When the connection of a meter to the circuit changes the entire circuit operation, this is known as the _____ effect.
A. impedance
B. hatching
C. crossing
D. loading
Answer: D
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Answer the following statement(s) true (T) or false (F)
1. An I-V curve represents all possible voltage and current operating points for a specific set of conditions. 2. Most sine wave inverters use harmonics to generate the sine wave output. 3. The stand-alone off-grid inverter application involves the energy source supplying a charge controller and batteries supplying DC to the inverter. 4. Maximum power is transferred from the source to the load when the load inductance is equal to the internal source inductance. 5. Maximum power is transferred from the source to the load when the load inductance is equal to the internal source inductance.
Which of the following events prompted the Mormons to abandon their settlement at Nauvoo, Illinois and set out West to the valley of the Great Salt Lake?
A. Continuing vicious hostility by non-Mormon Americans including the murder of Mormon leader Joseph Smith and his brother B. A vision by the Mormon angel Moroni to Brigham Young of a peaceful, bountiful, and safe refuge in the valley of the Great Salt Lake C. The expectation that a lush, easily arable western environment awaited the Mormons in present-day Utah, which would not require or expensive and technologically sophisticated irrigation to grow crops D. A generous land grant by the federal government E. All of these choices are correct.
An example of a power consuming device would be a(n) ____ while an example of a non-power consuming device would be a(n) ____.
A. single-pole single-throw switch, light bulb B. light bulb, electric motor C. electric motor, light bulb D. light bulb, single-pole single-throw switch
What advantage is there to maintaining a negative pressure on the heat exchanger?
A) The negative pressure helps draw in return air from the house, increasing efficiency. B) Combustion air can only be drawn into the oil burner if a negative pressure is maintained. C) The vent will not work unless the heat exchanger is at a negative pressure. D) Safety; it ensures combustion products do not leak out into the air stream.