In selecting a heating or cooling system, undersizing is generally acceptable, if it is undersized by no more than _____.

a. 5 percent
b. 10 percent
c. 15 percent
d. 20 percent


a. 5 percent

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Refer to the picture below. What is the proper name for this tool?


A) 1/2 open wrench
B) Combination wrench
C) Flare nut wrench
D) Double wrench

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These are placed at the intersection of walls and floors and are generally used to protect the wall from damage:

A. baseboards B. wainscoting C. chair rail D. cornice E. casings

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The drum of a cloth dryer is turning at a rate of 1 revolution every second when you suddenly open the door of the dryer. You noticed that it took 2.0 seconds for the drum to completely stop. Determine the deceleration of the drum. State your assumptions.

What will be an ideal response?

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What is the difference between continuous weld and plug weld?

What will be an ideal response?

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