What is the most reliable form of backflow protection?
What will be an ideal response?
The air gap is the ultimate protection against backflow.
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The American Wire Gauge assigns numbers from ____; the larger the number, the smaller the wire.
a. 0 to 10 b. 0 to 28 c. 0 to 44 d. 0 to 50
1/4 + 1/6 - 1/8 = 7/____________________.
Fill in the blank(s) with the appropriate word(s).
A process load change is a change in the process environment that causes the process to move away from the set point value
Indicate whether the statement is true or false
Infiltration of cold air into a warm house during winter through the cracks around doors, windows, and other openings is a major source of energy loss since the cold air that enters needs to be heated to the room temperature. The infiltration is often expressed in terms of ACH (air changes per hour). An ACH of 2 indicates that all air in the house is replaced twice every hour by the cold air outside. Consider an electrically heated house that has a floor space of 200 m2 and an average height of 3 m at 1000 m elevation, where the standard atmospheric pressure is 89.6 kPa. The house is maintained at a temperature of 22°C, and the infiltration losses are estimated to amount to 0.7 ACH. Assuming the pressure and the temperature in the house remain constant, determine the amount of energy
loss from the house due to infiltration for a day during which the average outdoor temperature is 5°C. Also, determine the cost of this energy loss for that day if the unit cost of electricity in that area is $0.082/kWh. What will be an ideal response?