Electrical Industry
Minimum standards for apprenticeship training programs are established by ______________?
Department of Labor (DOL)
The primary mission of OSHA is to ____________?
Ensure that employers maintain a safe workplace.
An insulator has _________ or more valence electrons?
5
In a series circuit, the current is _________ at all points.
The same
What year was the first NEC drafted?
1881
The ________ sets the minimum standards for the safe installation of electrical systems?
National Electrical Code (NEC)
A current of only ________ can cause death.
50 mA (milliamps)
Can cause extreme pain, muscle contractions, inability to breathe.
Resistance goes ___________ as the wire size goes up?
Down
Who stated that the total current entering a point must equal the total current leaving that point?
Kirchhoff
In what article can you find information about grounding and bonding?
Article 250
Maritime electricians must follow the National Electrical Code?
False
What are the 3 types of burns that result from electrical accidents?
1. Electrical Burns
2. Arc Burns
3. Thermal Contact Burns
An electrical circuit contains, at minimum, __________?
1. Voltage Source
2. Load
3. Conductors
Kirchhoff stated that the sum of all the voltage drops in a circuit is equal to ____________?
The source voltage of the circuit
The length of the cord for an in-sink waste disposer shall not be less than ________ inches and not over ________ inches?
18 inches
36 inches
A DOL apprenticeship requires how many hours of classroom instruction per year?
144 hours per year
Rubber protective equipment with an orange tag is rated for _____________?
36,000 VAC
54,000 VDC
Pole or pad-mounted transformers step the voltage ___________ for use in homes and businesses?
Down
Find the total resistance in a series circuit with three resistances of 10 ohms, 20 ohms, and 30 ohms.
60 ohms
Rtotal= 10 + 20 + 30
Receptacle outlets shall be located on or above, but not more than __________ inches above, the countertop or work surface.
20 inches
Employers with more than _________ employees must keep records of work-related injuries and illnesses?
10
It is safe to assume that asbestos may be found in any facility constructed before ____________?
1980
Banned in 1978
1 horsepower = ________ watts?
746
1 horsepower= 746 watts
Find the total resistance of a 4 ohm resistor, a 5 ohm resistor, and a 20 ohm resistor connected in parallel.
R total= 2 Ohms
Notice that the total resistance is less than either of the individual resistors.
What is the ampacity of a #12 AWG THWN copper conductor in free air?
Hint: Article 310
35 Amps