When the burners ignite, the burner flame is normal until the blower starts. At this time, continuous roll out occurs. What is the problem?
What will be an ideal response?
a hole in the heat exchanger causing air from the blower to build pressure in the heat exchanger
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One mole of gas in a closed system undergoes a four-step thermodynamic cycle. Use the data given in the following table to determine numerical values for the missing quantities indicated by question marks. 
What will be an ideal response?
A glitch is when the car stumbles when first accelerated.
Answer the following statement true (T) or false (F)
The most common family of ICs using NPN transistors is called
A) TTL. B) CMOS. C) DTL. D) RTL.
Why is it advantageous to maintain a positive pressure in a building?
A) To reduce drafts B) To reduce exfiltration C) To minimize system ventilation heat load D) To simplify system fan and duct design