Threads that resist vibrations and remain tight without auxiliary locking devices are called ____ threads.
A. buttress
B. Acme
C. dardelet
D. rolled
E. none of the above
Answer: C
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A) concrete masonry unit. B) clay masonry underbed. C) cement mortar underbed. D) clay masonry unit. E) concrete masonry underbed.
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Match each mineral to the disorder it helps prevent
a. calcium c. iron b. iodine d. fluorine 12. rickets 13. anemia 14. goiter 15. poor teeth
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A meter that uses a moving pointer or needle to indicate a value on a scale is called a(n) __________ meter.
a. LCD b. analog c. digital d. parallax
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Concrete from a central mix plant is _____.