Which of the following is a pressure difference that causes gases or air to flow through a chimney, vent, flue, or appliance?

a. draft
b. dilution air
c. natural draft
d. mechanical draft


ANSWER: a

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The term ____________________ refers to the New Stone Age

Fill in the blank(s) with correct word

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Water hammer can produce a pressure rise in pounds per square inch of up to how many times the water flow rate?

What will be an ideal response?

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People don't learn appropriate behavior by observing the behavior of significant role models

Indicate whether the statement is true or false

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Thermal shrinking acting on a heat-affected zone that has become embrittled is a common cause of _____

a. toe cracks b. undercut c. porosity d. underbead cracking

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