Potentiometers and rheostats differ in that:
A) potentiometers utilize linear and nonlinear tapers, while rheostats usually utilize only linear tapers.
B) potentiometers are used to vary voltages, while rheostats vary currents.
C) potentiometers utilize three terminals, while rheostats usually use only two terminals.
D) all of these.
D
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In a steep roof, the ice dam protection membrane is generally provided at the ________.
A) valley. B) hip. C) rake. D) eave. E) ridge.
According to the NFPA, under what conditions is it acceptable to reset a fire alarm remotely when it is alarming?
a. It is acceptable if the panel has redundant confirmation. b. It is acceptable if the panel has cellular phone access. c. It is acceptable if the panel was manufactured after the 2005 NFPA code. d. It is never acceptable to reset a fire alarm remotely if it is alarming
In fertilizer grade, nitrogen is listed as an element, but phosphorus and potassium are listed in their
oxide forms. Fertilizers do not actually contain the oxides but this convention is employed so ratio numbers are more uniform and easier to understand.
Indicate whether the statement is true or false.If the pitcher’s mound and home plate are apart, how much time (in seconds) does the batter have to react to a fastball?
a. 0.45 seconds b. 1 second c. 1.5 seconds d. 2 seconds