CO ELECTRICAL SIGN CONTRACTOR EXAM
QUESTIONS AND CORRECT NSWERS (VERIFIED
ANSWERS) Q&A 2027 |INSTANT DOWNLOAD PDF
1. What is the primary purpose of an electrical disconnect for
a sign?
A. Increase lamp brightness
B. Provide a means to safely disconnect power
C. Reduce sign weight
D. Improve the sign's appearance
Correct answer: B. Provide a means to safely disconnect power
Rationale: A disconnect allows the sign circuit to be de-
energized for servicing, maintenance, and emergency purposes.
2. Which electrical quantity is measured in volts?
A. Current
B. Resistance
C. Voltage
D. Power
Correct answer: C. Voltage
Rationale: Voltage is the electrical potential difference and is
measured in volts.
3. Which unit is used to measure electrical current?
A. Ohm
B. Ampere
,C. Watt
D. Volt
Correct answer: B. Ampere
Rationale: Electrical current is measured in amperes,
commonly called amps.
4. What instrument is commonly used to measure voltage?
A. Ammeter
B. Ohmmeter
C. Voltmeter
D. Wattmeter
Correct answer: C. Voltmeter
Rationale: A voltmeter measures electrical potential difference
between two points.
5. What does an overcurrent protective device primarily
protect?
A. Paint
B. Conductors and equipment from excessive current
C. Sign lettering
D. Concrete foundations only
Correct answer: B. Conductors and equipment from excessive
current
Rationale: Fuses and circuit breakers interrupt excessive
current before conductors or equipment are damaged.
6. What is the purpose of equipment grounding?
A. Increase voltage
,B. Provide a low-impedance fault-current path
C. Reduce sign weight
D. Increase lamp temperature
Correct answer: B. Provide a low-impedance fault-current path
Rationale: Equipment grounding helps facilitate operation of
protective devices during ground faults.
7. Which conductor is normally identified by white or gray
insulation in a typical AC circuit?
A. Grounding electrode conductor
B. Ungrounded conductor
C. Grounded conductor
D. Equipment grounding conductor
Correct answer: C. Grounded conductor
Rationale: The grounded circuit conductor is commonly
identified as the neutral and is generally white or gray.
8. Which conductor is commonly identified by green
insulation?
A. Neutral
B. Ungrounded conductor
C. Equipment grounding conductor
D. Switch leg
Correct answer: C. Equipment grounding conductor
Rationale: Green or green with yellow stripes is commonly
used to identify equipment grounding conductors.
, 9. What is the purpose of a circuit breaker?
A. Provide lighting
B. Protect against excessive current
C. Increase conductor size
D. Ground the sign face
Correct answer: B. Protect against excessive current
Rationale: A circuit breaker opens the circuit when current
exceeds its intended rating.
10. What does Ohm's law relate?
A. Voltage, current, and resistance
B. Weight, length, and area
C. Frequency, height, and width
D. Power, color, and temperature
Correct answer: A. Voltage, current, and resistance
Rationale: Ohm's law is commonly expressed as V = I × R.
11. If voltage remains constant and resistance increases,
current generally will:
A. Increase
B. Decrease
C. Become infinite
D. Remain exactly the same
Correct answer: B. Decrease
Rationale: According to Ohm's law, current decreases as
resistance increases when voltage remains constant.
QUESTIONS AND CORRECT NSWERS (VERIFIED
ANSWERS) Q&A 2027 |INSTANT DOWNLOAD PDF
1. What is the primary purpose of an electrical disconnect for
a sign?
A. Increase lamp brightness
B. Provide a means to safely disconnect power
C. Reduce sign weight
D. Improve the sign's appearance
Correct answer: B. Provide a means to safely disconnect power
Rationale: A disconnect allows the sign circuit to be de-
energized for servicing, maintenance, and emergency purposes.
2. Which electrical quantity is measured in volts?
A. Current
B. Resistance
C. Voltage
D. Power
Correct answer: C. Voltage
Rationale: Voltage is the electrical potential difference and is
measured in volts.
3. Which unit is used to measure electrical current?
A. Ohm
B. Ampere
,C. Watt
D. Volt
Correct answer: B. Ampere
Rationale: Electrical current is measured in amperes,
commonly called amps.
4. What instrument is commonly used to measure voltage?
A. Ammeter
B. Ohmmeter
C. Voltmeter
D. Wattmeter
Correct answer: C. Voltmeter
Rationale: A voltmeter measures electrical potential difference
between two points.
5. What does an overcurrent protective device primarily
protect?
A. Paint
B. Conductors and equipment from excessive current
C. Sign lettering
D. Concrete foundations only
Correct answer: B. Conductors and equipment from excessive
current
Rationale: Fuses and circuit breakers interrupt excessive
current before conductors or equipment are damaged.
6. What is the purpose of equipment grounding?
A. Increase voltage
,B. Provide a low-impedance fault-current path
C. Reduce sign weight
D. Increase lamp temperature
Correct answer: B. Provide a low-impedance fault-current path
Rationale: Equipment grounding helps facilitate operation of
protective devices during ground faults.
7. Which conductor is normally identified by white or gray
insulation in a typical AC circuit?
A. Grounding electrode conductor
B. Ungrounded conductor
C. Grounded conductor
D. Equipment grounding conductor
Correct answer: C. Grounded conductor
Rationale: The grounded circuit conductor is commonly
identified as the neutral and is generally white or gray.
8. Which conductor is commonly identified by green
insulation?
A. Neutral
B. Ungrounded conductor
C. Equipment grounding conductor
D. Switch leg
Correct answer: C. Equipment grounding conductor
Rationale: Green or green with yellow stripes is commonly
used to identify equipment grounding conductors.
, 9. What is the purpose of a circuit breaker?
A. Provide lighting
B. Protect against excessive current
C. Increase conductor size
D. Ground the sign face
Correct answer: B. Protect against excessive current
Rationale: A circuit breaker opens the circuit when current
exceeds its intended rating.
10. What does Ohm's law relate?
A. Voltage, current, and resistance
B. Weight, length, and area
C. Frequency, height, and width
D. Power, color, and temperature
Correct answer: A. Voltage, current, and resistance
Rationale: Ohm's law is commonly expressed as V = I × R.
11. If voltage remains constant and resistance increases,
current generally will:
A. Increase
B. Decrease
C. Become infinite
D. Remain exactly the same
Correct answer: B. Decrease
Rationale: According to Ohm's law, current decreases as
resistance increases when voltage remains constant.
