IAQ problems are generally judged to be worse when ambient room temperature is above _____
a. 80°F
b. 78°F
c. 75°F
d. 68°F
c
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Answer the following statement(s) true (T) or false (F)
1. Small DC motors can be connected directly across the line for starting. 2. Magnetic across-the-line control of small DC motors is very different from AC control. 3. DC arcs are greater than those due to AC.
The NEC® specifies the minimum radius of conduit bends because _____.
a. installation of additional pull boxes is more efficient b. bending equipment cannot produce tighter bends c. the insulation on conductors could be damaged as it is pulled d. the internal diameter of the conduit may be increased
For the nonconventional net cash flow shown, determine the external rate of return using the MIRR method at a borrowing rate of 10% per year and an investment rate of (a) 15% per year, and (b) 30% per year.
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Why are single-element fuses particularly suited for the protection of circuit breakers with low interrupting
ratings? a. They have a high speed of response to overcurrents. b. They have a low speed of response to short circuit currents. c. They can be applied in circuits subject to temporary motor overload. d. They can be used in circuits other than motor branch circuits and feeders, such as lighting circuits.