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单选题
The total power consumed in a parallel circuit is （）
A
the sum of the powers used in each load (resistor)
B
divided by the number of loads
C
always less than the power used in the smallest load
D
the sum of the powers used in each individual load never more than the power used in the largest load
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Which of the following can occur if the maximum rated load is exceeded on an uninterruptible power supply (UPS)?()
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什么是RSRP?()
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The total resistance of a parallel circuit is always______.A.larger than the greatest branch resistanceB.smaller than the lowest branch resistanceC.equal to the sum of the individual branch resistancesD.one-half the sum of the individual branch resistances
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voltage regulatorsB
field rheostatsC
reverse power relaysD
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考题
单选题什么是RSRP？（）A
The received power on the resource elements that carry cell-specific reference signalsB
wideband powerC
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Signal to Interference plus Noise Ratio
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单选题When voltage and current developed in an AC circuit reach their peak values at the same time, the power factor is （）A
laggingB
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maximumD
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单选题When measuring AC current flow, you must always connect the meter （）A
in series with the power source and loadB
in parallel with the power source and loadC
insuring correct polarityD
using the lowest range possible to prevent instrument damage
考题
单选题Who was the most famous of all American inventors and invented electric lamp, phonograph, motion pictures and parallel circuit?A
John StevensB
Alexander Graham BellC
Thomas Alva EdisonD
John H. Hall
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prevent main circuit overloadB
protect the circuit breaker blowout coilC
prevent alternator motorizationD
prevent low voltage tripout
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单选题Which of the following BEST describes the function of a redundant power supply？（）A
Provides additional diagnostic LEDsB
Reduces power consumptionC
Eliminates a single point of failureD
Reduces total cost of ownership
考题
单选题The total resistance of a parallel circuit is always （）.A
larger than the greatest branch resistanceB
smaller than the lowest branch resistanceC
equal to the sum of the individual branch resistancesD
one-half the sum of the individual branch resistances
考题
单选题Which of the electrical properties listed will always be the same for each component in a parallel circuit?（）A
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考题
单选题Which of the following statements is true concerning simple parallel resistance circuits?（）A
The total current flow equals the sum of the individual currentsB
The total current flow equals the reciprocal of the sum of the individual currentsC
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考题
单选题The energy consumed by an AC motor, as strictly reactive power, is （）A
used to do mechanical workB
used to establish the magnetic field of the motorC
lost as heat generated by the windingsD
lost in doing work to turn the motor itself
考题
单选题Main engine room control console alarms are to be of the self monitoring type, meaning that an open circuit to a particular alarm circuit will （）A
cause an alarm conditionB
secure power to the indicatorC
secure power to the monitored deviceD
automatically recluse within 10 seconds
考题
单选题A resistance in a circuit of unknown value is to be tested using the voltmeter/ammeter methodTherefore, the meters should be connected with（）.A
both meters in series with the resistanceB
both meters in parallel with the resistanceC
the ammeter in series and the voltmeter in parallel with the resistanceD
the ammeter in parallel and the voltmeter in series with the resistance
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单选题Which of the following is the BEST case scenario for power fault tolerance within a server？（）A
Redundant power supplies with one power supply connected and one power supply as a hot spare.B
Redundant power supplies with each connected to a separate power circuit.C
Redundant power supplies connected via a Y-cable.D
Redundant power supplies with each connected to the same power circuit.
考题
单选题Which of the following can occur if the maximum rated load is exceeded on an uninterruptible power supply (UPS)?（）A
There is a fire hazard potential if a power outage occurs.B
The last system plugged into the UPS will not be provided any power.C
The UPS will draw more power from the circuit to compensate.D
The runtime of the UPS will be insufficient if a power outage occurs.
考题
单选题Which of the following statements concerning a simple parallel resistance circuit is correct?（）A
The voltage drop across each resistor is the sameB
The total current flow equals the reciprocal of the sum of the individual currentsC
The total resistance equals the sum of the individual resistancesD
The total voltage equals the sum of the individual voltages across each resistance
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