When used with masonry or concrete walls, bar joists are welded to _____
a. anchor bolts
b. metal wall pockets
c. plates embedded in the walls
d. freestanding steel columns
c
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Which of the following tools should be used to check the operation of an installed valve rotator?
A. light nylon hammer B. dial bore gauge C. outside micrometer D. stethoscope
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True or false? The ultimate source of most of the energy we use is the sun
What will be an ideal response?
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A shock of approximately 20 to 30 mA causes ____.
A. a tingling sensation B. a painful sensation C. breathing to be stopped D. electrocution
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Which units could be used to measure pressure?
A) Newtons B) Pascals C) Watts D) Joules
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