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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+

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FDNY Z51 EXAM (ACTUAL EXAM) WITH QUESTIONS WITH VERY ELABORATED ANSWERS CORRECTRY WELL ORGANIZED LATEST 2024 – 2025 ALREADY GRADED A+

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  • August 29, 2024
  • 16
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • FDNY Z51
  • FDNY Z51

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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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