Welding performed in a confined space without proper ventilation is _____ .

a. prohibited
b. acceptable
c. preferred
d. desirable


a. prohibited

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____ detectors are used where combustible materials are present.

A. Heat B. Fire flame C. Smoke D. Photoelectric

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Pistons should be chemically cleaned while assembled to the piston pin and connecting rod.

Answer the following statement true (T) or false (F)

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How do replace valve guides and what precautions should you observe?

What will be an ideal response?

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Soilless media are great sources of _____, are light in weight, and are easier to handle and ship

A) water B) air C) carbon D) sulfur

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