A time-proportioning controller with a DC output voltage of 10 volts will produce an average voltage of 5 volts if it is switched ON for ____________________ percent of the time and OFF for ____________________ percent of the time.
Fill in the blank(s) with the appropriate word(s).
50, 50
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How many expansion springs should be installed in the banding on a hot vessel with an insulated circumference of 50' (15.2 m)?
a. None are required. b. 1 c. 2 d. 3
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Flowers begin to _________as soon as they are cut
A) decay B) bloom C) grow D) reproduce
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The pin or valve port piston of the electronic step-motor expansion valve can move in a linear motion of 0.0000783 in./step.
Answer the following statement true (T) or false (F)
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How many Btus must be removed from one pound of water at 200°F for it to end up as ice at 30°F?
A. 144 Btu B. 828 Btu C. 313 Btu D. 526 Btu
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