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单选题 The frequency of the alternating current generated by a synchronous generator is governed by the speed and the______
学科：船舶电子电气专业英语2
时间：2026-01-05 22:23:05
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题目1单选题
The frequency of the induced voltages is ______ the rotational speed and the number of poles in the synchronous machineA. proportional toB. changed toC. equal toD. proper to
题目2单选题
The coil of wire rotating in the magnetic field produces the ______A. currentB. powerC. voltageD. frequency
题目3单选题
Nowadays 2 to 3 generators are used on ships, to facilitate load sharing and to prevent wear down due to ________A. load sharingB. overloadC. fire fightingD. generate water
题目4单选题
The voltage drop effect of AVR ensures ______ of reactive power in parallel-connected generatorsA. equal distributionB. random distributionC. unequal distributionD. uneven distribution
题目5单选题
The excitation of the generator is controlled by______A. a transformerB. a governorC. the reactive powerD. an automatic voltage regulator
题目6单选题
A/An ______ generator will give 60Hz at 1800 r/minA. four-poleB. six-poleC. eight-poleD. two-pole
题目7单选题
Rotor and stator of the alternator were cleaned by special cleaner, dried and painted with one coat of ______ paintA. insulatedB. waterproofC. dustproofD. insulating
题目8单选题
______ is a machine by which mechanical energy is transformed into electrical energyA. An electric motorB. A diesel engineC. A main switchboardD. An alternator
题目9单选题
The generators should be up to the principle requirements and ________A. ran with some sparks or noisesB. run without sparks or noisesC. runs with sparks or noisesD. runs without sparks or noises
题目10单选题
The frequency of the alternating current generated by a synchronous generator is governed by the speed and the______A. loadB. number of polesC. power factorD. full excitation
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