When comparing duct materials, none have a lower friction rate or are as durable as:
A) Ductboard. B) Flex duct. C) Sheet metal. D) Fiberboard.
C
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Receptacles must be installed so that no point measured horizontally along the floor line in any wall space is more than ____ feet from a receptacle outlet.
a. 2 b. 4 c. 6 d. 12
The excitation current should be connected to the rotor only after it has accelerated to a speed that is close to synchronous speed.
Answer the following statement true (T) or false (F)
An oil furnace heat exchanger is built:
A) Like a drum. B) Like a clamshell. C) Like a tube in a serpentine shape. D) Oil furnaces do not require heat exchangers.
When atoms join to make a new molecule:
A) The electrons and protons swap position. B) The nucleus of the larger atom absorbs the smaller atom. C) Energy is absorbed or released in the process. D) They become one large atom.