FDNY Z51/ WRITTEN Z51 TEST EXAM RECENT VERSION UPDATED WITH ALL 220 QUESTIONS AND DETAILED ANSWERS GRADED A
4 keer bekeken 0 keer verkocht
Vak
FDNY Z51
Instelling
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...
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
Voordelen van het kopen van samenvattingen bij Stuvia op een rij:
√ Verzekerd van kwaliteit door reviews
Stuvia-klanten hebben meer dan 700.000 samenvattingen beoordeeld. Zo weet je zeker dat je de beste documenten koopt!
Snel en makkelijk kopen
Je betaalt supersnel en eenmalig met iDeal, Bancontact of creditcard voor de samenvatting. Zonder lidmaatschap.
Focus op de essentie
Samenvattingen worden geschreven voor en door anderen. Daarom zijn de samenvattingen altijd betrouwbaar en actueel. Zo kom je snel tot de kern!
Veelgestelde vragen
Wat krijg ik als ik dit document koop?
Je krijgt een PDF, die direct beschikbaar is na je aankoop. Het gekochte document is altijd, overal en oneindig toegankelijk via je profiel.
Tevredenheidsgarantie: hoe werkt dat?
Onze tevredenheidsgarantie zorgt ervoor dat je altijd een studiedocument vindt dat goed bij je past. Je vult een formulier in en onze klantenservice regelt de rest.
Van wie koop ik deze samenvatting?
Stuvia is een marktplaats, je koop dit document dus niet van ons, maar van verkoper tevstudy234. Stuvia faciliteert de betaling aan de verkoper.
Zit ik meteen vast aan een abonnement?
Nee, je koopt alleen deze samenvatting voor $24.99. Je zit daarna nergens aan vast.
