100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
fdny z51 written z51 (actual exam)questions,answers 2024 – 2025 $12.99   Add to cart

Exam (elaborations)

fdny z51 written z51 (actual exam)questions,answers 2024 – 2025

 3 views  0 purchase
  • Course
  • Fdny z51 written z51
  • Institution
  • Fdny Z51 Written Z51

fdny z51 written z51 (actual exam)questions,answers 2024 – 2025

Preview 4 out of 31  pages

  • September 10, 2024
  • 31
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Fdny z51 written z51
  • Fdny z51 written z51
avatar-seller
NurseLNJ
fdny z51 written z51 (actual
exam)questions,answers 2024 – 2025




What are pre hot works procedures performed prior to hot works? - ANSWERS-
Check area once a day leading up to hot works



A chilled water system has an air cooled condensing unit on a roof during cold
weather ha what type of protection? - ANSWERS-Air limiting device



What is a compressor safety head? - ANSWERS-A spring on the valve plate



Stand pipe certificate should be available for? - ANSWERS-FDNY and building
inspector



When is a chemical fire extinguisher system needed? - ANSWERS-Where water is
not sufficient

,In most semi hermetic compressors, the suction vapor is used to: - ANSWERS-Cool
the motor



The amount of refrigerant that flows through the orifices of a economizer is
determined by the: - ANSWERS-Difference between the high side and load side
pressure



The installation of an inline refrigerant cleaning system is advisable: - ANSWERS-
To remove impurities from the system



The type of refrigerant system that is least likely to leak refrigerant into the
building space that are cooled - ANSWERS-The indirect system




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: - ANSWERS-Lowering the condensing pressure



The heat removed from the refrigerant in a condenser is: - ANSWERS-Sensible and
latent heat



The refrigerant unit that you have been assigned to is being taken out of service
for a major repair. you have been assigned to withdraw refrigerant for storage in
suitable containers. according to the new York city fire code, you must ensure

,that the containers: - ANSWERS-Are approved by the US department of
transportation



Which of the following best describes how the cylinder unloader work? -
ANSWERS-Keep in the suction valve opened while the compressor is in the return
stroke



The suction pressure of a reciprocating compressor is 65PSIG. the discharge
pressure of this compressor is 120PSIG. the atmospheric is 14.7 PSI. the
compression ratio for the given condition is closet to: - ANSWERS-1.69



A super heated vapor is a ? - ANSWERS-Dry vapor above the saturation
temperature



A refrigerant engineer verifies that a condenser water pump is cavitating. of the
following the most likely cause for this condition is: - ANSWERS-A faulty cooling
tower water level controller



A centrifugal water pump is known as a lift pump when the: - ANSWERS-The
water supply to the pump suction inlet is below the pump level



A TXV is used to maintain constant: - ANSWERS-Evaporator superheat

, The chilled water supply to the building is 55F. if the chiller is being used for
human comfort, should you be concerned about this , and why? - ANSWERS-Yes,
this temperature is too high for human comfort purpose



The packing gland of a centrifugal pump serves to: - ANSWERS-The drip part of
the packing gland gives evidence that there is water in the pump



Capacity control of a reciprocating hermetic compressor is typically achieved
through - ANSWERS-Operation of the hot gas bypass valve



The most important reason to sub-cool the refrigerant in the condenser is to
ensure that: - ANSWERS-A pure liquid refrigerant will enter the metering device



A refrigeration engineer is logging reading from a reciprocating system.
compressor discharge temperature have dropped significantly and the suction
line pressure is high. which of the following that may be causing this set of
condition. - ANSWERS-An expansion valve that is open to wide



A low side float valve is used to maintain: - ANSWERS-The level of the refrigerant
in the evaporator



Regarding fire safety, which ASHARE refrigerant safety classification indicates no
flammability and lower the toxicity? - ANSWERS-A1

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller NurseLNJ. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $12.99. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

62491 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
$12.99
  • (0)
  Add to cart