When charging a refrigeration system with a near-azeotropic mixture, what must be done to prevent liquid from entering the system?

A. Charge only as a vapor through the high side.
B. Charge only liquid through the high side.
C. Charge as a liquid through the low side using a restrictor.
D. Charge as a vapor through the low side using a resistor.


Answer: C

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Moving a decimal point to the right is equivalent to multiplying the decimal by a power of ____________________.

Fill in the blank(s) with the appropriate word(s).

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The tool shown in the above figure is used to _____.



a. measure the inside diameter of tubing
b. cut copper tubing
c. make threads in tubing
d. measure thread pitch

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Early vehicles were constructed mostly of what material?

A) Cast iron B) Tin C) Steel D) Wood

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When soldering, flux should be applied to ____.

A. the male part of the joint only B. the female part of the joint only C. both the male and female parts of the joint D. none of the above

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