A heat pump outdoor unit is installed:

A heat pump outdoor unit is installed:
 
  A) Directly on the ground.
  B) On a concrete pad.
  C) On a raised platform above the snow line.
  D) In an excavation whose bottom is below the frost line.

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[Ques. 2] A two-pipe system should be installed with the suction at the oil pump greater than what measure?
 
  A) 6 in Hg B) 16 in Hg C) 12 in Hg D) 17 in Hg

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[Ques. 3] What are the two main types of duct-cleaning equipment being used?
 
  A) Ultraviolet units and ultrasonic particle precipitators
  B) Units that use high-velocity air and units that use sprayed cleaning compounds
  C) Units that use brushes and vacuum and units that use ultrasonic particle precipitation
  D) Large truck-mounted units and small portable units

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[Ques. 4] What are TAB contractors commissioned to do on HVACR systems?
 
  A) Perform quality control checks on a system. B) Train technicians on how to operate systems.
  C) Complete installation of the entire system. D) Calibrate test instruments.

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[Ques. 5] Suction line filters are generally designed:
 
  A) To be removed after the system is clean.
  B) To be interchangeable with liquid line driers.
  C) For biflow capability in heat pumps.
  D) To stay in the system permanently once installed.