When using sunscreen it should have a sun protection factor of at least ________ to help protect against damage from the sun.

A. 15
B. 20
C. 25
D. 30


Answer: D

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The best mowing height for St. Augustinegrass depends on the cultivar that is grown, but most are cut to_________ inches

A) 0.5 to 1.0 B) 1.0 to 1.5 C) ?2 to 4 D) 3.5 to 4.5

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The water quality required to maintain the water level in the sump is called ____________________.

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

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The ac value that is equal to the same dc heating effect is usually called:

A) rms value. B) average value. C) peak value. D) heat value.

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Hot-surface igniters typically operate on:

A) 10,000 V. B) 240 V. C) 24 V. D) 120 V.

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