CWEA E1 Study Set with Questions and Answers, Exams of Environmental Science

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Confined Space ANSWERY ¥ A space that: -is large enough to enter and work. -has limited or restricted means for entry. -is not designed for continuous occupancy. Hot Work Permit ANSWERV V An employer's written authorization to perform work capable of providing a source of ignition. Inerting ANSWERVV A form of purging or ventilating a confined space where an inert gas (such as nitrogen, carbon dioxide or argon) is used to displace the atmosphere in a confined space to remove fire or explosion hazards. Causes oxygen levels to become unstable for re-entry. Oxygen Safe Zone ANSWERV V 19.5% to 23.5% Below 19.5=unsafe for breathing Above 23.5=explosive Leader Line ANSWERV ¥ The part or area of a drawing to which a number, note or other reference applies. They are solid lines and usually terminate in a single arrowhead. Hydraulic Term: "Resistance" ANS WERV ¥ A construction in the bore of the pipe which requires more pressure to pass the same amount of water.