Discuss the two basic approaches used for fire protection of steel.
What will be an ideal response?
See the Instructor's Manual (IM).
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Which statement about economizers installed with packaged units is correct?
a. All packaged units are equipped with economizers. b. Economizers require at least two compressors. c. Compressors run less with economizers installed. d. Economizers only function in the winter.
In a series RC circuit, if the time constant is small (but finite), the capacitor will charge
A. never (the capacitor never builds up a voltage) B. slowly C. instantaneously: in no time (i.e., it doesn't matter what the time constant is) D. quickly
How do technicians increase the blower speed in a belt-driven motor?
A) They loosen belt tension. B) They decrease pulley spread. C) They tighten belt tension. D) They increase the pulley spread.
The notch on acetylene fittings indicates left-hand threads
Indicate whether the statement is true or false