Technician A says all pressure differential valves must be manually recentered after bleeding. Technician B says a recentering spring is used on some pressure differential valves. Who is correct?
A. A only
B. B only
C. Both A and B
D. Neither A nor B
Answer: B
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For ceiling joists the live load is only ____ psf.
A. 3 B. 5 C. 10 D. 13
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On overhead cam engines, the part that rides on the cam lobe is called a(n) ____________________.
Fill in the blank(s) with the appropriate word(s).
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Pressure treated lumber decking, typically made from ____, is durable and inexpensive but must be handled and disposed of carefully due to the chemicals used in production.
A. oak B. southern pine C. heartwood D. Ipe
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How are transformers in the HVACR field rated?
A) by primary power output B) by induction ratio C) by secondary power output D) by step-down capacity
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