Complete Real Exam Questions And Correct Answers
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What effect does the presence of non condensable gas have
on the power required to produce refrigeration ? - ANSWER-
Non condensables cause an increase in power consumption
What is the primary advantage of using a refrigerated auto
purger over manually purging directly from the system -
ANSWER-Less refrigerant lost per pound of non condensable
gas removed
What are the main advantages of axial fan condensers ? -
ANSWER-It is more
energy
efficient
A shortage of water in a shell and tube condenser will cause
the - ANSWER-
head pressure to
increase
, Desuperheating coils are effective in - ANSWER-reducing
discharge gas
temperature entering the
condenser
Before the formation of liquid occurs in the condenser , the
refrigerant vapor
must be - ANSWER-
desuperheated
Which of the following expansion devices would not normally
be used as a part
of a small refrigeration system ? - ANSWER-Hand
expansion valve
Gravity feed flooded evaporators - ANSWER-provide the
maximum heat
transfer for given
evaporator size .
The pumped recirculated type evaporator - ANSWER-does not
have to be close
to the vessel that feeds it
liquid
Which of the following secondary cooling devices operates as a
thermal storage
device ? - ANSWER-Ice
builder