we can see more ( ) on the load panel than other switches.
A. molded case automatic air circuit breakers
B. automatic air circuit breakers
C. changover switches
D. cubicle switches
查看答案
( ) are installed on the synchronizing panel.
A. Synchro-scope, synchronization indicators, power factor meter
B. Synchronization indicators, power factor meter and its changeover switch
C. Power factor meter, frequency meter and its changeover switch
D. Synchro-scope, synchronization indicators, frequency meter and its changeover switch
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.
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
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