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FDNY Z51 EXAM (ACTUAL EXAM) WITH QUESTIONS WITH VERY ELABORATED ANSWERS CORRECTRY WELL ORGANIZED LATEST 2024 – 2025 ALREADY GRADED A+ $13.99
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FDNY Z51 EXAM (ACTUAL EXAM) WITH
QUESTIONS WITH VERY ELABORATED
ANSWERS CORRECTRY WELL ORGANIZED
LATEST 2024 – 2025 ALREADY GRADED A+
A standpipe system will be out of service for 2 days how long should there be fire
watch
The entire time the standpipe is out of service
In a building with a multi zone How does each zone get supplied with water
Each zone will have its own automatic water supply
Which service valve should be Install to isolate dual pressure relief valve while
keeping the system in service
3 way valve
the instalation of an inline refrigerant cleaning system is advisable
to remove impurities from the system
,a refrigerant engineer verifies that a condenser pump is cavitating of the
following the most likely cause for this condition is:
a faulty cooling tower water level controller
when an expansion valve is operating properly, at the end of the evaporator will
contain
only superheated vapor
The efficiency of the refrigerant cycle is affected by the operation of the
condenser. Of the following, a more efficient centrifugal compressor operation
results from
Lowering the condenser pressure
In most semi hermetic compressors, the suction vapor is used too
Cool's the motor
The amount of refrigerant that flows through the orifices of an economizer is
determined by the
Difference between the high side and the low side pressure
a centrifugal water pump is considered to be fully primed when
the pump is full of liquid
, A refrigeration compressor has failed to turn on. the engineer on duty verifies the
electrical circuit to the motor, including all switches and circuit breakers is
complete, according to recomended service practice, the next item to be checked
would likely be the:
temperature and pressure controls
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:
ammonia
which of the following ashrae refrigerant safety classification which is most toxic
B3
which of the following ashrae refrigerant safety classification is the most
flammable
A3
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
r-22 (cooling medium= glycol or any brine solution)
the primary way of achieving capacity control of a an centrifugal compressor is by:
adjustment of the inlet impeller pre-rotational vanes
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