Given a set of steps with standard-size bricks used to cover the riser and tread surfaces of a flight of concrete stairs if each tread measures 12" deep by 48" wide and each riser is 8" high, what is the area in square feet of four risers rounded to hundredths? (Refer to the diagram on page 63 in the book.)
What will be an ideal response?
10.67
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List two examples of situations where disconnecting the power to perform electrical work may create an additional or increased hazard.________________________________________________________________________
What will be an ideal response?
When hopscotch troubleshooting, follow the schematic and move the meter lead on the control side of the circuit from one control to the next, checking the voltage in and out of the control. The voltage will be ________ immediately after the control that is opening the circuit
A) 0 volts B) 240 volts C) 120 volts D) 24 volts
Sensors for the mixing valve control are located:
A) Outside the building, on the supply line, and on the boiler. B) On the supply line and on the boiler. C) Outside the building and on the supply line. D) Outside the building and on the boiler.
The flow of air in a duct should stay less than 490 ft/min to keep the air flow from being too noisy. The dining room of a house is to have a flow of 150 cu ft/min to have proper air exchange. What should be the smallest duct area going to this room? Round answer to the nearer thousandths sq ft.
Fill in the blank(s) with the appropriate word(s).