In which type of piping system is the first heating unit supplied with hot water also the last heater to return its water to the boiler?
A. series loop
B. one-pipe system
C. two-pipe system
D. two-pipe reverse return system
Answer: D
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The ____________________ charging system is the simplest charging system.
Fill in the blank(s) with the appropriate word(s).
What is the suction pressure of an R404A unit operating at an evaporator temperature of -10°?
a. 8 psig b. 24 psig c. 26 psig d. 34 psig
A passive-type wheel speed sensor (WSS) is being checked for the proper resistance which should be 800—2,500 ohms. The meter reads 1.1 K?. This means ________
A) The sensor is electrically shorted B) The sensor has a normal resistance reading C) The sensor is electrically open D) The sensor is grounded
A bulge on a brake hose is ________
A) Normal only on hoses made before the mid-1960s B) Normal with silicone brake fluid C) Normal D) An indication of an internal leak