The pressure switch controlling the action of a control relay is a very common practice in ____ control systems.

a. home
b. public
c. industrial
d. small


c. industrial

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An ____________ emission system stores vapors from the fuel tank in a charcoal canister until certain engine operating conditions are present.

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

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A substance that causes a chemical reaction is a(n) _____

A) enzyme B) receptor C) surfactant D) fermenter

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Describe the safe practices for workers in the basket of an aerial lift

What will be an ideal response?

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Which action should be avoided when performing horizontal ventilation?

a. initiating a fire attack prior to ventilation b. use of fans or blowers c. use on a windy day d. opening upward windows first

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