100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
FDNY Z51/ WRITTEN Z51 TEST EXAM RECENT VERSION UPDATED WITH ALL 220 QUESTIONS AND DETAILED ANSWERS GRADED A $24.99   Add to cart

Exam (elaborations)

FDNY Z51/ WRITTEN Z51 TEST EXAM RECENT VERSION UPDATED WITH ALL 220 QUESTIONS AND DETAILED ANSWERS GRADED A

 4 views  0 purchase
  • Course
  • FDNY Z51
  • Institution
  • FDNY Z51

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: - CORRECT ANSWER️ Lowering the condenser pressure The heat removed from the refrigerant in a condenser is: - CORRECT ANSW...

[Show more]

Preview 4 out of 32  pages

  • September 11, 2024
  • 32
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • FDNY Z51
  • FDNY Z51
avatar-seller
tevstudy234
FDNY Z51/ WRITTEN Z51 TEST EXAM RECENT
2024- 2026VERSION UPDATED WITH ALL 220
QUESTIONS AND DETAILED ANSWERS
GRADED A

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: - CORRECT ANSWER✔️
Lowering the condenser pressure

The heat removed from the refrigerant in a condenser is: -
CORRECT ANSWER✔️ 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
sultable containers. According to the New York City fire code, you
must ensure that the containers: - CORRECT ANSWER✔️
approved by us department of transportation

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

In most semi Hermetic compressors, the suction vapor is used to:
- CORRECT ANSWER✔️ Cools the motor

,The amount of refrigerant that flows through the orifices of a
economizer is determined by the: - CORRECT ANSWER✔️
Difference between high and low side pressure

The Installation of an Inline refrigerant cleaning system is
advisable: - CORRECT ANSWER✔️ To remove impurities from
the system

The type of refrigerant system that is least likaly to leak refrigerant
into the building space that are being cooled: - CORRECT
ANSWER✔️ The Indirect system

The suction pressure of a reciprocating compressor is 65 PSIG.
The discharge pressure of this compressor is 120 PIG. The
atmospheric is 14.7 PSI. The compression ratio for the given
condition is
closest to: - CORRECT ANSWER✔️ 1.69
Discharge/suction

A superheated vapor is a: - CORRECT ANSWER✔️ 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: - CORRECT ANSWER✔️ A faulty cooling tower water level
controller

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

A TXV is used to maintain constant - CORRECT ANSWER✔️
Evaporator superheat

The chilled water supply to the bullding Is 55F. IF the chiller Is
being used for human comfort, should you be concerned about
this, and why? - CORRECT ANSWER✔️ Yes, this temp is too
high for human comfort

The packing gland of a centrifugal pump serves to: - CORRECT
ANSWER✔️ 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 - CORRECT ANSWER✔️ Operation of
the hot gas bypass valve

The most important reason to sub-cool the refrigerant in the
condenser is to ensure that: - CORRECT ANSWER✔️ 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. - CORRECT
ANSWER✔️ Malfunction of unloader

, A low side float valve is used to maintain: - CORRECT
ANSWER✔️ The level of the refrigerant in the evaporator

Regarding fire safety, which ASHRAE refrigerant safety
classification Indicates no flammability and lower toxicity? -
CORRECT ANSWER✔️ A1

When an expansion valve is operating property, af the end of the
evaporator will contain: - CORRECT ANSWER✔️ Only
superheated vapor

What Information is not contained in a Material Safety Data
Sheet-MSD5? - CORRECT ANSWER✔️ Cost of material

In a steam turbing, what is the function of the Kingsbury thrust
bearing - CORRECT ANSWER✔️ Maintain first stage steam
pressure

A centrifugal water pump is considered to be fully primed when -
CORRECT ANSWER✔️ The pump is full of liquid

Copper tubing refrigerant lines must be installed for a new
system. It is a well known service practice that tubing collapses at
bends that must be made, the refrigerant engineer should use -
CORRECT ANSWER✔️ Lever type tubing bender

A reciprocating compressor is making a knocking sound during
operation. If the refrigerant worn parts are not causing the

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 tevstudy234. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $24.99. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

83637 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
$24.99
  • (0)
  Add to cart