Steam is circulated through a steam heating system
A) Because of the density difference between steam and water
B) Using steam circulating pumps
C) Using external drive steam compressors
D) using large diaphragm pumps
A
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Transmission oil pumps are being discussed: Technician A says high line pressure would result if the relief valve spring is broken or missing. Technician B says the relief valve is designed to restrict the fluid flow until operating pressures are achieved. Who is correct?
A. A only C. Both A and B B. B only D. Neither A nor B
The text states that management is very complex because it is focused on working with the most unpredictable ingredient known to man. What is this ingredient?
What will be an ideal response?
What is the normal pressure range for compound pressure gauges made for use on systems with older refrigerants such as R-22 or R-134a?
A) 0 - 30" Hg vacuum and 0 - 350 psig pressure B) 0 - 800 psig pressure C) 0 - 30" Hg vacuum and 0 - 120 psig pressure D) 0 - 500 psig pressure
Railings should be used at stairs, landings, decks, and open balconies higher than _____ above the floor.
A. 12" (300 mm) B. 18" (450 mm) C. 24" (600 mm) D. 30" (750 mm)