The second number in the IP classification system designates the degree of protection against ____
a. air infiltration
b. dust
c. fire hazards
d. water
d. water
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The letters inside the triangles in Figure 2 represent the _____.
a. receptacle types
b. fixture types
c. placement of smoke detectors
d. amount of revisions on the drawing
Without using a calculator, which function is greater, csc 39.88° or csc 74.56°?
Fill in the blank(s) with the appropriate word(s).
What does the absorption cycle use to create the system pressure difference needed to produce the cooling effect?
A) The absorption cycle uses heat. B) The absorption cycle uses heat and an absorbent fluid. C) The absorption cycle uses pressure and heat. D) The absorption cycle uses pressure and an absorbent fluid.
Figure 10-3 In Figure 10-3, the loop number is ____________________.
Fill in the blank(s) with the appropriate word(s).