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.
| 251. |
*$_The temperature at which tyre inflation pressure should be checked is? |
| A. | 20°C |
| B. | 25°C |
| C. | 35°C |
| D. | Ambient temperature |
| Answer» E. | |
| 252. |
*$_The auto ignition in a spark ignition engine means? |
| A. | Automatic ignition of the charge at the end of compression |
| B. | Ignition induced by the passage of a spark |
| C. | Ignition of the charge before the passage of flame front |
| D. | Ignition induced to supplement the process of normal combustion |
| Answer» D. Ignition induced to supplement the process of normal combustion | |
| 253. |
*$_In which of the following conditions, the idle CO percentage should be measured with the vehicle?? |
| A. | Headlights and other electrical devices are switched off |
| B. | Headlights and other electrical devices are switched on |
| C. | Headlights and other lights are switched off |
| D. | Headlights are switched on |
| Answer» B. Headlights and other electrical devices are switched on | |
| 254. |
*$_An oil filter bypass valve opens when the? |
| A. | Engine is cold |
| B. | Engine overheats |
| C. | Oil filter becomes clogged |
| D. | Engine runs at high speed |
| Answer» D. Engine runs at high speed | |
| 255. |
*$_Two general types of tyres are? |
| A. | Tube type and tubeless |
| B. | Solid and tubeless |
| C. | Air and pneumatic |
| D. | Split rim and drop centre |
| Answer» B. Solid and tubeless | |
| 256. |
*$_In a four cylinder inline engine, the number of firing strokes in one revolution of the crank is? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 257. |
*$_The antiknock property of compression ignition engine fuel can be improved by adding? |
| A. | Tetraethyl lead |
| B. | Trimethyl pentane |
| C. | Amyl nitrate |
| D. | Hexadecane |
| Answer» D. Hexadecane | |
| 258. |
*$_A clutch is usually designed to transmit maximum torque which is? |
| A. | Equal to the maximum engine torque |
| B. | 80% of the maximum engine torque |
| C. | 150% of the maximum engine torque |
| D. | None of these |
| Answer» D. None of these | |
| 259. |
*$_The material generally used for cylinder sleeves is? |
| A. | Aluminium |
| B. | Ceramic |
| C. | Cast iron |
| D. | Fibre reinforced plastic |
| Answer» D. Fibre reinforced plastic | |
| 260. |
*$_The sequence in which the force is transmitted through a brake system when the brake pedal is depressed is? |
| A. | Brake pedal, master cylinder, brake lines, vacuum servo mechanism, brake pads |
| B. | Brake pedal, vacuum servo mechanism, master cylinder, brake lines, brake pads |
| C. | Brake pedal, master cylinder, vacuum servo mechanism, brake lines, brake pads |
| D. | Brake pedal, brake lines, vacuum servo mechanism, master cylinder, brake pads |
| Answer» C. Brake pedal, master cylinder, vacuum servo mechanism, brake lines, brake pads | |
| 261. |
*$_The exhaust gas from petrol engine contains? |
| A. | Petrol vapours |
| B. | Water vapours |
| C. | Carbon monoxide |
| D. | All of these |
| Answer» E. | |
| 262. |
*$_The included angle is the sum of the? |
| A. | Camber and castor |
| B. | Castor and S.A.I. |
| C. | Camber and S.A.I. |
| D. | Camber and toe in |
| Answer» D. Camber and toe in | |
| 263. |
*$_The brake pedal during ABS operation? |
| A. | Is pushed upward forcefully |
| B. | Pedal stroke becomes longer |
| C. | Transmits slight kickback to the driver's foot |
| D. | All of the above |
| Answer» D. All of the above | |
| 264. |
*$_An under-inflated tyre will wear the tread most? |
| A. | Near the centre |
| B. | Near the edges |
| C. | In the lateral direction |
| D. | In the cross direction |
| Answer» C. In the lateral direction | |
| 265. |
*/*_The crescent shaped cavity on the piston head top surface is called as? |
| A. | Piston oil hole |
| B. | Snap ring |
| C. | Valve recess |
| D. | Valve clearance |
| Answer» D. Valve clearance | |
| 266. |
*/*_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 | |
| 267. |
*/*_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. | |
| 268. |
*/*_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 | |
| 269. |
*/*_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 | |
| 270. |
*/*_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 | |
| 271. |
*/*_The connecting rods are generally made of __________ shaped cross-section.? |
| A. | I |
| B. | C |
| C. | L |
| D. | H |
| Answer» B. C | |
| 272. |
*/*_The service brakes employed in cars are generally operated? |
| A. | Mechanically |
| B. | Hydraulically |
| C. | Pneumatically |
| D. | None of these |
| Answer» C. Pneumatically | |
| 273. |
*/*_The ball joints are used on the tie rod ends, because they? |
| A. | Reduce the amount of noise generated |
| B. | Reduce the amount of sliding resistance |
| C. | Can deal with movement of the suspension both vertically and in other directions |
| D. | Improve the force transmission speed |
| Answer» D. Improve the force transmission speed | |
| 274. |
*/*_The main function of a resonator is that it? |
| A. | Regulates the intake air flow rate |
| B. | Reduces the intake air noise |
| C. | Enhances intake efficiency |
| D. | Regulates the intake air temperature |
| Answer» C. Enhances intake efficiency | |
| 275. |
*/*_The three basic cylinder arrangements for automotive engines are? |
| A. | Flat, radial, and V |
| B. | In a row, in line, and opposed |
| C. | In line, V, and opposed |
| D. | V, double row, and opposed |
| Answer» D. V, double row, and opposed | |
| 276. |
*/*_The clutch is located between the transmission and the? |
| A. | Engine |
| B. | Rear axle |
| C. | Propeller shaft |
| D. | Differential |
| Answer» B. Rear axle | |
| 277. |
*/*_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 | |
| 278. |
*/*_A laminated glass upon cracking? |
| A. | Bursts into sharp edged fragments |
| B. | Bursts into granular pieces |
| C. | Sandwiched layer traps the fragments |
| D. | Breaks into the form of crystals |
| Answer» D. Breaks into the form of crystals | |
| 279. |
*/*_The engine oil viscosity is defined by ___________ ratings.? |
| A. | Automatic transmission fluid (ATF) |
| B. | Society of automotive engineers (SAE) |
| C. | Gross vehicle weight (GVW) |
| D. | American petroleum institute (API) |
| Answer» C. Gross vehicle weight (GVW) | |
| 280. |
*/*_The octane rating of petrol commercially available is? |
| A. | 85-95 |
| B. | 95-100 |
| C. | 100-110 |
| D. | 110-125 |
| Answer» B. 95-100 | |
| 281. |
*/*_Which of the following bulb in a car will have the least wattage?? |
| A. | Head light bulb |
| B. | Stop light bulb |
| C. | Parking light bulb |
| D. | Ignition warning bulb |
| Answer» E. | |
| 282. |
*/*_The purpose of a cylinder head gasket is to? |
| A. | Prevent the combustion gases from leaking from the joint between the cylinder block and the cylinder head |
| B. | Prevent engine oil from going into combustion chamber |
| C. | Removes impurities from cylinder head lubricating oil |
| D. | None of the above |
| Answer» B. Prevent engine oil from going into combustion chamber | |
| 283. |
*/*_The combustion process in a Diesel engine is a? |
| A. | Constant volume process |
| B. | Constant pressure process |
| C. | Constant temperature process |
| D. | Adiabatic process |
| Answer» C. Constant temperature process | |
| 284. |
*/*_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 | |
| 285. |
*/*_The main function of the brake fluid is? |
| A. | Lubrication |
| B. | Power transmission |
| C. | Cooling |
| D. | None of these |
| Answer» C. Cooling | |
| 286. |
*/*_The coefficient of friction for the clutch facing is approximately? |
| A. | 0.1 |
| B. | 0.4 |
| C. | 0.8 |
| D. | 1.2 |
| Answer» C. 0.8 | |
| 287. |
*/*_In automobiles G.V.W. refers to? |
| A. | Gross vehicle width |
| B. | Gross vehicle weight |
| C. | Gross vehicle wheel base |
| D. | Gross vehicle wheel track |
| Answer» C. Gross vehicle wheel base | |
| 288. |
*/*_The path taken by intake air is? |
| A. | Carburettor (or throttle body) air cleaner intake manifold intake ports cylinders |
| B. | Air cleaner carburettor (or throttle body) intake ports intake manifold cylinders |
| C. | Air cleaner intake manifold carburettor (or throttle body) intake ports cylinders |
| D. | Air cleaner carburettor (or throttle body) intake manifold intake ports cylinders |
| Answer» E. | |
| 289. |
*/*_The natural gas is compressed in a CNG cylinder at a pressure of? |
| A. | 200 bar |
| B. | 220 bar |
| C. | 250 bar |
| D. | 300 bar |
| Answer» B. 220 bar | |
| 290. |
*/*_The main characteristics of a maintenance free (MF) battery is that? |
| A. | A maintenance free battery requires little maintenance during normal use and it is sufficient to add water instead of an electrolyte containing sulphuric acid |
| B. | A maintenance free battery has a relatively short shelf life when compared with standard batteries |
| C. | Since it is sealed, the water in maintenance free battery is not lost through evaporation thus accordingly it is not necessary to top up the cells with water |
| D. | Recharging of a maintenance free battery is neither required nor possible |
| Answer» D. Recharging of a maintenance free battery is neither required nor possible | |
| 291. |
*/*_The torque converter uses ________ to transfer torque.? |
| A. | Air |
| B. | Automatic transmission fluid (ATF) |
| C. | Gears |
| D. | Steel belt |
| Answer» C. Gears | |
| 292. |
*/*_The torque available at the contact between driving wheels and road is known as? |
| A. | Brake effort |
| B. | Tractive effort |
| C. | Clutch effort |
| D. | None of these |
| Answer» C. Clutch effort | |
| 293. |
*/*_The main cause for the change in engine oil viscosity is? |
| A. | Humidity |
| B. | Temperature |
| C. | Vibration |
| D. | Contamination |
| Answer» C. Vibration | |
| 294. |
*/*_The cetane rating of Diesel fuel is in the order of? |
| A. | 25 |
| B. | 45 |
| C. | 70 |
| D. | 90 |
| Answer» C. 70 | |
| 295. |
*/*_The air gap between the central electrode and ground (or side) electrode of a spark plug is around? |
| A. | 0.2 mm |
| B. | 0.5 mm |
| C. | 1 mm |
| D. | 1.5 mm |
| Answer» D. 1.5 mm | |
| 296. |
*/*_The component that is responsible for converting the rotation of the steering wheel into lateral motion is the? |
| A. | Steering wheel |
| B. | Steering shaft |
| C. | Steering gearbox |
| D. | Tie rod |
| Answer» D. Tie rod | |
| 297. |
*/*_When a gear box has four forward speeds and one reverse speed, it is said to be a? |
| A. | 3-speed gear box |
| B. | 4-speed gear box |
| C. | 5-speed gear box |
| D. | 6-speed gear box |
| Answer» C. 5-speed gear box | |
| 298. |
*/*_The fuel pump in the programmed fuel injection (PFI) system is located? |
| A. | Between the fuel filler pipe and fuel tank |
| B. | In the fuel tank |
| C. | On the distributor mounting in the engine compartment |
| D. | On the engine compartment bulkhead |
| Answer» C. On the distributor mounting in the engine compartment | |
| 299. |
*/*_The most effective method of controlling S.I. engine exhaust emission is by? |
| A. | Recirculating exhaust |
| B. | Using catalytic converter |
| C. | Using some additives in the fuel |
| D. | None of these |
| Answer» C. Using some additives in the fuel | |
| 300. |
*/*_In case of a Diesel car, the pressure at the end of compression is of the order of? |
| A. | 15 bar |
| B. | 25 bar |
| C. | 35 bar |
| D. | 45 bar |
| Answer» E. | |