AK Electrical Administrator – Controls
Exam Practice Questions And Correct
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Rationales 2027 Q&A | Instant
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General Electrical Knowledge
1. In Alaska, the Controls and Control Wiring category primarily covers
low-voltage control wiring at what maximum voltage?
A. 24 volts
B. 48 volts
C. 120 volts
D. 240 volts
Answer: B. 48 volts
Rationale: The Alaska Controls and Control Wiring category covers low-
voltage controls and control wiring rated at 48 volts or less.
, 2. Which type of electrical quantity is measured in volts?
A. Current
B. Resistance
C. Voltage
D. Power
Answer: C. Voltage
Rationale: Voltage is the electrical potential difference between two points
and is measured in volts.
3. Which instrument is normally used to measure electrical resistance?
A. Ammeter
B. Voltmeter
C. Ohmmeter
D. Wattmeter
Answer: C. Ohmmeter
Rationale: An ohmmeter measures resistance in ohms and is normally used
on a de-energized circuit.
4. What is the relationship expressed by Ohm's law?
A. P = EI
B. E = IR
,C. I = EP
D. R = EI
Answer: B. E = IR
Rationale: Ohm's law states that voltage equals current multiplied by
resistance.
5. A 24-volt control circuit has a resistance of 12 ohms. Approximately
how much current flows?
A. 0.5 ampere
B. 1 ampere
C. 2 amperes
D. 12 amperes
Answer: C. 2 amperes
Rationale: Using I = E/R, 24 volts divided by 12 ohms equals 2 amperes.
6. What is the primary purpose of a control circuit?
A. To provide unlimited power to a load
B. To regulate or initiate operation of equipment
C. To replace the grounding system
D. To eliminate overcurrent protection
Answer: B. To regulate or initiate operation of equipment
, Rationale: Control circuits operate, regulate, sequence, or monitor
equipment such as motors, HVAC systems, valves, and process equipment.
7. Which condition is most likely to cause excessive voltage drop in a
low-voltage control circuit?
A. Short conductors with large wire size
B. Long conductors with insufficient conductor size
C. Low ambient temperature only
D. Properly sized conductors
Answer: B. Long conductors with insufficient conductor size
Rationale: Long conductor runs and undersized conductors increase
resistance and can produce excessive voltage drop.
8. What does a normally open contact do when its associated device is
not actuated?
A. Provides a continuous circuit
B. Opens the circuit
C. Grounds the circuit
D. Increases voltage
Answer: B. Opens the circuit
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationales 2027 Q&A | Instant
Download Pdf
General Electrical Knowledge
1. In Alaska, the Controls and Control Wiring category primarily covers
low-voltage control wiring at what maximum voltage?
A. 24 volts
B. 48 volts
C. 120 volts
D. 240 volts
Answer: B. 48 volts
Rationale: The Alaska Controls and Control Wiring category covers low-
voltage controls and control wiring rated at 48 volts or less.
, 2. Which type of electrical quantity is measured in volts?
A. Current
B. Resistance
C. Voltage
D. Power
Answer: C. Voltage
Rationale: Voltage is the electrical potential difference between two points
and is measured in volts.
3. Which instrument is normally used to measure electrical resistance?
A. Ammeter
B. Voltmeter
C. Ohmmeter
D. Wattmeter
Answer: C. Ohmmeter
Rationale: An ohmmeter measures resistance in ohms and is normally used
on a de-energized circuit.
4. What is the relationship expressed by Ohm's law?
A. P = EI
B. E = IR
,C. I = EP
D. R = EI
Answer: B. E = IR
Rationale: Ohm's law states that voltage equals current multiplied by
resistance.
5. A 24-volt control circuit has a resistance of 12 ohms. Approximately
how much current flows?
A. 0.5 ampere
B. 1 ampere
C. 2 amperes
D. 12 amperes
Answer: C. 2 amperes
Rationale: Using I = E/R, 24 volts divided by 12 ohms equals 2 amperes.
6. What is the primary purpose of a control circuit?
A. To provide unlimited power to a load
B. To regulate or initiate operation of equipment
C. To replace the grounding system
D. To eliminate overcurrent protection
Answer: B. To regulate or initiate operation of equipment
, Rationale: Control circuits operate, regulate, sequence, or monitor
equipment such as motors, HVAC systems, valves, and process equipment.
7. Which condition is most likely to cause excessive voltage drop in a
low-voltage control circuit?
A. Short conductors with large wire size
B. Long conductors with insufficient conductor size
C. Low ambient temperature only
D. Properly sized conductors
Answer: B. Long conductors with insufficient conductor size
Rationale: Long conductor runs and undersized conductors increase
resistance and can produce excessive voltage drop.
8. What does a normally open contact do when its associated device is
not actuated?
A. Provides a continuous circuit
B. Opens the circuit
C. Grounds the circuit
D. Increases voltage
Answer: B. Opens the circuit
