CSLB C10 TEST 1 (ACTUAL 2024-2025)
QUESTIONS WITH ANSWERS
Service entrance equipment panels require bonding jumpers:
with punched concentric or eccentric knockouts
Which of the following may not be threaded in the field?
EMT
What is the minimum clear working space in front of a 480 V
panel opposite a grounded wall?
42"
How many No. 12 conductors should there be in a 4-11/16"
box with 42 cu in?
, CSLB C10 TEST 1 (ACTUAL 2024-2025)
QUESTIONS WITH ANSWERS
18
What is the amperage rating of No. 1 aluminum THW?
100 amps
A contractor discovers a serious code violation on an
approved set of plans.
The work must stop until the contractor reports the violation
and has the plans corrected.
Which of the following is the largest wire?
4/0
, CSLB C10 TEST 1 (ACTUAL 2024-2025)
QUESTIONS WITH ANSWERS
How would you use Ohm's law formula to find resistance?
R = E ÷ I Resistance=volts/amperes
Cal/OSHA requires guardrails for scaffolds over _____ in
height.
7-½'
How many 1250-watt appliances can be used on a 50-amp,
120-volt branch circuit?
50 A x 120 V = 6000 W 6000 W ÷ 1250 W = 4.8 (4
appliances)
Overhead community antenna system coaxial lines are not
permitted at a height of less than _____ above swimming
pools or towers.
, CSLB C10 TEST 1 (ACTUAL 2024-2025)
QUESTIONS WITH ANSWERS
10'
The smallest size wire permitted for general wiring is:
No. 14
What type of voltage do you need in a building (small
complex of 100,000 sq ft) that has business machines,
computers, programmers, etc.?
110/208 V
What is the minimum working clearance from an electrical
panel under 600 V?
36"
Voltage drop in wire is a function of:
QUESTIONS WITH ANSWERS
Service entrance equipment panels require bonding jumpers:
with punched concentric or eccentric knockouts
Which of the following may not be threaded in the field?
EMT
What is the minimum clear working space in front of a 480 V
panel opposite a grounded wall?
42"
How many No. 12 conductors should there be in a 4-11/16"
box with 42 cu in?
, CSLB C10 TEST 1 (ACTUAL 2024-2025)
QUESTIONS WITH ANSWERS
18
What is the amperage rating of No. 1 aluminum THW?
100 amps
A contractor discovers a serious code violation on an
approved set of plans.
The work must stop until the contractor reports the violation
and has the plans corrected.
Which of the following is the largest wire?
4/0
, CSLB C10 TEST 1 (ACTUAL 2024-2025)
QUESTIONS WITH ANSWERS
How would you use Ohm's law formula to find resistance?
R = E ÷ I Resistance=volts/amperes
Cal/OSHA requires guardrails for scaffolds over _____ in
height.
7-½'
How many 1250-watt appliances can be used on a 50-amp,
120-volt branch circuit?
50 A x 120 V = 6000 W 6000 W ÷ 1250 W = 4.8 (4
appliances)
Overhead community antenna system coaxial lines are not
permitted at a height of less than _____ above swimming
pools or towers.
, CSLB C10 TEST 1 (ACTUAL 2024-2025)
QUESTIONS WITH ANSWERS
10'
The smallest size wire permitted for general wiring is:
No. 14
What type of voltage do you need in a building (small
complex of 100,000 sq ft) that has business machines,
computers, programmers, etc.?
110/208 V
What is the minimum working clearance from an electrical
panel under 600 V?
36"
Voltage drop in wire is a function of:
