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.
| 151. |
The piston compression rings are made of |
| A. | Cast iron |
| B. | Steel |
| C. | Aluminium |
| D. | Bronze |
| Answer» B. Steel | |
| 152. |
The function of an oil control orifice is that it |
| A. | Returns cylinder head lubricating oil to the oil pan at high speed |
| B. | Turns oil into fine mist for spray lubrication |
| C. | Regulates the pressure of engine oil supplied by the oil pump for the lubrication of cylinder head mechanism and other purposes |
| D. | Removes impurities from cylinder head lubricating oil |
| Answer» D. Removes impurities from cylinder head lubricating oil | |
| 153. |
During suction stroke, the inside pressure of cylinder is |
| A. | More than the atmospheric pressure |
| B. | Less than the atmospheric pressure |
| C. | Equal to the atmospheric pressure |
| D. | None of these |
| Answer» C. Equal to the atmospheric pressure | |
| 154. |
The two rows of cylinders in a 'V' type engine are generally arranged at |
| A. | 45° |
| B. | 60° |
| C. | 90° |
| D. | 130° |
| Answer» C. 90° | |
| 155. |
The component that is responsible for converting the rotation of the steering wheel into lateral motion is the |
| A. | Steering wheel |
| B. | Steering shaft |
| C. | Steering gearbox |
| D. | Tie rod |
| Answer» D. Tie rod | |
| 156. |
The function of a proportioning control valve (PCV) in a brake system is to |
| A. | Ensure that equal pressure is supplied to the front and rear brakes throughout every braking operation |
| B. | Reduce the brake fluid pressure when the brakes approach their lockup point |
| C. | Cause less brake fluid pressure to act on the front brakes than on the rear brakes when the fluid pressure exceeds a predetermined level |
| D. | Cause less brake fluid pressure to act on the rear brakes than on the front brakes when the fluid pressure exceeds a predetermined level |
| Answer» E. | |
| 157. |
In a square type engine |
| A. | Geometrical shape is square |
| B. | Diameter and length of piston are same |
| C. | Two cylinders are placed horizontal and two vertical |
| D. | Stroke length and cylinder bore are same |
| Answer» E. | |
| 158. |
An engine 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 |
| Answer» D. 10 : 1 | |
| 159. |
The component in the radiator of an automobile that increases the boiling point of water is |
| A. | Drain plug |
| B. | Water jacket |
| C. | Vacuum valve |
| D. | Pressure cap |
| Answer» E. | |
| 160. |
The process of supplying the intake air to the engine cylinder at a pressure greater than the pressure of the surrounding atmosphere is known as |
| A. | Supercharging |
| B. | Auto ignition |
| C. | Scavenging |
| D. | Detonation |
| Answer» B. Auto ignition | |
| 161. |
Thinner is added to the paint in order to |
| A. | Make pigments and resin mix easily |
| B. | Make paint film hard |
| C. | Optimise its viscosity |
| D. | None of these |
| Answer» D. None of these | |
| 162. |
The negative terminal post on the top of a battery is |
| A. | Smaller than the positive terminal post |
| B. | Larger than the positive terminal post |
| C. | Of the same size as the positive terminal post |
| D. | None of these |
| Answer» B. Larger than the positive terminal post | |
| 163. |
Two speed reverse gear arrangements is generally provided in case of |
| A. | Passenger cars |
| B. | Matadors |
| C. | Tractors |
| D. | Trucks |
| Answer» D. Trucks | |
| 164. |
The starter motor is driven by |
| A. | Chain drive |
| B. | Gear drive |
| C. | Flat belt drive |
| D. | V-belt drive |
| Answer» C. Flat belt drive | |
| 165. |
The three 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 |
| Answer» D. V, double row, and opposed | |
| 166. |
Which of the following is not an automobile? |
| A. | Motor cycle |
| B. | Passenger car |
| C. | Aeroplane |
| D. | Truck |
| Answer» D. Truck | |
| 167. |
The lower cylindrical portion of the piston which improves piston cooling performance is called |
| A. | Piston crown |
| B. | Connecting rod |
| C. | Piston pin boss |
| D. | Piston skirt |
| Answer» E. | |
| 168. |
Odometer is an instrument used for measurement of |
| A. | Power |
| B. | Fuel consumption |
| C. | Engine r.p.m. |
| D. | Distance |
| Answer» E. | |
| 169. |
The maximum torque multiplication ratio in a torque converter is about |
| A. | 2.5 |
| B. | 10 |
| C. | 25 |
| D. | 40 |
| Answer» B. 10 | |
| 170. |
The main function of a resonator is that it |
| A. | Regulates the intake air flow rate |
| B. | Reduces the intake air noise |
| C. | Enhances intake efficiency |
| D. | Regulates the intake air temperature |
| Answer» C. Enhances intake efficiency | |
| 171. |
The fuel that detonates easily, is |
| A. | N-heptane |
| B. | Iso-octane |
| C. | Benzene |
| D. | Alcohol |
| Answer» B. Iso-octane | |
| 172. |
When the piston is at T.D.C., the volume above the piston in the combustion chamber is the |
| A. | Clearance volume |
| B. | Cylinder volume |
| C. | Exhaust volume |
| D. | None of these |
| Answer» B. Cylinder volume | |
| 173. |
The condition 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 |
| Answer» C. Low temperature combustion | |
| 174. |
In a four wheel drive (4WD), the numbers of gear boxes are |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 175. |
The condition that results in large quantities of CO emission is |
| A. | Insufficient air during combustion |
| B. | Insufficient fuel during combustion |
| C. | Low temperature combustion |
| D. | High temperature combustion |
| Answer» B. Insufficient fuel during combustion | |
| 176. |
The advantage of having a tandem master cylinder arrangement in automobiles is that it |
| A. | Enhances safety by serving two independent lines in a divided line brake circuit |
| B. | Enhances safety by activating the brakes using vacuum pressure in the event of brake fluid loss |
| C. | Supplies equal fluid pressure to each line of a divided line brake circuit, thereby preventing the brakes from dragging on one side |
| D. | Boosts the brake fluid pressure to reduce the force required to depress the brake pedal |
| Answer» B. Enhances safety by activating the brakes using vacuum pressure in the event of brake fluid loss | |
| 177. |
The painting 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 |
| Answer» E. | |
| 178. |
If a tyre is designated as 175/65 R-14 82-S, then the aspect ratio for the tyre is |
| A. | 175 |
| B. | 65 |
| C. | 14 |
| D. | 82 |
| Answer» C. 14 | |
| 179. |
The clutch is located between the transmission and the |
| A. | Engine |
| B. | Rear axle |
| C. | Propeller shaft |
| D. | Differential |
| Answer» B. Rear axle | |
| 180. |
A basic difference between the spark ignition engine and the Diesel engine is that the |
| A. | Diesel engine compresses air alone instead of an air-fuel mixture |
| B. | Air temperature ignites the fuel in the Diesel engine |
| C. | Fuel is sprayed into the combustion chamber in the Diesel engine as the piston nears T.D.C. on the compression stroke |
| D. | All of the above |
| Answer» E. | |
| 181. |
The function of a radiator fan in the cooling system is that |
| A. | It blows air through the radiator when necessary |
| B. | It is turned by wind force as the vehicle moves forward, and its rotation drives the water pump |
| C. | It cools the engine by blowing air onto the cylinder block |
| D. | It draws heat out of the engine compartment |
| Answer» B. It is turned by wind force as the vehicle moves forward, and its rotation drives the water pump | |
| 182. |
The heat 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 |
| Answer» D. Conduction, convection and radiation | |
| 183. |
The compression ratio of a petrol engine is nearly |
| A. | 4:1 |
| B. | 8:1 |
| C. | 15:1 |
| D. | 20:1 |
| Answer» C. 15:1 | |
| 184. |
The device for smoothening out the power impulses from the engine is called |
| A. | Clutch |
| B. | Differential |
| C. | Flywheel |
| D. | Torque converter |
| Answer» D. Torque converter | |
| 185. |
Petrol that detonates easily is called |
| A. | High octane petrol |
| B. | Low octane petrol |
| C. | Unleaded petrol |
| D. | Blended fuel |
| Answer» C. Unleaded petrol | |
| 186. |
The ball joints are used on the tie rod ends, because they |
| A. | Reduce the amount of noise generated |
| B. | Reduce the amount of sliding resistance |
| C. | Can deal with movement of the suspension both vertically and in other directions |
| D. | Improve the force transmission speed |
| Answer» D. Improve the force transmission speed | |
| 187. |
The frequency of flashing of light per minute in a direction (side turn) indicator is about |
| A. | 9 |
| B. | 90 |
| C. | 900 |
| D. | 9000 |
| Answer» C. 900 | |
| 188. |
The power actually developed inside the engine cylinder is called as |
| A. | Indicated power |
| B. | Brake power |
| C. | Frictional power |
| D. | None of these |
| Answer» B. Brake power | |
| 189. |
In a four cylinder inline engine, the number of firing strokes in one revolution of the crank is |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 190. |
In petrol engines, during suction stroke, _________ is drawn in the cylinder |
| A. | Air and fuel |
| B. | Only fuel |
| C. | Only air |
| D. | None of these |
| Answer» B. Only fuel | |
| 191. |
The ignition coil is used to |
| A. | Step up current |
| B. | Step down current |
| C. | Step up voltage |
| D. | Step down voltage |
| Answer» D. Step down voltage | |
| 192. |
The timing belt is attached to the camshaft pulley and |
| A. | Timing belt drive pulley |
| B. | Distributor |
| C. | Radiator fan pulley |
| D. | Alternator pulley |
| Answer» B. Distributor | |
| 193. |
The antiknock property of compression ignition engine fuel can be improved by adding |
| A. | Tetraethyl lead |
| B. | Trimethyl pentane |
| C. | Amyl nitrate |
| D. | Hexadecane |
| Answer» D. Hexadecane | |
| 194. |
In a hydraulic power steering system, the power steering pump is driven by a |
| A. | Belt driven by camshaft |
| B. | Chain driven by crankshaft |
| C. | Belt driven by drive-shaft |
| D. | Belt driven by crankshaft |
| Answer» E. | |
| 195. |
Damper in an automobile is used to |
| A. | Absorb the energy |
| B. | Dissipate the energy |
| C. | Release the energy |
| D. | Increase the energy |
| Answer» C. Release the energy | |
| 196. |
The acid used in automobile battery is |
| A. | Hydrochloric acid |
| B. | Hydrofluoric acid |
| C. | Nitric acid |
| D. | Sulphuric acid |
| Answer» E. | |
| 197. |
The effect of vapour locking on the brake performance is that the |
| A. | Brakes function more effectively |
| B. | Brakes fail completely |
| C. | Brake operation is delayed after depression of the brake pedal |
| D. | Vapour locking has no effect on brake performance |
| Answer» C. Brake operation is delayed after depression of the brake pedal | |
| 198. |
Engine misfiring 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 |
| Answer» C. Vapours lock in the fuel only | |
| 199. |
In an 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 |
| Answer» B. Skirt of the piston | |
| 200. |
The purpose of a thermostat in an engine cooling system is to |
| A. | Prevent the coolant from boiling |
| B. | Allow the engine to warm up quickly |
| C. | Indicate the coolant temperature |
| D. | Pressurise the system to raise the boiling point |
| Answer» C. Indicate the coolant temperature | |