If flue gas temperatures in a gas fired boiler go below 300°F, what is a possible consequence?

A) Reduced efficiency.
B) Condensation of moisture.
C) Change in flue gas color.


B) Condensation of moisture.

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?Which saturated hydrocarbons molecule contains three carbon atoms?  

A. ?butane B. ?propane C. ?methane D. ?octane

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_____ is a factor over which humans can exert a great deal of control by being good stewards of the land

a. Overpopulation b. Pollution c. Reproductive capability d. Biological surplus

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Employees are more likely to be committed to the work that they do if _______

A) Are afraid of loosing their job B) They are assigned meaningless tasks C) They are working to their strengths D) None of the above

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The burner motor runs, but the oil pump does not produce pressure. This can be caused by

A) a defective burner motor centrifugal switch B) a defective oil pump drive coupling C) a plugged oil nozzle D) a defective ignition transformer

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