單項選擇題The () chamber is enclosed between the cylinder head and piston.

A.lubrication
B.injection
C.cooling
D.combustion


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2.單項選擇題The () of the diesel oil must not exceed 120 degree Fahrenheit.

A.temperature
B.pressure
C.acid value
D.viscosity

3.單項選擇題The () is not properly set thus causing either advanced or retarded firing.

A.piston
B.fuel injection pump
C.crankshaft
D.oil can

5.單項選擇題The () of the main shaft should be measured with a ().

A.clearance;calipers
B.sinking;bridge gauge
C.diameter;bridge gauge
D.clearance;lead wire