What gauges are used for measuring duct pressure?
A) Compound gauges B) High pressure gauges
C) Vacuum gauges D) Magnehelic gauges
D
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Using sketches, explain how a steel stair's landing frame can be supported. Which one of these support methods is most commonly used?
What will be an ideal response?
The purpose of hedging is:
a. To keep the price of a commodity high b. To keep the price of a commodity low c. To control the supply of a commodity. d. To permit the supplier to change prices during shipping. e. None of the above.
Two-speed wiper motors generally use ________ to achieve the two speeds
A) Gear reduction B) Reduction gear transmission C) Speed control brushes D) Cams
What is the purpose of a current-limiting resistor in a diode circuit?
A) A current-limiting resistor is only necessary if it is reverse biased B) The resistor prevents the diode from becoming reverse-biased C) The resistor will increase the PIV rating of the diode D) A properly biased diode is like a short circuit, therefore a resistor provides a voltage drop