The push button can be adapted to produce a high at the input instead of a low by adding a(n) ____.
A. OR
B. NOR
C. NAND
D. INVERTER
Answer: D
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Answer the following statement(s) true (T) or false (F)
1. DC series motors that can run at no load may generate runaway speeds and literally throw themselves apart. 2. A drum controller was used on crane motors, elevators, machine tools, and other applications in heavy industry. 3. The reverse direction of a drum controller is accomplished by reversing the current in both the armature circuit and the shunt and series fields. 4. Three-terminal and four-terminal starting rheostats are still widely used. 5. Drum controllers are still frequently used with AC as well as DC motors.
What is a speed cover?
a. Clear plastic sheets c. Plastic-coated aluminum foil b. Preformed aluminum foil pot covers d. None of the above
Coaxial cable must be separated from electric light and power circuits by at least __________ inches. (General Rule)
a. 2 b. 3 c. 6 d. 8
If a scaffold is ________________ or more in height, fall protection must be used.
A. 6 feet B. 8 feet C. 10 feet D. 12 feet