#1
Which instrument is used to measure electrical resistance?
Ohmmeter
ExplanationMeasures resistance in electrical circuits.
#2
What is the SI unit of electric current?
Ampere
ExplanationStandard unit for measuring electric current.
#3
Which instrument is used to measure the power consumption of an electrical appliance?
Wattmeter
ExplanationMeasures the power consumed by an electrical device.
#4
Which of the following is used to protect electrical circuits from overcurrent?
Fuse
ExplanationDisrupts electrical flow when current exceeds a safe level.
#5
Which of the following is NOT a type of electrical test equipment?
Thermometer
ExplanationNot typically used for electrical testing; measures temperature.
#6
Which of the following is not a type of multimeter?
Cathode-ray oscilloscope
ExplanationNot a type of multimeter; it's a different instrument for visualizing electrical signals.
#7
What does an oscilloscope measure?
Voltage
ExplanationMeasures voltage changes over time.
#8
What is the function of a continuity tester?
Testing for open circuits
ExplanationIdentifies the continuity or lack thereof in electrical circuits.
#9
What is the purpose of a function generator?
To generate electrical signals
ExplanationProduces specific electrical waveforms for testing and signal generation.
#10
What does a tachometer measure?
Speed
ExplanationRecords the speed of rotation of a mechanical component.
#11
What is the purpose of a megger?
To test insulation resistance
ExplanationPrimarily used to assess insulation resistance in electrical systems.
#12
What does a phase sequence indicator determine?
Phase rotation
ExplanationIdentifies the sequence of phases in a polyphase electrical system.
#13
Which instrument is used to detect the presence of an electric field?
Field strength meter
ExplanationMeasures the strength of electric fields in a given area.
#14
What is the primary application of a hipot tester?
To test insulation strength
ExplanationAssesses the dielectric strength of electrical insulation.
#15
What is the primary function of a relay tester?
To test relay operation
ExplanationEvaluates the functionality and performance of electrical relays.