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An air-purifying respirator should be changed __

unistudentguy

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An air-purifying respirator should be changed __

An air-purifying respirator should be changed __

a. after every eight-hour work shift
b. after 24 hours of total use
c. when the wearer detects any taste or smell
d. three days after the filter cartridge is installed

[Ques. 2] How close should a high vacuum/low volume exhaust inlet be located to the source of welding fumes?

a. 2 to 4 (5 to 10 cm)
b. 6 to 8 (15 to 20 cm)
c. 12 to 14 (30 to 36 cm)
d. At least 12 feet (3.66 meters) away

[Ques. 3] Treads for exterior wood stairways are typically made from pressure-treated stock with a nominal thickness
of _____.

a. 1
b. 1-1/2
c. 2
d. 2-1/4

[Ques. 4] Treads and risers for service stairways are commonly made from yellow or white pine, fir, or _____.

a. plywood
b. oak
c. poplar
d. medium-density fiberboard

[Ques. 5] To make sure that a riser will fit snugly, ____

a. cut just inside the marked line
b. cut on the marked line
c. cut just beyond the marked line
d. cut 1/16 outside the marked line and use a wood rasp to adjust the length

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