Why are pipe threads tapered?

What will be an ideal response?


The taper allows pipe threads to tighten and seal.

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What mechanism is used to keep the cylinder and movable contacts stationary until the handle of the drum controller is moved by the operator?

What will be an ideal response?

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Knife valves are used for _____.

a. waste lines and low-pressure applications b. delicate flow control c. high-pressure applications d. steam systems

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This individual was the leading proponent of a zoo in Philadelphia

a. Carl Hagenbeck b. Benjamin Franklin c. Alexander the Great d. Dr. William Camac

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Why would a preheat coil be used on the energy-recovery wheel?

A) To dry the intake air B) To warm the exhaust air C) To prevent moisture transfer to the supply air D) To prevent frost from forming on the wheel

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