The operator of electrical motors should keep a constant check on the loads they carry because （）
1、Which of the motors for the devices li
Which of the motors for the devices listed below is fitted with an instantaneous overload relay?（）AFanBPumpCWinchDMachine tool
2、The resistance of electric wire will d
The resistance of electric wire will decrease as its （）Alength increasesBcross-sectional area increasesCtemperature increasesDpercent of metallic purities increase
3、If the electric motor driving an air c
If the electric motor driving an air compressor fails to start, the cause may be a （）.Aleaking unloaderBtripped circuit breakerCcontrol line leakDdefective pop valve
4、The unit of electrical power is the __
The unit of electrical power is the _____.AampereBkilovoltCwattDfarad
5、Which of the following electric motors
Which of the following electric motors would be the safest and most reliable to use on the main deck of a vessel in foul weather conditions?（）ASealed motorsBDrip proof motorsCEnclosed motorsDWatertight motor
6、Which of the following attributes shou
Which of the following attributes should be specified when creating a volume group?（）Astripe sizeBallocation policyCphysical partition sizeDnumber of logical partitio