Why is 24V used in control circuits?
a. Components are easy to install.
b. Alternating current is not needed.
c. It allows battery back-up.
d. Electric shocks are eliminated.
a
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With ratio control, the flow of one material is uncontrolled.
Answer the following statement true (T) or false (F)
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What type of valve uses flexible, chemical-resistant, rubber-type diaphragms to control flow?
A. Plug B. Ball C. Diaphragm D. Butterfly
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Most soldering jobs in agricultural mechanics can be done with solder composed of
a. 30 percent tin, 70 percent iron c. 50 percent tin, 50 percent lead b. 40 percent copper, 60 percent steel d. 30 percent tin, 70 percent steel
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The most common roof style is the ____ roof where two sloping roof surfaces meet at the top.
a.gable b.shed c.hip d.intersecting
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