Q.1
In a four stroke engine each cylinder has
  • a) One valve
  • b) Two valves
  • c) Three valves
  • d) Four valves
Q.2
In a diesel engine the fuel injection pressure is in the range
  • a) 100 to 170 atm
  • b) 60 to 70 atm
  • c) 30 to 40 atm
  • d) 20 to 25 atm
Q.3
The valve is opened as the cam lobe on the cam raises the
  • c) Valve lifter
  • d) Valve seat
  • a) Bearing
  • b) Piston
Q.4
Exhaust valve temperature is about
  • a) 35 degree celsius
  • b) 100 degree celsius
  • c) 150 degree celsius
  • d) 500 degree celsius
Q.5
The size of the engine intake valve is
  • a) Same as that of exhaust valve
  • b) Smaller than that of exhaust valve
  • c) Larger than that of exhaust valve
  • d) Does not depend upon the size of exhaust valve
Q.6
The device used to measure the clearance between the valve and tappet of an IC Engine is
  • a) Feeler gauge
  • b) Snap gauge
  • c) Slip gauge
  • d) Micrometer
Q.7
The purpose of valve clearance is to
  • a) Allow the valve to expand
  • b) Allow the sliding of valve in the guide
  • c) Ensure that the valve closes fully
  • d) Ensure that the crankshaft is free to rotate
Q.8
The opening and closing of a valve is respectively done by
  • a) A cam and a spring
  • b) A spring and a cam
  • c) Gas pressure and cam
  • d) Cylinder vacuum and spring
Q.9
On modern four stroke engines the exhaust valve opens just
  • a) Before TDC
  • b) After TDC
  • c) Before BDC
  • d) After BDC
Q.10
On modern four stroke engines the inlet valve opens just
  • a) Before TDC
  • b) After TDC
  • c) Before BDC
  • d) After BDC
Q.11
A relief valve is fitted to the main oil gallery of an engine. The purpose of this valve is to
  • a) Limit the maximum oil pressure
  • b) Open when the oil is hot
  • c) Maintain the supply if the gallery becomes blocked
  • d) Stop the oil flow to the bearings
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