ESCO ELECTRICAL EXAM SCRIPT 2025/2026 QUESTIONS
AND SOLUTIONS GRADED A+
✔✔Which of the following is equal to 100 milliamps? - ✔✔C. 0.10 amps
✔✔The meter on a house measures the ____ passing through it. - ✔✔C. Watts
✔✔What is the correct formula for determining wattage? - ✔✔A.W = E x I
✔✔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? - ✔✔B.60 volts
✔✔Three 300 ohm resistors are wired parallel. What is the total resistance? - ✔✔A.100
ohms
✔✔Amps can be calculated by: - ✔✔A. E/R
B.W/E
C.The square root of W/R
answer: D. all the above
✔✔Voltage can be calculated by: - ✔✔C.IxR
✔✔An ohmmeter should never be connected to a: - ✔✔D. Charged capacitor until it has
been discharged
✔✔Which of the following would be considered an inductive load? - ✔✔D. Electric motor
✔✔The voltage to ground of a high leg or "stinger leg" on a three phase open delta
system will be approximately: - ✔✔C. 208
✔✔Which of the following is the symbol for impedance? - ✔✔D. Z
✔✔What amperage measurement would you expect if you clamped your meter around
both wires in a two wire circuit? - ✔✔A.0 due to the cancellation of the two magnetic
fields
✔✔A diode is used to? - ✔✔A. 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? - ✔✔C. 3
✔✔A transformer has 1000 turns on the primary side and 500 on the secondary. What
is the output if the input is 120v? - ✔✔C. 60v
, ✔✔A transformer has 1000 turns on the primary side and 2000 on the secondary. What
is the output if the input is 120v? - ✔✔D. 240v
✔✔If the conductor in an AC circuit is wound into a coil, the resulting EMF opposes
supply voltage. This is called: - ✔✔B. Inductive reactance
✔✔To change rotation on a 3-phase motor: - ✔✔C. Change position of any two wires
✔✔A solenoid valve operates on the principle of: - ✔✔C. Electromagnetism
✔✔A ___ is commonly used on a single phase fractional horse power compressor to
disconnect the start winding. - ✔✔D. Current relay
✔✔The rotation of a single phase motor is determined by: - ✔✔A.The direction of
current through the start winding
✔✔Single phase motor speed is determined by: - ✔✔B. Number of stator poles
✔✔Capacitor-start, capacitor-run motors provide: - ✔✔B. Medium running and high
starting torque
✔✔Direct digital control (DDC) is: - ✔✔D. Electronic controls used for equipment control
and monitoring
✔✔What connects the T1, T2 and T3 terminals on a contactor? - ✔✔B. Load wires
✔✔A step-up transformer increases - ✔✔B. voltage
✔✔Utility companies usually provide residential homes with: - ✔✔B. 240v, single phase,
three wire
✔✔Transformers are rated by: - ✔✔B. VA at the secondary
✔✔Circuit breakers and fuses are used to provide: - ✔✔C. Protection from an overload
of current
✔✔Excessive current can be caused by: - ✔✔D. Short circuit
✔✔A device with overload protection used to control a motor is a: - ✔✔D. Line starter
✔✔What is the minimum number of wires required between two start/stop push button
controls? - ✔✔B. 1
AND SOLUTIONS GRADED A+
✔✔Which of the following is equal to 100 milliamps? - ✔✔C. 0.10 amps
✔✔The meter on a house measures the ____ passing through it. - ✔✔C. Watts
✔✔What is the correct formula for determining wattage? - ✔✔A.W = E x I
✔✔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? - ✔✔B.60 volts
✔✔Three 300 ohm resistors are wired parallel. What is the total resistance? - ✔✔A.100
ohms
✔✔Amps can be calculated by: - ✔✔A. E/R
B.W/E
C.The square root of W/R
answer: D. all the above
✔✔Voltage can be calculated by: - ✔✔C.IxR
✔✔An ohmmeter should never be connected to a: - ✔✔D. Charged capacitor until it has
been discharged
✔✔Which of the following would be considered an inductive load? - ✔✔D. Electric motor
✔✔The voltage to ground of a high leg or "stinger leg" on a three phase open delta
system will be approximately: - ✔✔C. 208
✔✔Which of the following is the symbol for impedance? - ✔✔D. Z
✔✔What amperage measurement would you expect if you clamped your meter around
both wires in a two wire circuit? - ✔✔A.0 due to the cancellation of the two magnetic
fields
✔✔A diode is used to? - ✔✔A. 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? - ✔✔C. 3
✔✔A transformer has 1000 turns on the primary side and 500 on the secondary. What
is the output if the input is 120v? - ✔✔C. 60v
, ✔✔A transformer has 1000 turns on the primary side and 2000 on the secondary. What
is the output if the input is 120v? - ✔✔D. 240v
✔✔If the conductor in an AC circuit is wound into a coil, the resulting EMF opposes
supply voltage. This is called: - ✔✔B. Inductive reactance
✔✔To change rotation on a 3-phase motor: - ✔✔C. Change position of any two wires
✔✔A solenoid valve operates on the principle of: - ✔✔C. Electromagnetism
✔✔A ___ is commonly used on a single phase fractional horse power compressor to
disconnect the start winding. - ✔✔D. Current relay
✔✔The rotation of a single phase motor is determined by: - ✔✔A.The direction of
current through the start winding
✔✔Single phase motor speed is determined by: - ✔✔B. Number of stator poles
✔✔Capacitor-start, capacitor-run motors provide: - ✔✔B. Medium running and high
starting torque
✔✔Direct digital control (DDC) is: - ✔✔D. Electronic controls used for equipment control
and monitoring
✔✔What connects the T1, T2 and T3 terminals on a contactor? - ✔✔B. Load wires
✔✔A step-up transformer increases - ✔✔B. voltage
✔✔Utility companies usually provide residential homes with: - ✔✔B. 240v, single phase,
three wire
✔✔Transformers are rated by: - ✔✔B. VA at the secondary
✔✔Circuit breakers and fuses are used to provide: - ✔✔C. Protection from an overload
of current
✔✔Excessive current can be caused by: - ✔✔D. Short circuit
✔✔A device with overload protection used to control a motor is a: - ✔✔D. Line starter
✔✔What is the minimum number of wires required between two start/stop push button
controls? - ✔✔B. 1
