• California CSLB
C10 Electrical 09/11/2026
Exam
CSLB C10 Test 4 | 120 Questions and Answers
() (Verified Answers) COMPLETE
FREQUENTLY MOST TESTED QUESTIONS WITH
COMPLETE SOLUTION /GET IT 100%
ACCURATE!(Graded A+)
Which of the following anchors may not be used to secure electrical equipment to masonry walls?
A
Lead anchors approved for the weight of the equipment
B
Toggle bolts
C
P 1
, • California CSLB
C10 Electrical 09/11/2026
Exam
Threaded studs u201cshotu201d into the masonry
D
Wooden plugs driven into holes in the masonry for holding wood screws - Correct Answer :The Correct Answer
Is D
NEC Section 110.13(A).
A device designed to open and close a circuit by nonautomatic means and to open the circuit automatically on a
predetermined overcurrent without damage to itself when properly applied within its rating is called a:
A
Nonfusible disconnect switch
B
Time-delay fuse
C
Circuit breaker
D
Motor running overcurrent protector - Correct Answer :The Correct Answer Is C
NEC Article 100 - Definitions.
A conductor encased within material of composition or thickness that is recognized by the NEC as electrical
insulation is known as a:
A
Bare conductor
B
Covered conductor
C
Concealed conductor
D
P 2
, • California CSLB
C10 Electrical 09/11/2026
Exam
Insulated conductor - Correct Answer :he Correct Answer Is D
NEC Article 100 - Definitions, Conductor, Insulated.
A separate portion of a conduit or tubing system that provides access through a removable cover(s) to the
interior of the system at a junction of two or more sections of the system or at a terminal point of the system is
defined as a:
A
Conduit body
B
Conduit junction
C
Conduit intersection
D
Conduit T-connector - Correct Answer :A
Conduit body
Which of the following describes cleaning and lubricating compounds that can cause severe damage to many
plastic insulating materials?
A
Deteriorating agents
B
Cooling agents
C
Splicing agents
D
Heating agents - Correct Answer :The Correct Answer Is A
P 3
, • California CSLB
C10 Electrical 09/11/2026
Exam
NEC Section 110.11 deals with deteriorating agents, stating that some cleaning and lubricating compounds can
cause severe deterioration of many plastic materials used for insulating and structural applications in equipment.
Which circuits must not be connected to any system containing trolley wires with a ground return?
A
Ground wires
B
Grounding conductors
C
Circuits for lighting and power
D
Ungrounded trolley wires - Correct Answer :The Correct Answer Is C
No other live or ungrounded conductors may be connected except those specifically designed for trolley
operation. NEC Section 110.19.
The minimum headroom of working spaces about service equipment, switchboards, panelboards, or motor
control centers shall be at least:
A
6 1/2 feet
B
8 feet
C
5.75 feet
D
10 feet - Correct Answer :The Correct Answer Is A
The NEC judges 6 1/2 feet working space to be adequate above service equipment to provide room for an
electrician to service the equipment. This measurement is taken from the floor to ceiling of, say, an electrical
P 4
C10 Electrical 09/11/2026
Exam
CSLB C10 Test 4 | 120 Questions and Answers
() (Verified Answers) COMPLETE
FREQUENTLY MOST TESTED QUESTIONS WITH
COMPLETE SOLUTION /GET IT 100%
ACCURATE!(Graded A+)
Which of the following anchors may not be used to secure electrical equipment to masonry walls?
A
Lead anchors approved for the weight of the equipment
B
Toggle bolts
C
P 1
, • California CSLB
C10 Electrical 09/11/2026
Exam
Threaded studs u201cshotu201d into the masonry
D
Wooden plugs driven into holes in the masonry for holding wood screws - Correct Answer :The Correct Answer
Is D
NEC Section 110.13(A).
A device designed to open and close a circuit by nonautomatic means and to open the circuit automatically on a
predetermined overcurrent without damage to itself when properly applied within its rating is called a:
A
Nonfusible disconnect switch
B
Time-delay fuse
C
Circuit breaker
D
Motor running overcurrent protector - Correct Answer :The Correct Answer Is C
NEC Article 100 - Definitions.
A conductor encased within material of composition or thickness that is recognized by the NEC as electrical
insulation is known as a:
A
Bare conductor
B
Covered conductor
C
Concealed conductor
D
P 2
, • California CSLB
C10 Electrical 09/11/2026
Exam
Insulated conductor - Correct Answer :he Correct Answer Is D
NEC Article 100 - Definitions, Conductor, Insulated.
A separate portion of a conduit or tubing system that provides access through a removable cover(s) to the
interior of the system at a junction of two or more sections of the system or at a terminal point of the system is
defined as a:
A
Conduit body
B
Conduit junction
C
Conduit intersection
D
Conduit T-connector - Correct Answer :A
Conduit body
Which of the following describes cleaning and lubricating compounds that can cause severe damage to many
plastic insulating materials?
A
Deteriorating agents
B
Cooling agents
C
Splicing agents
D
Heating agents - Correct Answer :The Correct Answer Is A
P 3
, • California CSLB
C10 Electrical 09/11/2026
Exam
NEC Section 110.11 deals with deteriorating agents, stating that some cleaning and lubricating compounds can
cause severe deterioration of many plastic materials used for insulating and structural applications in equipment.
Which circuits must not be connected to any system containing trolley wires with a ground return?
A
Ground wires
B
Grounding conductors
C
Circuits for lighting and power
D
Ungrounded trolley wires - Correct Answer :The Correct Answer Is C
No other live or ungrounded conductors may be connected except those specifically designed for trolley
operation. NEC Section 110.19.
The minimum headroom of working spaces about service equipment, switchboards, panelboards, or motor
control centers shall be at least:
A
6 1/2 feet
B
8 feet
C
5.75 feet
D
10 feet - Correct Answer :The Correct Answer Is A
The NEC judges 6 1/2 feet working space to be adequate above service equipment to provide room for an
electrician to service the equipment. This measurement is taken from the floor to ceiling of, say, an electrical
P 4
