A.ampere
B.volt
C.watt
D.ohm
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Some large A-Cmotors are equipped with heatersThese could be （）
(1)resistance heaters bolted directly to the frame
(2)low voltage windings embedded in the motor windings
A.(1) only
B.(2) only
C.either (1) or (2)
D.neither (1) or (2)
In order to change the direction of rotation of a D-Cmotor （）
(1) the field leads must be changed
(2) the input leads must be changed
A.（1）only
B.（2）only
C.either（1）or（2）
D.neither（1）or（2）
If a small electric motor is immersed in salt water it should be （）
(1) washed in fresh water
(2) dried in an oven
A.(1) only
B.(2) only
C.both (1) and (2)
D.neither (1) or (2)
A.ampere
B.kilovolt
C.watt
D.farad
A.wasted energy
B.efficient operation
C.a short in the exciter field windings
D.an excessive number of minor system grounds
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The Port State Control officer may witness a fire drill carried out by the crew assigned to these duties on the（）
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One of the reasons that cause oil flowed from sludge outlet of a self-cleaning separator is（）
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Under MARPOL Code the ship to which it applies has to carry （）
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