RETA Chapter 7 Review Quiz with
verified answers
Care must be taken when handling and storing oil containers that have been opened because -
correct answer ✔✔ They should be resealed as oil will absorb moisture from the atmosphere.
Oil in screw compressors have 4 separate functions in refrigeration systems. They are - correct
answer ✔✔ Lubrication, sealing, cooling, and cleaning
Is oil heavier or lighter than liquid ammonia? - correct answer ✔✔ Heavier
When a spring return ball valve is used in an oil drain, the operator needs to be sure of what
condition? - correct answer ✔✔ That the ball is vented.
Oil and halo carbon refrigerants are - correct answer ✔✔ Soluble and quite miscible
Most oil separators or screw compressors are multi/stage separators. The number of steps is -
correct answer ✔✔ 4
What is not a use for oil? - correct answer ✔✔ TO improve heat transfer in coils
A thermosiphon oil cooling system - correct answer ✔✔ Uses a heat exchanger to cool the oil
Which of the following is NOT true about full internal force fee oil systems on reciprocating
compressors? - correct answer ✔✔ They use oil to lower the compressor discharge temperature
signifcantly.
verified answers
Care must be taken when handling and storing oil containers that have been opened because -
correct answer ✔✔ They should be resealed as oil will absorb moisture from the atmosphere.
Oil in screw compressors have 4 separate functions in refrigeration systems. They are - correct
answer ✔✔ Lubrication, sealing, cooling, and cleaning
Is oil heavier or lighter than liquid ammonia? - correct answer ✔✔ Heavier
When a spring return ball valve is used in an oil drain, the operator needs to be sure of what
condition? - correct answer ✔✔ That the ball is vented.
Oil and halo carbon refrigerants are - correct answer ✔✔ Soluble and quite miscible
Most oil separators or screw compressors are multi/stage separators. The number of steps is -
correct answer ✔✔ 4
What is not a use for oil? - correct answer ✔✔ TO improve heat transfer in coils
A thermosiphon oil cooling system - correct answer ✔✔ Uses a heat exchanger to cool the oil
Which of the following is NOT true about full internal force fee oil systems on reciprocating
compressors? - correct answer ✔✔ They use oil to lower the compressor discharge temperature
signifcantly.
