What causes flue gas condensation?
A) The flue gas is cooled below the dewpoint of the combustion gas.
B) Operating the furnace during times of high relative humidity
C) Water naturally condenses on metal surfaces.
D) Cold air being pulled through the vent on the off cycle drops the vent temperature below the dewpoint of the surrounding air.
A
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____ is the amount of energy required to raise the temperature of any substance 1°F.
A. Thermal state B. Specific heat C. Temperature D. Heat
?What kind of hazard is ionizing, ultraviolet, microwave, or thermal radiation?
A. ?biomechanical B. ?physical C. ?electrical D. ?chemical
Stolons are:
A. compressed underground stems. B. stems that grow horizontally above ground. C. large, fleshy above ground stems. D. stems that grow horizontally below ground.
When an AC voltage is supplied to an RC circuit, the AC's current and amplitude will be:
A) leading the voltage. B) varying in the same manner. C) similar in waveform. D) all of these.