更多"（）的英语是voltage。"的相关试题:
[名词解释]额定电压（rated voltage）
[名词解释]标称电压（nominal voltage）
[名词解释]接触电压（touch voltage）
[名词解释]故障电压（fault voltage）
[单项选择]Possible phase relationships between voltage and current in an alternating current circuit include which of the following conditions?（）
A. Current and voltage may be in phase
B. Current may lead the voltage
C. Current may lag the voltage
D. All of the above
[单项选择]When the voltage remains constant and the resistance is increased in a series circuit, the flow of current （）
A. increases by the square of the original value
B. increases
C. remains the same
D. decreases
[单项选择]Generators should have an excitation/voltage regulation system which will enable them to share the steady state reactive load （） no machine exceeds its proportional share of reactive load by more than 10% of the rated reactive load of the largest generator.
A. when
B. so as
C. such that
D. though
[单项选择]The most inefficient method of voltage reduction from the stand point of power loss, is a/an （）
A. capacitor in series with the load
B. inductor in series with the load
C. capacitor and inductor in series with the load
D. resistor in series with the load
[名词解释]接触电压限值（touch voltage limit）
[名词解释]预期接触电压（prospective touch voltage）
[单项选择]If a technician suspects that the voltage being delivered to a desktop computer’s power supply is insufficient or incorrect, which device should be used to determine the correct voltage?（）
A. A power supply tester
B. A multimeter
C. A loopback adapter
D. A cable tester
[单项选择]With a purely resistance load the voltage and current are in phase, giving a power factor of （）.
A. one
B. less than one
C. more than one
D. negative one
[单项选择]A constant output voltage from an AC generator is maintained by the （）.
A. prime mover governor
B. exciter generator
C. voltage regulator
D. reverse power relay
[单项选择]Voltage generated by most AC generators is fed from the machine to the bus by means of（）.
A. brushes on a commutator
B. brushes on slip rings
C. slip rings on a commutator
D. direct connections from the stator
[单项选择]The voltage developed by an AC generator is controlled by varying the （）
A. speed of the prime mover
B. AC excitation to the field
C. DC excitation to the field
D. DC excitation of the voltage regulator
[单项选择]The initial voltage of self-excitation generator set up by（）
A. residual magnetism
B. voltage regulator
C. electrical current for excitation
D. the other running generator
[单项选择]When voltage and current developed in an AC circuit reach their peak values at the same time, the power factor is （）
A. lagging
B. leading
C. maximum
D. minimum
[单项选择]When current and voltage reach maximum values at the same time, the power factor is（）
A. minimum
B. maximum
C. leading
D. lagging
[单项选择]The voltage output of an AC generator is controlled by（）
A. varying the DC exciter voltage
B. varying the reluctance of the air gap
C. regulating the speed of the prime mover
D. shorting out part of the armature windings
