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Esco Electrical Certification Exam
Questions With Verified Answers
A.W = E x I - correct -answer-What is the correct formula for determining wattage?
B.60 volts - correct -answer-A parallel circuit consists of three resistors; R1 = 30
ohms, R2 = 15 ohms, R3 = 10 ohms. If the current through R2 = 4 amps, what is
the source voltage?
A.100 ohms - correct -answer-Three 300 ohm resistors are wired parallel. What is
the total resistance?
A. E/R
B.W/E
C.The square root of W/R
answer: D. all the above - correct -answer-Amps can be calculated by:
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C.IxR - correct -answer-Voltage can be calculated by:
D. Charged capacitor until it has been discharged - correct -answer-An ohmmeter
should never be connected to a:
D. Electric motor - correct -answer-Which of the following would be considered an
inductive load?
C. 208 - correct -answer-The voltage to ground of a high leg or "stinger leg" on a
three phase open delta system will be approximately:
D. Z - correct -answer-Which of the following is the symbol for impedance?
A.0 due to the cancellation of the two magnetic fields - correct -answer-What
amperage measurement would you expect if you clamped your meter around
both wires in a two wire circuit?
A. Control the direction of electron flow - correct -answer-A diode is used to?
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C. 3 - correct -answer-Three resistors are wired parallel. Two have a value of 12
ohms, one of 6. What is the total resistance?
C. 60v - correct -answer-A transformer has 1000 turns on the primary side and
500 on the secondary. What is the output if the input is 120v?
D. 240v - correct -answer-A transformer has 1000 turns on the primary side and
2000 on the secondary. What is the output if the input is 120v?
B. Inductive reactance - correct -answer-If the conductor in an AC circuit is wound
into a coil, the resulting EMF opposes supply voltage. This is called:
C. Change position of any two wires - correct -answer-To change rotation on a 3-
phase motor:
C. Electromagnetism - correct -answer-A solenoid valve operates on the principle
of:
Esco Electrical Certification Exam
Questions With Verified Answers
A.W = E x I - correct -answer-What is the correct formula for determining wattage?
B.60 volts - correct -answer-A parallel circuit consists of three resistors; R1 = 30
ohms, R2 = 15 ohms, R3 = 10 ohms. If the current through R2 = 4 amps, what is
the source voltage?
A.100 ohms - correct -answer-Three 300 ohm resistors are wired parallel. What is
the total resistance?
A. E/R
B.W/E
C.The square root of W/R
answer: D. all the above - correct -answer-Amps can be calculated by:
,2|Page
C.IxR - correct -answer-Voltage can be calculated by:
D. Charged capacitor until it has been discharged - correct -answer-An ohmmeter
should never be connected to a:
D. Electric motor - correct -answer-Which of the following would be considered an
inductive load?
C. 208 - correct -answer-The voltage to ground of a high leg or "stinger leg" on a
three phase open delta system will be approximately:
D. Z - correct -answer-Which of the following is the symbol for impedance?
A.0 due to the cancellation of the two magnetic fields - correct -answer-What
amperage measurement would you expect if you clamped your meter around
both wires in a two wire circuit?
A. Control the direction of electron flow - correct -answer-A diode is used to?
, 3|Page
C. 3 - correct -answer-Three resistors are wired parallel. Two have a value of 12
ohms, one of 6. What is the total resistance?
C. 60v - correct -answer-A transformer has 1000 turns on the primary side and
500 on the secondary. What is the output if the input is 120v?
D. 240v - correct -answer-A transformer has 1000 turns on the primary side and
2000 on the secondary. What is the output if the input is 120v?
B. Inductive reactance - correct -answer-If the conductor in an AC circuit is wound
into a coil, the resulting EMF opposes supply voltage. This is called:
C. Change position of any two wires - correct -answer-To change rotation on a 3-
phase motor:
C. Electromagnetism - correct -answer-A solenoid valve operates on the principle
of:
