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單項(xiàng)選擇題

Duty officer informs us that the vessel is out of harbor and in “Full Ahead”We are going to run （）.

A.diesel oil instead of fuel oil
B.fuel oil instead of diesel oil
C.diesel oil instead fuel oil
D.fuel oil instead diesel oil

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單項(xiàng)選擇題

The bearing cap and shell are replaced and tightened up until （）.

A.the “ nip ”is zero
B.the “ nap ” is zero
C.the “ gap ”is correct
D.the “ clearance ” is correct

單項(xiàng)選擇題

In （）the control action is independent on the output.

A.a closed loop control system
B.an open loop control system
C.a boiler control system
D.a steering gear

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