Which terminal is responsible for the compressor?

Which terminal is responsible for the compressor?
 
  A) W terminal B) O/B terminal C) Y terminal D) G terminal

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[Ques. 2] What pressure units are used for measuring duct pressures?
 
  A) Inches of mercury B) Inches water column
  C) Psig D) Psia

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[Ques. 3] Too much primary air or will cause:
 
  A) Flame rollout. B) Delayed ignition.
  C) The high limit to open. D) Higher-than-normal temperature rise.

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[Ques. 4] The HVACR technician's role in indoor air quality is to:
 
  A) Perform laboratory tests on collected material.
  B) Install HEPA filters to alleviate all indoor air-quality concerns.
  C) Communicate with the building owner and the occupants on how the interacting systems of a building affect indoor air quality.
  D) Perform microscopic analysis to determine the origin of pollutants.

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[Ques. 5] When does the temperature differential initiate the defrost cycle?
 
  A) When the air temperature drops below the coil temperature
  B) When the coil and air temperature difference increases for a prolonged period of time
  C) When the difference between the coil and outdoor air is constant
  D) When there is any frost on the coil