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CSLB C10 Test 1 Already Passed
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
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
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.
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.
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:
No. 8 copper
What do you fill a conduit with to prevent gas from escaping?
sealing compound
What is the maximum amperage No. 10 THW can carry?
30 amps
When 4, 1.5 volt batteries are wired in a series what is the resulting voltage?
6 volts
A 110 W lamp is connected to a 220 V line. What is the resistance?
440 ohms
yellow
Solve for "I" (current) given the information in the transformer drawing.
200 amps
If an electrical sub-contractor finds a conflict in the plans who should he/she contact?
prime contractor
_____ size screws are required for mounting light fixtures.
No. 8-
The demand factor of a fixed electric space heater is 65%. A central air-conditioning unit in the house has a demand factor of 100%. The air-conditioner also acts as a heat pump. What percent should be added to the heating circuit (i.e., space heater)?
Portable power tools at a job site require:
a GFCI
What is the power rating, in kW, of a three-phase transformer that supplies 480 V at 60 A with a power factor of 90%?
45 kW- VA 1.732 (root of 3)/ 1000
Bending conduit is best done with a:
field hickey
The smallest conductor permitted for general wiring is No. ______ copper or No. ______ aluminum.
One mil equals _____ in thickness.
The safe-distance requirement from overhead electrical lines energized between 600 V and 50,000 V is _____ for boom-type lifting and hoisting equipment when not in use.
What is required when employees are working on energized equipment?
personal protection
If a co-worker falls down and suffers a deep, bleeding gash to the head, you should:
clamp-on ammeter
The general lighting load in dwellings is based upon ______ per square foot.
3 watts
Which of the following has the least effect on transformer performance?
eddy currents
For how much of the normal ampacity must branch circuit conductors supplying continuous loads be sized?
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?
