What factors must be controlled to achieve acceptable indoor air quality?
A) Chemical pollutants, biological pollutants, and ventilation
B) Temperature, humidity, velocity, and pollutant level
C) Air ventilation, filtration, and distribution
D) Building pressure, infiltration, and ventilation
[Ques. 2] What is the difference between a standard and a code?
A) Codes often carry the force of law.
B) Codes are a description of best current practices.
C) Codes and standards are two terms for the same thing.
D) Standards are written to be adopted as laws.
[Ques. 3] A two-way control valve reduces the flow through the coil by:
A) Sending some of the flow backwards in the direction it came from.
B) Closing and reducing the flow through the circuit.
C) Opening and closing in pulses to vary the flow.
D) Allowing some of the flow to bypass the coil.
[Ques. 4] How is heat pump Heating Seasonal Performance Factor, HSPF, calculated?
A) HSPF is the ratio of heat output divided by heat input measured at one particular condition.
B) HSPF is the ratio of heat output divided by heat input averaged for the entire heating season.
C) HSPF is a measure of heating BTU per watt measured at one particular condition.
D) HSPF is a measure of heating BTU per watt averaged for the entire heating season.
[Ques. 5] What regulates the draft through the heat exchanger and prevents downdrafts from blowing into the heat exchanger on natural-draft gas furnaces?
A) The draft diverter B) The draft regulator
C) The barometric damper D) The induced draft blower
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