In which of these situations is it necessary to use outdoor air for combustion on an induced-draft furnace?
a. It is always necessary.
b. In locations where the outdoor temperature does not fall below 32°F.
c. When the furnace is within 50' of a living space.
d. When there are chemicals near the furnace.
d
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Operators at the local wastewater treatment plant have reported the following data to determine how well a wastewater treatment plant is operating.
a. What percentage of the BOD does the treatment plant remove?
b. Is the plant in compliance with its permit if the plant is required to remove 85% of the BOD?
What will be an ideal response?
Which size Phillips screwdriver has the largest point?
A) 3 B) 2 C) 1 D) 0
The amount of concavity in a root surface can be given as ____.
A. a percentage of the total weld width B. the smallest number and smallest size of spots per inch of weld C. a percentage of the effective throat D. a percentage of the width at the narrowest point
The amount of moisture in the air can be measured with:
A) An electronic hygrometer. B) A hot wire anemometer. C) An electronic barometer. D) A chronometric tachometer.