Florida Industrial Electrical Technician
Exam Practice Questions And Correct
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Rationale 2026 Q&A| Instant Download
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1. An industrial facility is upgrading its three-phase motor control
system. A 480V, 3-phase induction motor draws 28A at full load with a
power factor of 0.85. What is the approximate real power consumed
by the motor?
A. 11.7 kW
B. 19.7 kW
C. 22.4 kW
D. 28.9 kW
The real power in a three-phase system is calculated using P = √3 × V × I ×
PF. Substituting the values gives approximately 19.7 kW, which represents
,the actual usable power converted from electrical energy into mechanical
output.
2. A technician is troubleshooting a control circuit that repeatedly trips a
10A breaker. The measured current is 14A. What is the most likely
cause?
A. Undervoltage supply
B. Open neutral condition
C. Overloaded circuit condition
D. Faulty voltage regulator
When current exceeds the breaker rating consistently, the most probable
cause is circuit overload, meaning the connected load demands more
current than the protective device is designed to handle.
3. In an industrial panel, what is the primary purpose of a ground fault
relay?
A. Increase system voltage stability
B. Reduce harmonic distortion
C. Detect leakage current to ground and trip the circuit
D. Balance three-phase loads
,A ground fault relay detects unintended current flow to ground, protecting
equipment and personnel by disconnecting the circuit when leakage
exceeds safe limits.
4. A 240V heater draws 12.5A. What is its resistance?
A. 12.8 ohms
B. 19.2 ohms
C. 22.5 ohms
D. 30.4 ohms
Using Ohm’s Law (R = V / I), dividing 240V by 12.5A yields 19.2 ohms,
representing the electrical resistance of the heating element.
5. What is the main function of a contactor in industrial electrical
systems?
A. Measure energy consumption
B. Step down voltage
C. Switch high-power loads using a low-power control signal
D. Store electrical energy
A contactor is an electrically controlled switching device used to remotely
control high-power circuits using low-power control signals, commonly in
motor control applications.
6. A 3-phase system becomes unbalanced when:
, A. All line currents are equal
B. Voltage is constant across all phases
C. Currents or voltages differ significantly between phases
D. Power factor equals 1
An unbalanced system occurs when phase currents or voltages are not
equal, potentially causing overheating and reduced efficiency in industrial
equipment.
7. Which instrument is best for measuring insulation resistance in
cables?
A. Clamp meter
B. Multimeter
C. Wattmeter
D. Megohmmeter (Megger)
A megohmmeter applies high voltage to measure insulation resistance,
helping detect breakdowns or leakage in cable insulation systems.
8. A motor rated at 15 HP operates at 90% efficiency. What is its
approximate output power in kW?
A. 8.9 kW
B. 9.2 kW
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationale 2026 Q&A| Instant Download
1. An industrial facility is upgrading its three-phase motor control
system. A 480V, 3-phase induction motor draws 28A at full load with a
power factor of 0.85. What is the approximate real power consumed
by the motor?
A. 11.7 kW
B. 19.7 kW
C. 22.4 kW
D. 28.9 kW
The real power in a three-phase system is calculated using P = √3 × V × I ×
PF. Substituting the values gives approximately 19.7 kW, which represents
,the actual usable power converted from electrical energy into mechanical
output.
2. A technician is troubleshooting a control circuit that repeatedly trips a
10A breaker. The measured current is 14A. What is the most likely
cause?
A. Undervoltage supply
B. Open neutral condition
C. Overloaded circuit condition
D. Faulty voltage regulator
When current exceeds the breaker rating consistently, the most probable
cause is circuit overload, meaning the connected load demands more
current than the protective device is designed to handle.
3. In an industrial panel, what is the primary purpose of a ground fault
relay?
A. Increase system voltage stability
B. Reduce harmonic distortion
C. Detect leakage current to ground and trip the circuit
D. Balance three-phase loads
,A ground fault relay detects unintended current flow to ground, protecting
equipment and personnel by disconnecting the circuit when leakage
exceeds safe limits.
4. A 240V heater draws 12.5A. What is its resistance?
A. 12.8 ohms
B. 19.2 ohms
C. 22.5 ohms
D. 30.4 ohms
Using Ohm’s Law (R = V / I), dividing 240V by 12.5A yields 19.2 ohms,
representing the electrical resistance of the heating element.
5. What is the main function of a contactor in industrial electrical
systems?
A. Measure energy consumption
B. Step down voltage
C. Switch high-power loads using a low-power control signal
D. Store electrical energy
A contactor is an electrically controlled switching device used to remotely
control high-power circuits using low-power control signals, commonly in
motor control applications.
6. A 3-phase system becomes unbalanced when:
, A. All line currents are equal
B. Voltage is constant across all phases
C. Currents or voltages differ significantly between phases
D. Power factor equals 1
An unbalanced system occurs when phase currents or voltages are not
equal, potentially causing overheating and reduced efficiency in industrial
equipment.
7. Which instrument is best for measuring insulation resistance in
cables?
A. Clamp meter
B. Multimeter
C. Wattmeter
D. Megohmmeter (Megger)
A megohmmeter applies high voltage to measure insulation resistance,
helping detect breakdowns or leakage in cable insulation systems.
8. A motor rated at 15 HP operates at 90% efficiency. What is its
approximate output power in kW?
A. 8.9 kW
B. 9.2 kW
