A、low loads necessitate frequent insulation cleaning
B、exceeding nameplate values shortens useful life
C、energy is wasted if full loading is not utilized
D、power factor correction methods are load dependent
更多“The operator of electrical motors should keep a constant check on the loads they carry because （）”相关的问题
A、has much to do with the operation of the engine and its life B、have much to do with the operation of the engine and its life C、has much doing with the operation of the engine and its life D、have much doing with the operation of the engine and its life
A、Failure of proper operation of propulsion and other essential machinery, as well as electrical installation B、Failure of the proper operation of the main and auxiliary steering gear C、Failure of engineering watch arrangements to confirm to the requirements specified for the ship by Administration D、Failure of the proper operation of emergency generator, lighting, batteries and switches
A、A.to increase the arrival／start of operations interval B、B.to increase the finishing of operations／leaving berth interval C、C.to decrease both the arrival／start of operations interval and the finishing of operations／leaving berth interval D、D.to decrease working shifts
A、which the sudden operational failure B、that the sudden operational failure C、the sudden operational failure D、the sudden operational failure of which
A、The density of the air entering the compressor B、The temperature of the air entering the compressor C、The designed rotating speed of the compressor D、A leaking head gasket
A、A.Radio communications allow the crane operator to disregard the use of hand signals B、B.The crane operators and signalman must be familiar with the correct hand signals C、C.The forward cranes can be operated from the bridge D、D.The aft cranes can be operated from the aft steering station
A、a representative of the Captain of the Port B、the operator of the vessel or facility C、a representative of the National Cargo Bureau D、a representative of the American Bureau of Shipping
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