Which of the following control valves cannot provide for variable positions over a range of 0% to 100%?
A) Pneumatic-assisted valve B) Motor driven value
C) Proportional valve D) Solenoid valve
D
You might also like to view...
The study of vegetable production is called ____________________
Fill in the blank(s) with the appropriate word(s).
Select the characteristics of a small console dehumidifier. You may choose more than one
A) Connects to duct system B) Can provide outside ventilation C) Can provide high-efficiency air filtration D) Must sit in the room being conditioned E) Does not require a drain
What is the operating principle of glass stem thermometers?
A) The fluid climbs the walls of the tube through capillary attraction, which works better at higher temperatures. B) Expansion and contraction of the fluid makes the liquid level rise and fall with temperature. C) The fluid inside the thermometer boils as it is heated, causing the liquid level to rise. D) The refractive properties of the glass stem change with temperature, making the fluid level appear higher at higher temperatures.
A very small magnet is wound with 97 layers with 215 turns per layer. How many turns of wire are on the coil?
Fill in the blank(s) with the appropriate word(s).