It is necessary to maintain the valve clearances as they

Mechanical Engineering : Automobile Engineering - Quiz(MCQ)

allow for lengthening of the valves owing to the heat of combustion

make the crankshaft turn smoothly

increase the speed at which the valves move up and down

reduce the resistance to sliding that occurs between the cam and the tappet

Correct Answer : Option (A) : allow for lengthening of the valves owing to the heat of combustion

Recently Updated in Automobile Engineering Questions

Which of the following terms is used to express Ignition advance?

Crank angle

Time in milliseconds

Millimetres of piston travel before TDC

All of the above

Correct Answer : All of the above

Explanation : Ignition advance can be expressed in terms of any of the following.

Which of the following material is used to make connecting rod?

Forged steel

Tool steel

Cast iron

Mild steel

Correct Answer : Forged steel

Explanation : Connecting rod is made of forged steel.

Which of the following is defined as the escape of burned gases from the combustion chamber past the pistons and into the crankcase?

Gas loss

By pass

Blow by

Passed gas

Correct Answer : Blow by

Explanation : Blow by is the surging of burned gases from the combustion chamber into the crankcase.