FDNY Z51
RMOFINAL EXAM
LATEST
2024//ALREADY
GRADED A+
Refrigerants are characterized by their physical
properties including Flashpoint, refrigeration
effect and others, of the refrigerants in
commercial and industrial the highest latent
heat and refrigerant effect is: - ANSWERammonia
which of the following ashrae refrigerant safety
classification is the most toxic - ANSWER-b3
which of the following ashrae refrigerant safety
classification is the most flammable - ANSWERa3
in q indirect refrigeration system,of the
following, the one that would not be used as a
cooling medium for building spaces being
cooled is - ANSWER-r 22 (cooling medium=
glycol or any brine solution)
the primary way of achieving capacity control
of a an centrifugal compressor is by: - ANSWERadjustment to the inlet impeller pre rotation
vanes
regarding the functioning of a steam turbine,
why is it advisable to keep moisture in the inlet
low as possible - ANSWER-keeps turbine blades
wear to minimum
a water chiller is equipped with a reciprocating
compressor, a thermostatic expansion valve
and a an air cooled condenser. A restriction in
the refrigerant line would result in - ANSWERhigh suction super heat
the process by which refrigerant is extracted
and cleaned for reuse without requirements for
reclamation is called - ANSWER-recycle
the purpose of wear rings in a centrifugal pump
is to - ANSWER-prevent wearing of the pump
housing and impeller
a centrifugal compressor is in operation with
suction pressure is 3 psig and the discharge is
10psi what is the atmospheric pressure is 14.7
which is the ratio closest to - ANSWER-1.39
electrical current us measured in - ANSWERamperage
the efficiency of the refrigerant cycle is affected
by the operation of the condenser. Of the
following, a more efficient centrifu
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