3-32. A worker should wear double hearing
protection when working around noise
sources above what prescribed sound
l e v e l?
1. 94 dB
2. 100 dB
3. 104 dB
4. 140 dB
3-33. When protective devices do not provide
noise reduction to a level below 84
dB, which of the following actions
should be taken?
1. Secure noisy equipment
2. Reduce exposure time
3. Remove personnel from the area
4. Reduce the number of personnel
operating equipment
3-34. Supervisors and visitors who are in
the vicinity of eye-hazardous
operations are required to wear
protective equipment,
1. True
2. False
3-35. In areas where personnel may be
exposed to corrosive materials, which
of the following items must be
available?
1. Protective eyewear
2. Eyewash facilities
3. Warning signs
4. Each of the above
3-36. Personnel just passing through an eye
hazard area do NOT need eye protection
as long as they keep moving.
1. True
2. False
3-37. Which of the following contaminants is
formed from condensation of vaporized
s o l i d s?
3-38. Which of the following contaminants
results from the incomplete
combustion of coal, wood, and oil?
1. Fumes
2. Dust
3. Smoke
4. Mist
3-39. Fine liquid droplets suspended in air
by condensation or atomization will
cause which of the following
contaminants?
1. Fumes
2. Dust
3. Smoke
4. Mist
3-40. Small solid particles created by the
breaking up of larger particles by
machine shop tools will cause which
of the following contaminants?
1. Fumes
2. Dust
3. Smoke
4. Mist
3-41. Which of the following methods
affords the best personnel protection
from industrial respiratory hazards?
1. Exhaust ventilation systems
2. Airtight working spaces
3. Surgical masks
4. Respirators
3-42. When, if ever, would a surgical mask
be considered as adequate for
industrial respiratory protection?
1. During fueling operations
2. While using cleaning solvents
3. While spray painting
4. Never
3-43. An air-purifying type of respirator
can be used in a space that has
insufficient oxygen.
1. Fumes
2. Dust
3. Smoke
4. Mist
17
1. True
2. False
