Pollution coming from a specific place is called _____ pollution

a. point source c. soil source
b. nonpoint source d. general source


A

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Ground fault receptacles contain ____.

a. a relay coil b. a spherical transformer c. a manual sensing circuit d. different circuitry than the circuit breaker

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From 75% to 95% of the weight of ____ electrodes is metal, whereas ____ electrodes have a maximum of 75% filler metal.

A. large diameter, small diameter B. SMAW, FCAW C. FCAW, SMAW D. small diameter, large diameter

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What refrigerant is being used in new air conditioning systems in place of R-22?

What will be an ideal response?

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Gas-fired rooftop units are normally vented through:

A) Draft hoods connected directly to the unit. B) A separate power venter. C) Double-wall vent pipe connected to the side of the unit. D) Double-wall vent pipe connected to the top of the unit.

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