CSLB C10 Test 1 Questions with 100%
Correct Answers 2026 Latest Update
|Instant Download PDF
What is the minimum working clearance from an electrical panel under 600 V?
36"
Voltage drop in wire is a function of:
Wire gauge, Length of wire, Current flow in the wire
A 12-volt direct current, 13-watt fluorescent light is controlled by a photocell. The
average daily on-time is 12 hours per day. How many watt-hours are consumed
by the light on an average day?
156
Where may you use nonmetallic-sheathed cable?
inside floors and walls
What is the maximum permitted distance between convenience outlets in
kitchens?
12'
The minimum permitted size fixture wire is:
No. 18
What is an Erickson coupling used for?
to connect two sections of rigid conduit when one section cannot be turned
The smallest size grounding conductor permitted for service entrance is:
No. 8 copper
For an electric appliance with a 17.5 A load, the overcurrent device must not
exceed:
25 amps
A 5 kW appliance is used for 5 hours. At $0.014 per kWh, the cost of running the
appliance is:
$0.35
If the plumber accidentally cuts installed wires, to whom should you report the
problem?
general contractor
What is the maximum distance to an outlet from any point along the wall behind a
kitchen counter?
24"
Which of the following materials is not corrosive?
enamel
65 street lights are fed by a 2275-volt series circuit. What is the voltage across
each light?
35 V
What do you not take into consideration when doing load demand calculations?
small portable heating and cooling appliances
, The symbol represents a:
relay coil
A fixture that weighs more than ______ must be supported independently of an
outlet box.
50 lb.
After installing a new A/C how would you test it?
turn on the breaker and check voltage
The symptoms of shock are:
pale skin; sweaty; fast pulse
Of the following subtrades, which one must yield in the case of a dispute?
concrete
The following should not be used on a live circuit:
ohmmeter
Which of the following applies to solar panels, metal frames, and metal mounting
equipment on a roof-mounted PV system?
They must be bonded and grounded.
With what should you treat a burn at a jobsite?
loose bandage only
What type of insulation is needed underground?
THW
One million watts equal one:
megawatt
The maximum voltage for a plug fuse is
125 V
What is a troffer fixture?
A recessed lighting fixture in a suspended ceiling system
When flexibility is not required, AC cable should be stapled or strapped _____
from a box.
1'
A house is approximately 2300 sq ft and has all-electric major and minor
appliances (e.g., washer, dryer, furnace, and A/C). The ground conductor for the
above system is at least:
No. 8
Service drops over public streets, sidewalks, and commercial areas subject to
truck traffic must have a minimum clearance of _____ from final grade.
18'
What is the minimum number of receptacles required at each patient bed location
in critical care areas of healthcare facilities?
fourteen
The instrument that tests the resistance of wire insulation is a(n):
Megger
In the figure shown, the symbol between A and B represents a:
transformer winding
The lead wire on a heating cable is red. This indicates:
240 V
The minimum size wire that can be used for a 9kW range is:
Correct Answers 2026 Latest Update
|Instant Download PDF
What is the minimum working clearance from an electrical panel under 600 V?
36"
Voltage drop in wire is a function of:
Wire gauge, Length of wire, Current flow in the wire
A 12-volt direct current, 13-watt fluorescent light is controlled by a photocell. The
average daily on-time is 12 hours per day. How many watt-hours are consumed
by the light on an average day?
156
Where may you use nonmetallic-sheathed cable?
inside floors and walls
What is the maximum permitted distance between convenience outlets in
kitchens?
12'
The minimum permitted size fixture wire is:
No. 18
What is an Erickson coupling used for?
to connect two sections of rigid conduit when one section cannot be turned
The smallest size grounding conductor permitted for service entrance is:
No. 8 copper
For an electric appliance with a 17.5 A load, the overcurrent device must not
exceed:
25 amps
A 5 kW appliance is used for 5 hours. At $0.014 per kWh, the cost of running the
appliance is:
$0.35
If the plumber accidentally cuts installed wires, to whom should you report the
problem?
general contractor
What is the maximum distance to an outlet from any point along the wall behind a
kitchen counter?
24"
Which of the following materials is not corrosive?
enamel
65 street lights are fed by a 2275-volt series circuit. What is the voltage across
each light?
35 V
What do you not take into consideration when doing load demand calculations?
small portable heating and cooling appliances
, The symbol represents a:
relay coil
A fixture that weighs more than ______ must be supported independently of an
outlet box.
50 lb.
After installing a new A/C how would you test it?
turn on the breaker and check voltage
The symptoms of shock are:
pale skin; sweaty; fast pulse
Of the following subtrades, which one must yield in the case of a dispute?
concrete
The following should not be used on a live circuit:
ohmmeter
Which of the following applies to solar panels, metal frames, and metal mounting
equipment on a roof-mounted PV system?
They must be bonded and grounded.
With what should you treat a burn at a jobsite?
loose bandage only
What type of insulation is needed underground?
THW
One million watts equal one:
megawatt
The maximum voltage for a plug fuse is
125 V
What is a troffer fixture?
A recessed lighting fixture in a suspended ceiling system
When flexibility is not required, AC cable should be stapled or strapped _____
from a box.
1'
A house is approximately 2300 sq ft and has all-electric major and minor
appliances (e.g., washer, dryer, furnace, and A/C). The ground conductor for the
above system is at least:
No. 8
Service drops over public streets, sidewalks, and commercial areas subject to
truck traffic must have a minimum clearance of _____ from final grade.
18'
What is the minimum number of receptacles required at each patient bed location
in critical care areas of healthcare facilities?
fourteen
The instrument that tests the resistance of wire insulation is a(n):
Megger
In the figure shown, the symbol between A and B represents a:
transformer winding
The lead wire on a heating cable is red. This indicates:
240 V
The minimum size wire that can be used for a 9kW range is:
