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.
| 151. |
The main function of a master cylinder is to |
| A. | djust the extent of brake pedal free play |
| B. | oost the force applied to brake pedal |
| C. | onvert brake pedal force into hydraulic pressure |
| D. | nsure that all the wheel brakes are supplied with the same amount of fluid pressure |
| Answer» D. nsure that all the wheel brakes are supplied with the same amount of fluid pressure | |
| 152. |
The calorific value of Diesel is about |
| A. | 6.5 MJ/kg |
| B. | 8.5 MJ/kg |
| C. | 2.5 MJ/kg |
| D. | 5.5 MJ/kg |
| Answer» E. | |
| 153. |
If clearance volume of I.C. engines is increased, the compression ratio will |
| A. | ncrease |
| B. | ecrease |
| C. | emain constant |
| D. | e doubled |
| Answer» C. emain constant | |
| 154. |
The capacity of a battery is usually expressed in terms of |
| A. | olts |
| B. | mperes |
| C. | eight |
| D. | mpere hours |
| Answer» E. | |
| 155. |
The rating of C.I. engine fuel (Diesel) is given by |
| A. | ctane number |
| B. | erformance number |
| C. | etane number |
| D. | one of these |
| Answer» D. one of these | |
| 156. |
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. | .L.A.N/2 |
| B. | .L.A.N |
| C. | × P.L.A.N |
| D. | .L.A.N/4 |
| Answer» B. .L.A.N | |
| 157. |
The commonly used antifreeze solution in automobiles is |
| A. | arbon disulphide |
| B. | thylene glycol |
| C. | mmonium chloride |
| D. | reon-12 |
| Answer» C. mmonium chloride | |
| 158. |
The most commonly used power plant in automobiles is |
| A. | as turbine |
| B. | .C. engine |
| C. | attery |
| D. | one of these |
| Answer» C. attery | |
| 159. |
The number of exhaust manifolds in a V6 engine is |
| A. | ne |
| B. | wo |
| C. | our |
| D. | ight |
| Answer» C. our | |
| 160. |
The ball joints are used on the tie rod ends, because they |
| A. | educe the amount of noise generated |
| B. | educe the amount of sliding resistance |
| C. | an deal with movement of the suspension both vertically and in other directions |
| D. | mprove the force transmission speed |
| Answer» D. mprove the force transmission speed | |
| 161. |
The crescent shaped cavity on the piston head top surface is called as |
| A. | iston oil hole |
| B. | nap ring |
| C. | alve recess |
| D. | alve clearance |
| Answer» D. alve clearance | |
| 162. |
The specific gravity of petrol is about |
| A. | 0.75 |
| B. | 0.85 |
| C. | 0.95 |
| D. | 0.25 |
| Answer» B. 0.85 | |
| 163. |
The calorific value of petrol is about |
| A. | 6.5-38.5 MJ/kg |
| B. | 9.4-42.5 MJ/kg |
| C. | 2.7-43.5 MJ/kg |
| D. | 5.5-47 MJ/kg |
| Answer» D. 5.5-47 MJ/kg | |
| 164. |
A four cylinder engine has a capacity of 2.4 litres. The swept volume of one cylinder is |
| A. | 00 cm³ |
| B. | 00 cm³ |
| C. | 200 cm³ |
| D. | 400 cm³ |
| Answer» C. 200 cm³ | |
| 165. |
The clutch is located between the transmission and the |
| A. | ngine |
| B. | ear axle |
| C. | ropeller shaft |
| D. | ifferential |
| Answer» B. ear axle | |
| 166. |
A basic difference between the spark ignition engine and the Diesel engine is that the |
| A. | iesel engine compresses air alone instead of an air-fuel mixture |
| B. | ir temperature ignites the fuel in the Diesel engine |
| C. | uel is sprayed into the combustion chamber in the Diesel engine as the piston nears T.D.C. on the compression stroke |
| D. | ll of the above |
| Answer» E. | |
| 167. |
The condition that results in large quantities of CO emission is |
| A. | nsufficient air during combustion |
| B. | nsufficient fuel during combustion |
| C. | ow temperature combustion |
| D. | igh temperature combustion |
| Answer» B. nsufficient fuel during combustion | |
| 168. |
The advantage of having a tandem master cylinder arrangement in automobiles is that it |
| A. | nhances safety by serving two independent lines in a divided line brake circuit |
| B. | nhances safety by activating the brakes using vacuum pressure in the event of brake fluid loss |
| C. | upplies equal fluid pressure to each line of a divided line brake circuit, thereby preventing the brakes from dragging on one side |
| D. | oosts the brake fluid pressure to reduce the force required to depress the brake pedal |
| Answer» B. nhances safety by activating the brakes using vacuum pressure in the event of brake fluid loss | |
| 169. |
The painting of automobiles is done to |
| A. | revent rust from growing on the body |
| B. | mprove its external appearance |
| C. | etain the characteristics of steel for long |
| D. | ll of these |
| Answer» E. | |
| 170. |
The main function of a resonator is that it |
| A. | egulates the intake air flow rate |
| B. | educes the intake air noise |
| C. | nhances intake efficiency |
| D. | egulates the intake air temperature |
| Answer» C. nhances intake efficiency | |
| 171. |
The fuel that detonates easily, is |
| A. | -heptane |
| B. | so-octane |
| C. | enzene |
| D. | lcohol |
| Answer» B. so-octane | |
| 172. |
When the piston is at T.D.C., the volume above the piston in the combustion chamber is the |
| A. | learance volume |
| B. | ylinder volume |
| C. | xhaust volume |
| D. | one of these |
| Answer» B. ylinder volume | |
| 173. |
The three basic cylinder arrangements for automotive engines are |
| A. | lat, radial, and V |
| B. | n a row, in line, and opposed |
| C. | n line, V, and opposed |
| D. | , double row, and opposed |
| Answer» D. , double row, and opposed | |
| 174. |
Which of the following is not an automobile? |
| A. | otor cycle |
| B. | assenger car |
| C. | eroplane |
| D. | ruck |
| Answer» D. ruck | |
| 175. |
The lower cylindrical portion of the piston which improves piston cooling performance is called |
| A. | iston crown |
| B. | onnecting rod |
| C. | iston pin boss |
| D. | iston skirt |
| Answer» E. | |
| 176. |
The brake pedal during ABS operation |
| A. | s pushed upward forcefully |
| B. | edal stroke becomes longer |
| C. | ransmits slight kickback to the driver's foot |
| D. | ll of the above |
| Answer» D. ll of the above | |
| 177. |
In aluminium cylinder blocks, the cylinder liners are made of |
| A. | luminium |
| B. | eramic |
| C. | rass |
| D. | ast iron |
| Answer» E. | |
| 178. |
The gradient resistance to a vehicle having a mass of 980 kg moving on an incline of 10° is |
| A. | .6694 N |
| B. | 6.694 N |
| C. | 66.94 N |
| D. | 669.4 N |
| Answer» E. | |
| 179. |
The included angle is the sum of the |
| A. | amber and castor |
| B. | astor and S.A.I. |
| C. | amber and S.A.I. |
| D. | amber and toe in |
| Answer» D. amber and toe in | |
| 180. |
The cam shaft in an engine is always mounted |
| A. | arallel to the crankshaft |
| B. | erpendicular to the crankshaft |
| C. | nclined to the crankshaft |
| D. | one of these |
| Answer» B. erpendicular to the crankshaft | |
| 181. |
During braking, the brake shoe is moved outward to force the lining against the |
| A. | heel piston or cylinder |
| B. | nchor pin |
| C. | rake drum |
| D. | heel rim or axle |
| Answer» D. heel rim or axle | |
| 182. |
What type of bearing is used for main bearings and connecting rod bearings? |
| A. | all bearings |
| B. | lain bearings |
| C. | eedle roller bearing |
| D. | aper roller bearing |
| Answer» C. eedle roller bearing | |
| 183. |
The material generally used for cylinder sleeves is |
| A. | luminium |
| B. | eramic |
| C. | ast iron |
| D. | ibre reinforced plastic |
| Answer» D. ibre reinforced plastic | |
| 184. |
The characteristic that is enhanced by the use of cylinder sleeves is |
| A. | ooling efficiency |
| B. | esistance to wear |
| C. | ubrication performance |
| D. | one of these |
| Answer» C. ubrication performance | |
| 185. |
The component of the oil filter that prevents the passage of metal particles and sludge is |
| A. | lement |
| B. | elief valve |
| C. | heck valve |
| D. | ase |
| Answer» B. elief valve | |
| 186. |
The exhaust gas from petrol engine contains |
| A. | etrol vapours |
| B. | ater vapours |
| C. | arbon monoxide |
| D. | ll of these |
| Answer» E. | |
| 187. |
In Spark Ignition Engine |
| A. | nly air is introduced into the cylinder |
| B. | he mixture of air and fuel is introduced into the cylinder from carburettor |
| C. | oth (A) and (B) |
| D. | one of these |
| Answer» C. oth (A) and (B) | |
| 188. |
The best fuels for compression ignition engines are |
| A. | traight chain paraffin |
| B. | romatics |
| C. | ranched chain paraffin |
| D. | aphthalene |
| Answer» E. | |
| 189. |
Two advantages of using helical gears rather than spur gears in a transmission system are |
| A. | trength and cost |
| B. | trength and less end thrust |
| C. | oise level and strength |
| D. | oise level and economy |
| Answer» D. oise level and economy | |
| 190. |
The sequence in which the force is transmitted through a brake system when the brake pedal is depressed is |
| A. | rake pedal, master cylinder, brake lines, vacuum servo mechanism, brake pads |
| B. | rake pedal, vacuum servo mechanism, master cylinder, brake lines, brake pads |
| C. | rake pedal, master cylinder, vacuum servo mechanism, brake lines, brake pads |
| D. | rake pedal, brake lines, vacuum servo mechanism, master cylinder, brake pads |
| Answer» C. rake pedal, master cylinder, vacuum servo mechanism, brake lines, brake pads | |
| 191. |
The Diesel engines as compared to petrol engines require |
| A. | igger flywheel |
| B. | maller flywheel |
| C. | ame size of flywheel |
| D. | o flywheel |
| Answer» B. maller flywheel | |
| 192. |
The Diesel engine works on |
| A. | tto cycle |
| B. | arnot cycle |
| C. | iesel cycle |
| D. | ankine cycle |
| Answer» D. ankine cycle | |
| 193. |
The antiknock property of compression ignition engine fuel can be improved by adding |
| A. | etraethyl lead |
| B. | rimethyl pentane |
| C. | myl nitrate |
| D. | exadecane |
| Answer» D. exadecane | |
| 194. |
In a hydraulic power steering system, the power steering pump is driven by a |
| A. | elt driven by camshaft |
| B. | hain driven by crankshaft |
| C. | elt driven by drive-shaft |
| D. | elt driven by crankshaft |
| Answer» E. | |
| 195. |
Damper in an automobile is used to |
| A. | bsorb the energy |
| B. | issipate the energy |
| C. | elease the energy |
| D. | ncrease the energy |
| Answer» C. elease the energy | |
| 196. |
The acid used in automobile battery is |
| A. | ydrochloric acid |
| B. | ydrofluoric acid |
| C. | itric acid |
| D. | ulphuric acid |
| Answer» E. | |
| 197. |
Engine misfiring is likely to result from |
| A. | park plug gap too small |
| B. | park plug gap too wide |
| C. | apours lock in the fuel only |
| D. | ncorrect fuel air mixture |
| Answer» C. apours lock in the fuel only | |
| 198. |
In an engine, the temperature of the piston will be more at the |
| A. | rown of the piston |
| B. | kirt of the piston |
| C. | iston walls |
| D. | iston rings |
| Answer» B. kirt of the piston | |
| 199. |
In petrol engines, during suction stroke, _________ is drawn in the cylinder |
| A. | ir and fuel |
| B. | nly fuel |
| C. | nly air |
| D. | one of these |
| Answer» B. nly fuel | |
| 200. |
The ignition coil is used to |
| A. | tep up current |
| B. | tep down current |
| C. | tep up voltage |
| D. | tep down voltage |
| Answer» D. tep down voltage | |