The properties of this material can be altered by changing the carbon content.
a. alloy cast iron
b. malleable cast iron
c. nodular cast iron
d. steel
d. steel
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In a flexible gate valve, the best way to prevent water from collecting in the body neck is _____.
a. allowing long rest periods b. using a gate valve to regulate flow c. restricting flow to the valve slowly when shutting the system down d. following correct warming-up procedures
Answer the following statement(s) true (T) or false (F)
1. Because of the skin effect, there is more useful copper conducting area with alternating current. 2. The impedance section of each circuit considered consists of a reactor having a relatively large inductive reactance compared to the effective resistance. 3. A large Q is desirable because it means that the useful inductive reactance is high and the effective resistance is low. 4. A low value of Q means that the resistance component is relatively low. 5. Reactors that have a high Q value are often treated as pure inductors, and the amount of wire resistance is ignored because it is such a small part of the total impedance of the coil.
Identify the polygon as
a. equilateral, equiangular, or regular.
b. a quadrilateral, a pentagon, a hexagon, or an octagon.
?
Fill in the blank(s) with the appropriate word(s).
A SPST switch is used to control one circuit
Indicate whether the statement is true or false