MCQOPTIONS
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MCQOPTIONS
This section includes 365 Mcqs, each offering curated multiple-choice questions to sharpen your Automobile Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Which one of the following statements correctly describes the construction of a planetary gear type differential ? |
| A. | The six planetary pinions rotate in constant mesh with the internal gears. |
| B. | One drive shaft is splined to the central gear and the other to the planetary gear. |
| C. | Each planetary pinion gear meshes with both the central gear and the internal gear. |
| D. | The internal gear is fixed to the planetary gear. |
| Answer» C. Each planetary pinion gear meshes with both the central gear and the internal gear. | |
| 52. |
The driveshafts are connected to the differential and wheel hubs through universal joints because the universal joints |
| A. | absorb the vibrations transferred from the surface of the road |
| B. | compensate for variations in the relative positions of the differential and the wheels which result from bumpy road surfaces or other similar driving conditions. |
| C. | absorb any difference in speed between the left and right wheels when the vehicle is turning |
| D. | none of the above |
| Answer» C. absorb any difference in speed between the left and right wheels when the vehicle is turning | |
| 53. |
An over-inflated tyre will wear the tread most near the |
| A. | edges |
| B. | corners |
| C. | centre |
| D. | none of these |
| Answer» D. none of these | |
| 54. |
The connecting rod lower end is connected to the relevant __________ of crankshaft. |
| A. | big end |
| B. | crank arm |
| C. | journal |
| D. | small end |
| Answer» D. small end | |
| 55. |
A traction control system (TCS) in automobiles controls the |
| A. | vibrations on the steering wheel |
| B. | engine power during acceleration |
| C. | torque that is transmitted by the tyres to the road surface |
| D. | stopping distance in case of emergency |
| Answer» D. stopping distance in case of emergency | |
| 56. |
How many cells are used in a 12 volt car battery ? |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» D. 8 | |
| 57. |
A petrol that detonates easily is called |
| A. | high octane petrol |
| B. | low octane petrol |
| C. | unleaded petrol |
| D. | blended fuel |
| Answer» C. unleaded petrol | |
| 58. |
The main characteristics of a maintenance-free (MF) battery is that |
| A. | a maintenance-free battery requires little maintenance during normal use and it is sufficient to add water instead of an electrolyte containing sulphuric acid |
| B. | a maintenance-free battery has a relatively short shelf life when compared with standard batteries |
| C. | since it is sealed, the water in a maintenance-free battery is not lost through evaporation thus accordingly it is not necessary to top up the cells with water |
| D. | recharging of a maintenance-free battery is neither required nor possible |
| Answer» D. recharging of a maintenance-free battery is neither required nor possible | |
| 59. |
Which of the following is not a part of the chassis ? |
| A. | Wheels |
| B. | Front axle |
| C. | Steering system |
| D. | Seats |
| Answer» E. | |
| 60. |
In a four wheel drive (4WD), the number of gear boxes are |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 61. |
A four-cylinder engine has a capacity of 2.4 litres. The swept volume of one cylinder is |
| A. | 400 cm³ |
| B. | 600 cm³ |
| C. | 1200 cm³ |
| D. | 2400 cm³ |
| Answer» C. 1200 cm³ | |
| 62. |
The crankshaft of a typical in-line four cylinder engine has __________ balance weights. |
| A. | 12 |
| B. | 4 |
| C. | 16 |
| D. | 8 |
| Answer» E. | |
| 63. |
If the engine coolant leaks into the engine oil, then engine oil |
| A. | appears milky |
| B. | becomes foamy |
| C. | turns black |
| D. | none of these |
| Answer» B. becomes foamy | |
| 64. |
The engine oil is stored in __________ when the engine is not running. |
| A. | oil pan |
| B. | cylinder head |
| C. | oil pump |
| D. | separate oil tank |
| Answer» B. cylinder head | |
| 65. |
Which of the following is not an automobile ? |
| A. | Motor cycle |
| B. | Passenger car |
| C. | Aeroplane |
| D. | Truck |
| Answer» D. Truck | |
| 66. |
The function of an alternator in an automobile is to |
| A. | supply electric power |
| B. | convert mechanical energy into electrical energy |
| C. | continually recharge the battery |
| D. | partly convert engine power into electric power |
| Answer» D. partly convert engine power into electric power | |
| 67. |
The octane rating of petrol commerically available is |
| A. | 85-95 |
| B. | 95-100 |
| C. | 100-110 |
| D. | 110-125 |
| Answer» B. 95-100 | |
| 68. |
The difference between DOT 3 and DOT 4 brake fluids is |
| A. | DOT 4 fluid has a higher boiling point than DOT 3 fluid |
| B. | DOT 4 fluid has a lower boiling point than DOT 3 fluid |
| C. | DOT 3 and DOT 4 fluids have the same boiling point, but DOT 4 fluid has a longer service life |
| D. | DOT 4 fluid is more resistant to freezing than DOT 3 fluid |
| Answer» B. DOT 4 fluid has a lower boiling point than DOT 3 fluid | |
| 69. |
The information provided by the oxygen (O2) sensor to the feedback control system is about the |
| A. | air-fuel ratio |
| B. | air temperature |
| C. | air flow speed |
| D. | exhaust gas volume |
| Answer» B. air temperature | |
| 70. |
The component that connects the steering rack to the knuckles is |
| A. | tie-rod |
| B. | sector gear |
| C. | pivot |
| D. | spline |
| Answer» B. sector gear | |
| 71. |
The tilting of the front wheels away from the vertical, when viewed from the front of the car, is called |
| A. | camber |
| B. | caster |
| C. | toe-in |
| D. | toe-out |
| Answer» B. caster | |
| 72. |
The main function of the tread pattern on tyre is that |
| A. | the tread grooves pass air between the tyre and road surface, thereby preventing tyre from overheating |
| B. | the crests between the tread grooves absorb road noise |
| C. | in wet conditions, the tread grooves expel water that is drawn between the tyre and road surface |
| D. | the tread pattern protects the tyre's inner carcass from small stones and pieces of glass |
| Answer» D. the tread pattern protects the tyre's inner carcass from small stones and pieces of glass | |
| 73. |
Two speed reverse gear arrangement is generally provided in case of |
| A. | passenger cars |
| B. | metadors |
| C. | tractors |
| D. | trucks |
| Answer» D. trucks | |
| 74. |
Which of the following oil is more viscous ? |
| A. | SAE 30 |
| B. | SAE 40 |
| C. | SAE 70 |
| D. | SAE 80 |
| Answer» E. | |
| 75. |
The main characteristics of a maintenance free (MF) battery is that |
| A. | A maintenance free battery requires little maintenance during normal use and it is sufficient to add water instead of an electrolyte containing sulphuric acid |
| B. | A maintenance free battery has a relatively short shelf life when compared with standard batteries |
| C. | Since it is sealed, the water in maintenance free battery is not lost through evaporation thus accordingly it is not necessary to top up the cells with water |
| D. | Recharging of a maintenance free battery is neither required nor possible |
| Answer» D. Recharging of a maintenance free battery is neither required nor possible | |
| 76. |
When indicated power (I.P.) and frictional power (F.P.) are known, we can calculate |
| A. | Brake power |
| B. | Compression ratio |
| C. | Specific air consumption |
| D. | Mean effective pressure |
| Answer» B. Compression ratio | |
| 77. |
Tachometer in a vehicle measures |
| A. | Speed |
| B. | Distance |
| C. | Engine r.p.m. |
| D. | Fuel consumption |
| Answer» D. Fuel consumption | |
| 78. |
The drive-shafts are connected to the differential and wheel hubs through universal joints because the universal joints |
| A. | Absorb the vibrations transferred from the surface of the road |
| B. | Compensate for variations in the relative positions of the differential and the wheels which result from bumpy road surfaces or other similar driving conditions. |
| C. | Absorb any difference in speed between the left and right wheels when the vehicle is turning |
| D. | None of the above |
| Answer» C. Absorb any difference in speed between the left and right wheels when the vehicle is turning | |
| 79. |
When turning 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 |
| Answer» E. | |
| 80. |
The function of oil control rings is that it |
| A. | Lubricates the cylinder wall by releasing oil from its hole |
| B. | Keeps the cylinder wall lubricated by holding oil in its channel |
| C. | Prevents engine oil from going into the combustion chamber and returns excess lubricating oil off the cylinder wall through the return holes in the piston to the oil pan |
| D. | Maintains a seal and prevents escape of burned gases and oil leakage |
| Answer» D. Maintains a seal and prevents escape of burned gases and oil leakage | |
| 81. |
The function of a first compression ring (top ring) is that it |
| A. | Increases the combustion temperature |
| B. | Creates swirl |
| C. | Maintains a seal and prevents the fuel leakage |
| D. | Maintains a seal and prevents escape of burned gases and loss of pressure in the combustion chamber |
| Answer» E. | |
| 82. |
The two kinds of piston rings are |
| A. | Compression and oil control rings |
| B. | Compression and sliding seal rings |
| C. | Oil scrapper and oil control rings |
| D. | Pressure and sealing rings |
| Answer» B. Compression and sliding seal rings | |
| 83. |
The purpose of adding pigment to the paint is that it |
| A. | Optimises the viscosity of paint |
| B. | Makes paint film hard |
| C. | Gives colour and filling up effect to the paint |
| D. | None of the above |
| Answer» D. None of the above | |
| 84. |
The torque converter uses ________ to transfer torque. |
| A. | Air |
| B. | Automatic transmission fluid (ATF) |
| C. | Gears |
| D. | Steel belt |
| Answer» C. Gears | |
| 85. |
The forced fed lubrication system means that the oil is delivered to the engine by |
| A. | Gravity |
| B. | The pressure created by the oil pump |
| C. | Splashing action of the crankshaft |
| D. | None of these |
| Answer» C. Splashing action of the crankshaft | |
| 86. |
In a four speed four stroke Diesel engine, the intake valve |
| A. | Opens at T.D.C. and closes at B.D.C. |
| B. | Opens at 20° before T.D.C. and closes at 35° after B.D.C. |
| C. | Opens at 10° after T.D.C. and closes at 20° before B.D.C. |
| D. | None of the above |
| Answer» C. Opens at 10° after T.D.C. and closes at 20° before B.D.C. | |
| 87. |
The basic function of the suspension is to |
| A. | Absorbs vibration and impact forces from the road surface |
| B. | Ensure that the steering wheel can deliver a suitable amount of steering force |
| C. | Ensure that wheel alignment is not disturbed during driving |
| D. | Automatically correct the effects of over steering |
| Answer» B. Ensure that the steering wheel can deliver a suitable amount of steering force | |
| 88. |
The sequence order of events in a four stroke engine is |
| A. | Suction exhaust power compression |
| B. | Suction power compression exhaust |
| C. | Suction compression power exhaust |
| D. | Exhaust compression power suction |
| Answer» D. Exhaust compression power suction | |
| 89. |
The main cause for the change in engine oil viscosity is |
| A. | Humidity |
| B. | Temperature |
| C. | Vibration |
| D. | Contamination |
| Answer» C. Vibration | |
| 90. |
One effect of detonation is |
| A. | Delay in ignition |
| B. | Loss of power |
| C. | Overheating of engine |
| D. | Overcooling of engine |
| Answer» C. Overheating of engine | |
| 91. |
Which of the following indicates multi-grade oil? |
| A. | SAE 30 |
| B. | API SF |
| C. | SAE20 W50 |
| D. | API 50 |
| Answer» D. API 50 | |
| 92. |
Which of the following oil is more viscous? |
| A. | SAE 30 |
| B. | SAE 40 |
| C. | SAE 70 |
| D. | SAE 80 |
| Answer» E. | |
| 93. |
The oil pump is driven by the |
| A. | Camshaft |
| B. | Alternator shaft |
| C. | Crankshaft via drive belt |
| D. | Crankshaft directly |
| Answer» E. | |
| 94. |
The ease with which petrol vaporizes is called its |
| A. | Oxidation |
| B. | Octane number |
| C. | Volatility |
| D. | Cetane number |
| Answer» D. Cetane number | |
| 95. |
Two general types of tyres are |
| A. | Tube type and tubeless |
| B. | Solid and tubeless |
| C. | Air and pneumatic |
| D. | Split rim and drop centre |
| Answer» B. Solid and tubeless | |
| 96. |
Which one of the following statements correctly describes the construction of a planetary gear type differential? |
| A. | The six planetary pinions rotate in constant mesh with the internal gears. |
| B. | One drive shaft is splined to the central gear and the other to the planetary gear. |
| C. | Each planetary pinion gear meshes with both the central gear and the internal gear. |
| D. | The internal gear is fixed to the planetary gear. |
| Answer» C. Each planetary pinion gear meshes with both the central gear and the internal gear. | |
| 97. |
Which one of the following statement correctly describes the construction of a bevel gear type differential? |
| A. | The drive shafts are splined to the differential carrier. |
| B. | The left side gear and the differential carrier rotate in constant unison. |
| C. | The differential carrier houses differential pinion gears and side gears; each pinion gear meshes with a different side gear. |
| D. | The differential carrier houses differential pinion gears and side gears. |
| Answer» E. | |
| 98. |
The main merit of a multi cylinder type cylinder sleeve is |
| A. | Smaller engine dimensions |
| B. | Better cooling efficiency |
| C. | High rigidity |
| D. | None of these |
| Answer» B. Better cooling efficiency | |
| 99. |
The materials 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 |
| Answer» C. Steel and aluminium alloy | |
| 100. |
In which of the following conditions, the idle CO percentage should be measured with the vehicle? |
| A. | Headlights and other electrical devices are switched off |
| B. | Headlights and other electrical devices are switched on |
| C. | Headlights and other lights are switched off |
| D. | Headlights are switched on |
| Answer» B. Headlights and other electrical devices are switched on | |