Ammonia Refrigeration Final Exam Questions & Answers 100% Correct!!
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Course
Ammonia Refrigeration \\
Institution
Ammonia Refrigeration \\
Convection is the transfer of ____ - ANSWER-heat through a material or substance
Radiation is the ____ - ANSWER-projection of heat like the heat radiated by the sun or by an open flame
T or F: Heat is always on the move, traveling only in one direction and always from hot to cold - ANSWER-fal...
Ammonia
Refrigeration Final
Exam Questions &
Answers 100%
Correct!!
Convection is the transfer of ____ - ANSWER-heat through a material or substance
Radiation is the ____ - ANSWER-projection of heat like the heat radiated by the sun or by an open
flame
T or F: Heat is always on the move, traveling only in one direction and always from hot to cold -
ANSWER-false
What are two methods of heat transfer? - ANSWER-conduction and convection
What are two basic forms of refrigeration systems? - ANSWER-direct expansion and gravity flooded
T or F: Conduction is the heat transferred due to the temperature being different on one side of a
room than the other like the heat rising in a room - ANSWER-true
, T or F: A basic refrigeration system consists of an expansion device, an evaporator, a compressor, and
a condenser connected by a series of pipes - ANSWER-true
T or F: Compression occurs as the ammonia refrigerant passes through the evaporator - ANSWER-
false
T or F: The high side includes all components between the pressure reduction device outlet to a
point inside the compressor - ANSWER-false
T or F: Expansion occurs as the refrigerant flows through the compressor - ANSWER-false
T or F: When a hand expansion valve is opened, pressure behind the valve forces liquid ammonia
through a small opening causing a deliberate pressure drop to occur - ANSWER-false
T or F: Evaporation takes place as the ammonia refrigerant flows through the compressor - ANSWER-
false
T or F: The evaporation process is completed when the ammonia has passed through the evaporator
- ANSWER-true
Absolute pressure is the pressure read by a gauge, plus the ____ atmospheric pressure - ANSWER-
ambient
T or F: A pumped liquid, or re-circulation single stage system consists of a receiver, a king valve, a
pressure reduction device, an evaporator, a compressor, a condenser, a vessel, a pump and an
additional flow metering device - ANSWER-true
Where is the worst place to have a leak in an ammonia refrigeration system? - ANSWER-high
pressure liquid
How many BTUs does it take to convert 1 lb of saturated ammonia to 1 lb of saturated gas? -
ANSWER-561
How many BTUs does it take to convert 1 lb of liquid water at 212° to steam as 212°F - ANSWER-970
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