Organizations that test products for safety are _____.
a. CMPs
b. NFPAs
c. NRTLs
d. NELAs
c. NRTLs
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Which of the following is a possible long-term effect of exposure to indoor air pollutants?
a. Headache b. Cancer c. Eye irritation d. Drowsiness
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A(n) ____________________ is a single-phase instrument that indicates synchronism accurately.
Fill in the blank(s) with the appropriate word(s).
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In a furnace equipped with a solenoid oil flow valve, the valve will close when _____
a. there is a call for heat b. there is an oil leak c. power is removed d. the burner motor reaches full speed
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Pulley A is 42 inches in diameter, and pulley B is 24 inches in diameter. What is the ratio of the diameter of A to the diameter of B?
A. 1:1 B. 5:4 C. 3:2 D. 7:4
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