Discuss the mounting requirements of room air conditioners.
What will be an ideal response?
Room air conditioners must be mounted so that the heat extracted from the room air can be expelled to the outside and not re-circulated back into the home. Any room air conditioner that does not vent heat to the outside will not cool a room. A stream of cold air may blow from its front, but an equal or greater amount of heat is being discharged from the unit’s heat exchanger back into the room. In applications where outside venting is not possible, an ordinary fan or an evaporative cooler (in dry climates) is a better cooling option than an air conditioner.
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Four resistors are connected to a 12-volt battery source in series. The values of the resistors are 10 ohms, 100 ohms, 330 ohms, and 470 ohms. Technician A says that the greatest voltage drop will occur across the 10-ohm resistor. Technician B says that the greatest voltage drop will occur across the 470 ohm resistor. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
The two common winding configurations for three-phase motors are:
A) Rho and sigma. B) Alpha and omega. C) Wye and delta. D) Single-phase and three-phase.
Dams, highways, and bridges would be classified as what type of project?
a. Residential b. Building construction c. Industrial d. Heavy construction
Each RC network can produce up to how much phase shift?
A) +90 degrees B) +45 degrees C) -180 degrees D) -90 degrees