To avoid electrical shock, what class fire extinguisher should be used on electrical equipment?
A) Class D B) Class B C) Class C D) Class A
C
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A(n) ____________________ is a refrigerated area that is conditioned by a mechanical refrigeration system.
Fill in the blank(s) with the appropriate word(s).
Answer the following statement(s) true (T) or false (F)
If the total rise is 57” for a set of stairs the largest possible unit rise is 7 1/8”.
False wipes in an automatic wiper system are usually the result of a foreign material on the windshield or from flaws in the windshield that interfere with the system optics.
Answer the following statement true (T) or false (F)
The lens equation says that if an object is placed at a distance p from a lens, and an image is formed at a distance q from the lens, then the focal length f satisfies the equation 1/f = 1/p + 1/q. Assume that p = 2.3 ± 0.2 cm and q = 3.1 ± 0.2 cm.
a. Estimate f, and find the uncertainty in the estimate. b. Which would provide a greater reduction in the uncertainty in f: reducing the uncertainty in p to 0.1 cm or reducing the uncertainty in q to 0.1 cm?