The maximum safe concentration of carbon dioxide (CO2) in an occupied space is _____
a. 900 ppm
b. 1,000 ppm
c. 1,200 ppm
d. 1,500 ppm
b
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What is a power filter, and what is the advantage of using one?
What will be an ideal response?
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The thermostat jiggle valve should be placed ________ when installing the new thermostat
A) At the bottom B) Aligned with the timing mark C) Lengthwise D) At the top
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Why have some digital meters added an analog sliding scale?
What will be an ideal response?
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This question has four possible answers listed below and only one of them is correct. If you select one at random, what is the probability that you pick the correct answer?
a. 0.75 b. 0.50 c. 0.25 d. 0.10
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