California CSLB C-10 Planning & Estimating
Questions and Answers 2026 Exam Prep
1. An electric stove is rated at 4,000 watts (P) and is con- 14.4 Ohms
nected to a 240-volt (E) circuit. What is the resistance
(R) of the heating elements?
P/E = I
R = E/I
2. Refer to the Electric blueprint. How many surface 7
mounted light fixtures are depicted on the first floor
of the house?
3. Which of the following materials is used to fasten con- Conduit straps
duit to walls or other surfaces?
4. What does the newer 2022 California Electrical Code Receptacles not serving
language clarify with regards to bathrooms? the countertop can be 15-
or 20-amp
5. If 1,600 watthours were consumed over a period of 8 0.2kW
hours, then how many kilowatts were used every hour?
6. What's the maximum amount of bends for a run of 360 deg
metal conduit?
7. Motors that have 10 horsepower or more are typically: Three-phase
8. Refer to the diagram. Identify the component in the Photovoltaic cell
photovoltaic system.
9. Aside from plot, architectural and e-Sheets, what por- Mechanical
tion of the plans are most important to look over thor-
oughly?
, California CSLB C-10 Planning & Estimating
Questions and Answers 2026 Exam Prep
10. Which of the following tools does NOT belong in an None of the above
electrician's toolbox?
11. Refer to the blueprint. The 2 story house has a total of 2
Carbon Monoxide detectors.
12. What is the typical operating frequency of alternating 60 Hz
current?
13. A kitchen circuit feeds a total of 8 outlets, if the con- 20 Amps
tractor uses 12 AWG wire, what size circuit breaker will
he install?
14. What do you use to secure the service entrance wires Lug terminal
to the main breaker inside of a panel?
15. What tool measures the specific gravity (SP) of the Hydrometer
electrolyte in a flooded battery?
16. What is the minimum horizontal separation between 24 inches
two outlets located on the opposite sides of a fire-re-
sistance-rated wall assembly?
17. Refer to the 1st floor Electric blueprint. How many GFCI 11
receptacles are found on this floor level?
18. If you have to install a ground rod in rocky soil what is Lay ground rod horizontal
acceptable? 30" deep
NEC 250.53(G)
19. Refer to the 2nd floor Electric blueprint. How many 14
AFI receptacles are found on this floor level? Exclude
standard duplex and GFCIs.
Questions and Answers 2026 Exam Prep
1. An electric stove is rated at 4,000 watts (P) and is con- 14.4 Ohms
nected to a 240-volt (E) circuit. What is the resistance
(R) of the heating elements?
P/E = I
R = E/I
2. Refer to the Electric blueprint. How many surface 7
mounted light fixtures are depicted on the first floor
of the house?
3. Which of the following materials is used to fasten con- Conduit straps
duit to walls or other surfaces?
4. What does the newer 2022 California Electrical Code Receptacles not serving
language clarify with regards to bathrooms? the countertop can be 15-
or 20-amp
5. If 1,600 watthours were consumed over a period of 8 0.2kW
hours, then how many kilowatts were used every hour?
6. What's the maximum amount of bends for a run of 360 deg
metal conduit?
7. Motors that have 10 horsepower or more are typically: Three-phase
8. Refer to the diagram. Identify the component in the Photovoltaic cell
photovoltaic system.
9. Aside from plot, architectural and e-Sheets, what por- Mechanical
tion of the plans are most important to look over thor-
oughly?
, California CSLB C-10 Planning & Estimating
Questions and Answers 2026 Exam Prep
10. Which of the following tools does NOT belong in an None of the above
electrician's toolbox?
11. Refer to the blueprint. The 2 story house has a total of 2
Carbon Monoxide detectors.
12. What is the typical operating frequency of alternating 60 Hz
current?
13. A kitchen circuit feeds a total of 8 outlets, if the con- 20 Amps
tractor uses 12 AWG wire, what size circuit breaker will
he install?
14. What do you use to secure the service entrance wires Lug terminal
to the main breaker inside of a panel?
15. What tool measures the specific gravity (SP) of the Hydrometer
electrolyte in a flooded battery?
16. What is the minimum horizontal separation between 24 inches
two outlets located on the opposite sides of a fire-re-
sistance-rated wall assembly?
17. Refer to the 1st floor Electric blueprint. How many GFCI 11
receptacles are found on this floor level?
18. If you have to install a ground rod in rocky soil what is Lay ground rod horizontal
acceptable? 30" deep
NEC 250.53(G)
19. Refer to the 2nd floor Electric blueprint. How many 14
AFI receptacles are found on this floor level? Exclude
standard duplex and GFCIs.
