MCQOPTIONS
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MCQOPTIONS
This section includes 538 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 351. |
_ The forced fed lubrication system means that the oil is delivered to the engine by$? |
| A. | Gravity |
| B. | The pressure created by the oil pump |
| C. | Splashing action of the crankshaft |
| D. | None of these |
| Answer» C. Splashing action of the crankshaft | |
| 352. |
_ The function of oil control rings is that it$? |
| 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 | |
| 353. |
_ One effect of detonation is$? |
| A. | Delay in ignition |
| B. | Loss of power |
| C. | Overheating of engine |
| D. | Overcooling of engine |
| Answer» C. Overheating of engine | |
| 354. |
_ The lubrication oil flow in an engine is in the order as$? |
| A. | Oil strainer, oil pump, relief valve, oil filter, cylinder block, cylinder head and oil pan |
| B. | Oil pump, oil strainer, relief valve, oil filter, cylinder block, cylinder head and oil pan |
| C. | Oil strainer, oil filter, relief valve, oil pump, cylinder block, cylinder head and oil pan |
| D. | Oil strainer, oil pump, relief valve, oil filter, cylinder head, cylinder block and oil pan |
| Answer» B. Oil pump, oil strainer, relief valve, oil filter, cylinder block, cylinder head and oil pan | |
| 355. |
_ The piston compression rings are made of$? |
| A. | Cast iron |
| B. | Steel |
| C. | Aluminium |
| D. | Bronze |
| Answer» B. Steel | |
| 356. |
_ The function of a proportioning control valve (PCV) in a brake system is to$? |
| 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. | |
| 357. |
_ Which part of the automobile tyre is subjected to greatest flexing action?$? |
| A. | Bead |
| B. | Side wall |
| C. | Shoulder |
| D. | Tread |
| Answer» C. Shoulder | |
| 358. |
_ In a forced feed lubrication system, the device used to guard against excessive oil pressure, is known as$? |
| A. | Release chamber |
| B. | Balancer |
| C. | Relief valve |
| D. | Stop valve |
| Answer» D. Stop valve | |
| 359. |
_ The most commonly used supplementary restraint system (SRS) component is$? |
| A. | Seat belt |
| B. | Brake |
| C. | Airbag |
| D. | Steering |
| Answer» D. Steering | |
| 360. |
_ The caster is called positive when the top of the king pin is inclined to the$? |
| A. | Rear of the vehicle |
| B. | Front of the vehicle |
| C. | Left of the vehicle |
| D. | Right of the vehicle |
| Answer» B. Front of the vehicle | |
| 361. |
_ The reconditioning process used to give cylinder bore surfaces a crosshatch pattern, is known as$? |
| A. | Honing |
| B. | Porous plating |
| C. | Boring |
| D. | Shot peening |
| Answer» B. Porous plating | |
| 362. |
__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 | |
| 363. |
__The most commonly used power plant in automobiles is__ |
| A. | Gas turbine |
| B. | I.C. engine |
| C. | Battery |
| D. | None of these |
| Answer» C. Battery | |
| 364. |
__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 | |
| 365. |
__The negative plates of a lead acid battery has__ |
| A. | Lead peroxide (PbO‚ÇÇ) |
| B. | Spongy lead (Pb) |
| C. | Lead sulphate (PbSO‚ÇÑ) |
| D. | Sulphuric acid (H‚ÇÇSO‚ÇÑ) |
| Answer» C. Lead sulphate (PbSO‚Äö√á√ë) | |
| 366. |
__With the increase of battery temperature, the specific gravity of electrolyte__ |
| A. | Increases |
| B. | Decreases |
| C. | Remains the same |
| D. | None of these |
| Answer» C. Remains the same | |
| 367. |
__When the top of the wheel is tilted outward, then it is called__ |
| A. | Positive camber |
| B. | Negative camber |
| C. | Positive caster |
| D. | Negative caster |
| Answer» B. Negative camber | |
| 368. |
__Vulcanizing means__ |
| A. | Heating rubber under pressure |
| B. | Spraying with special paint |
| C. | Melting rubber while stirring it |
| D. | None of these |
| Answer» B. Spraying with special paint | |
| 369. |
__The advantage of the fuel injection system over the carburettor system is__ |
| A. | Improved fuel efficiency |
| B. | Improved emission |
| C. | Improved power output |
| D. | All of these |
| Answer» E. | |
| 370. |
__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. | |
| 371. |
_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 | |
| 372. |
_Damper in an automobile is used to$? |
| A. | Absorb the energy |
| B. | Dissipate the energy |
| C. | Release the energy |
| D. | Increase the energy |
| Answer» C. Release the energy | |
| 373. |
_The diagram which shows the correct crank positions corresponding to the opening and closing of the valves, is known as$? |
| A. | Indicator diagram |
| B. | Axial force diagram |
| C. | Valve timing diagram |
| D. | None of these |
| Answer» D. None of these | |
| 374. |
_The component of the oil filter that prevents the passage of metal particles and sludge is$? |
| A. | Element |
| B. | Relief valve |
| C. | Check valve |
| D. | Case |
| Answer» B. Relief valve | |
| 375. |
_The Diesel engines as compared to petrol engines require$? |
| A. | Bigger flywheel |
| B. | Smaller flywheel |
| C. | Same size of flywheel |
| D. | No flywheel |
| Answer» B. Smaller flywheel | |
| 376. |
_The best fuels for compression ignition engines are$? |
| A. | Straight chain paraffin |
| B. | Aromatics |
| C. | Branched chain paraffin |
| D. | Naphthalene |
| Answer» E. | |
| 377. |
_During braking, the brake shoe is moved outward to force the lining against the$? |
| A. | Wheel piston or cylinder |
| B. | Anchor pin |
| C. | Brake drum |
| D. | Wheel rim or axle |
| Answer» D. Wheel rim or axle | |
| 378. |
_The gradient resistance to a vehicle having a mass of 980 kg moving on an incline of 10° is$? |
| A. | 1.6694 N |
| B. | 16.694 N |
| C. | 166.94 N |
| D. | 1669.4 N |
| Answer» E. | |
| 379. |
_The correct way to rectify an imbalanced wheel is to$? |
| 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 |
| Answer» E. | |
| 380. |
_The calorific value of petrol is about$? |
| A. | 36.5-38.5 MJ/kg |
| B. | 39.4-42.5 MJ/kg |
| C. | 42.7-43.5 MJ/kg |
| D. | 45.5-47 MJ/kg |
| Answer» D. 45.5-47 MJ/kg | |
| 381. |
_The instrument used to check specific gravity of acid in a battery is$? |
| A. | Hydrometer |
| B. | Hygrometer |
| C. | Anemometer |
| D. | Multimeter |
| Answer» B. Hygrometer | |
| 382. |
_For the same maximum pressure and temperature$? |
| A. | Diesel cycle is more efficient than Otto cycle |
| B. | Otto cycle is more efficient than Diesel cycle |
| C. | Both Otto cycle and Diesel cycle are equally efficient |
| D. | None of the above |
| Answer» B. Otto cycle is more efficient than Diesel cycle | |
| 383. |
_Free pedal play in car clutches is about$? |
| A. | 15 mm |
| B. | 25 mm |
| C. | 40 mm |
| D. | 60 mm |
| Answer» C. 40 mm | |
| 384. |
_The main function of a master cylinder is to$? |
| A. | Adjust the extent of brake pedal free play |
| B. | Boost the force applied to brake pedal |
| C. | Convert brake pedal force into hydraulic pressure |
| D. | Ensure that all the wheel brakes are supplied with the same amount of fluid pressure |
| Answer» D. Ensure that all the wheel brakes are supplied with the same amount of fluid pressure | |
| 385. |
_The capacity of a battery is usually expressed in terms of$? |
| A. | Volts |
| B. | Amperes |
| C. | Weight |
| D. | Ampere hours |
| Answer» E. | |
| 386. |
_Instead of valves, the ports are used in case of$? |
| A. | Four stroke I.C. engines |
| B. | Two stroke I.C. engines |
| C. | V6 engines |
| D. | None of these |
| Answer» C. V6 engines | |
| 387. |
_In a Diesel engine, the function of a fuel injector is to$? |
| 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. | |
| 388. |
_The frequency of flashing of light per minute in a direction (side turn) indicator is about$? |
| A. | 9 |
| B. | 90 |
| C. | 900 |
| D. | 9000 |
| Answer» C. 900 | |
| 389. |
_When the piston is at T.D.C., the volume above the piston in the combustion chamber is the$? |
| A. | Clearance volume |
| B. | Cylinder volume |
| C. | Exhaust volume |
| D. | None of these |
| Answer» B. Cylinder volume | |
| 390. |
_The lower cylindrical portion of the piston which improves piston cooling performance is called$? |
| A. | Piston crown |
| B. | Connecting rod |
| C. | Piston pin boss |
| D. | Piston skirt |
| Answer» E. | |
| 391. |
_A basic difference between the spark ignition engine and the Diesel engine is that the$? |
| 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. | |
| 392. |
_The painting of automobiles is done to$? |
| A. | Prevent rust from growing on the body |
| B. | Improve its external appearance |
| C. | Retain the characteristics of steel for long |
| D. | All of these |
| Answer» E. | |
| 393. |
_The main task of a battery in automobiles is to$? |
| A. | Supply electricity to the alternator |
| B. | Act as a reservoir or stabilizer of electricity |
| C. | Supply electricity to the vehicle's electrical system at all times while the engine is running |
| D. | Supply a large amount of power to turn the starter motor when the engine is being started |
| Answer» E. | |
| 394. |
_The Diesel engines are also known as$? |
| A. | Spark ignition (S.I.) engines |
| B. | Compression ignition (C.I.) engines |
| C. | Steam engines |
| D. | None of these |
| Answer» C. Steam engines | |
| 395. |
_A heat treated glass generally used in automobiles bursts into ________ upon cracking,$? |
| A. | Sharp edged fragments |
| B. | Small particles |
| C. | Large particles |
| D. | None of these |
| Answer» C. Large particles | |
| 396. |
_The condition that causes vapour locking in a brake system is$? |
| A. | Overheating of the fluid due to frequent brake application |
| B. | Overcooling of the brakes during high speed driving |
| C. | Keeping the vehicle without use for an extended period |
| D. | An excessively high engine speed on a downhill road |
| Answer» B. Overcooling of the brakes during high speed driving | |
| 397. |
The gear shift lever requires two separate motions to shift gears, and the first movement$? |
| A. | Moves the synchronizer |
| B. | Selects the synchronizer |
| C. | Meshes the gears |
| D. | Operates the clutch |
| Answer» C. Meshes the gears | |
| 398. |
The temperature indicating instrument in vehicles indicates the temperature of$? |
| A. | Engine piston |
| B. | Engine cylinder |
| C. | Lubricating oil |
| D. | Jacket cooling water |
| Answer» E. | |
| 399. |
The damper fluid leakage typically occur from$? |
| A. | Upper damper mounting |
| B. | Bottom of damper |
| C. | Clearance between inner and outer tubes of damper |
| D. | Coil spring mounting |
| Answer» D. Coil spring mounting | |
| 400. |
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 | |