To prevent clogging by foreign matter in the water, many backflow preventers _____.
a. have replaceable filter cartridges
b. are designed to be backwashed
c. are equipped with strainers
d. include sediment-settling bowls
c. are equipped with strainers
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Before he became chief justice of the Supreme Court, John Marshall's service at Valley Forge during the American Revolution convinced him
A. to support Thomas Jefferson and his republican principles. B. to give up the life of a soldier and return to law school. C. of the drawbacks of feeble central authority. D. of the futility of opposing Britain. E. of the dangers of a strong central government.
In pigs with level top lines, the hip bone, or _____ bone, is nearly parallel to the ground.
a. vulva c. aitch b. femur d. humerus
____ representing inclined surfaces are not shown in their true lengths in isometric sketches.
A. Perspective lines B. Vertical base lines C. Slant lines D. Horizontal base lines
How many 
-inch long machine bolt blanks can be cut from a 5-foot length of stock? Allow 
inch for waste on each blank.
Fill in the blank(s) with the appropriate word(s).