Which of the following is NOT a problem associated with excessive head pressure in a refrigeration plant?
a. increased power consumption
b. decreased condenser capacity
c. reduced compressor capacity
d. over-stressed compressor parts
e. premature compressor lube-oil breakdown
Answer: B
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Power Engineering Chapter 121
- Oil added to refrigeration compressors
- When charging a refrigeration system it
- Charging a refrigeration system
- A sulphur candle is a test for
- Which of the following is not a recommended step for the procedure in which dry nitrogen is used for a system leak test?
- Leak testing on a refrigeration system
- Positive pressure testing of a new refrigeration system may be done
- The initial refrigerant charge is added to
- When initially charging a refrigeration system:
- The refrigerant liquid charging valve connection is:
- When using lighted sulphur candles to test for ammonia leaks in a refrigeration system, the presence of ammonia will be indicated by:
- Before operating a new refrigeration plant, or one in which piping alterations have been made, the system must be tested for:
- Which of the following statements about adding oil to a system is true?
- Which of the following statements about manual refrigeration system purgers is false?
- The liquid line shutoff valve of a refrigeration system is:
- What can cause a high discharge pressure in a refrigeration system?
- It is very important to slowly open oil drain valves and plugs in the crankcase for which of the following reasons?