What must happen before any work may be performed in a confined space?

a. Classification by a qualified individual
b. Shut off and lock out power sources
c. Completion of a hazard review
d. Installation of additional ventilation


c. Completion of a hazard review

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Information graphics are used to display numeric information, or ____________________ data, to show a relationship or trend.

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

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Which of the following is the most appropriate method to prevent over-pressurization of a large building with high pressure drop return air duct?

A) Return fan. B) Relief fans. C) Gravity dampers. D) Motor-operated dampers.

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Explain how to plant grapes once you have chosen a planting site

What will be an ideal response?

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Thermographic scan, also known as thermal imaging, must be _______________________.