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.
| 501. |
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 | |
| 502. |
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 √ó P.L.A.N |
| D. | P.L.A.N/4 |
| Answer» B. P.L.A.N | |
| 503. |
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 | |
| 504. |
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 | |
| 505. |
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 | |
| 506. |
In a four wheel drive (4WD), the numbers of gear boxes are |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 507. |
The maximum torque multiplication ratio in a torque converter is about |
| A. | 2.5 |
| B. | 10 |
| C. | 25 |
| D. | 40 |
| Answer» B. 10 | |
| 508. |
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 | |
| 509. |
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 | |
| 510. |
Highest useful compression ratio (HUCR) is the highest compression ratio at which the |
| A. | Engine can run |
| B. | Engine gives maximum output |
| C. | Engine is most efficient |
| D. | Fuel can be used in a test engine without knocking |
| Answer» E. | |
| 511. |
A worm gear is used as the pinion for the rack and pinion type of steering gearbox, because it |
| A. | Improves steering comfort when steering wheel is turned to effect small changes in the direction of forward motion |
| B. | Allows the steering wheel to be turned by a greater amount when steering |
| C. | Makes the steering more responsive |
| D. | Reduces the amount of kickback for large steering angles |
| Answer» B. Allows the steering wheel to be turned by a greater amount when steering | |
| 512. |
If the engine coolant leaks into the engine oil, then engine oil |
| A. | Appears milky |
| B. | Become foamy |
| C. | Turns black |
| D. | None of these |
| Answer» B. Become foamy | |
| 513. |
The camshaft of a four stroke Diesel engine running at 1000 rpm will run at |
| A. | 500 rpm |
| B. | 1000 rpm |
| C. | 2000 rpm |
| D. | 4000 rpm |
| Answer» B. 1000 rpm | |
| 514. |
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 | |
| 515. |
The connecting rod connects the piston and the |
| A. | Cylinder head |
| B. | Cylinder block |
| C. | Camshaft |
| D. | Crankshaft |
| Answer» E. | |
| 516. |
The ignition in a spark ignition engine takes place when the piston is |
| A. | Exactly at the T.D.C. position on its compression stroke |
| B. | Approaching the T.D.C. position on its compression stroke |
| C. | Leaving the T.D.C. position on its compression stroke |
| D. | Approaching the T.D.C position on its exhaust stroke |
| Answer» C. Leaving the T.D.C. position on its compression stroke | |
| 517. |
The formula for Iso-octane is |
| A. | C8H18 |
| B. | C7H17 |
| C. | C6H18 |
| D. | C7H18 |
| Answer» B. C7H17 | |
| 518. |
The tyre rotation is generally done at |
| A. | 1000 km |
| B. | 4000 km |
| C. | 6000 km |
| D. | 10,000 km |
| Answer» E. | |
| 519. |
In Diesel engines, during suction stroke, _________ is drawn in the cylinder. |
| A. | Air and fuel |
| B. | Only fuel |
| C. | Only air |
| D. | None of these |
| Answer» D. None of these | |
| 520. |
Petrol that detonates easily is called |
| A. | High octane petrol |
| B. | Low octane petrol |
| C. | Unleaded petrol |
| D. | Blended fuel |
| Answer» C. Unleaded petrol | |
| 521. |
The function of an alternator in an automobile is to |
| A. | Supply electric power |
| B. | Converts mechanical energy into electrical energy |
| C. | Continually recharges the battery |
| D. | Partly converts engine power into electric power |
| Answer» D. Partly converts engine power into electric power | |
| 522. |
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 | |
| 523. |
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. | |
| 524. |
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 | |
| 525. |
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 | |
| 526. |
The oil pump is driven by the |
| A. | Camshaft |
| B. | Alternator shaft |
| C. | Crankshaft via drive belt |
| D. | Crankshaft directly |
| Answer» E. | |
| 527. |
The brake warning light warns the driver of |
| A. | Water in the master cylinder |
| B. | Air in the hydraulic system |
| C. | Failure of the primary or secondary circuit of hydraulic system |
| D. | Power brake failure |
| Answer» D. Power brake failure | |
| 528. |
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¬¨‚àû | |
| 529. |
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. | |
| 530. |
The function of positive crankcase ventilation (PCV) system is that it |
| A. | Mixes fuel with air |
| B. | Promotes combustion by creating a swirling movement in the air-fuel mixture |
| C. | Returns blow by gases from the crankcase to the intake system |
| D. | Feeds blow by gases to the exhaust manifold |
| Answer» D. Feeds blow by gases to the exhaust manifold | |
| 531. |
The main function of an exhaust muffler is the |
| A. | Optimization of exhaust efficiency |
| B. | Reduction of exhaust noise |
| C. | Reduction of nitrogen oxide in the exhaust gases |
| D. | Reduction of the exhaust gas volume |
| Answer» C. Reduction of nitrogen oxide in the exhaust gases | |
| 532. |
The crankcase dilution means |
| A. | Dilution of fuel in the crankcase |
| B. | Dilution of oil by water in the crankcase |
| C. | Dilution of lubrication oil by fuel in the crankcase |
| D. | Dilution of mixture passing through crankcase in two stroke engines |
| Answer» D. Dilution of mixture passing through crankcase in two stroke engines | |
| 533. |
In a petrol engine, the high voltage for spark plug is in the order of |
| A. | 1000 volts |
| B. | 2000 volts |
| C. | 11 kilovolts |
| D. | 22 kilovolts |
| Answer» E. | |
| 534. |
Which of the following is not a part of the chassis? |
| A. | Wheels |
| B. | Front axle |
| C. | Steering system |
| D. | Seats |
| Answer» E. | |
| 535. |
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 | |
| 536. |
In a ventilated disc brake |
| A. | A duct directs air towards the caliper for cooling while the vehicle is moving |
| B. | Caliper is covered with cooling fins |
| C. | Disc contains many small holes for optimum cooling performance |
| D. | Disc contains radial vanes between its rubbing surfaces for optimum cooling performance |
| Answer» E. | |
| 537. |
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 | |
| 538. |
The function of anti-lock brake system (ABS) is that is |
| A. | Reduces the stopping distance |
| B. | Minimizes the brake fade |
| C. | Maintains directional control during braking by preventing the wheels from locking |
| D. | Prevents nose dives during braking and thereby postpones locking of the wheels |
| Answer» D. Prevents nose dives during braking and thereby postpones locking of the wheels | |