Which of the listed substances can be satisfactorily removed from diesel fuel by centrifuging?（）
A、Sludge
B、Gasoline
C、Fuel oil
D、Lube oil
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Inductance is the property of an electric circuit that （）
A、opposes any change in the applied voltage
B、opposes any change in the current flow through the circuit
C、aids any changes in the applied voltage
D、aids any changes in the current through the circuit
If the coolant temperature of a closed cooling water system for a diesel engine gradually increases, the trouble usually is （）
A、a broken shaft on the freshwater pump
B、an excessive accumulation of scale exchanger
C、an incorrect thermostatic element operating range
D、lube oil in the cooling water
STCW shall apply to seafarers（） on board seagoing ships entitled to fly the flag of a Party.
A、served
B、serving
C、surveyed
D、surveying
If you notice smoke coming fro the crankcase exhaust fan outlet of an operating diesel engine, you would suspect（）
A、a cracked cylinder liner
B、clogged intake ports
C、broken piston rings
D、a faulty head gasket
A moving object will not accelerate or decelerate （）a force is applied to it.
A、whether
B、if
C、unless
D、till
