Which of these terms refers to a cone-bearing tree?
a. Hardwood c. Confier
b. Heartwood d. Xylem
C
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One method of providing plugging control is with the use of an automatic timed circuit.
Answer the following statement true (T) or false (F)
Canvas collars are generally made of canvas rather than other materials such as rubber.
Answer the following statement true (T) or false (F)
When an arc occurs, explosive expansion causes molten metal to be thrown through the air and onto the skin or into the eyes of an electrical worker. The high pressure that results from a/an ____________________ can rupture eardrums and knock people off ladders and scaffolding.
Fill in the blank(s) with the appropriate word(s).
The forward bias voltage required for an LED is ________
A) 1.5 to 2.2 volts B) 0.3 to .05 volt C) 4.5 to 5.1 volts D) 0.5 to 0.7 volt