ETCP Certified Entertainment Electrician
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
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1. Which type of cable is most commonly used for high-power theatrical
lighting circuits?
A. Cat5
B. SOOW
C. RG6
D. HDMI
Answer: SOOW
Rationale: SOOW cables are flexible, durable, and rated for high amperage
and outdoor use, making them ideal for theatrical power distribution.
,2. What is the primary purpose of a circuit breaker in an entertainment
electrical system?
A. Increase voltage
B. Protect circuits from overcurrent
C. Convert AC to DC
D. Measure current
Answer: Protect circuits from overcurrent
Rationale: Circuit breakers interrupt the electrical flow when the current
exceeds the safe rating, preventing fires and equipment damage.
3. In a three-phase system, what is the voltage between any two phases in
a 208V system?
A. 120V
B. 208V
C. 208V line-to-line
D. 240V
Answer: 208V line-to-line
Rationale: In a 208V three-phase wye system, phase-to-neutral voltage is
120V, and phase-to-phase (line-to-line) voltage is 208V.
4. What color is typically used for the neutral conductor in the U.S.?
A. Red
,B. White
C. Green
D. Black
Answer: White
Rationale: White is the standard color code for neutral conductors in U.S.
electrical systems.
5. Which device is used to dim traditional incandescent stage lights?
A. Relay
B. Transformer
C. SCR dimmer
D. Circuit breaker
Answer: SCR dimmer
Rationale: Silicon-Controlled Rectifiers (SCRs) control the RMS voltage to the
lamp, effectively dimming incandescent lighting.
6. What is the typical frequency of AC power in the U.S.?
A. 50 Hz
B. 60 Hz
C. 60 Hz
D. 120 Hz
, Answer: 60 Hz
Rationale: Standard AC mains in the U.S. operates at 60 cycles per second, or
60 Hz.
7. Which type of connector is commonly used for stage lighting
instruments?
A. USB-C
B. Edison (stage pin)
C. RJ45
D. HDMI
Answer: Edison (stage pin)
Rationale: Stage pin connectors are designed for high-current theatrical
lighting and allow secure connections in live environments.
8. What is the minimum wire size for a 20A lighting circuit according to
NEC standards?
A. 18 AWG
B. 14 AWG
C. 12 AWG
D. 10 AWG
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant
Download Pdf
1. Which type of cable is most commonly used for high-power theatrical
lighting circuits?
A. Cat5
B. SOOW
C. RG6
D. HDMI
Answer: SOOW
Rationale: SOOW cables are flexible, durable, and rated for high amperage
and outdoor use, making them ideal for theatrical power distribution.
,2. What is the primary purpose of a circuit breaker in an entertainment
electrical system?
A. Increase voltage
B. Protect circuits from overcurrent
C. Convert AC to DC
D. Measure current
Answer: Protect circuits from overcurrent
Rationale: Circuit breakers interrupt the electrical flow when the current
exceeds the safe rating, preventing fires and equipment damage.
3. In a three-phase system, what is the voltage between any two phases in
a 208V system?
A. 120V
B. 208V
C. 208V line-to-line
D. 240V
Answer: 208V line-to-line
Rationale: In a 208V three-phase wye system, phase-to-neutral voltage is
120V, and phase-to-phase (line-to-line) voltage is 208V.
4. What color is typically used for the neutral conductor in the U.S.?
A. Red
,B. White
C. Green
D. Black
Answer: White
Rationale: White is the standard color code for neutral conductors in U.S.
electrical systems.
5. Which device is used to dim traditional incandescent stage lights?
A. Relay
B. Transformer
C. SCR dimmer
D. Circuit breaker
Answer: SCR dimmer
Rationale: Silicon-Controlled Rectifiers (SCRs) control the RMS voltage to the
lamp, effectively dimming incandescent lighting.
6. What is the typical frequency of AC power in the U.S.?
A. 50 Hz
B. 60 Hz
C. 60 Hz
D. 120 Hz
, Answer: 60 Hz
Rationale: Standard AC mains in the U.S. operates at 60 cycles per second, or
60 Hz.
7. Which type of connector is commonly used for stage lighting
instruments?
A. USB-C
B. Edison (stage pin)
C. RJ45
D. HDMI
Answer: Edison (stage pin)
Rationale: Stage pin connectors are designed for high-current theatrical
lighting and allow secure connections in live environments.
8. What is the minimum wire size for a 20A lighting circuit according to
NEC standards?
A. 18 AWG
B. 14 AWG
C. 12 AWG
D. 10 AWG
