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Question

The engine valves are closed by

इंजन वाल्व किसके द्वारा बंद होते हैं

A.

 Cam shaft

B.

Crank shaft

C.

Valve spring

D.

 Piston

Answer ( Option C)

Valve spring

Solution

  • As the crankshaft rotates, each valve is opened by means of a tappet, pushrod and rocker arm.
  • The valve is closed by spring pressure.
  • The camshaft drive-chain sprocket has twice as many teeth as the crankshaft sprocket, so that the camshaft rotates at half engine speed.
  • Auto Engines: Valves and Valve Mechanisms

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