The defrost cycle is normally terminated:
A) Based strictly on pressure to ensure safe operation for the compressor.
B) Based strictly on temperature to ensure that all the frost has melted.
C) Based strictly on defrost time to reduce the chance of sensor inaccuracy.
D) Based on either temperature, pressure, or time.
[Ques. 2] Available furnace cabinet configurations include:
A) Small, medium, and large.
B) Flame-resistant, flameproof, and explosionproof.
C) Vertical, horizontal, side-by-side, over-under, and wall mount.
D) Up-flow, down-flow, horizontal, lowboy, multiposition.
[Ques. 3] What is the approximate ventilation requirement for low-temperature, air-cooled condensing units located in indoors?
A) 165 CFM per 1,000 BTU B) 400 CFM per 1,000 BTU
C) 465 CFM per 1,000 BTU D) 200 CFM per 1,000 BTU
[Ques. 4] A furnace that is composed of a heat exchanger compartment and a blower compartment is considered:
A) A radiant heat furnace. B) A gas-fired boiler furnace.
C) A gas forced-warm-air furnace. D) An oil-fired boiler furnace.
[Ques. 5] What is commonly used to control defrost operations?
A) Defrost timer B) Door switch C) Electric heater D) Thermometer
Quick Reply
