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.
| 251. |
The most 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 |
| Answer» D. Magneto and electronic system | |
| 252. |
The tyre rotation is generally done at |
| A. | 1000 km |
| B. | 4000 km |
| C. | 6000 km |
| D. | 10,000 km |
| Answer» E. | |
| 253. |
The parking brake generally acts on |
| A. | Front wheels |
| B. | Rear wheels |
| C. | Front and rear wheels |
| D. | Propeller shaft |
| Answer» C. Front and rear wheels | |
| 254. |
The starting system includes |
| A. | A battery, a starter, and an ignition switch |
| B. | A battery, a distributor, and an ignition switch |
| C. | A battery, a starter, and a distributor |
| D. | A distributor, a starter, and an ignition switch |
| Answer» B. A battery, a distributor, and an ignition switch | |
| 255. |
The function of a second ring is that it is a |
| A. | Back up compression ring which will work in place of the top ring when it is broken |
| B. | Compression ring and aids the top ring in sealing and cooling |
| C. | Back up oil control ring which will work in place of the bottom ring when it is broken |
| D. | Cushion ring which prevents piston slap and knock |
| Answer» C. Back up oil control ring which will work in place of the bottom ring when it is broken | |
| 256. |
The mechanical 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. |
| Answer» C. B.P/F.P. | |
| 257. |
The formula for Iso-octane is |
| A. | C8H18 |
| B. | C7H17 |
| C. | C6H18 |
| D. | C7H18 |
| Answer» B. C7H17 | |
| 258. |
The calorific value of Diesel is about |
| A. | 36.5 MJ/kg |
| B. | 38.5 MJ/kg |
| C. | 42.5 MJ/kg |
| D. | 45.5 MJ/kg |
| Answer» D. 45.5 MJ/kg | |
| 259. |
If clearance volume of I.C. engines is increased, the compression ratio will |
| A. | Increase |
| B. | Decrease |
| C. | Remain constant |
| D. | Be doubled |
| Answer» C. Remain constant | |
| 260. |
The capacity of a battery is usually expressed in terms of |
| A. | Volts |
| B. | Amperes |
| C. | Weight |
| D. | Ampere hours |
| Answer» E. | |
| 261. |
The rating of C.I. engine fuel (Diesel) is given by |
| A. | Octane number |
| B. | Performance number |
| C. | Cetane number |
| D. | None of these |
| Answer» D. None of these | |
| 262. |
The indicated power of a four stroke engine (in watts) is equal to (where P = Mean effective pressure in N/m², L = Length of stroke in metres, A = Cross-sectional area of the piston in m², and N = Speed of the engine in revolutions per second (r.p.s) |
| A. | P.L.A.N/2 |
| B. | P.L.A.N |
| C. | 2 × P.L.A.N |
| D. | P.L.A.N/4 |
| Answer» B. P.L.A.N | |
| 263. |
The firing 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 |
| Answer» D. 1-3-2-4 | |
| 264. |
The firing order for an inline four cylinder I.C. engine is |
| A. | 1-2-3-4 |
| B. | 1-3-4-2 |
| C. | 1-2-4-3 |
| D. | 1-3-2-4 |
| Answer» C. 1-2-4-3 | |
| 265. |
The main function of a master cylinder is to |
| A. | Adjust the extent of brake pedal free play |
| B. | Boost the force applied to brake pedal |
| C. | Convert brake pedal force into hydraulic pressure |
| D. | Ensure that all the wheel brakes are supplied with the same amount of fluid pressure |
| Answer» D. Ensure that all the wheel brakes are supplied with the same amount of fluid pressure | |
| 266. |
A front stabilizer bar is used to |
| A. | Increase vehicle load carrying capacity |
| B. | Provide a softer ride |
| C. | Control suspension movement and body roll |
| D. | All of the above |
| Answer» D. All of the above | |
| 267. |
The basic part of the engine, to which the other engine parts are attached or assembled is the |
| A. | Cylinder head |
| B. | Crankshaft |
| C. | Cylinder block |
| D. | Oil pan |
| Answer» D. Oil pan | |
| 268. |
The seat belt tensioners are built in the |
| A. | Front seats |
| B. | Shoulder anchors |
| C. | Seat belt retractors |
| D. | Seat belt buckles |
| Answer» D. Seat belt buckles | |
| 269. |
The stroke of an engine is the |
| A. | Volume of the cylinder |
| B. | Length of the connecting rod |
| C. | Internal diameter of the cylinder |
| D. | Distance between T.D.C. and B.D.C. |
| Answer» E. | |
| 270. |
The purpose of transmission in an automobile is |
| A. | To vary the speed of automobile |
| B. | To vary the torque at the wheels |
| C. | To vary the power of automobile |
| D. | None of these |
| Answer» C. To vary the power of automobile | |
| 271. |
The service brakes employed in cars are generally operated |
| A. | Mechanically |
| B. | Hydraulically |
| C. | Pneumatically |
| D. | None of these |
| Answer» C. Pneumatically | |
| 272. |
In a Diesel engine, the function of a fuel injector is to |
| A. | Mix the fuel and air |
| B. | Ignite the air-fuel mixture |
| C. | Provide flame front for ignition |
| D. | Spray atomized fuel in the cylinder |
| Answer» E. | |
| 273. |
The problems caused by the wheel imbalance are |
| A. | Hard steering and hard ride |
| B. | Poor acceleration and hard steering |
| C. | Steering wheel vibrations and uneven tyre wear |
| D. | Poor acceleration and reduced fuel efficiency |
| Answer» D. Poor acceleration and reduced fuel efficiency | |
| 274. |
The connecting rods are generally made of __________ shaped cross-section. |
| A. | I |
| B. | C |
| C. | L |
| D. | H |
| Answer» B. C | |
| 275. |
An overinflated tyre will wear the tread most near the |
| A. | Edges |
| B. | Corners |
| C. | Centre |
| D. | None of these |
| Answer» D. None of these | |
| 276. |
Instead of valves, the ports are used in case of |
| A. | Four stroke I.C. engines |
| B. | Two stroke I.C. engines |
| C. | V6 engines |
| D. | None of these |
| Answer» C. V6 engines | |
| 277. |
The coefficient 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 |
| Answer» E. | |
| 278. |
The basic purpose of providing caster angle on wheels is to |
| A. | Prevent uneven tyre wear |
| B. | Maintain directional control |
| C. | Bring the road contact of the tyre under the point of load |
| D. | Compensate for wear in the steering linkage |
| Answer» C. Bring the road contact of the tyre under the point of load | |
| 279. |
The major purpose of an electronically controlled automatic transmission is that this type of transmission |
| A. | Eliminates gear clutches |
| B. | Eliminates the gear shaft lever |
| C. | Reduces the number of automatic transmission components |
| D. | Reduces shift shock and achieves more efficient transmission of engine torque |
| Answer» E. | |
| 280. |
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 | |
| 281. |
For the same maximum pressure and temperature |
| A. | Diesel cycle is more efficient than Otto cycle |
| B. | Otto cycle is more efficient than Diesel cycle |
| C. | Both Otto cycle and Diesel cycle are equally efficient |
| D. | None of the above |
| Answer» B. Otto cycle is more efficient than Diesel cycle | |
| 282. |
A petrol engine of a car develops 125 Nm torque at 2700 r.p.m. The car is driven in second gear having gear ratio of 1.75. The final drive ratio is 4.11. If the overall transmission efficiency is 90%, then the torque available at the driving wheels is |
| A. | 8.091 Nm |
| B. | 80.91 Nm |
| C. | 809.1 Nm |
| D. | 8091 Nm |
| Answer» D. 8091 Nm | |
| 283. |
When the brake pedal free play is less than the specified value, then the |
| A. | Brake drags |
| B. | Brake fades |
| C. | Vapour locking occurs in the brake lines |
| D. | Antilock braking system malfunctions |
| Answer» B. Brake fades | |
| 284. |
Clutch facings are usually attached to the plate by |
| A. | Steel rivets |
| B. | Brass rivets |
| C. | Aluminium screws |
| D. | Steel screws |
| Answer» C. Aluminium screws | |
| 285. |
The size 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 |
| Answer» D. Bore and length | |
| 286. |
The instrument used to check specific gravity of acid in a battery is |
| A. | Hydrometer |
| B. | Hygrometer |
| C. | Anemometer |
| D. | Multimeter |
| Answer» B. Hygrometer | |
| 287. |
The composition of the electrolyte in a fully charged battery is that |
| A. | The electrolyte is pure distilled water |
| B. | The electrolyte is pure sulphuric acid |
| C. | The electrolyte is a mixture of 64% distilled water and 36% sulphuric acid by weight |
| D. | The electrolyte is a mixture of 90% distilled water and 10% sulphuric acid by weight |
| Answer» D. The electrolyte is a mixture of 90% distilled water and 10% sulphuric acid by weight | |
| 288. |
The aspect ratio (expressed in percentage) of the tyre is defined as the ratio of |
| A. | Section width to section height |
| B. | Section height to section width |
| C. | Wheel diameter to section height |
| D. | Wheel diameter to section width |
| Answer» C. Wheel diameter to section height | |
| 289. |
Caster is a |
| A. | Forward tilt of the kingpin |
| B. | Backward tilt of the kingpin |
| C. | Either 'A' or 'B' |
| D. | None of these |
| Answer» D. None of these | |
| 290. |
The process of removing the burnt gases from the engine cylinder by the fresh charge coming into the engine cylinder from the crankcase, is known as |
| A. | Cleaning |
| B. | Priming |
| C. | Scavenging |
| D. | Detonation |
| Answer» D. Detonation | |
| 291. |
A battery can be charged by |
| A. | Adding distilled water |
| B. | Adding sulphuric acid |
| C. | Applying voltage in the reverse direction to that of charging |
| D. | Applying a voltage in the same direction to that of charging |
| Answer» D. Applying a voltage in the same direction to that of charging | |
| 292. |
In a four stroke engine for each crankshaft revolution, the camshaft revolves |
| A. | One half turn |
| B. | One turn |
| C. | Two turns |
| D. | Four turns |
| Answer» B. One turn | |
| 293. |
The vehicle 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 |
| Answer» B. Sprang mass is kept minimum | |
| 294. |
The rolling resistance is because of the friction between the |
| A. | Wheel rim and tyre |
| B. | Tyre and the road surface |
| C. | Wheel rim and road surface |
| D. | None of these |
| Answer» C. Wheel rim and road surface | |
| 295. |
The function of a connecting rod is |
| A. | To turn the flywheel |
| B. | To drive the drive plate |
| C. | To drive the fuel pump |
| D. | To transmit motion of the piston to the crankshaft |
| Answer» E. | |
| 296. |
Free pedal play in car clutches is about |
| A. | 15 mm |
| B. | 25 mm |
| C. | 40 mm |
| D. | 60 mm |
| Answer» C. 40 mm | |
| 297. |
The parking brakes employed in vehicles are operated |
| A. | Mechanically |
| B. | Hydraulically |
| C. | Pneumatically |
| D. | None of these |
| Answer» B. Hydraulically | |
| 298. |
The valve tappet clearance is measured by |
| A. | Screw pitch gauge |
| B. | Engineering scale |
| C. | Feeler gauge |
| D. | Vernier caliper |
| Answer» D. Vernier caliper | |
| 299. |
The basic purpose of tyre rotation on automobiles is to |
| A. | Avoid ply separation |
| B. | Equalize wear |
| C. | Get better ride |
| D. | None of these |
| Answer» C. Get better ride | |
| 300. |
The function 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 |
| Answer» C. Maintain constant engine speed | |