Which system protects the stairway enclosure and provides a means of smoke ventilation before the smoke enters the stair enclosure?
A. Pressurized stairwells
B. Single-injection systems
C. Active smoke proof enclosures
D. Passive smoke proof enclosures
Ans: D. Passive smoke proof enclosures
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Identify the major components of a kettle reboiler.
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Suppose arc ABC = 90o and the radius is 4.2 inches. What is the length of arc ABC to the nearest tenth of an inch?
A. 6.4 B. 6.5 C. 6.6 D. 6.7
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Wobble plate compressors commonly use how many cylinders?
A) Two B) Three C) Four D) Five of seven
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Any of these could cause high starter current draw EXCEPT:
a. worn starter bushings b. a failed starter relay c. grounded field coils d. a seized A/C compressor
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