CFESA Refrigeration Chapter 25
Q – answer A
- answer A
Low subcooling and high superheat on a cap tube system indicates what? - answer
What does high subcooling and high superheat indicate on a cap tube system? -
answer
What does excessive evaporator temperature drop and low superheat indicate? -
answer
The most efficient freezer operates at what superheat? - answer
What does high condenser temperature rise and high head pressure indicate? - answer
Normal evaporator superheat and high compressor superheat indicates a problem
where? - answer
A condensing temperature of 290 degrees F tells us what in regards to the compressor?
- answer
Low superheat, high evaporator temperature drop, along with high head pressure and
high subcooling tells you what? - answer
A walk cooler has normal head pressure, subcooling, and evaporator temperature drop.
The box temperature is near 38 degrees and the superheat is 1 degree F. What needs
to be done? - answer
A walk in freezer compressor keeps tripping the overload. The evaporator head
pressure is normal as is the condenser temperature rise. The superheat is 10 degrees
F. The evaporator temperature drop is low. The compressor superheat is 40 degrees.
The suction pressure at the evaporator is 60 Psi, and at the compressor suction service
valve the pressure reads 40 Psi. What is the problem? - answer
Q – answer A
- answer A
Low subcooling and high superheat on a cap tube system indicates what? - answer
What does high subcooling and high superheat indicate on a cap tube system? -
answer
What does excessive evaporator temperature drop and low superheat indicate? -
answer
The most efficient freezer operates at what superheat? - answer
What does high condenser temperature rise and high head pressure indicate? - answer
Normal evaporator superheat and high compressor superheat indicates a problem
where? - answer
A condensing temperature of 290 degrees F tells us what in regards to the compressor?
- answer
Low superheat, high evaporator temperature drop, along with high head pressure and
high subcooling tells you what? - answer
A walk cooler has normal head pressure, subcooling, and evaporator temperature drop.
The box temperature is near 38 degrees and the superheat is 1 degree F. What needs
to be done? - answer
A walk in freezer compressor keeps tripping the overload. The evaporator head
pressure is normal as is the condenser temperature rise. The superheat is 10 degrees
F. The evaporator temperature drop is low. The compressor superheat is 40 degrees.
The suction pressure at the evaporator is 60 Psi, and at the compressor suction service
valve the pressure reads 40 Psi. What is the problem? - answer
