A heat recovery ventilator is more energy efficient than a balanced ventilation system consisting of an exhaust blower and a supply air blower because:
A) It recovers energy from the compressor. B) It recovers energy from the attic.
C) It recovers energy from the exhaust air. D) It recovers energy from the system blower.
[Ques. 2] Ice machine cleaning and sanitizing:
A) Are separate processes required for two different solutions.
B) Are normally done by pouring chlorine bleach into the water sump.
C) Are normally both performed using a single cleaning and sanitizing solution.
D) Are necessary only in areas with hard water.
[Ques. 3] An electric furnace that does not operate, regardless of the thermostat setting, may have:
A) An open strip heater. B) A bad sequencer coil.
C) An open fusible link. D) A dirty air filter.
[Ques. 4] Communicating variable-refrigerant-velocity mini-split systems can save energy by matching the ________ capacity to the demand.
A) load B) energy's C) building's D) equipment
[Ques. 5] What effect on the building pressure does a heat recovery ventilator have?
A) It decreases building pressure.
B) It increases building pressure.
C) No effectit is a balanced system.
D) It increases building pressure on one side and decreases it on the other side.
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