Assignment: Getting Started as an Electrician
1. Which of the following formulas would you use to calculate the power requirements of an electrical load?
A. P = I × R
B. P = E × I
C. P = E/R
D. P = E/I
2. Electrical pressure is also called
A. voltage.
B. conductance.
C. resistance.
D. amperage.
3. Which of the following wire gage sizes is the thickest?
A. 0
B. 14
C. 8
D. 10
4. The service drop for a residence is connected to the utility company's ________ voltage.
A. subtransmission
B. primary
C. secondary
D. transmission
5. Electricity produces work when the electrons in a conductor
A. stay negative.
B. are placed in motion.
C. stop all movement.
D. become positive.
6. A home electrical system is joined to the electric company's system at the junction of the
A. black and red wires in the meter.
B. neutral strip in the panelboard.
C. panelboard and service drop.
D. service entrance head and service drop.
7. How many outlets are allowed on a 240 V branch circuit?
A. 1
B. 9
C. 3
D. 6
8. The hot wires in a service entrance panel are most likely to be covered with ________ insulation.
A. red
B. white
C. green
D. gray
9. Which of the following electrical characteristics remains the same during normal residential electrical use?
A. The meter reading
B. The current flow
C. The wattage consumption
D. The voltage level
10. The electric meter for a new house is furnished by the
A. contractor.
B. electrician.
C. electric company.
D. homeowner.
11. The electrician's main source of information about electrical installation rules and regulations is the
A. National Electrical Code.
B. State Safety Code.
C. Occupational Safety and Health Act.
D. National Electrical Safety Code.
12. A small-appliance circuit will be protected by a circuit breaker rated at
A. 30 A.
B. 20 A.
C. 15 A.
D. 50 A.
13. An underground electrical distribution system would most likely be found
A. in a rural area.
B. in a downtown urban area.
C. under a river.
D. under a moist tract of farmland.
14. A 120 V general-purpose circuit should have circuit breakers or fuses with values of
A. 120/240 A.
B. 100 A.
C. 15 A or 20 A.
D. 50 A.
15. The main disconnect in a service panel is a(n)
A. bus bar.
B. receptacle.
C. circuit breaker.
D. ammeter.