AUTOMOBILE ENGINEERING

The condition that causes vapour locking in a brake system is

• overheating of the fluid due to frequent brake application

• overcooling of the brakes during high speed driving

• keeping the vehicle without use for an extended period

• an excessively high engine speed on a downhill road

The motion of the cam is transferred to the valves through

• pistons

• rocker arms

• camshaft pulley

• valve stems

Which of the following symptom is caused as a result of brake disc run out ?

• Ineffectiveness of the brakes

• Judder during braking

• Localized wearing of the brake pads

• Rapid wearing of the brake pads

If the engine coolant leaks into the engine oil, then engine oil

• appears milky

• becomes foamy

• turns black

• none of these

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 powe

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

What type of bearing is used for main bearings and connecting rod bearings ?

• Ballbearings

• Plain bearings

• Needle roller bearing

• Taper roller bearing

The torque available at the contact between driving wheels and road is known as

• brake effort

• tractive effort

• clutch effort

• none of these

A traction control system (TCS) in automobiles controls the

• vibrations on the steering wheel

• engine power during acceleration

• Torque that is transmitted by the tyres to the road surface

• stopping distance in case of emergency

The oil pump is driven by the

• camshaft

• alternator shaft

• crankshaft via drive belt

• crankshaft directly