What is distance D?
What will be an ideal response?
13-7/8??
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What are some of the sources of indoor air pollution?
What will be an ideal response?
What part of an analog scale gives the most accurate reading?
A) The last 25% of the scale B) The midpoint of the scale C) The first 25% of the scale D) Typically analog meters are equally accurate across the entire scale.
How is a temperature-pressure relief valve on a hot-water boiler tested?
A) Pull the lever and look for water at outlet of discharge pipe. B) Jump the high limit and operate the burners until the pressure relief valve opens. C) Pressurize the boiler with nitrogen until the pressure relief valve opens. D) Pressure relief valves are optional, so testing is not required.
Which of the following statements about the phrase “conducting body that extends the ground connection” is not true?
A. It is defined in the NEC®. B. It is conduit or wire that extends from the point where an “earth connection” is made. C. It is an 8 ft ground rod with a resistance of 25 ohms or less. D. It is a grounding electrode consisting of the structural metal frame of a building.