On a single acting reciprocating compressor, what is the It allows constant speed control and automatic start and stops
function of a dual control device?
If a system were using an automatic expansion valve, what The evaporator
would the constant pressure be maintained at?
What is the main advantage of a cascade refrigeration Capable of reaching very low temperature
system?
Choose the statement below, which would prove false It is non-corrosive
about lithium bromide used in absorption system.
What is a sling psychrometer device used to measure? Relative humidity
A system using an evaporative condenser operates most When the wet-bulb temperature of air is low
efficiently under what conditions?
The discharge gas from the compressor is what, in a wet- Saturated
compression refrigeration system?
If a refrigeration system were over charged with Decrease in capacity and increase in head pressure
refrigerant, what conditions would occur?
If a cooling tower circulated 4,300 GPM of water, what is 1,433 tons
the cooling capacity in tons?
What condition would cause a system to not respond to an Oil in the evaporator
expansion valve adjustment?
In an absorption system, the generator receives what Strong liquor
medium?
Which would have the lease effect on the capacity of a The ambient air temperature
water-cooled condenser?
What is the volume occupied by a refrigerant under Specific volume
specified conditions of pressure and temperature?
What should a cooling tower water pH be maintained at? 8
The absolute Celsius scale is referred to by which Kelvin
temperature scale?
,Which devices control the high side float? Condenser and receiver
In Fahrenheit, what is the equivalent of -15 degrees 5 degrees F
Celsius?
If you had a flooded evaporator, which type of metering Low side float
device would you use?
Choose the formula used to determine the number of Cycles = Tower water chlorides / Makeup water chlorides
cycles of concentration for a cooling tower?
What determines the low side pressure in a refrigeration The amount if load on the system
system?
Which seal is not used on a refrigeration system? Mechanical
Which water chemistry test is used to determine cooling Chlorides
tower cycles of concentration?
Why is a rheostat used on a synchronous motor? To vary the power factor to the load conditions
What would happen if you had a sudden drop in the Crystallization in the system
temperature in the cooling tower of a lithium bromide
absorption system?
What is the function of a heat exchanger in an absorption Allows the weak liquor to heat the strong liquor
system?
Define the term "refrigerant reclaiming" Selling reprocessed refrigerant as "reclaimed refrigerant" ; Reprocessing the
refrigerant into a new product that can be reused ; Chemically analyzing and
distilling the refrigerant ; All of the above
Which phrase best describes the term "free air"? Air at atmospheric conditions
How is the setting on a thermostatic expansion valve Degrees of superheat
rated?
Which statement describes the operation of a single acting The refrigeration gas is compressed on only one side of the piston
compressor?
Which of the following would cause a noisy compressor? Lack of oil ; Dry damaged seal ; Loose drive coupling ; All of the above
, When the evaporator load increases, what happens to the Flow remains constant with a corresponding pressure increase
suction pressure of the system?
Thermostatic expansion valves are rated in what units of Tons of refrigeration
measurement?
If a cooling tower has a pH of 7.8 it is considered Slightly alkaline
Where would you find flash gas in an efficiently operating The evaporator
system?
The capacity of an evaporative condenser is determined The amount of heat the entering air can absorb ; The amount of air flowing over the
by coil ; The area of the refrigerant coil surface ; All of the above
The ratio between the actual pressures of the vapor to its Relative Humidity
saturation pressure in the atmosphere is known as
A cooling tower is circulating 2,850 GPM of water: What is 950 tons
the cooling capacity in tons?
What conditions can cause high discharge pressure in a Refrigerant overcharge ; An undersized condenser ; Insufficient cooling water to the
system? condenser ; All of the above
What would frost on the suction line of a system using a Overcharged system
high side float indicate?
In an absorption system, what would cause the strength of Decrease in the load on the evaporator
the strong liquor to decrease?
What type of heat exchange occurs at the exterior sides of Convection
a cooling tower?
Which of the following statements is true regarding the Ratio varies according to the conditions under which it operates
compression ratio of a reciprocating compressor?
If the high side float were to fill with liquid and sink, what The evaporator would starve for refrigerant
would be the result?
In a refrigeration system, what part is considered the low Between the compressor and evaporator
side?
What function does the evaporator perform in a None of the above
refrigeration system?
function of a dual control device?
If a system were using an automatic expansion valve, what The evaporator
would the constant pressure be maintained at?
What is the main advantage of a cascade refrigeration Capable of reaching very low temperature
system?
Choose the statement below, which would prove false It is non-corrosive
about lithium bromide used in absorption system.
What is a sling psychrometer device used to measure? Relative humidity
A system using an evaporative condenser operates most When the wet-bulb temperature of air is low
efficiently under what conditions?
The discharge gas from the compressor is what, in a wet- Saturated
compression refrigeration system?
If a refrigeration system were over charged with Decrease in capacity and increase in head pressure
refrigerant, what conditions would occur?
If a cooling tower circulated 4,300 GPM of water, what is 1,433 tons
the cooling capacity in tons?
What condition would cause a system to not respond to an Oil in the evaporator
expansion valve adjustment?
In an absorption system, the generator receives what Strong liquor
medium?
Which would have the lease effect on the capacity of a The ambient air temperature
water-cooled condenser?
What is the volume occupied by a refrigerant under Specific volume
specified conditions of pressure and temperature?
What should a cooling tower water pH be maintained at? 8
The absolute Celsius scale is referred to by which Kelvin
temperature scale?
,Which devices control the high side float? Condenser and receiver
In Fahrenheit, what is the equivalent of -15 degrees 5 degrees F
Celsius?
If you had a flooded evaporator, which type of metering Low side float
device would you use?
Choose the formula used to determine the number of Cycles = Tower water chlorides / Makeup water chlorides
cycles of concentration for a cooling tower?
What determines the low side pressure in a refrigeration The amount if load on the system
system?
Which seal is not used on a refrigeration system? Mechanical
Which water chemistry test is used to determine cooling Chlorides
tower cycles of concentration?
Why is a rheostat used on a synchronous motor? To vary the power factor to the load conditions
What would happen if you had a sudden drop in the Crystallization in the system
temperature in the cooling tower of a lithium bromide
absorption system?
What is the function of a heat exchanger in an absorption Allows the weak liquor to heat the strong liquor
system?
Define the term "refrigerant reclaiming" Selling reprocessed refrigerant as "reclaimed refrigerant" ; Reprocessing the
refrigerant into a new product that can be reused ; Chemically analyzing and
distilling the refrigerant ; All of the above
Which phrase best describes the term "free air"? Air at atmospheric conditions
How is the setting on a thermostatic expansion valve Degrees of superheat
rated?
Which statement describes the operation of a single acting The refrigeration gas is compressed on only one side of the piston
compressor?
Which of the following would cause a noisy compressor? Lack of oil ; Dry damaged seal ; Loose drive coupling ; All of the above
, When the evaporator load increases, what happens to the Flow remains constant with a corresponding pressure increase
suction pressure of the system?
Thermostatic expansion valves are rated in what units of Tons of refrigeration
measurement?
If a cooling tower has a pH of 7.8 it is considered Slightly alkaline
Where would you find flash gas in an efficiently operating The evaporator
system?
The capacity of an evaporative condenser is determined The amount of heat the entering air can absorb ; The amount of air flowing over the
by coil ; The area of the refrigerant coil surface ; All of the above
The ratio between the actual pressures of the vapor to its Relative Humidity
saturation pressure in the atmosphere is known as
A cooling tower is circulating 2,850 GPM of water: What is 950 tons
the cooling capacity in tons?
What conditions can cause high discharge pressure in a Refrigerant overcharge ; An undersized condenser ; Insufficient cooling water to the
system? condenser ; All of the above
What would frost on the suction line of a system using a Overcharged system
high side float indicate?
In an absorption system, what would cause the strength of Decrease in the load on the evaporator
the strong liquor to decrease?
What type of heat exchange occurs at the exterior sides of Convection
a cooling tower?
Which of the following statements is true regarding the Ratio varies according to the conditions under which it operates
compression ratio of a reciprocating compressor?
If the high side float were to fill with liquid and sink, what The evaporator would starve for refrigerant
would be the result?
In a refrigeration system, what part is considered the low Between the compressor and evaporator
side?
What function does the evaporator perform in a None of the above
refrigeration system?
