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单选题 Before a megohmmeter is connected to a conductor or a circuit, the circuit must be ____, when testing the insulation
学科：船舶电子电气专业英语2
时间：2025-12-01 15:04:51
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题目1单选题
A voltmeter is connected in a circuit in ______A. series parallelB. parallelC. relayD. series
题目2单选题
When using a voltmeter, the caution is: Do not leave a meter connected with the polarity ________A. reveredB. conversedC. seriesD. resistance
题目3单选题
An ammeter usually can be used to measure ____A. the voltage between two points in a circuitB. current flow in a circuitC. total or partial circuit resistanceD. circuit continuity
题目4单选题
Which of the following is used to measure DC and AC voltage, current and resistanceA. ThermometerB. MultimeterC. OhmmeterD. Ammeter
题目5单选题
Which is not one of the common grounds of the analog multimeter and the digital multimeterA. They both have a positive jack and a common jack for the test leadsB. They both use an electronic numerical displayC. They both have a function switchD. They both have a range switch for accurate readings
题目6单选题
As to the following measuring instrument, which of the following statements is TRUE?<img src="https://tihai-oss-cloud.itihey.com/img/52152ca6d5a70c3ee9dfb3278f70687c.png">A. A megohmmeter is an instrument used to measure very high values of resistanceB. A multimeter can measure DC. and A.C. voltages, D.C. current, and resistanceC. It is designed only to measure the amount of current in a circuitD. It is always connected in parallel with the circuit
题目7单选题
Which of the following statements about voltmeters is not trueA. It can be used for the same applications as the voltage testerB. It is more accurate than the voltage testerC. Voltmeters always have one scaleD. It is connected in parallel with the circuit
题目8单选题
A/An ______ is capable of measuring DC and AC voltage, current and resistance.A. ammeterB. multimeterC. frequency meterD. thermometer
题目9单选题
______ is used to measure the currentA. Current meterB. SynchrometerC. VoltmeterD. Ammeter
题目10单选题
Before a megohmmeter is connected to a conductor or a circuit, the circuit must be ____, when testing the insulationA. decoupledB. dismantledC. energizedD. deenergized
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