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.
| 201. |
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. | upercharging |
| B. | uto ignition |
| C. | cavenging |
| D. | etonation |
| Answer» B. uto ignition | |
| 202. |
Thinner is added to the paint in order to |
| A. | ake pigments and resin mix easily |
| B. | ake paint film hard |
| C. | ptimise its viscosity |
| D. | one of these |
| Answer» D. one of these | |
| 203. |
The negative terminal post on the top of a battery is |
| A. | maller than the positive terminal post |
| B. | arger than the positive terminal post |
| C. | f the same size as the positive terminal post |
| D. | one of these |
| Answer» B. arger than the positive terminal post | |
| 204. |
The auto ignition in a spark ignition engine means |
| A. | utomatic ignition of the charge at the end of compression |
| B. | gnition induced by the passage of a spark |
| C. | gnition of the charge before the passage of flame front |
| D. | gnition induced to supplement the process of normal combustion |
| Answer» D. gnition induced to supplement the process of normal combustion | |
| 205. |
Valve overlap is the number of degrees of camshaft rotation during which |
| A. | oth valves are closed |
| B. | oth valves are open |
| C. | oth 'A' and 'B' |
| D. | one of these |
| Answer» C. oth 'A' and 'B' | |
| 206. |
When the top of the wheel is tilted outward, then it is called |
| A. | ositive camber |
| B. | egative camber |
| C. | ositive caster |
| D. | egative caster |
| Answer» B. egative camber | |
| 207. |
The connecting rod is attached to the piston by the |
| A. | ap bolt |
| B. | iston pin |
| C. | ap roller bearing |
| D. | od cap |
| Answer» C. ap roller bearing | |
| 208. |
An oil filter bypass valve opens when the |
| A. | ngine is cold |
| B. | ngine overheats |
| C. | il filter becomes clogged |
| D. | ngine runs at high speed |
| Answer» D. ngine runs at high speed | |
| 209. |
The main feature of Macpherson strut suspension is that |
| A. | he vertical size of the suspension can be made more compact |
| B. | on vertical external forces are supported by the suspension arms |
| C. | he unsprung mass in lighter |
| D. | he assembly is slightly more complicated in design |
| Answer» C. he unsprung mass in lighter | |
| 210. |
The advantage of the fuel injection system over the carburettor system is |
| A. | mproved fuel efficiency |
| B. | mproved emission |
| C. | mproved power output |
| D. | ll of these |
| Answer» E. | |
| 211. |
The octane number of compressed natural gas (CNG) is |
| A. | 0 |
| B. | 00 |
| C. | 10 |
| D. | 20 |
| Answer» E. | |
| 212. |
In which of the following conditions, the idle CO percentage should be measured with the vehicle? |
| A. | eadlights and other electrical devices are switched off |
| B. | eadlights and other electrical devices are switched on |
| C. | eadlights and other lights are switched off |
| D. | eadlights are switched on |
| Answer» B. eadlights and other electrical devices are switched on | |
| 213. |
Bead wires are made of |
| A. | teel |
| B. | opper |
| C. | inc |
| D. | luminium |
| Answer» B. opper | |
| 214. |
Vulcanizing means |
| A. | eating rubber under pressure |
| B. | praying with special paint |
| C. | elting rubber while stirring it |
| D. | one of these |
| Answer» B. praying with special paint | |
| 215. |
The temperature at which tyre inflation pressure should be checked is |
| A. | 0°C |
| B. | 5°C |
| C. | 5°C |
| D. | mbient temperature |
| Answer» E. | |
| 216. |
With the increase of battery temperature, the specific gravity of electrolyte |
| A. | ncreases |
| B. | ecreases |
| C. | emains the same |
| D. | one of these |
| Answer» C. emains the same | |
| 217. |
The advantage of a tubeless tyre over tube type tyre is |
| A. | low air leakage |
| B. | etter fuel efficiency |
| C. | ess chances of running flat |
| D. | ll of these |
| Answer» E. | |
| 218. |
The component that is responsible for converting the rotation of the steering wheel into lateral motion is the |
| A. | teering wheel |
| B. | teering shaft |
| C. | teering gearbox |
| D. | ie rod |
| Answer» D. ie rod | |
| 219. |
The function of a proportioning control valve (PCV) in a brake system is to |
| A. | nsure that equal pressure is supplied to the front and rear brakes throughout every braking operation |
| B. | educe the brake fluid pressure when the brakes approach their lockup point |
| C. | ause less brake fluid pressure to act on the front brakes than on the rear brakes when the fluid pressure exceeds a predetermined level |
| D. | ause 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. | |
| 220. |
In a square type engine |
| A. | eometrical shape is square |
| B. | iameter and length of piston are same |
| C. | wo cylinders are placed horizontal and two vertical |
| D. | troke length and cylinder bore are same |
| Answer» E. | |
| 221. |
An engine has a clearance volume of 100 cm³ and a swept volume of 800 cm³. The compression ratio is |
| A. | : 1 |
| B. | : 1 |
| C. | : 1 |
| D. | 0 : 1 |
| Answer» D. 0 : 1 | |
| 222. |
Two general types of tyres are |
| A. | ube type and tubeless |
| B. | olid and tubeless |
| C. | ir and pneumatic |
| D. | plit rim and drop centre |
| Answer» B. olid and tubeless | |
| 223. |
Which one of the following statements correctly describes the construction of a planetary gear type differential? |
| A. | he six planetary pinions rotate in constant mesh with the internal gears. |
| B. | ne drive shaft is splined to the central gear and the other to the planetary gear. |
| C. | ach planetary pinion gear meshes with both the central gear and the internal gear. |
| D. | he internal gear is fixed to the planetary gear. |
| Answer» C. ach planetary pinion gear meshes with both the central gear and the internal gear. | |
| 224. |
Which one of the following statement correctly describes the construction of a bevel gear type differential? |
| A. | he drive shafts are splined to the differential carrier. |
| B. | he left side gear and the differential carrier rotate in constant unison. |
| C. | he differential carrier houses differential pinion gears and side gears; each pinion gear meshes with a different side gear. |
| D. | he differential carrier houses differential pinion gears and side gears. |
| Answer» E. | |
| 225. |
The main merit of a multi cylinder type cylinder sleeve is |
| A. | maller engine dimensions |
| B. | etter cooling efficiency |
| C. | igh rigidity |
| D. | one of these |
| Answer» B. etter cooling efficiency | |
| 226. |
The piston compression rings are made of |
| A. | ast iron |
| B. | teel |
| C. | luminium |
| D. | ronze |
| Answer» B. teel | |
| 227. |
The function of an oil control orifice is that it |
| A. | eturns cylinder head lubricating oil to the oil pan at high speed |
| B. | urns oil into fine mist for spray lubrication |
| C. | egulates the pressure of engine oil supplied by the oil pump for the lubrication of cylinder head mechanism and other purposes |
| D. | emoves impurities from cylinder head lubricating oil |
| Answer» D. emoves impurities from cylinder head lubricating oil | |
| 228. |
In case of a Diesel car, the pressure at the end of compression is of the order of |
| A. | 5 bar |
| B. | 5 bar |
| C. | 5 bar |
| D. | 5 bar |
| Answer» E. | |
| 229. |
The caster is called positive when the top of the king pin is inclined to the |
| A. | ear of the vehicle |
| B. | ront of the vehicle |
| C. | eft of the vehicle |
| D. | ight of the vehicle |
| Answer» B. ront of the vehicle | |
| 230. |
The boiling point of Diesel fuel is in the range of |
| A. | 0°C to 100°C |
| B. | 00°C to 120°C |
| C. | 20°C to 180°C |
| D. | 80°C to 360 °C |
| Answer» E. | |
| 231. |
The lubrication oil flow in an engine is in the order as |
| A. | il strainer, oil pump, relief valve, oil filter, cylinder block, cylinder head and oil pan |
| B. | il pump, oil strainer, relief valve, oil filter, cylinder block, cylinder head and oil pan |
| C. | il strainer, oil filter, relief valve, oil pump, cylinder block, cylinder head and oil pan |
| D. | il strainer, oil pump, relief valve, oil filter, cylinder head, cylinder block and oil pan |
| Answer» B. il pump, oil strainer, relief valve, oil filter, cylinder block, cylinder head and oil pan | |
| 232. |
The rigid suspension is beneficial when |
| A. | t is desired to reduce the unsprung mass |
| B. | t is desired to have more flexibility in design |
| C. | t is desired to improve tyre to ground contact characteristics |
| D. | arge changes in load make it necessary to have a large suspension stroke |
| Answer» E. | |
| 233. |
The fuel pump in the programmed fuel injection (PFI) system is located |
| A. | etween the fuel filler pipe and fuel tank |
| B. | n the fuel tank |
| C. | n the distributor mounting in the engine compartment |
| D. | n the engine compartment bulkhead |
| Answer» C. n the distributor mounting in the engine compartment | |
| 234. |
In a forced feed lubrication system, the device used to guard against excessive oil pressure, is known as |
| A. | elease chamber |
| B. | alancer |
| C. | elief valve |
| D. | top valve |
| Answer» D. top valve | |
| 235. |
The information provided by the oxygen (O₂) sensor to the feedback control system is about the |
| A. | ir-fuel ratio |
| B. | ir temperature |
| C. | ir flow speed |
| D. | xhaust gas volume |
| Answer» B. ir temperature | |
| 236. |
The most effective method of controlling S.I. engine exhaust emission is by |
| A. | ecirculating exhaust |
| B. | sing catalytic converter |
| C. | sing some additives in the fuel |
| D. | one of these |
| Answer» C. sing some additives in the fuel | |
| 237. |
The engine oil level should be checked |
| A. | mmediately after the ignition switch is turned off |
| B. | hile the engine is running |
| C. | few minutes after the ignition switch is turned off |
| D. | hile the engine is running at high idle speed |
| Answer» D. hile the engine is running at high idle speed | |
| 238. |
When a gear box has four forward speeds and one reverse speed, it is said to be a |
| A. | -speed gear box |
| B. | -speed gear box |
| C. | -speed gear box |
| D. | -speed gear box |
| Answer» C. -speed gear box | |
| 239. |
Which part of the automobile tyre is subjected to greatest flexing action? |
| A. | ead |
| B. | ide wall |
| C. | houlder |
| D. | read |
| Answer» C. houlder | |
| 240. |
The specific gravity of acid in a fully charged battery is generally |
| A. | 0 |
| B. | 0.28 |
| C. | 0.82 |
| D. | 0.81 |
| Answer» C. 0.82 | |
| 241. |
The reconditioning process used to give cylinder bore surfaces a crosshatch pattern, is known as |
| A. | oning |
| B. | orous plating |
| C. | oring |
| D. | hot peening |
| Answer» B. orous plating | |
| 242. |
Cushioning springs in clutch plate reduces |
| A. | ehicle speed |
| B. | orsional vibrations |
| C. | erky starts |
| D. | one of these |
| Answer» D. one of these | |
| 243. |
The ease with which petrol vaporizes is called its |
| A. | xidation |
| B. | ctane number |
| C. | olatility |
| D. | etane number |
| Answer» D. etane number | |
| 244. |
The ease with which petrol vaporizes is called its~! |
| A. | Oxidation |
| B. | Octane number |
| C. | Volatility |
| D. | Cetane number |
| Answer» D. Cetane number | |
| 245. |
The operation of removing trapped air from the hydraulic braking system is known as~! |
| A. | Trapping |
| B. | Tapping |
| C. | Bleeding |
| D. | Cleaning |
| Answer» D. Cleaning | |
| 246. |
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 | |
| 247. |
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 | |
| 248. |
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 | |
| 249. |
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. | |
| 250. |
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 | |