NCCER Module 5 Introduction to Cooling Exam Questions and Correct Answers Latest Update Graded
A+
The Celsius scale is based on boiling water having a temperature at sea level of_? - Answers 100°
Subcooling occurs_. - Answers After all vapor has changed to liquid
When the temperature of a vapor is higher than its boiling point, the vapor is_? - Answers Superheated
When heat is carried from one object to another by means of a moving liquid or gas, it is being
transferred by_? - Answers Convection
A ton of refrigeration is equal to_? - Answers 12,000 BTUs per hour
When the pressure on a liquid in a closed space is increased, what happens to the boiling point? -
Answers It raises the boiling point
In a refrigeration system, the high-pressure, high temperature vapor is converted into a high pressure,
high temperature liquid by the_? - Answers Condenser
Most all of today's standard refrigerant gauge manifold have a high pressure gauge that goes up to_? -
Answers 800 psig
The substance in refrigerant that is primarily responsible for damaging the O-Zone layer is_? - Answers
Chlorine
Which of the following statements about refrigerant mixtures is correct? - Answers When a leak
develops, more of one refrigerant may leak out then the other refrigerants
Which of the following statements about ammonia is true? - Answers Ammonia piping cannot be
constructed from copper
The net weight of a refrigerant cylinder is the_? - Answers Weight of the contents alone
The construction and labeling of refrigerant containers is governed by_? - Answers the DOT
In a semi hermetic compressor,_? - Answers The compressor and drive motor share a common housing
Which type of compressor is typically used only in systems needing 100 tons of capacity or more? -
Answers Centrifugal
Which type of condenser is generally used only with small domestic refrigeration systems? - Answers
Plate
For an evaporator to operate a peek efficiency,_? - Answers All of the surface area inside the tubes must
be exposed to flashing liquid
One of the advantages of a fixed metering device is_? - Answers It's low cost
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The Celsius scale is based on boiling water having a temperature at sea level of_? - Answers 100°
Subcooling occurs_. - Answers After all vapor has changed to liquid
When the temperature of a vapor is higher than its boiling point, the vapor is_? - Answers Superheated
When heat is carried from one object to another by means of a moving liquid or gas, it is being
transferred by_? - Answers Convection
A ton of refrigeration is equal to_? - Answers 12,000 BTUs per hour
When the pressure on a liquid in a closed space is increased, what happens to the boiling point? -
Answers It raises the boiling point
In a refrigeration system, the high-pressure, high temperature vapor is converted into a high pressure,
high temperature liquid by the_? - Answers Condenser
Most all of today's standard refrigerant gauge manifold have a high pressure gauge that goes up to_? -
Answers 800 psig
The substance in refrigerant that is primarily responsible for damaging the O-Zone layer is_? - Answers
Chlorine
Which of the following statements about refrigerant mixtures is correct? - Answers When a leak
develops, more of one refrigerant may leak out then the other refrigerants
Which of the following statements about ammonia is true? - Answers Ammonia piping cannot be
constructed from copper
The net weight of a refrigerant cylinder is the_? - Answers Weight of the contents alone
The construction and labeling of refrigerant containers is governed by_? - Answers the DOT
In a semi hermetic compressor,_? - Answers The compressor and drive motor share a common housing
Which type of compressor is typically used only in systems needing 100 tons of capacity or more? -
Answers Centrifugal
Which type of condenser is generally used only with small domestic refrigeration systems? - Answers
Plate
For an evaporator to operate a peek efficiency,_? - Answers All of the surface area inside the tubes must
be exposed to flashing liquid
One of the advantages of a fixed metering device is_? - Answers It's low cost
