List two ways in which ambient light is rejected by a photoelectric system.
What will be an ideal response?
Use a polarized filter.
Modulate the transistor.
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When installing 4' × 8' subfloor panels, how far should you measure in from one side of the rim joist?
a. 2' b. 4' c. 6' d. 8'
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The longest side of a right triangle is 20 feet and the shortest side is 12 feet. How long is the third side?
a. 14 feet b. 15.5 feet c. 16 feet d. 19 feet
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This type of seal is used for heavy machinery where some leakage is permissible.
a. packing b. labyrinth seal c. O-ring seal d. felt or wool seal
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How many 2" pipes can be sourced by a 3" pipe allowing for friction?
Fill in the blank(s) with the appropriate word(s).
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