What type of gas is used to pressurize new ACR piping circuits for leak detection purposes?
A. oxygen
B. carbon dioxide
C. nitrogen
D. refrigerant
Answer: C
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Tied bundles of small grains are called ____________________, and tied bundles of corn are called ____________________
Fill in the blank(s) with correct word
Four types of group loop configurations are ____________________, ____________________, ____________________, and ____________________.
Fill in the blank(s) with the appropriate word(s).
Which switching device uses LEDs?
A) Hall effect B) Pickup coil C) Optical sensor D) Magnetic reluctor
"Breakdown voltage" is the voltage at which a Zener diode will do which of these?
A) Allow reverse current to flow B) Sustain damage as a result of current overload C) Stop the flow of reverse current D) Stop the flow of either forward or reverse current