Which of these is true about hazardous materials:

a. Any truck carrying any amount of hazardous materials must have placards.
b. Any public road allows trucks, carrying hazardous materials if they are loaded correctly.
c. All hazardous materials present health and safety danger.


c. All hazardous materials present health and safety danger.

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Una CMU estándar, incluida la unión de mortero, tiene una altura de _____.

a. 6" b. 7" c. 8" d. 9"

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Which tool should not be used when trying to remove a fastener?

A. Box-end wrench B. Socket C. Open-end wrench D. Penetrating oil

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With what must the nozzle spray pattern be compatible for proper mixing?

A) mix of oil and air B) burner air pattern C) orifice D) spray angle

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Of the three pipe schedules commonly used, which has the thickest wall?

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

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