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.
| 301. |
*/*_The specific gravity of acid in a fully charged battery is generally? |
| A. | 1.00 |
| B. | 1.28 |
| C. | 1.82 |
| D. | 2.81 |
| Answer» C. 1.82 | |
| 302. |
*/*_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 | |
| 303. |
*/*_The commonly used antifreeze solution in automobiles is? |
| A. | Carbon disulphide |
| B. | Ethylene glycol |
| C. | Ammonium chloride |
| D. | Freon-12 |
| Answer» C. Ammonium chloride | |
| 304. |
*/*_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 | |
| 305. |
*/*_The positive 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» B. Spongy lead (Pb) | |
| 306. |
*/*_Which one of the following statements correctly describes the construction of a planetary gear type differential?? |
| A. | The six planetary pinions rotate in constant mesh with the internal gears. |
| B. | One drive shaft is splined to the central gear and the other to the planetary gear. |
| C. | Each planetary pinion gear meshes with both the central gear and the internal gear. |
| D. | The internal gear is fixed to the planetary gear. |
| Answer» C. Each planetary pinion gear meshes with both the central gear and the internal gear. | |
| 307. |
*/*_Bead wires are made of? |
| A. | Steel |
| B. | Copper |
| C. | Zinc |
| D. | Aluminium |
| Answer» B. Copper | |
| 308. |
*/*_The main feature of Macpherson strut suspension is that? |
| A. | The vertical size of the suspension can be made more compact |
| B. | Non vertical external forces are supported by the suspension arms |
| C. | The unsprung mass in lighter |
| D. | The assembly is slightly more complicated in design |
| Answer» C. The unsprung mass in lighter | |
| 309. |
*/*_In a Diesel engine, the fuel is ignited by? |
| A. | An electric spark |
| B. | The heat of compression |
| C. | The hot exhaust |
| D. | None of these |
| Answer» C. The hot exhaust | |
| 310. |
*/*_Valve overlap is the number of degrees of camshaft rotation during which? |
| A. | Both valves are closed |
| B. | Both valves are open |
| C. | Both 'A' and 'B' |
| D. | None of these |
| Answer» C. Both 'A' and 'B' | |
| 311. |
%_In a Diesel engine, the fuel is ignited by_% |
| A. | An electric spark |
| B. | The heat of compression |
| C. | The hot exhaust |
| D. | None of these |
| Answer» C. The hot exhaust | |
| 312. |
%_Valve overlap is the number of degrees of camshaft rotation during which_% |
| A. | Both valves are closed |
| B. | Both valves are open |
| C. | Both 'A' and 'B' |
| D. | None of these |
| Answer» C. Both 'A' and 'B' | |
| 313. |
%_Bead wires are made of_% |
| A. | Steel |
| B. | Copper |
| C. | Zinc |
| D. | Aluminium |
| Answer» B. Copper | |
| 314. |
%_The main feature of Macpherson strut suspension is that_% |
| A. | The vertical size of the suspension can be made more compact |
| B. | Non vertical external forces are supported by the suspension arms |
| C. | The unsprung mass in lighter |
| D. | The assembly is slightly more complicated in design |
| Answer» C. The unsprung mass in lighter | |
| 315. |
%_Which one of the following statements correctly describes the construction of a planetary gear type differential?_% |
| A. | The six planetary pinions rotate in constant mesh with the internal gears. |
| B. | One drive shaft is splined to the central gear and the other to the planetary gear. |
| C. | Each planetary pinion gear meshes with both the central gear and the internal gear. |
| D. | The internal gear is fixed to the planetary gear. |
| Answer» C. Each planetary pinion gear meshes with both the central gear and the internal gear. | |
| 316. |
_ In a hydraulic power steering system, the power steering pump is driven by a$? |
| A. | Belt driven by camshaft |
| B. | Chain driven by crankshaft |
| C. | Belt driven by drive-shaft |
| D. | Belt driven by crankshaft |
| Answer» E. | |
| 317. |
_ Engine misfiring is likely to result from$? |
| 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 | |
| 318. |
_ The characteristic that is enhanced by the use of cylinder sleeves is$? |
| A. | Cooling efficiency |
| B. | Resistance to wear |
| C. | Lubrication performance |
| D. | None of these |
| Answer» C. Lubrication performance | |
| 319. |
_ The cetane number of a Diesel fuel is a measure of$? |
| A. | Volatility |
| B. | Viscosity |
| C. | Ignition quality |
| D. | Delay period |
| Answer» E. | |
| 320. |
_ In Spark Ignition Engine$? |
| A. | Only air is introduced into the cylinder |
| B. | The mixture of air and fuel is introduced into the cylinder from carburettor |
| C. | Both (A) and (B) |
| D. | None of these |
| Answer» C. Both (A) and (B) | |
| 321. |
_ The cam shaft in an engine is always mounted$? |
| A. | Parallel to the crankshaft |
| B. | Perpendicular to the crankshaft |
| C. | Inclined to the crankshaft |
| D. | None of these |
| Answer» B. Perpendicular to the crankshaft | |
| 322. |
_ In aluminium cylinder blocks, the cylinder liners are made of$? |
| A. | Aluminium |
| B. | Ceramic |
| C. | Brass |
| D. | Cast iron |
| Answer» E. | |
| 323. |
_ The purpose of a balancer shaft is to$? |
| A. | Balance the timing in the movement of the two groups of pistons |
| B. | Increase inertia force of the rotating crankshaft |
| C. | Reduce vibrations caused by the crankshaft rotation |
| D. | Adjusts the timing of the intake and exhaust valve openings |
| Answer» D. Adjusts the timing of the intake and exhaust valve openings | |
| 324. |
_ The specific gravity of petrol is about$? |
| A. | 0.75 |
| B. | 0.85 |
| C. | 0.95 |
| D. | 1.25 |
| Answer» B. 0.85 | |
| 325. |
_ The size of engine cylinder is referred in terms of its$? |
| A. | Diameter and bore |
| B. | Displacement and efficiency |
| C. | Bore and stroke |
| D. | Bore and length |
| Answer» D. Bore and length | |
| 326. |
_ The engine oil is stored in _________ when the engine is not running.$? |
| A. | Oil pan |
| B. | Cylinder head |
| C. | Oil pump |
| D. | Separate oil tank |
| Answer» B. Cylinder head | |
| 327. |
_ The function of a connecting rod is$? |
| 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. | |
| 328. |
_ The firing order for an inline four cylinder I.C. engine is$? |
| A. | 1-2-3-4 |
| B. | 1-3-4-2 |
| C. | 1-2-4-3 |
| D. | 1-3-2-4 |
| Answer» C. 1-2-4-3 | |
| 329. |
_ If clearance volume of I.C. engines is increased, the compression ratio will$? |
| A. | Increase |
| B. | Decrease |
| C. | Remain constant |
| D. | Be doubled |
| Answer» C. Remain constant | |
| 330. |
_ An overinflated tyre will wear the tread most near the$? |
| A. | Edges |
| B. | Corners |
| C. | Centre |
| D. | None of these |
| Answer» D. None of these | |
| 331. |
_ If the air-fuel mixture in a spark ignition engine is too rich, then air-fuel ratio is about$? |
| A. | 17:1 |
| B. | 15:1 |
| C. | 13:1 |
| D. | 10:1 |
| Answer» E. | |
| 332. |
_ If the air-fuel mixture ignites before the spark takes place at spark plug, the condition is called$? |
| A. | Detonation |
| B. | Ignition |
| C. | Pre-ignition |
| D. | Rumble |
| Answer» D. Rumble | |
| 333. |
_ The fuel that detonates easily, is$? |
| A. | N-heptane |
| B. | Iso-octane |
| C. | Benzene |
| D. | Alcohol |
| Answer» B. Iso-octane | |
| 334. |
_ Which of the following is not an automobile?$? |
| A. | Motor cycle |
| B. | Passenger car |
| C. | Aeroplane |
| D. | Truck |
| Answer» D. Truck | |
| 335. |
_ The main function of intake manifold is that it$? |
| A. | Promotes the mixture of air and fuel |
| B. | Reduces intake noise |
| C. | Cools the intake air to a suitable temperature |
| D. | Distributes intake air equally to the cylinders |
| Answer» E. | |
| 336. |
_ The advantage of having a tandem master cylinder arrangement in automobiles is that it$? |
| A. | Enhances safety by serving two independent lines in a divided line brake circuit |
| B. | Enhances safety by activating the brakes using vacuum pressure in the event of brake fluid loss |
| C. | Supplies equal fluid pressure to each line of a divided line brake circuit, thereby preventing the brakes from dragging on one side |
| D. | Boosts the brake fluid pressure to reduce the force required to depress the brake pedal |
| Answer» B. Enhances safety by activating the brakes using vacuum pressure in the event of brake fluid loss | |
| 337. |
_ The function of a governor in automobiles is to$? |
| 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 | |
| 338. |
_ The self ignition temperature of Diesel as compared to petrol is$? |
| A. | Higher |
| B. | Lower |
| C. | Same |
| D. | Depends on fuel quality |
| Answer» C. Same | |
| 339. |
_ In order to implement gear changes in the gear unit of an automatic transmission, a ___________ is used.$? |
| A. | Synchronizer |
| B. | Planetary gear |
| C. | Magnetic clutch |
| D. | Hydraulic multi plate clutch |
| Answer» E. | |
| 340. |
_ Which of the following symptom is caused as a result of brake disc run out?$? |
| A. | Ineffectiveness of the brakes |
| B. | Judder during braking |
| C. | Localized wearing of the brake pads |
| D. | Rapid wearing of the brake pads |
| Answer» C. Localized wearing of the brake pads | |
| 341. |
_ The order in which effort applied to the steering wheel is transferred to the front wheel is$? |
| A. | Steering wheel, steering gearbox, steering shaft, tie rod, steering knuckle, front wheels |
| B. | Steering wheel, steering shaft, steering gearbox, tie rod, steering knuckle, front wheels |
| C. | Steering wheel, steering shaft, steering gearbox, steering knuckle, tie rod, front wheels |
| D. | Steering wheel, tie rod, steering gearbox, steering shaft, steering knuckle, front wheels |
| Answer» C. Steering wheel, steering shaft, steering gearbox, steering knuckle, tie rod, front wheels | |
| 342. |
_ The motion of the cam is transferred to the valves through$? |
| A. | Pistons |
| B. | Rocker arms |
| C. | Camshaft pulley |
| D. | Valve stems |
| Answer» C. Camshaft pulley | |
| 343. |
_ The battery is an electrochemical device, which means battery$? |
| A. | Makes chemicals by mechanical means |
| B. | Uses chemical action to provide electricity |
| C. | Has curved plates instead of flat plates |
| D. | Does not use an electrolyte |
| Answer» C. Has curved plates instead of flat plates | |
| 344. |
_ The starting system includes$? |
| A. | A battery, a starter, and an ignition switch |
| B. | A battery, a distributor, and an ignition switch |
| C. | A battery, a starter, and a distributor |
| D. | A distributor, a starter, and an ignition switch |
| Answer» B. A battery, a distributor, and an ignition switch | |
| 345. |
_ The discharged lead acid battery has on its plates$? |
| A. | Lead peroxide (PbO‚ÇÇ) |
| B. | Spongy lead (Pb) |
| C. | Lead sulphate (PbSO‚ÇÑ) |
| D. | Sulphuric acid (H‚ÇÇSO‚ÇÑ) |
| Answer» D. Sulphuric acid (H‚Äö√á√áSO‚Äö√á√ë) | |
| 346. |
_ The valve overlap in four stroke petrol engines is approximately$? |
| A. | 30° |
| B. | 60° |
| C. | 90° |
| D. | 120° |
| Answer» B. 60¬¨‚àû | |
| 347. |
_ The effect of having excess camber is$? |
| A. | Excessive steering alignment torque |
| B. | Hard steering |
| C. | Too much traction |
| D. | Uneven tyre wear |
| Answer» E. | |
| 348. |
_ The power source for a brake booster is$? |
| A. | Exhaust manifold pressure |
| B. | Electricity |
| C. | The pressure difference between the atmospheric pressure and the vacuum pressure in the intake manifold |
| D. | Hydraulic pump |
| Answer» D. Hydraulic pump | |
| 349. |
_ The basic part of the engine, to which the other engine parts are attached or assembled is the$? |
| A. | Cylinder head |
| B. | Crankshaft |
| C. | Cylinder block |
| D. | Oil pan |
| Answer» D. Oil pan | |
| 350. |
_ When indicated power (I.P.) and frictional power (F.P.) are known, we can calculate$? |
| A. | Brake power |
| B. | Compression ratio |
| C. | Specific air consumption |
| D. | Mean effective pressure |
| Answer» B. Compression ratio | |