NFPA 70B Electrical Equipment Maintenance
Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
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1. What is the primary purpose of NFPA 70B?
A. To establish installation requirements for electrical systems
B. To provide recommended practices for maintaining electrical
equipment
C. To regulate electrical worker licensing
D. To define building occupancy classifications
Answer: B
NFPA 70B focuses on preventive and predictive maintenance
practices to reduce electrical failures, improve reliability, and
enhance safety, rather than installation or licensing requirements.
2. Which type of maintenance is performed at regular,
predetermined intervals regardless of equipment condition?
A. Predictive maintenance
B. Preventive maintenance
, C. Corrective maintenance
D. Condition-based maintenance
Answer: B
Preventive maintenance is scheduled based on time or usage
intervals and aims to prevent failures before they occur.
3. Predictive maintenance is best described as maintenance based
on:
A. Manufacturer warranties
B. Equipment age only
C. Measured equipment condition and performance trends
D. Emergency failures
Answer: C
Predictive maintenance relies on data such as temperature,
vibration, and insulation resistance to anticipate failures before
they happen.
4. Which document should define maintenance intervals, tasks, and
responsibilities for electrical equipment?
A. One-line diagram
B. Electrical safety program
C. Electrical equipment maintenance program (EEMP)
D. Job hazard analysis
, Answer: C
NFPA 70B emphasizes the development of an Electrical Equipment
Maintenance Program to ensure consistent, documented
maintenance practices.
5. What is the primary risk of inadequate electrical equipment
maintenance?
A. Increased installation cost
B. Reduced system voltage
C. Increased likelihood of electrical fires and failures
D. Excessive documentation
Answer: C
Poor maintenance can lead to insulation breakdown, overheating,
arcing, and ultimately fires or system failures.
6. Which factor most directly influences the frequency of
maintenance activities?
A. Equipment color
B. Environmental conditions
C. Building occupancy type only
D. Utility ownership
Answer: B
Harsh environments such as high humidity, dust, or corrosive
, atmospheres accelerate equipment deterioration and require
more frequent maintenance.
7. Which piece of equipment typically requires routine infrared
thermographic inspection?
A. Conduit bodies
B. Switchgear and panelboards
C. Nonmetallic cable jackets
D. Ground rods
Answer: B
Infrared inspections identify abnormal heating in switchgear,
panelboards, and connections, indicating loose or overloaded
components.
8. Why is documentation critical in an electrical maintenance
program?
A. It replaces hands-on inspections
B. It ensures compliance tracking and trend analysis
C. It reduces the need for qualified personnel
D. It eliminates testing requirements
Answer: B
Accurate records allow maintenance history review, identification
of recurring problems, and demonstration of due diligence.
Questions And Correct Answers (Verified
Answers) Plus Rationales 2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of NFPA 70B?
A. To establish installation requirements for electrical systems
B. To provide recommended practices for maintaining electrical
equipment
C. To regulate electrical worker licensing
D. To define building occupancy classifications
Answer: B
NFPA 70B focuses on preventive and predictive maintenance
practices to reduce electrical failures, improve reliability, and
enhance safety, rather than installation or licensing requirements.
2. Which type of maintenance is performed at regular,
predetermined intervals regardless of equipment condition?
A. Predictive maintenance
B. Preventive maintenance
, C. Corrective maintenance
D. Condition-based maintenance
Answer: B
Preventive maintenance is scheduled based on time or usage
intervals and aims to prevent failures before they occur.
3. Predictive maintenance is best described as maintenance based
on:
A. Manufacturer warranties
B. Equipment age only
C. Measured equipment condition and performance trends
D. Emergency failures
Answer: C
Predictive maintenance relies on data such as temperature,
vibration, and insulation resistance to anticipate failures before
they happen.
4. Which document should define maintenance intervals, tasks, and
responsibilities for electrical equipment?
A. One-line diagram
B. Electrical safety program
C. Electrical equipment maintenance program (EEMP)
D. Job hazard analysis
, Answer: C
NFPA 70B emphasizes the development of an Electrical Equipment
Maintenance Program to ensure consistent, documented
maintenance practices.
5. What is the primary risk of inadequate electrical equipment
maintenance?
A. Increased installation cost
B. Reduced system voltage
C. Increased likelihood of electrical fires and failures
D. Excessive documentation
Answer: C
Poor maintenance can lead to insulation breakdown, overheating,
arcing, and ultimately fires or system failures.
6. Which factor most directly influences the frequency of
maintenance activities?
A. Equipment color
B. Environmental conditions
C. Building occupancy type only
D. Utility ownership
Answer: B
Harsh environments such as high humidity, dust, or corrosive
, atmospheres accelerate equipment deterioration and require
more frequent maintenance.
7. Which piece of equipment typically requires routine infrared
thermographic inspection?
A. Conduit bodies
B. Switchgear and panelboards
C. Nonmetallic cable jackets
D. Ground rods
Answer: B
Infrared inspections identify abnormal heating in switchgear,
panelboards, and connections, indicating loose or overloaded
components.
8. Why is documentation critical in an electrical maintenance
program?
A. It replaces hands-on inspections
B. It ensures compliance tracking and trend analysis
C. It reduces the need for qualified personnel
D. It eliminates testing requirements
Answer: B
Accurate records allow maintenance history review, identification
of recurring problems, and demonstration of due diligence.
