题目内容

For the load panels of the main switchboard, ( ) is not true.

A. Load panel is used to monitor, control and protect generator sets.
B. Load panels include power load panels and lighting load panels.
C. Load panel has megaohm meter and insulation indicator on it.
D. Load panel has a shore power switch on it, which is used to control the connection with the shore power.

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The control law of a steering gear is β= - K1φ , where β is steering angle, φ is yaw angle, then it is ( ).

A. P type steering gear
B. PI type steering gear
C. PD type steering gear
D. PID type steering gear

We divide the steering gear into P type, PI type, PD type and PID type according to the control law. Generally speaking the best control law is ( ).

A. P type
B. PI type
C. PD type
D. PID type

When there is course deviation, if the steering gear is at servo mode, we should give a reverse angle ( ) the ship tracks back to the course; and the reverse angle is given ( ).

A. after/automatically
B. during/automatically
C. during/manually
D. after/manually

For a synchronous generator, if the power factor increases from 0.6 (lagging) to 0.8 (lagging), the exciting current should ( ) if we want to keep the terminal voltage constant.

A. increase
B. decrease
C. remain the same
D. depends on the AVR

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