Refrigerant identifies are used to test the purity of refrigerant in an air conditioning system. What would be the minimum acceptable level of purity?

A. 100%
B. 99%
C. 98%
D. 97%


Answer: C

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What Paccar series engines are built on Cummins engines of equivalent displacements?

A. MX-Series B. PX-Series C. ISX-Series D. MP-Series

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The recommended voltage drop for a branch circuit is ____ % or less.

A. 1 B. 5 C. 3 D. 7

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The relationship between magnetic and electrical effects is referred to as the Edison effect

Indicate whether the statement is true or false

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Which of the following is not a part of a stuffing box seal?

A. the packing chamber B. the packing slot C. the packing rings D. the stuffing glands

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