Because of its ability to change AC to pulsating DC, the SCR can also be used in a circuit with an AC voltage source and a DC load. What is the economic benefit to this ability?
What will be an ideal response?
High-voltage AC can be produced more cheaply and efficiently than high-voltage DC, so AC is usually used to supply the operating voltage for large DC motors.
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Nuclear reactor piping is covered under _____ of the BPVC.
a. Section I b. Section II c. Section III d. Section IV
According to a USDA survey taken in 2009, no-till acres constitute about ____ percent of the country's farmland
a. 85 c. 45 b. 65 d. 35
The space above the drop-in ceiling in a commercial building is often used:
A) As an open wire trough for the building's wiring. B) To help clean the air by allowing airborne particles to settle in the ceiling. C) As a supply air distribution system. D) As a return air plenum.
A motor enclosure that minimizes the entrance of rain and airborne particles to the electrical parts is considered
_____. a. drip-proof b. dust-proof c. sealed d. weather-protected