WA MASTER ELECTRICIAN 07 NONRESIDENTIAL
MAINTENANCE EXAM (OLD VERSION)
MASTER ELECTRICIAN 07 – NONRESIDENTIAL
MAINTENANCE CERTIFICATION EXAMINATION
================================================================================
EXAM OVERVIEW & INSTRUCTIONS
Exam Information:
- Exam Title: Washington Master Electrician 07 Nonresidential Maintenance (Old
Version)
- License Type: Master Specialty Electrician – 07 Nonresidential Maintenance
- Total Questions: This practice exam contains 250 questions
- Question Types: Multiple choice, true/false, and fill-in-the-blank
- Time Allowed: 4 hours (240 minutes)
- Passing Score: 75% (188 correct out of 250)
- Open Book: NEC Code Book and Washington Amendments permitted
- Exam Provider: Washington State Department of Labor & Industries – Electrical
Program
Content Areas Covered:
1. Electrical Theory (Questions 1-30)
2. National Electrical Code – General Requirements (Questions 31-55)
3. Branch Circuits and Feeders (Questions 56-75)
4. Overcurrent Protection (Questions 76-100)
5. Grounding and Bonding (Questions 101-125)
,6. Wiring Methods and Materials (Questions 126-150)
7. Motors, HVAC, Generators, and Transformers (Questions 151-175)
8. Hazardous (Classified) Locations (Questions 176-190)
9. Special Occupancies and Equipment (Questions 191-205)
10. Emergency and Standby Systems (Questions 206-215)
11. Washington‑Specific Code Amendments (RCW & WAC) (Questions 216-235)
12. Electrical Safety – Lockout/Tagout, PPE, Maintenance (Questions 236-250)
Instructions:
- Select the single best answer for each question
- Correct answers are indicated in BOLD
- Detailed rationales are provided for each answer
- Use the NEC Code Book and Washington amendments as references
- Mark your answers on a separate answer sheet
================================================================================
SECTION 1: ELECTRICAL THEORY (Questions 1-30)
1. The opposition to the flow of alternating current (AC) in a circuit, combining
resistance, inductive reactance, and capacitive reactance, is called:
A) Conductance
B) Impedance
C) Admittance
D) Susceptance
Answer: B) Impedance
,Explanation: Impedance (Z) is the total opposition to current flow in an AC
circuit. It is the vector sum of resistance (R), inductive reactance (XL), and
capacitive reactance (XC). Impedance is measured in ohms.[reference:0]
2. In a purely resistive AC circuit, the current and voltage are:
A) 90 degrees out of phase
B) 180 degrees out of phase
C) In phase
D) 45 degrees out of phase
Answer: C) In phase
Explanation: In a purely resistive circuit, voltage and current are in phase
with each other, meaning they reach their maximum and minimum values at the
same time.
3. The power factor of an AC circuit is defined as:
A) The ratio of apparent power to true power
B) The ratio of true power to apparent power
C) The product of voltage and current
D) The reciprocal of impedance
Answer: B) The ratio of true power to apparent power
Explanation: Power factor (PF) is the ratio of true power (watts) to apparent
power (volt-amperes). It ranges from 0 to 1, with 1 being unity power factor.
PF = cos θ, where θ is the phase angle between voltage and current.
, 4. In a series RLC circuit at resonance, which statement is true?
A) XL is greater than XC
B) XC is greater than XL
C) XL equals XC
D) XL and XC are both zero
Answer: C) XL equals XC
Explanation: At resonance in a series RLC circuit, inductive reactance (XL)
equals capacitive reactance (XC). This results in minimum impedance and
maximum current for the applied voltage.
5. The reactive power in an AC circuit is measured in:
A) Watts
B) Volt-amperes (VA)
C) Volt-amperes reactive (VAR)
D) Joules
Answer: C) Volt-amperes reactive (VAR)
Explanation: Reactive power is the power stored and released by inductors and
capacitors in an AC circuit. It is measured in VAR (volt-amperes reactive)
and does not perform useful work.
6. What is the RMS voltage equivalent of a 170 V peak AC sine wave?
A) 120 V
B) 170 V
C) 240 V
MAINTENANCE EXAM (OLD VERSION)
MASTER ELECTRICIAN 07 – NONRESIDENTIAL
MAINTENANCE CERTIFICATION EXAMINATION
================================================================================
EXAM OVERVIEW & INSTRUCTIONS
Exam Information:
- Exam Title: Washington Master Electrician 07 Nonresidential Maintenance (Old
Version)
- License Type: Master Specialty Electrician – 07 Nonresidential Maintenance
- Total Questions: This practice exam contains 250 questions
- Question Types: Multiple choice, true/false, and fill-in-the-blank
- Time Allowed: 4 hours (240 minutes)
- Passing Score: 75% (188 correct out of 250)
- Open Book: NEC Code Book and Washington Amendments permitted
- Exam Provider: Washington State Department of Labor & Industries – Electrical
Program
Content Areas Covered:
1. Electrical Theory (Questions 1-30)
2. National Electrical Code – General Requirements (Questions 31-55)
3. Branch Circuits and Feeders (Questions 56-75)
4. Overcurrent Protection (Questions 76-100)
5. Grounding and Bonding (Questions 101-125)
,6. Wiring Methods and Materials (Questions 126-150)
7. Motors, HVAC, Generators, and Transformers (Questions 151-175)
8. Hazardous (Classified) Locations (Questions 176-190)
9. Special Occupancies and Equipment (Questions 191-205)
10. Emergency and Standby Systems (Questions 206-215)
11. Washington‑Specific Code Amendments (RCW & WAC) (Questions 216-235)
12. Electrical Safety – Lockout/Tagout, PPE, Maintenance (Questions 236-250)
Instructions:
- Select the single best answer for each question
- Correct answers are indicated in BOLD
- Detailed rationales are provided for each answer
- Use the NEC Code Book and Washington amendments as references
- Mark your answers on a separate answer sheet
================================================================================
SECTION 1: ELECTRICAL THEORY (Questions 1-30)
1. The opposition to the flow of alternating current (AC) in a circuit, combining
resistance, inductive reactance, and capacitive reactance, is called:
A) Conductance
B) Impedance
C) Admittance
D) Susceptance
Answer: B) Impedance
,Explanation: Impedance (Z) is the total opposition to current flow in an AC
circuit. It is the vector sum of resistance (R), inductive reactance (XL), and
capacitive reactance (XC). Impedance is measured in ohms.[reference:0]
2. In a purely resistive AC circuit, the current and voltage are:
A) 90 degrees out of phase
B) 180 degrees out of phase
C) In phase
D) 45 degrees out of phase
Answer: C) In phase
Explanation: In a purely resistive circuit, voltage and current are in phase
with each other, meaning they reach their maximum and minimum values at the
same time.
3. The power factor of an AC circuit is defined as:
A) The ratio of apparent power to true power
B) The ratio of true power to apparent power
C) The product of voltage and current
D) The reciprocal of impedance
Answer: B) The ratio of true power to apparent power
Explanation: Power factor (PF) is the ratio of true power (watts) to apparent
power (volt-amperes). It ranges from 0 to 1, with 1 being unity power factor.
PF = cos θ, where θ is the phase angle between voltage and current.
, 4. In a series RLC circuit at resonance, which statement is true?
A) XL is greater than XC
B) XC is greater than XL
C) XL equals XC
D) XL and XC are both zero
Answer: C) XL equals XC
Explanation: At resonance in a series RLC circuit, inductive reactance (XL)
equals capacitive reactance (XC). This results in minimum impedance and
maximum current for the applied voltage.
5. The reactive power in an AC circuit is measured in:
A) Watts
B) Volt-amperes (VA)
C) Volt-amperes reactive (VAR)
D) Joules
Answer: C) Volt-amperes reactive (VAR)
Explanation: Reactive power is the power stored and released by inductors and
capacitors in an AC circuit. It is measured in VAR (volt-amperes reactive)
and does not perform useful work.
6. What is the RMS voltage equivalent of a 170 V peak AC sine wave?
A) 120 V
B) 170 V
C) 240 V
