MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 315 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. |
In a scooter engine the cylinder is lubricated by |
| A. | Cylinder does not require lubrication |
| B. | Lubrication plug |
| C. | Pressure lubrication |
| D. | Splash lubrication |
| E. | Mixing lubricating oil in the fuel |
| Answer» F. | |
| 152. |
The maximum pressure generated by the fuel injection pump does not reach the nozzle end immediately. The lag is due to |
| A. | friction in the oil column |
| B. | pressure wave in the oil column |
| C. | turbulence in the cylinder |
| D. | none of the above |
| E. | None of the above |
| Answer» C. turbulence in the cylinder | |
| 153. |
Diesel engines are also known as |
| A. | S.I. engines |
| B. | C.I. engines |
| C. | Steam engines |
| D. | none of the above |
| E. | None of the above |
| Answer» C. Steam engines | |
| 154. |
The problem of exhaust emissions can be handled by |
| A. | engine design modification |
| B. | treatment of exhaust gases |
| C. | fuel modification |
| D. | All of the above |
| E. | None of the above |
| Answer» E. None of the above | |
| 155. |
For balancing single cylinder engine a counter weight is added to |
| A. | Crankshaft |
| B. | Piston rings |
| C. | Piston |
| D. | Gudgeon pin |
| E. | Connecting rod |
| Answer» B. Piston rings | |
| 156. |
A smoky blue exhaust is due to |
| A. | Burning of oil in combustion chamber |
| B. | Incorrect valve adjustment |
| C. | Excessive air |
| D. | Incorrect tappet adjustment |
| E. | Excessive rich mixture |
| Answer» B. Incorrect valve adjustment | |
| 157. |
In an engine shows lack of power on running the probable cause could be |
| A. | Poor compression |
| B. | Faulty ignition |
| C. | Overheating |
| D. | Over cooling |
| E. | Any of the above |
| Answer» F. | |
| 158. |
High sulphur content of petrol affects the engine performance by |
| A. | causing corrosion of muffler and exhaust pipe |
| B. | had odours |
| C. | poor explosion characteristics |
| D. | All of the above |
| E. | None of the above |
| Answer» E. None of the above | |
| 159. |
Worn out carburettor jets are likely to cause |
| A. | More noise |
| B. | Excess fuel consumption |
| C. | Knocking |
| D. | Engine warm up |
| E. | Excess engine output |
| Answer» C. Knocking | |
| 160. |
The firing order in case of four cylinder I.C. engine is given as |
| A. | 1-2-3-4 |
| B. | 1-4-3-2 |
| C. | 1-2-4-3 |
| D. | none of the above |
| E. | None of the above |
| Answer» D. none of the above | |
| 161. |
The knocking C.I engines is characterised by the sudden auto-ignition of the mixture |
| A. | at the end of the combustion process |
| B. | in the middle of combustion process |
| C. | at the very beginning of the combustion process |
| D. | none of the above |
| E. | None of the above |
| Answer» D. none of the above | |
| 162. |
An opposed cylinder engine has |
| A. | One crankshaft and two camshafts |
| B. | One crankshaft and one camshafts |
| C. | Two crankshafts and two camshafts |
| D. | Two crankshafts and four camshafts |
| E. | Two crankshafts and one camshaft |
| Answer» D. Two crankshafts and four camshafts | |
| 163. |
Which part is not common between the petrol and diesel engines |
| A. | Battery |
| B. | Dynamo |
| C. | Air cleaner |
| D. | Fuel injector |
| E. | Exhaust silencer |
| Answer» E. Exhaust silencer | |
| 164. |
The substance which when added in a small proportion into petrol reduces knocking is |
| A. | iso-butane |
| B. | n-heptane |
| C. | methyl nepthalene |
| D. | tetra ethyl lead |
| E. | None of the above |
| Answer» E. None of the above | |
| 165. |
The need for installing new piston rings is determined by checking |
| A. | The gap between the ends of the ring |
| B. | The clearance between cylinder and piston rings |
| C. | The clearance between piston and piston rings |
| D. | The clearance between cylinder and piston |
| E. | The surface of the piston ring |
| Answer» C. The clearance between piston and piston rings | |
| 166. |
The air gap between the central electrode and ground electrode of a spark plug is approximately |
| A. | 1 cm |
| B. | 0.5 cm |
| C. | 0.2 cm |
| D. | 0.1 cm to 0.06 cm |
| E. | None of the above |
| Answer» E. None of the above | |
| 167. |
Petrol engines are also known as |
| A. | S.I. Engines |
| B. | C.I. Engines |
| C. | Steam Engines |
| D. | none of the above |
| E. | None of the above |
| Answer» B. C.I. Engines | |
| 168. |
Most of the mopeds in India have capacity of |
| A. | 50 c.c. |
| B. | 250 c.c. |
| C. | 10 c.c. |
| D. | 150 c.c. |
| E. | 174 c.c. |
| Answer» B. 250 c.c. | |
| 169. |
Ignition quality of petrol is expressed by |
| A. | Calorific value |
| B. | Octane no |
| C. | Cetane no |
| D. | Mass/volume ratio |
| E. | Alcohol |
| Answer» C. Cetane no | |
| 170. |
The king pin inclination is usually |
| A. | Less than |
| B. | Between 2? and 5? |
| C. | More than 7? |
| D. | More than 7? |
| E. | Between 1? to 2? |
| Answer» C. More than 7? | |
| 171. |
Which of the following vehicle does not have battery? |
| A. | Ambassador car |
| B. | Maruti car |
| C. | Vespa scooter |
| D. | Tata truck |
| E. | None of the above |
| Answer» D. Tata truck | |
| 172. |
Which of the following is a diesel engined vehicle? |
| A. | Ambassador Mark II |
| B. | Fiat 1100 |
| C. | Premier Padmini |
| D. | Standard Gazel |
| E. | None of the above |
| Answer» F. | |
| 173. |
In commercial vehicle layouts engine is located forward, rear or under floor mainly to |
| A. | Minimize the tendency to over turn |
| B. | Reduce the weight of chassis |
| C. | Increase fuel economy |
| D. | Better utilise the space |
| E. | Have better weight distribution |
| Answer» F. | |
| 174. |
Which of the following is a front wheel drive vehicle? |
| A. | Matador |
| B. | Ambassador |
| C. | Premier Padmini |
| D. | Maruti |
| E. | None of the above |
| Answer» E. None of the above | |
| 175. |
If brake wheels get locked before the vehicle stops, the vehicle is said to be |
| A. | Rubbing |
| B. | Slipping |
| C. | Rolling |
| D. | Skidding |
| E. | Sliding |
| Answer» E. Sliding | |
| 176. |
In a vehicle the probable cause for hard steering could be |
| A. | Low tyre pressure |
| B. | Bent wheel spindle |
| C. | Tie rod ends tight |
| D. | Excessive castor |
| E. | Any of the above |
| Answer» F. | |
| 177. |
Which tractor has an air cooled engine |
| A. | Hindustan |
| B. | HMT |
| C. | Ford |
| D. | Ferguson |
| E. | Eicher |
| Answer» F. | |
| 178. |
Which is the Diesel engined vehicle |
| A. | Ambassador Mark II |
| B. | Premier padmini |
| C. | Standard Gazel |
| D. | Maruti |
| E. | None of the above |
| Answer» F. | |
| 179. |
The device used to reduce the exhaust noise is known as |
| A. | Exhaust manifold |
| B. | Exhaust pipe |
| C. | Tail pipe |
| D. | Muffler |
| E. | None of the above |
| Answer» E. None of the above | |
| 180. |
Engine oil is usually renewed after |
| A. | 2500 - 6000 km |
| B. | 24 km |
| C. | 500 km |
| D. | 100 km |
| E. | 100 km |
| Answer» B. 24 km | |
| 181. |
In a Diesel engine the function of a fuel injector is |
| A. | To mix fuel and air |
| B. | To ignite air-fuel mixture |
| C. | To provide adequate air fuel mixture for combustion |
| D. | To provide flame front for ignition |
| E. | To spray atomized fuel in the cylinder |
| Answer» F. | |
| 182. |
Automobile radiator is filled with |
| A. | Hard water |
| B. | Acidic water |
| C. | Alkaline water |
| D. | Rain water |
| E. | Soft water |
| Answer» F. | |
| 183. |
The valve is opened as the cam lobe on the cam raises the |
| A. | Piston pin |
| B. | Valve lifter |
| C. | Bearing |
| D. | Valve guide |
| E. | Valve seat |
| Answer» C. Bearing | |
| 184. |
The speed of the engine is increased or decreased by operating |
| A. | Throttle valve |
| B. | Choke valve |
| C. | Steering |
| D. | Clutch |
| E. | Any of the above |
| Answer» B. Choke valve | |
| 185. |
When IHP and FHP on an engine are known, we can calculate |
| A. | Mean effective pressure |
| B. | Specific air consumption |
| C. | Revolutions per minute |
| D. | Brake horse power |
| E. | Compression ratio |
| Answer» E. Compression ratio | |
| 186. |
The function of a governor in automobile is to |
| A. | Limit the power |
| B. | Maintain constant engine speed |
| C. | Effect maximum fuel economy |
| D. | Maintain constant engine speed when the vehicle speed changes |
| E. | Limit the speed |
| Answer» F. | |
| 187. |
The angle during which both the inlet and exhaust valves remain open simultaneously, is known as |
| A. | exhaust value angle |
| B. | value angle |
| C. | value overlap |
| D. | none of the above |
| E. | None of the above |
| Answer» D. none of the above | |
| 188. |
By supercharging |
| A. | Power stroke becomes stronger |
| B. | Loss in exhaust is reduced |
| C. | Engine can be made to run smoother |
| D. | Thermal efficiency of the engine can be improved |
| E. | None of the above |
| Answer» E. None of the above | |
| 189. |
The term master cylinder is associated with |
| A. | Braking system |
| B. | Starting mechanism |
| C. | Engine |
| D. | Lubrication system |
| E. | Cooling cylinder |
| Answer» B. Starting mechanism | |
| 190. |
Theoretical correct air-fuel ratio for tetrol engine is |
| A. | 6 ; 1 |
| B. | 9 ; 1 |
| C. | 12 ; 1 |
| D. | 15 ; 1 |
| E. | 20 ; 1 |
| Answer» E. 20 ; 1 | |
| 191. |
As carbon accumulates in a cylinder it causes an increase in |
| A. | Clearance volume |
| B. | Ignition time |
| C. | Volumetric efficiency |
| D. | Piston displacement |
| E. | Effective compression ratio |
| Answer» F. | |
| 192. |
Power assisted brakes are often provided on |
| A. | motor cycles |
| B. | air cooled engine vehicles |
| C. | slow speed vehicles like road rollers etc. |
| D. | heavy duty vehicles |
| E. | None of the above |
| Answer» E. None of the above | |
| 193. |
The minimum cranking speed in petrol engines is |
| A. | 2 - 3 rpm |
| B. | Equal to the normal operating speed |
| C. | 60 - 80 rpm |
| D. | Half of operating speed |
| E. | One fourth of operating speed |
| Answer» D. Half of operating speed | |
| 194. |
In a S.I. engine, when most economical mixture is supplied, the colour of exhaust flame is expected to be |
| A. | Yellow-red to red |
| B. | Dark red |
| C. | Bluish, transparent |
| D. | Dark blue to reddish-yellow |
| E. | Colour of exhaust flame has nothing to do with the mixture composition |
| Answer» E. Colour of exhaust flame has nothing to do with the mixture composition | |
| 195. |
The firing order in case of four cylinder in-line engines is uaually |
| A. | 1-2-4-3 |
| B. | 1-3-4-2 |
| C. | 1-4-3-2 |
| D. | Either (A) or (B) |
| E. | Either (B) or (C) |
| Answer» F. | |
| 196. |
Ethyl fluid is used as |
| A. | To improve lubricating quality of fuel |
| B. | To increase octane rating of fuel |
| C. | As a detonating agent |
| D. | To increase cetane rotary of fuel |
| E. | As a superior type of fluid compared to others |
| Answer» C. As a detonating agent | |
| 197. |
Mixing of fuel and air in case of a diesel engine occurs in |
| A. | Injector |
| B. | Engine cylinder |
| C. | Inlet valve |
| D. | Fuel pump |
| E. | Inlet manifold |
| Answer» C. Inlet valve | |
| 198. |
Ignition advance in S.I. engine is not the direct function of |
| A. | mixture strength |
| B. | compression ratio |
| C. | grade of petrol |
| D. | load on engine |
| E. | None of the above |
| Answer» E. None of the above | |
| 199. |
As a general rule if facing on the friction disc are worn down to the rivet heads |
| A. | The clutch should be replaced |
| B. | The linkage should be adjusted |
| C. | Rivets head should be filed |
| D. | Rivets should be replaced |
| E. | The friction disc should be replaced |
| Answer» F. | |
| 200. |
In actual practice, the inlet value of a four stroke I.C. engine should open |
| A. | exactly at the start of suction stroke |
| B. | slightly after the start of suction stroke |
| C. | slightly before the start of the suction stroke |
| D. | none of the above |
| E. | None of the above |
| Answer» D. none of the above | |