Author Question: An air-purifying respirator should be changed __ a. after every eight-hour work shift b. after ... (Read 48 times)

Evvie72 · **on:** Jul 24, 2018

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

Question 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