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单选题
Aboard ship, a grounded field coil in an AC motor can be determined by using a （）.
A
portable growler
B
galvanometer
C
visual inspection
D
megohmmeter
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currentC
powerD
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magnetic amplifierB
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three-wire DC generatorD
saturable core reactor
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towing bridleB
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more than 6 short blasts and 1 long blast on the whistle，and the same signal on the general alarmB
continuous sounding of the ship's whistle and the general alarm for at least 10 secondsC
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单选题The energy consumed by an AC motor, as strictly reactive power, is （）A
used to do mechanical workB
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单选题How many crew members were aboard the ship at the time of the kidnapping?A
13.B
11.C
15.D
16.
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station billB
clearance papersC
certificate of inspectionD
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单选题The most common type of AC service generator found aboard ship is the stationary （）.A
electromagnetic field, revolving armature typeB
electromagnetic field, oscillatory armature typeC
armature, oscillatory electromagnet field typeD
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考题
单选题What type of electric motor is most commonly used on board ship?（）A
non-synchronous electric motorB
synchronous electric motorC
fully enclosed electric motorD
watertight electric motor
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