Mechanically held relays and contactors are often used because _____.
a. they have fewer coils than electrically held devices
b. they have more coils than electrically held devices
c. they are quieter than electrically held devices
d. they are more reliable than electrically held devices
a. they have fewer coils than electrically held devices
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What are the two effects of reducing the voltage applied to the motor?
What will be an ideal response?
____________________ are used in some applications to prevent a pin, such as a piston pin, from sliding out of position.
Fill in the blank(s) with the appropriate word(s).
Which of the following is not a trait of organic soil?
a. Light, porous, and loose b. Low in plant nutrients c. Great for production of all vegetables d. Can hold great amounts of water
The definition of sublimation is:
A) In a closed container, a substance in a liquid state remains in a liquid state regardless of the pressure inside the container. B) A substance in a gaseous state changes into a solid state while bypassing the liquid state. C) In a closed container, a substance in the liquid state boils at a higher temperature when the pressure is increased. D) A substance in a solid state changes into the gaseous state without going through the liquid state.