Challenge your knowledge of machinery, prepare for your exams or aptitude tests with these Mechanical Engineering questions and answers.
It is necessary to maintain the valve clearances as they
reduce the resistance to sliding that occurs between the cam and the tappet
allow for lengthening of the valves owing to the heat of combustion
increase the speed at which the valves move up and down
make the crankshaft turn smoothly
Correct answer is B
No explanation has been provided for this answer.
What type of bearing is used for main bearings and connecting rod bearings ?
Ballbearings
Plain bearings
Needle roller bearing
Taper roller bearing
Correct answer is B
No explanation has been provided for this answer.
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
Correct answer is C
No explanation has been provided for this answer.
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
Correct answer is C
No explanation has been provided for this answer.
If the engine coolant leaks into the engine oil, then engine oil
appears milky
becomes foamy
turns black
none of these
Correct answer is A
No explanation has been provided for this answer.
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
Correct answer is B
No explanation has been provided for this answer.
The motion of the cam is transferred to the valves through
pistons
rocker arms
camshaft pulley
valve stems
Correct answer is B
No explanation has been provided for this answer.
The portion of a crankshaft which rests on cylinder block is called main journal.
True
False
Cannot say
No part of crankshaft rests on cylinder block
Correct answer is A
No explanation has been provided for this answer.
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
Correct answer is A
No explanation has been provided for this answer.
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