Electrical Inspecton/ Electrical {National Electrical
Code}
Competency Study Guide
Comprehensive Resource To Help You Ace 2026-2027
Exams Includes Frequently Tested Questions With
ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
1. Which of the following should the inspector be wearing while evaluating
electrical panels?
A. all of these
B. safety glasses
C. non-synthetic clothing
D. none of these
E. electrician's gloves - Correct Answer: A. all of these
2. Which of the following should be reported as a problem with an electrical
panel?
A. unlinked double-pole breakers
B. pigtails (two wires joined to a common breaker)
C. GFCI breakers
D. splices in the panel - Correct Answer: A. unlinked double-pole
breakers
3. A bonding connection ______________________ connect the grounding
bus to the electrical enclosure.
A. should
, B. should not - Correct Answer: A. should
4. Fused main disconnects are usually a maximum of _____.
A. 30 amps
B. 60 amps
C. 100 amps
D. 200 amps - Correct Answer: C. 100 amps
5. Screw-in fuses are more properly called _________.
A. Westinghouse fuses
B. Tessler-type fuses
C. Edison base fuses - Correct Answer: C. Edison base fuses
6. Upgrading to ___ fuses stops over-fusing.
A. A
B. S
C. P
D. F - Correct Answer: B. S
7. Which of the following statements is true about 240-volt breakers?
A. 240-volt breakers draw power from one bus bar.
B. 240-volt breakers are always 15- or 30- amps.
C. 240-volt breakers are connected to two separate bus bars in the
panel.
D. 240-volt breakers should always be located at the very top of the
panel. - Correct Answer: C. 240-volt breakers are connected to
two separate bus bars in the panel.
,8. GFCI breakers have _____ conductors.
A. one
B. two
C. zero
D. three - Correct Answer: B. two
9. The inspector will find overheating _____________ breakers.
A. with any type of defective
B. only with Sylvannia
C. only with Zinsco and FPE - Correct Answer: A. with any type of
defective
10.AFCI breakers made by ________ were subject to a recall notice.
A. Federal Pacific
B. Cutler-Hammer
C. Challenger
D. Square D - Correct Answer: D. Square D
11.Zinsco electrical panels are sometimes branded as ________.
A. Challenger
B. Sylvania
C. Federal Pacific - Correct Answer: B. Sylvania
12.Electric panel buses colored red, blue and black are indicative of a
_____________.
A. 120-volt only supply
B. 3-phase supply
C. 4-phase supply
D. 120/240-volt panels - Correct Answer: B. 3-phase supply
, 13.Zinsco electrical panels are problematic due to __________.
A. difficulty obtaining replacement breakers
B. loose breakers
C. poor connections to the bus
D. not enough amperage for modern needs - Correct Answer: C.
poor connections to the bus
14.Fused neutral circuits were common in the _________.
A. 1900s
B. 1890s
C. 1920s
D. 1910s - Correct Answer: C. 1920s
15.What color will plastic conduit be if it is for electrical use?
A. red-
B. gray
C. white - Correct Answer:
16.The inspector should not report all _______________ electrical splices as
improper.
A. dead front
B. neither
C. in-panel - Correct Answer: C. in-panel
17.Which of the following would the inspector require a specialist?
A. single-strand aluminum wiring
B. aluminum wiring
Code}
Competency Study Guide
Comprehensive Resource To Help You Ace 2026-2027
Exams Includes Frequently Tested Questions With
ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
1. Which of the following should the inspector be wearing while evaluating
electrical panels?
A. all of these
B. safety glasses
C. non-synthetic clothing
D. none of these
E. electrician's gloves - Correct Answer: A. all of these
2. Which of the following should be reported as a problem with an electrical
panel?
A. unlinked double-pole breakers
B. pigtails (two wires joined to a common breaker)
C. GFCI breakers
D. splices in the panel - Correct Answer: A. unlinked double-pole
breakers
3. A bonding connection ______________________ connect the grounding
bus to the electrical enclosure.
A. should
, B. should not - Correct Answer: A. should
4. Fused main disconnects are usually a maximum of _____.
A. 30 amps
B. 60 amps
C. 100 amps
D. 200 amps - Correct Answer: C. 100 amps
5. Screw-in fuses are more properly called _________.
A. Westinghouse fuses
B. Tessler-type fuses
C. Edison base fuses - Correct Answer: C. Edison base fuses
6. Upgrading to ___ fuses stops over-fusing.
A. A
B. S
C. P
D. F - Correct Answer: B. S
7. Which of the following statements is true about 240-volt breakers?
A. 240-volt breakers draw power from one bus bar.
B. 240-volt breakers are always 15- or 30- amps.
C. 240-volt breakers are connected to two separate bus bars in the
panel.
D. 240-volt breakers should always be located at the very top of the
panel. - Correct Answer: C. 240-volt breakers are connected to
two separate bus bars in the panel.
,8. GFCI breakers have _____ conductors.
A. one
B. two
C. zero
D. three - Correct Answer: B. two
9. The inspector will find overheating _____________ breakers.
A. with any type of defective
B. only with Sylvannia
C. only with Zinsco and FPE - Correct Answer: A. with any type of
defective
10.AFCI breakers made by ________ were subject to a recall notice.
A. Federal Pacific
B. Cutler-Hammer
C. Challenger
D. Square D - Correct Answer: D. Square D
11.Zinsco electrical panels are sometimes branded as ________.
A. Challenger
B. Sylvania
C. Federal Pacific - Correct Answer: B. Sylvania
12.Electric panel buses colored red, blue and black are indicative of a
_____________.
A. 120-volt only supply
B. 3-phase supply
C. 4-phase supply
D. 120/240-volt panels - Correct Answer: B. 3-phase supply
, 13.Zinsco electrical panels are problematic due to __________.
A. difficulty obtaining replacement breakers
B. loose breakers
C. poor connections to the bus
D. not enough amperage for modern needs - Correct Answer: C.
poor connections to the bus
14.Fused neutral circuits were common in the _________.
A. 1900s
B. 1890s
C. 1920s
D. 1910s - Correct Answer: C. 1920s
15.What color will plastic conduit be if it is for electrical use?
A. red-
B. gray
C. white - Correct Answer:
16.The inspector should not report all _______________ electrical splices as
improper.
A. dead front
B. neither
C. in-panel - Correct Answer: C. in-panel
17.Which of the following would the inspector require a specialist?
A. single-strand aluminum wiring
B. aluminum wiring
