Esco Electrical Certification (New 2026/
2027 Update) Questions & Answers {Grade
A} 100% Correct (Verified Solutions)
Amps can be calculated by: - Correct answer A. E/R
B.W/E
C.The square root of W/R
answer: D. all the above
Voltage can be calculated by - Correct answer I x R
An ohmmeter should never be connected to a? - Correct answer Charged capacitor
until it has been discharged
Which of the following would be considered an inductive load? - Correct answer
electric motor
The voltage to ground of a "high Leg" or "Stinger Leg" on a three phase open Delta
system will
,be approximately? - Correct answer 208 volts
Which of the following is the symbol for impedance? - Correct answer Z
What amperage measurement would you expect if you clamped your meter around
both wires in a two wire circuit? - Correct answer 0 due to the cancellation of the two
magnetic fields.
A diode is used to - Correct answer Control the direction of electron flow
Three resistors are wired parallel. Two have a value of 12 ohms, one of 6. What is the
total resistance? - Correct answer 3
A transformer has 1000 turns on the primary side and 500 on the secondary. What is
the output if the input is 120v? - Correct answer 60v
a transformer has 1000 turns on the primary side and 2000 on the secondary. What is
the output if the input is 120v? - Correct answer 240v
, If the conductor in an AC circuit is wound into a coil, the resulting EMF opposes supply
voltage. This is called: - Correct answer Inductive reactance.
To change rotation on a 3-phase motor: - Correct answer Change position of any two
wires.
A solenoid valve operates on the principle of: - Correct answer Electromagnetism
A ___ is commonly used on a single phase fractional horse power compressor to
disconnect the start winding. - Correct answer Current relay
The rotation of a single phase motor is determined by: - Correct answer The direction
of current through the start winding.
Single phase motor speed is determined by: - Correct answer Number of stator poles.
2027 Update) Questions & Answers {Grade
A} 100% Correct (Verified Solutions)
Amps can be calculated by: - Correct answer A. E/R
B.W/E
C.The square root of W/R
answer: D. all the above
Voltage can be calculated by - Correct answer I x R
An ohmmeter should never be connected to a? - Correct answer Charged capacitor
until it has been discharged
Which of the following would be considered an inductive load? - Correct answer
electric motor
The voltage to ground of a "high Leg" or "Stinger Leg" on a three phase open Delta
system will
,be approximately? - Correct answer 208 volts
Which of the following is the symbol for impedance? - Correct answer Z
What amperage measurement would you expect if you clamped your meter around
both wires in a two wire circuit? - Correct answer 0 due to the cancellation of the two
magnetic fields.
A diode is used to - Correct answer Control the direction of electron flow
Three resistors are wired parallel. Two have a value of 12 ohms, one of 6. What is the
total resistance? - Correct answer 3
A transformer has 1000 turns on the primary side and 500 on the secondary. What is
the output if the input is 120v? - Correct answer 60v
a transformer has 1000 turns on the primary side and 2000 on the secondary. What is
the output if the input is 120v? - Correct answer 240v
, If the conductor in an AC circuit is wound into a coil, the resulting EMF opposes supply
voltage. This is called: - Correct answer Inductive reactance.
To change rotation on a 3-phase motor: - Correct answer Change position of any two
wires.
A solenoid valve operates on the principle of: - Correct answer Electromagnetism
A ___ is commonly used on a single phase fractional horse power compressor to
disconnect the start winding. - Correct answer Current relay
The rotation of a single phase motor is determined by: - Correct answer The direction
of current through the start winding.
Single phase motor speed is determined by: - Correct answer Number of stator poles.
