The load rating of an AC generator is determined by the()
- Ainternal heat it can withstand
- Bload it can carry continuously
- Cload it is capable of supplying
- Doverload it can carry for a specified time only
The load rating of an AC generator is determined by the()
1、Ocean Bill of loading is the ()between
Ocean Bill of loading is the ()between carrier and shipper.Aevidence of the contract of carriageBocumentCtrading recordDbill
2、The cetane rating of diesel fuel is an
The cetane rating of diesel fuel is an indication of the()Aignition quality of the fuelBcalorific value of the fuelCflash point of the fuelDrate of fuel consumptio
3、The delivery rate of an axial-piston h
The delivery rate of an axial-piston hydraulic pump is controlled by varying the position of the ().Asliding blockBpintleCreaction ringDtilting box or swash plate
4、The purpose of DC generator brushes is
The purpose of DC generator brushes is to ().Aneutralize armature reactionBconduct electric current to an outside circuitCconvert DC current to AC currentDprovide excitation to a DC generator
5、The voltage output of an AC generator
The voltage output of an AC generator is controlled by()Avarying the DC exciter voltageBvarying the reluctance of the air gapCregulating the speed of the prime moverDshorting out part of the armature winding
6、The frequency of an AC generator is ad
The frequency of an AC generator is adjusted by means of the ()Amain alternator field rheostatBexciter field rheostatCprime mover governor controlDequalizing reactor