A direct-fired make-up air unit typically achieves a combustion efficiency of _____
a. 70 percent
b. 80 percent
c. 90 percent
d. 100 percent
d
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The term ____________________ is commonly used by manufacturers to indicate the surface area of the water remaining in the bowl once the flush is completed.
Fill in the blank(s) with the appropriate word(s).
The advantage of compliance in a scroll compressor is that:
A) The orbiting scroll can separate and unload to pass a small liquid slug. B) The compressor is very flexible in its application. C) The compressor complies with all national compressor standards. D) The top of the compressor can be rotated 180° to comply with many refrigerant piping arrangements.
Which method is most accurate for checking for "soft foot"?
A. dial indicator. B. straight edge. C. massage. D. rocking.
What is the e-e of pipe L?
Fill in the blank(s) with the appropriate word(s).