In a domestic freezer using R-12, if the suction pressure reading is 1.3 psig, the evaporator boiling point is ____°F.
A. +18
B. +10
C. -12
D. -18
Answer: D
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Bearing piles are classified as all of the following EXCEPT:
A. Caisson piles B. Square timber piles C. Steel piles D. Round timber piles
According to the United Nations, the world population currently uses approximately
a. 75% of the world’s resources that the planet can sustain. b. 100% of the world’s resources that the planet can sustain. c. 20% more of the world’s resources than the planet can sustain. d. 50% more of the world’s resources than the planet can sustain.
Fill in the blank(s) with the appropriate word(s).
Which of the following statements concerning standards and codes is correct?
A) Standards describe the industry's best practices. B) Codes are generally broken into five areas: electrical, plumbing, mechanical, refrigeration, and other. C) Codes are written by government agencies. D) Standards are enforced at a national level.