What type of boiler is most commonly used in the process industries?

A. Water tube
B. Waste heat
C. Fire tube
D. Steam tube


A. Correct. Water tube boilers are a common type of boilers.
B. Incorrect. Water tube boilers are a common type of boilers.
C. Incorrect. Water tube boilers are a common type of boilers.
D. Incorrect. Steam tube is not a type of boiler.

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Sometimes the shielding gas is referred to as the shielding ____________________.

Fill in the blank(s) with the appropriate word(s).

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What is a subroutine?

What will be an ideal response?

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What effect does slowing down the blower speed have on a heating unit?

A) It decreases the air temperature rise. B) It does not affect the unit temperature. C) It causes return-air temperature to increase. D) It increases the air temperature rise.

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Relay ladder logic and ladder logic for a PLC program are similar because the output symbols and control logic are on a rung, but different because the PLC ladder never has field device switch contacts located in it

Indicate whether the statement is true or false

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