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raffat naseem raffat naseem
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6 years ago
The effects of noncondensible gases in the refrigeration system are which of the following? You may select more than one.
 
  A) Hot compressor
  B) Low-side pressure in a vacuum
  C) Increased high-side pressure
  D) Oil dilution
  E) Low capacity



[Ques. 2] What is the lowest water temperature required for effective radiant floor heating?
 
  A) 75F to 90F B) 90F to 105F C) 105F to 120F D) 60F to 75F



[Ques. 3] How can a range of heating capacities be achieved with the same burner?
 
  A) Using shorter cycles B) Changing the nozzle
  C) Moving the furnace D) Moving the oil storage tank



[Ques. 4] How are motorized dampers controlled when they are used as bypass dampers?
 
  A) A pressurestat measures the static pressure across the blower.
  B) They are wired in parallel with the zone dampers.
  C) They are wired in series with the zone dampers.
  D) They are wired using the G terminal on the master thermostat.



[Ques. 5] Rectangular sheet metal ducts are joined together using:
 
  A) Mastic. B) S-locks and drives cleats.
  C) Duct tape. D) Flanges and bolts.
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evyanevyan
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6 years ago
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raffat n. Author
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6 years ago
So smart
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