theeffect of having excess camber is a)excessive steering alignment torque b) hard steering c) too much traction d) uneven tyre wear
- 40. 39. Theoperation of removing trapped air from the hydraulic braking system is known as a) trapping b) tapping c) bleeding d) cleaning
- 41. 40. Thealuminium alloy is used in cylinder blocks because a) it is lighter and have good heat dissipation characteristics b) material cost is low c) it does not require any cylinder liners d) the piston is also made of aluminium alloy
- 42. 41. Themost commonly used supplementary restraint system (SRS) component is a) seat belt b) brake c) airbag d) steering
- 43. 42. Thecetane number of a Diesel fuel is a measure of a) volatility b) viscosity c) ignition quality d) delay peirod
- 44. 43. Thecomponent that connects the steering rack to the knuckles is a) tie-rod b) sector gear c) pivot d) spline
- 45. 44. Whichof the following is the port fuel – injection system? a) D – MPFI b) L – MPFI c) GDI d) TBI
- 46. 45. Themechanical efficiency (ηm) of an I.C. engine is equal to (where I.P. = Indicated power, B.P. = Brake power and F.P. = Frictional power) a) I.P/B.P. b) B.P/I.P. c) B.P/F.P. d) F.P/B.P.
- 47. 46. Thecombustion process in a Diesel engine is a a) Constant volume process b) Constant pressure process c) Constant temperature process d) Adiabatic process
- 48. 47. Thebasic purpose of tyre rotation on automobiles is to a) Avoid ply separation b) Equalize wear c) Get better ride d) None of these
- 49. 48. Thematerials used for cylinder block are a) Cast iron and steel b) Cast iron and aluminium alloy c) Steel and aluminium alloy d) Brass and steel
- 50. 49. Whenturning a corner a) The front wheels are toeing out b) The front wheels are turning on different angles c) The inside front wheels has a greater angle than the outside wheel d) All of the above
- 51. 50. Whena gear box has four forward speeds and one reverse speed, it is said to be a a) 3-speed gear box b) 4-speed gear box c) 5-speed gear box d) 6-speed gear box
- 52. 51. Thecorrect way to rectify an imbalanced wheel is to a) Adjust the tyre pressure b) Rotate the tyres c) Adjust the damper spring tension d) Attach appropriate weights to the wheel at appropriate positions
- 53. 52. Theparking brake generally acts on a) Front wheels b) Rear wheels c) Front and rear wheels d) Propeller shaft
- 54. 53. Thecommonly used antifreeze solution in automobiles is a) Carbon disulphide b) Ethylene glycol c) Ammonium chloride d) Freon-12
- 55. 54. Enginemisfiring is likely to result from a) Spark plug gap too small b) Spark plug gap too wide c) Vapours lock in the fuel only d) Incorrect fuel air mixture
- 56. 55. Thespecific gravity of acid in a fully charged battery is generally a) 1.00 b) 1.28 c) 1.82 d) 2.81
- 57. 56. Twospeed reverse gear arrangements is generally provided in case of a) Passenger cars b) Matadors c) Tractors d) Trucks
- 58. 57. Whichof the following oil is more viscous? a) SAE 30 b) SAE 40 c) SAE 70 d) SAE 80
- 59. 58. Themain function of intake manifold is that it a) Promotes the mixture of air and fuel b) Reduces intake noise c) Cools the intake air to a suitable temperature d) Distributes intake air equally to the cylinders
- 60. 59. Thefunction of an alternator in an automobile is to a) Supply electric power b) Converts mechanical energy into electrical energy c) Continually recharges the battery d) Partly converts engine power into electric power
- 61. 60. Theoctane number of compressed natural gas (CNG) is a)90 b)100 c)110 d)120
- 62. 61. Incorrectsteering axis inclination (S.A.I.) causes a) Tendency to assume toe-out orientation b) Generation of a braking effect at tight corners c) Poor recovery of the steering wheel after making a turn d) The vehicle to pull to the side of lesser inclination
- 63. 62. Thefunction of a governor in automobiles is to a) Limit the power b) Limit the vehicle speed c) Maintain constant engine speed d) Maximise the fuel economy
- 64. 63. Theminimum parking brake force is generally ___________ of gross vehicle mass (GVM). a) 5% b) 10% c) 15% d) 20%
- 65. 64. Cushioningsprings in clutch plate reduces a) Vehicle speed b) Torsional vibrations c) Jerky starts d) None of these
- 66. 65. Thenumber of exhaust manifolds in a V6 engine is a)1 b)2 c)4 d)8
- 67. 66. Cushioningsprings in clutch plate reduces a) Vehicle speed b) Torsional vibrations c) Jerky starts d) None of these
- 68. 67. Tachometerin a vehicle measures a) Speed b) Distance c) Engine r.p.m. d) Fuel consumption
- 69. 68. Odometeris an instrument used for measurement of a) Power b) Fuel consumption c) Engine r.p.m. d) Distance
- 70. 69. Twogeneral types of tyres are a) Tube type and tubeless b) Solid and tubeless c) Air and pneumatic d) Split rim and drop centre
- 71. 70. Petrolthat detonates easily is called a) High octane petrol b) High octane petrol c) Unleaded petrol d) Blended fuel
- 72. 71. Theworking fluid normally used in hydraulic brake systems is a) A solution of castor oil in alcohol along with neutralizer b) High speed diesel oil along with alcohol c) SAE 20 oil with anti-corrosion additives d) A mixture of vegetable oil and SAE 10 oil
- 73. 72. Theapproximate ratio of effort applied : effort available from servo system is a) 1:1 b) 3:1 c) 1:4 d) 10:1
- 74. 73. Gudgeonpins or piston pins are made by a) Piston material itself b) Cork c) Cast iron d) Hardened and ground steel
- 75. 74. Theengine is usually supported by the frame a) Four or five b) One or two c) Three or four d) One or two
- 76. 75. Theautomobile chassis consists of the engine, frame, power train, wheels, steering and ………….. a) Braking system b) Wind shield c) The doors d) Luggage boot
- 77. 76. Leafspring for vehicles are nipped to a) Ensure that all leaves are uniformly stressed during loading b) Improve the load carrying capacity of spring c) To increase the interleaf friction d) To vary the effective length of the spring
- 78. 77. Twoadvantages of using helical gears rather than spur gears in a transmission system are a) Strength and cost b) Strength and less end thrust c) Noise level and strength d) Noise level and economy
- 79. 78. Theparking brakes employed in vehicles are operated a) Mechanically b) Hydraulically c) Pneumatically d) None of these
- 80. 79. Oneeffect of detonation is a) Delay in ignition b) Loss of power c) Overheating of engine d) Overcooling of engine
- 81. 80. Whenthe top of the wheel is tilted outward, then it is called a) Positive camber b) Negative camber c) Positive caster d) Negative caster
- 82. 81. Ifclearance volume of I.C. engines is increased, the compression ratio will a) Increase b) Decrease c) Remain constant d) Be doubled
- 83. 82. Theengine oil is stored in _________ when the engine is not running. a) Oil pan b) Cylinder head c) Oil pump d) Separate oil tank
- 84. 83. Whichof the following is not a part of the chassis? a) Wheels b) Front Axle c) Steering System d) Wheel
- 85. 84. Valveoverlap is the number of degrees of camshaft rotation during which a) Both valves are closed b) Both valves are open c) Both 'A' and 'B' d) None of these
- 86. 85. Amaintenance free battery a) Has lead-antimony plate grid b) Has lead-calcium plate grid c) Does not contain acid d) Does not contain water
- 87. 86. Thecoefficient of rolling resistance for a truck weighing 63,500 N is 0.018. The rolling resistance to the truck is a) 1.143 N b) 11.43 N c) 114.3 N d) 1143 N
- 88. 87. TheDiesel engines as compared to petrol engines require a) Bigger flywheel b) Smaller flywheel c) Same size of flywheel d) No flywheel
- 89. 88. Inan engine, the temperature of the piston will be more at the a) Crown of the piston b) Skirt of the piston c) Piston walls d) Piston rings
- 90. 89. Therating of C.I. engine fuel (Diesel) is given by a) Octane number b) Performance number c) Cetane number d) None of these
- 91. 90. InDiesel engines, the duration between the time of injection and the time of ignition is called a) Spill cut-off b) Delay period c) Injection period d) Ignition period
- 92. 91. Theantiknock property of compression ignition engine fuel can be improved by adding a) Tetraethyl lead b) Trimethyl pentane c) Amyl nitrate d) Hexadecane
- 93. 92. Theconnecting rod connects the piston and the a) Cylinder head b) Cylinder block c) Camshaft d) crankshaft
- 94. 93. Thethree basic cylinder arrangements for automotive engines are a) Flat, radial, and V b) In a row, in line, and opposed c) In line, V, and opposed d) V, double row, and opposed
- 95. 94. Whichpart of the automobile tyre is subjected to greatest flexing action? a) Bead b) Side wall c) Shoulder d) Tread
- 96. 95. Anengine has a clearance volume of 100 cm³ and a swept volume of 800 cm³. The compression ratio is a) 7 : 1 b) 8 : 1 c) 9: 1 d) 10 : 1
- 97. 96. Aclutch is usually designed to transmit maximum torque which is a) Equal to the maximum engine torque b) 80% of the maximum engine torque c) 150% of the maximum engine torque d) None of these
- 98. 97. Thecomponent of the oil filter that prevents the passage of metal particles and sludge is a) Element b) Relief valve c) Check valve d) Case
- 99. 98. Themain function of an exhaust muffler is the a) Optimization of exhaust efficiency b) Reduction of exhaust noise c) Reduction of nitrogen oxide in the exhaust gases d) Reduction of the exhaust gas volume
- 100. 99. Inautomobiles G.V.W. refers to a) Gross vehicle width b) Gross vehicle weight c) Gross vehicle wheel base d) Gross vehicle wheel track
- 101. 100. Thesize of engine cylinder is referred in terms of its a) Diameter and bore b) Displacement and efficiency c) Bore and stroke d) Bore and length
- 102.