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Electrical Theory Practice Test Exam Questions and Answers.
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Electrical Theory Practice Test Exam Questions and Answers.Electrical Theory Practice Test Exam Questions and Answers.
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Electrical Theory Practice Test Exam Questions andAnswers.
Voltmeter - ANS A high resistance is connected in series with the internal coil of a
galvanometer to make?
If a transformer ratio is 20/1, what does it mean for the secondary? - ANS The primary
voltage is 20 times greater than that of the secondary.
If a motor enclosure is designed to contain sparks or flashes that could ignite
surrounding vapors or gases, then the enclosure is considered to be which of the
following: - ANS Ventilated
The output of a 3-phase transformer is measured in what units? - ANS Amperes
In order to change the rotation of a DC series motor, what must be done? - ANS F1 and
F2 must be reversed.
What does Bonding do? - ANS Controls the load on the system installation
A meter used to measure both AC and DC voltage and current is known as? - ANS
MultiMate
What material is used on conduits inside and outside of a box? - ANS Couplings
If a transformer has a voltage step-down from 117 volts to 6 volts then the ratio of the
transformer is equal to what? - ANS 1: 19, 5
If the power factor of a circuit is increased, then what occurs? - ANS The reactive power
is decreased
In a 3Ø circuit, how many electrical degrees separate each phase: - ANS 120
Ground fault protection for personnel on a 120 volt single-phase circuit is based on? -
ANS Unbalanced current between the grounded and ungrounded conductor.
Electrical appliances shall be installed in parallel in order to make the operation of each
appliance in- dependent of the others. - ANS True
In order to calculate watt hours, which formulas must be used? - ANS Amps/Volts
(Amps Divided By Volts)
The peak value of AC voltage determines the breakdown voltage of insulation. - ANS
TRUE
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