Which of the following is a true statement about a steam system that uses a heat recovery flash tank?
a. High-pressure steam and high-pressure condensate can be piped out of the flash tank.
b. Hot water can be piped into and low-pressure steam piped out of the flash tank.
c. High- or medium-pressure steam condensate can be piped into the flash tank.
d. Low-pressure steam and high-pressure condensate are piped out of the flash tank.
c
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?Which of the following is true of electroslag welding?
A. ?The arc is produced below the molten flux surface. B. ?The heat for welding is produced by current transferred from the electrode to the work. C. ?The slags produced are highly conductive in a molten state. D. ?The slags must be relatively shallow to maintain the circuit.
Assuming they both have the same condenser temperature, which application requires more horsepower to produce a ton of cooling: a 0°F evaporator, or a 40°F evaporator?
A) The 0°F evaporator, because of the higher pressure difference B) The 40°F evaporator, because of its higher pressure C) The horsepower requirement is too complicated a calculation to make any valid comparison based only on evaporator and condenser temperatures. D) The horsepower requirement per ton of cooling is not affected by the evaporator temperature.
What is the height of a stud when the building has a 1/2? sheetrock ceiling, a 5/8? underlayment, a 3/4? subfloor, and an 8? ceiling height?