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
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
What refrigerant is being used in new air conditioning systems in place of R-22?
What will be an ideal response?
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.