Z51 REFRIGERATION TEST NEWEST TEST | ALL
QUESTIONS AND CORRECT ANSWERS |
GRADED A+ | VERIFIED ANSWERS | STUDY
THIS ONE!
What is the order of components on the liquid line of reciprocating system
from the condenser? ------CORRECT ANSWER---------------King valve, filter
drier, solenoid valve, sight glass
A high side float valve is used to maintain: ------CORRECT ANSWER--------
-------Constant level of refrigerant in the evaporator
Picture of a pump ------CORRECT ANSWER---------------Ninety degrees
reducing elbow, pump suction, pump casing, pump discharge, check valve
Picture of a compressor ------CORRECT ANSWER---------------Oil charging
port allows for the addition and removal of oil from the compressor
A facility has failed to maintain water treatment to a refrigerant system ------
CORRECT ANSWER---------------Increase in the condenser pressure
Which of these compressors is not a positive displacement type
compressor? ------CORRECT ANSWER---------------Centrifugal
Where is emergency power not required according to code? ------
CORRECT ANSWER---------------Data centers
,What is the most widely used regulation book by operating engineers? ------
CORRECT ANSWER---------------EPA (Environmental Protection Agency)
What type of refrigerant do you need FDNY approval for? ------CORRECT
ANSWER---------------Propane
A refrigeration system uses jet ejector to raise settled oil mixed with
refrigerant to the oil pump. If a restriction in the refrigerant flow to the jet
ejector develops: ------CORRECT ANSWER---------------There may be
insufficient head to lift the oil
An indirect, low temperature refrigerant system frequently uses glycol,
instead of salt brine as the intermediate cooling medium. An advantage of
this choice is: ------CORRECT ANSWER---------------The elimination of
corrosion
In relation to the suction pressure of a compressor, the reading on the oil
pressure guage should read in the range, closer to: ------CORRECT
ANSWER---------------15 to 30 PSI higher
Non-condensable gases like air, oil vapor, or nitrogen travel through a
refrigerant system with the refrigerant they usually accumulate in the: ------
CORRECT ANSWER---------------Condenser
,The advantage of forced draft cooling tower over natural draft cooling
towers is: ------CORRECT ANSWER---------------Smaller tower size
The sole refrigeration engineer on duty in a building is permitted to leave
the building refrigeration system when it is in operation only when: ------
CORRECT ANSWER---------------Relieved by another licensed refrigeration
engineer
A system controlled by a TXV shows high discharge pressure and high
normal subcooling. The cause is most probably a: ------CORRECT
ANSWER---------------Refrigerant overcharge
Which of the following is a correct statement? ------CORRECT ANSWER----
-----------2.5 gallons of water weighs 20.8 pounds
Liquid level gauge glasses (except the bull's eye) are generally equipped
with: ------CORRECT ANSWER---------------Automatic shut off valves only
Copper and aluminum are frequently used for condenser tubes in
refrigeration system. These metals are used because of their: ------
CORRECT ANSWER---------------High heat transfer coefficient
Assume that a refrigeration engineer has a choice of four valves to select
from. Which of the following is the most effective type of valve to control
pressure? ------CORRECT ANSWER---------------Plug valve
, Where must the Material Safety Data Sheets be located? ------CORRECT
ANSWER---------------Where available to all employees
The oil collected in an oil separator is generally: ------CORRECT ANSWER-
--------------Returned to the compressor
What is the function of gland steam? ------CORRECT ANSWER---------------
Seal the turbine rotor carbon rings
Regarding the functioning of steam turbine, how is the water level
controlled in the surface condenser hot well? ------CORRECT ANSWER-----
----------Operation of the recirculation and overboard valves
The cause of the starved evaporator might be: ------CORRECT ANSWER---
------------Low refrigerant charge
A refrigeration engineer is running two centrifugal condenser water pumps
in parallel. One of the pumps is at it's maximum pumping rate. If by
mistake, the refrigeration engineer throttles back on the discharge valve of
the other pump, the most likely effect will be: ------CORRECT ANSWER-----
----------A reduction on the total flow rate to the condenser
The total amount of heat to be removed from the refrigerant in a condenser
equals the heat picked up in the: ------CORRECT ANSWER---------------
Evaporator plus the heat of compression
QUESTIONS AND CORRECT ANSWERS |
GRADED A+ | VERIFIED ANSWERS | STUDY
THIS ONE!
What is the order of components on the liquid line of reciprocating system
from the condenser? ------CORRECT ANSWER---------------King valve, filter
drier, solenoid valve, sight glass
A high side float valve is used to maintain: ------CORRECT ANSWER--------
-------Constant level of refrigerant in the evaporator
Picture of a pump ------CORRECT ANSWER---------------Ninety degrees
reducing elbow, pump suction, pump casing, pump discharge, check valve
Picture of a compressor ------CORRECT ANSWER---------------Oil charging
port allows for the addition and removal of oil from the compressor
A facility has failed to maintain water treatment to a refrigerant system ------
CORRECT ANSWER---------------Increase in the condenser pressure
Which of these compressors is not a positive displacement type
compressor? ------CORRECT ANSWER---------------Centrifugal
Where is emergency power not required according to code? ------
CORRECT ANSWER---------------Data centers
,What is the most widely used regulation book by operating engineers? ------
CORRECT ANSWER---------------EPA (Environmental Protection Agency)
What type of refrigerant do you need FDNY approval for? ------CORRECT
ANSWER---------------Propane
A refrigeration system uses jet ejector to raise settled oil mixed with
refrigerant to the oil pump. If a restriction in the refrigerant flow to the jet
ejector develops: ------CORRECT ANSWER---------------There may be
insufficient head to lift the oil
An indirect, low temperature refrigerant system frequently uses glycol,
instead of salt brine as the intermediate cooling medium. An advantage of
this choice is: ------CORRECT ANSWER---------------The elimination of
corrosion
In relation to the suction pressure of a compressor, the reading on the oil
pressure guage should read in the range, closer to: ------CORRECT
ANSWER---------------15 to 30 PSI higher
Non-condensable gases like air, oil vapor, or nitrogen travel through a
refrigerant system with the refrigerant they usually accumulate in the: ------
CORRECT ANSWER---------------Condenser
,The advantage of forced draft cooling tower over natural draft cooling
towers is: ------CORRECT ANSWER---------------Smaller tower size
The sole refrigeration engineer on duty in a building is permitted to leave
the building refrigeration system when it is in operation only when: ------
CORRECT ANSWER---------------Relieved by another licensed refrigeration
engineer
A system controlled by a TXV shows high discharge pressure and high
normal subcooling. The cause is most probably a: ------CORRECT
ANSWER---------------Refrigerant overcharge
Which of the following is a correct statement? ------CORRECT ANSWER----
-----------2.5 gallons of water weighs 20.8 pounds
Liquid level gauge glasses (except the bull's eye) are generally equipped
with: ------CORRECT ANSWER---------------Automatic shut off valves only
Copper and aluminum are frequently used for condenser tubes in
refrigeration system. These metals are used because of their: ------
CORRECT ANSWER---------------High heat transfer coefficient
Assume that a refrigeration engineer has a choice of four valves to select
from. Which of the following is the most effective type of valve to control
pressure? ------CORRECT ANSWER---------------Plug valve
, Where must the Material Safety Data Sheets be located? ------CORRECT
ANSWER---------------Where available to all employees
The oil collected in an oil separator is generally: ------CORRECT ANSWER-
--------------Returned to the compressor
What is the function of gland steam? ------CORRECT ANSWER---------------
Seal the turbine rotor carbon rings
Regarding the functioning of steam turbine, how is the water level
controlled in the surface condenser hot well? ------CORRECT ANSWER-----
----------Operation of the recirculation and overboard valves
The cause of the starved evaporator might be: ------CORRECT ANSWER---
------------Low refrigerant charge
A refrigeration engineer is running two centrifugal condenser water pumps
in parallel. One of the pumps is at it's maximum pumping rate. If by
mistake, the refrigeration engineer throttles back on the discharge valve of
the other pump, the most likely effect will be: ------CORRECT ANSWER-----
----------A reduction on the total flow rate to the condenser
The total amount of heat to be removed from the refrigerant in a condenser
equals the heat picked up in the: ------CORRECT ANSWER---------------
Evaporator plus the heat of compression
