Preparation / Questions And 100Correct Detailed Answers
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An ammonia condenser is operating at 183 psig
condensing pressure and 91 degrees F saturated liquid
temperature. What is indicated?
a. liquid is subcooled 4 degrees F
b. non-condensable gas in the system
c. system operating normally
d. liquid temperature indicates slugging - ANSWER-b.
non-condensable gas in the system
If an automatic purger purge count is increasing at a
higher rate than usual, or if the purger is on one long
continuous dump, this indicates ___
, a. air infiltration
b. operation at design conditions
c. no air in the system
d. a faulty compressor - ANSWER-a. air infiltration
The primary advantage of using a refrigerated automatic
purger over manually purging directly from the system is
___
a. the system must be shut down to accomplish manual
purging
b. less refrigerant lost per pound of non-condensable gas
removed
c. a refrigerated automatic purger uses less power to
accomplish the purging