A(n) __________-colored switch cover is used to identify an oil burner safety switch.
a. orange
b. red
c. blue
d. yellow
b. red
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Commercial and industrial air-cooled packaged units can be mounted on the outside of a structure on ground level and through an air delivery system supplying conditioned air to the structure.
Answer the following statement true (T) or false (F)
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The use of crop rotation helps lessen the damaging effects from insects
Indicate whether the statement is true or false
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The ratio of standard hours of work produced to hours actually worked is called:
A) utilization. B) effectiveness. C) efficiency. D) up-time.
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Specific gravity is the weight of a metal compared to the weight of _____
a. one square foot of dry sand b. one square foot of water c. an equal volume of dry earth d. an equal volume of water
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