Window unit air conditioners are designed primarily to supply cool air to:
A) One room. B) Unconditioned attic space.
C) Unconditioned basements. D) Several rooms in a small house.
A
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A _____ includes all the work necessary to build a facility and is composed of a series of _____.
a. goal; objectives b. project; jobs c. plan; jobs d. program; costs
Answer the following statement(s) true (T) or false (F)
1. Electric heating resistors are generally made from a special type of wire called nickel. 2. People often employ light bulbs as small heaters to protect well pumps during periods of cold weather. 3. Wire wound resistors generally have the ohmic value and power rating written on the resistor. 4. Resistors in sizes ranging from 8 to 20 watts generally have their values marked with bands of color. 5. A variable resistor is a resistor whose values can be modified over a range.
On a cold day it is normal for the thermostat to stay closed for more than 15 minutes
Indicate whether the statement is true or false
What friction rate should be used to size a duct for a design friction rate of 0.12 in WC if the duct has a total equivalent length of 150 ft?
A) 0.1 in wc because that is the standard factor B) 0.12 × (150/100 ) = 0.12 × 1.5 = 0.18 in WC C) 0.12 × (100/150 ) = 0.67 × 0.12 = 0.08 in WC D) 0.12 in WC because the duct length is irrelevant