281. The information provided by the oxygen (O2) sensor to the feedback control system is about the air-fuel ratio air temperature air flow speed exhaust gas volume ✅ The correct answer is option A.
282. The main function of intake manifold is that it promotes the mixture of air and fuel reduces intake noise cools the intake air to a suitable temperature distributes intake air equally to the cylinders ✅ The correct answer is option D.
283. The aluminium alloy is used in cylinder blocks because it is lighter and have good heat dissipation characteristics material cost is low it does not require any cylinder liners the piston is also made of aluminium alloy ✅ The correct answer is option A.
284. The function of an alternator in an automobile is to supply electric power convert mechanical energy into electrical energy continually recharge the battery partly convert engine power into electric power ✅ The correct answer is option C.
285. The vehicle ride will be comfortable if unsprung mass is kept minimum sprang mass is kept minimum vehicle mass is kept minimum all of these ✅ The correct answer is option A.
286. The cetane number of a Diesel fuel is a measure of volatility viscosity ignition quality delay peirod ✅ The correct answer is option D.
287. The battery is an electrochemical device, which means battery makes chemicals by mechanical means uses chemical action to provide electricity has curved plates instead of flat plates does not use an electrolyte ✅ The correct answer is option B.
288. Positive camber is used to compensate for wheels tilting inward due to the weight of the vehicle. Yes No ✅ The correct answer is option A.
289. The diagram which shows the correct crank positions corresponding to the opening and closing of the valves, is known as indicator diagram axial force diagram valve timing diagram none of these ✅ The correct answer is option C.
290. A clutch is usually designed to transmit maximum torque which is equal to the maximum engine torque 80 per cent of the maximum engine torque 150 per cent of the maximum engine torque none of these ✅ The correct answer is option C.