A.is good for long term preserving since most insulation is organic and contains some amount
B.lowers the insulation value and is a common cause of fault grounds in idle machines
C.will enhance insulation resistance only if it is fresh water and contains no salt
D.reduces the amount of current supplied or drawn by the machine so horsepower is limited
您可能感興趣的試卷
你可能感興趣的試題
A.lagging
B.leading
C.maximum
D.minimum
A.running at the same speed
B.grounded
C.of the same polarity
D.in phase
A.circuit breaker
B.amplifier
C.diode
D.capacitor
A.amount of temperature rise with no load
B.temperature of the compartment where the motor is located
C.normal operating temperature, less the room temperature
D.amount of temperature developed by an operating motor
A.higher than the bus frequency
B.lower than the bus freouencv
C.the same as the bus frequency but out of phase with it
D.the same as the bus frequency, and the circuit breaker may be closed at any pointer position
最新試題
The treatment of the fuel oils involves storage, heating, filtering and（）
As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）
The ISPS Code consists of a mandatory section-Part A, which shows（）
If separating effect is not good, which measure should be taken （）
Using a file without a handle may result in （）
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
The main purpose of port State control is not to（）
Refrigerant entering the compressor of a refrigeration system should be in which of the following conditions?（）
Cold weather starting of a diesel engine may be made easier by（）
“Insufficiency of manning or insufficiency of certification of seafarers” is an identification of a（）