Which of the following occurs as soon as a heating thermostat is closed?

a. The flame rollout switch opens.
b. The blower fan starts
c. The inducer fan starts.
d. The inducer pressure switch opens.


c. The inducer fan starts.

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What principle states that at a constant pressure the volume of a gas increases as the temperature of the gas increases?

A) Boyle's Law B) Charles' Law C) Combined Law D) Bernoulli's Principle

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What is the approximate range of frequencies (?) in human speech and their corresponding wavelengths? For all practical purposes, the speed of sound in air may be assumed = 1,000 ft/s in place of its exact value of 1130 ft/s.

What will be an ideal response?

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The first step in mediation is _____.

a. mediator selection b. arranging for private meetings between parties c. parties request or are ordered to mediation d. arranging a meeting with the mediator

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The text authors contend that "more than any other single factor, the railroad network spurred the amazing industrialization of the post-Civil War years." Do you agree? Why or why not?

What will be an ideal response?

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