Where is the 120/208-volt wye system commonly used?
What will be an ideal response?
The 120/208-volt wye system is commonly used in schools, stores, and offices.
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Two technicians are discussing vacuum brake boosters. Technician A says that when the engine is running and the driver's foot is off the brake pedal, a vacuum is present on both sides of the booster diaphragm. Technician B says that when the brakes are in the applied position, vacuum is present on the front side of the diaphragm. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
What type of fan is used in most air-cooled condensing units?
A) A draw-through centrifugal fan B) A draw-through propeller fan C) A blow-through centrifugal fan D) No fan—most condensing units are natural draft.
Which of the following is true?
A) our current telecommunications network uses copper wire, fiber optic glass strands, and air waves to transport information B) several different medium types may often be used to carry a single piece of information across a network C) every medium has an information "carrying capacity" D) all of the above
What condition in the internal combustion engine will result in elevated nitrogen oxide (NOX) levels?
What will be an ideal response?