Technician A says a diode allows current to flow in only one direction. Technician B says transistors are semiconductor switching devices. Who is correct?
A. A only
B. B only
C. both A and B
D. neither A nor B
Answer: C
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A species that is ____________________ eats only plants
Fill in the blank(s) with correct word
The AFCI contains a ____ that is connected to the neutral bus bar in the panel box.
a. gold screw b. white pig tail c. silver screw d. brass screw
Which of the following is the minimum-size bonding jumper to metal water piping systems in a multi-occupancy building in which the water piping of each unit is isolated from the others? The 400 A building service is supplied by 500 kcmil service- entrance conductors and each occupancy is supplied by a 100 ampere feeder.
A. 3/0 AWG copper B. 1/0 AWG copper C. 3 AWG copper D. 8 AWG copper
How many square feet is in one square of roof material?
A) 150 B) 33 C) 50 D) 100