Wind Turbine systems up to and including 100kW are covered under ____.
a. NEC article 682
b. NEC article 686
c. NEC article 690
d. NEC article 694
d. NEC article 694
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Which of the following is not true of a Simpson geartrain?
A. It contains two ring gears. B. It uses two separate planetary gear sets. C. It uses a common sun gear. D. It uses a common planetary pinion carrier.
The internal piston in the reversing valve is moved from one side to the other by:
A) A stepper motor. B) Pressure difference. C) A gear motor. D) Permanent magnets attached to the ends of the piston.
The expansion device in a mechanical refrigeration system _____
a. raises the temperature of the refrigerant b. acts as a heat exchanger c. provides a pressure drop d. raises the pressure of the refrigerant
What term refers to the driven yoke and the driving yoke in the same plane?
What will be an ideal response?