How much separation is commonly needed between the vent and intake pipes of a condensing furnace that
pass through a roof?
a. 24 inches
b. 12 inches
c. 6 inches
d. 3 inches
d
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____ should be located over known active geologic faults.
A. No buildings B. No more than two buildings C. Any size and type of building D. No buildings over one story
Answer the following statement(s) true (T) or false (F)
1. Sequential function chart (SFC) programming is a method of programming that is similar to designing a flowchart of your process. 2. In a sequential function chart, you program steps and transitions that are arranged like a flowchart and when executed, control your system in a proscribed order. 3. An SFC program has linear, concurrent, and looping branch sequences to control the execution of your steps. 4. A selection branch is indicated by parallel horizontal lines at the top and bottom of the branch. 5. If a transition is true, the SFC program goes to the next step; otherwise, it repeats the step above it.
The accompanying figure illustrates the preferred method of dimensioning, known as ____ dimensioning.
A. continuous B. staggered C. linear D. uniform
When AC is applied across a capacitor, a ____ phase shift exists between the circuit current and capacitor voltage.
A. 45° B. 60° C. 63.2° D. 90°