Page |1
Esco Electrical Certification Questions with
Detailed Verified Answers (100% Correct
Answers) /Already Graded A+
What is current flow?
Ans: The flow of electrons in a circuit.
What is impedance?
Ans: opposition to alternating currents
Like charges will
Ans: Repel each other
Any material that will readily release electrons is called
Ans: conductor
Symbol for current
Ans: I (amps)
Electricity can produce:
Ans: All the above
light
heat
magnetism
The safety ground conductor is usually colored:
Ans: Green
An electron has a ____
Ans: negative charge
Which of the following materials would be best suited for use as a semi-conductor?
Ans: Silicon
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Which of the following meters must use internal power to check a load or circuit?
Ans: Ohmmeter
What would be the result if a 24 volt, 20 ohm contactor coil was wired in series with a 24 volt, 200
ohm control relay?
Ans: Only the control relay would operate
Three defrost heaters, each 15 ohms, are wired in parallel to a 120 volt power supply. How many
Watts are consumed?
Ans: 2880
When testing a capacitor with an analog or digital ohmmeter, the meter should:
Ans: Measure low resistance then return to a high reading.
How much resistance must be placed in a 120 volt circuit to limit the current to 2 amps?
Ans: 60 ohms
What is resistance?
Ans: opposition to electron flow
In electrical wiring, a black colored wire indicates
Ans: A hot conductor
How many watts are used by a heater operating on 460 volts and drawing 5 amps?
Ans: 2300
How are fuses sized?
A: By amperage
B: By microfarads
C: By voltage
D: Both a and c
Ans: Both A and C
Esco Electrical Certification Questions with
Detailed Verified Answers (100% Correct
Answers) /Already Graded A+
What is current flow?
Ans: The flow of electrons in a circuit.
What is impedance?
Ans: opposition to alternating currents
Like charges will
Ans: Repel each other
Any material that will readily release electrons is called
Ans: conductor
Symbol for current
Ans: I (amps)
Electricity can produce:
Ans: All the above
light
heat
magnetism
The safety ground conductor is usually colored:
Ans: Green
An electron has a ____
Ans: negative charge
Which of the following materials would be best suited for use as a semi-conductor?
Ans: Silicon
, Page |2
Which of the following meters must use internal power to check a load or circuit?
Ans: Ohmmeter
What would be the result if a 24 volt, 20 ohm contactor coil was wired in series with a 24 volt, 200
ohm control relay?
Ans: Only the control relay would operate
Three defrost heaters, each 15 ohms, are wired in parallel to a 120 volt power supply. How many
Watts are consumed?
Ans: 2880
When testing a capacitor with an analog or digital ohmmeter, the meter should:
Ans: Measure low resistance then return to a high reading.
How much resistance must be placed in a 120 volt circuit to limit the current to 2 amps?
Ans: 60 ohms
What is resistance?
Ans: opposition to electron flow
In electrical wiring, a black colored wire indicates
Ans: A hot conductor
How many watts are used by a heater operating on 460 volts and drawing 5 amps?
Ans: 2300
How are fuses sized?
A: By amperage
B: By microfarads
C: By voltage
D: Both a and c
Ans: Both A and C
