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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
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13.B
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15.D
16.
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station billB
clearance papersC
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单选题The most common type of AC service generator found aboard ship is the stationary （）.A
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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
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