What is an air-over motor?
A) A motor that is cooled by airflow over the motor
B) A motor whose function is to blow air over the fan motor to cool it
C) A motor that is designed to be installed on the bottom of a fan unit
D) A motor that is designed for units with the fan located at the top of the unit
[Ques. 2] Which of the following condenser types is most efficient?
A) Air-cooled B) Evaporative C) Cumulative D) Water-cooled
[Ques. 3] The ideal range of relative humidity for promoting health is:
A) 10 to 20 percent. B) 50 to 70 percent. C) 30 to 60 percent. D) 75 to 100 percent.
[Ques. 4] How is the Annual Fuel Utilization Efficiency (AFUE) efficiency rating determined?
A) By using the NIST equation for 100 percent efficiency
B) By multiplying the amount of combustion air with BTU output
C) By comparing new furnace units to the efficiency of older models
D) By using the NIST equation for 100 percent efficiency minus losses
[Ques. 5] The two main types of fan drives are:
A) Magnetic drive and hydrodrive. B) Serpentine belt and chain drive.
C) Direct drive and belt drive. D) Planetary gear drive and worm gear drive.
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