Which type of space heater is generally the most expensive to operate?
A) Electric space heater B) Kerosene space heater
C) Vented gas space heater D) Unvented gas space heater
[Ques. 2] What part does heat play in combustion?
A) Heat causes combustion to end. B) Heat plays no role in combustion.
C) Heat is the catalyst of combustion. D) Heat is a byproduct of combustion.
[Ques. 3] What is a chiller?
A) A refrigeration system designed to cool refrigerant
B) A refrigeration system designed to cool beer mugs
C) A refrigeration system used to cool walk-in freezers
D) A refrigeration system designed to cool liquid
[Ques. 4] The diagnostic board on a system is flashing three short flashes, pausing, and then flashing two long flashes. This most likely is displaying:
A) A secret code known only to the designer. Manufacturers do not share their fault codes with service technicians.
B) Fault code 32.
C) The dateMarch 2.
D) The suction pressure32 psig.
[Ques. 5] The products of complete combustion of a hydrocarbon gas are:
A) Water, carbon, carbon dioxide, and carbon monoxide.
B) Carbon, carbon dioxide, and carbon monoxide.
C) Water and carbon dioxide.
D) Carbon dioxide and carbon monoxide.
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