The bottom ring prevents excessive oil from entering the combustion chamber from the______ .
A. oil pan
B. crankcase
C. fuel tank
D. water pump
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The flywheel is bolted to the _____on the rear end of the crankshaft.
A. tail
B. central
C. flange
D. top
In the standard engine, each cylinder has ______.
A. four valves
B. two valves
C. one valve
D. three valves
Spark plug provides the spark which ignites the _______.
A. fuel
B. oil
C. air-fuel mixture
D. combustion gases
The ______ of piston movement is called TDC (top dead center).
A. upper limit
B. lower limit
C. limit
D. limits
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