Which type of control system can more easily control multiple indoor coils?
A) Relay logic system B) Hybrid pneumatic electromechanical system
C) Line-voltage control system D) Communicating system
[Ques. 2] What is the usual setting for the limit on the fan/limit switch of a warm air furnace?
A) 180F to 200F B) 250F to 300F C) 120F to 150F D) 80F to 100F
[Ques. 3] A strange high-pitched squeal coming from a flake ice machine with a low production of soft, mushy ice is an indication of:
A) A dirty evaporator. B) A bad auger motor bearing.
C) A bad compressor. D) A failing water recirculation pump.
[Ques. 4] An electric furnace operates, but produces less heat than it used to produce. Which of the following could NOT be the cause?
A) A bad transformer B) An open fusible link
C) A bad sequencer coil D) An open strip heater
[Ques. 5] The ________ popularity of communicating systems lies in their ability to ________ overall system efficiency and comfort by matching the system capacity to the heat load.
A) increasing; decline B) decreasing; improve
C) decreasing; decline D) increasing; improve
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