To determine the number of floor joists needed in a floor frame, divide the length of the building by the ____ and add one.
a.width
b.height
c.volume
d.spacing
ANS: D
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Mortar with air content _____ by volume will weaken the bond strength of mortar mix.
A. above 12 percent B. less than 10 percent C. more than 5 percent D. between 2 and 10 percent
Which of the following describes a container used in bonsai?
A) Without drainholes B) Shallow C) About half the height of the plant D) All of the above
The subsequent problems deal with the switched RC circuit below. Assume that the capacitor has no charge to begin with, and assume that VA and VB are constant dc voltages.
A long time after the switch has been closed (i.e., the circuit is in steady state), what is the correct expression for VR, given the polarity shown?
A. VB B. VA C. VA ? VB D. 0 E. VB ? VA
Which agency requires ground fault interrupters be used when operating power tools outside?
A) OSHA B) ANSI C) UL D) EPA