system pre startup procedures Exam
Questions and Answers
Positive pressure testing of a new refrigeration system may be done:
Using litmus paper.
By filling the system with oxygen.
By filling the system with ammonia.
By filling the system with an inert gas.
By filling the system with softened water. - Answer-by filling the system with an inert gas
A sulphur candle is used to test for:
Freon leaks
Ammonia leaks
Propane
Vacuum seal
CFC leaks - Answer-ammonia leaks
Which of the following is NOT a problem associated with excessive head pressure in a
refrigeration plant?
Increased power consumption.
Decreased condenser capacity.
Reduced compressor capacity.
Over-stressed compressor parts.
Premature compressor lube-oil breakdown. - Answer-decreased condenser capacity
Which of the following statements about adding oil to a system is true?