AALAS Laboratory Animal Technician
Comprehensive Occupational Health and
Safety Exam Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download
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Section 1: Physical Hazards, Ergonomic Safety, and Facility
Engineering Controls
1. Which federal agency enforces standards that mandate employers
to provide a workplace free from recognized hazards causing or
likely to cause death or serious physical harm?
A) National Institutes of Health (NIH)
B) Occupational Safety and Health Administration (OSHA)
C) United States Department of Agriculture (USDA)
D) Centers for Disease Control and Prevention (CDC)
Answer: B) Occupational Safety and Health Administration
(OSHA)
Rationale: OSHA is the federal agency responsible for setting and
enforcing protective workplace safety and health standards under the
Occupational Safety and Health Act, specifically enforced through
provisions like the General Duty Clause.
2. When lifting heavy cages or bulk feed bags in the vivarium, which
physical technique reduces the likelihood of lower back injuries?
,A) Bending at the waist while keeping legs straight
B) Lifting with the back muscles while twisting at the torso
C) Bending at the knees and holding the load close to the body
D) Jerking the load upward rapidly to use momentum
Answer: C) Bending at the knees and holding the load close to the
body
Rationale: Proper lifting mechanics mandate maintaining the natural
curve of the spine, bending at the knees to engage the powerful
quadriceps and gluteal muscles, and keeping the center of gravity close
to the body load to minimize lumbar spinal compression forces.
3. What is the minimum continuous noise exposure level at which
OSHA mandates an employer-sponsored Hearing Conservation
Program for personnel?
A) 60 dBA time-weighted average
B) 75 dBA time-weighted average
C) 85 dBA time-weighted average
D) 105 dBA time-weighted average
Answer: C) 85 dBA time-weighted average
Rationale: OSHA requires employers to implement an effective
Hearing Conservation Program whenever worker noise exposure
equals or exceeds an 8-hour time-weighted average (TWA) sound level
of 85 decibels measured on the A-scale (dBA).
4. Which area of the vivarium typically presents the highest sustained
ambient noise levels capable of causing auditory damage over
prolonged exposure?
,A) Rodent housing rooms
B) Cage wash area
C) Procedure rooms
D) Barrier airlocks
Answer: B) Cage wash area
Rationale: The cage wash area routinely exhibits elevated noise levels
due to high-pressure water sprayers, automated rack washers,
mechanical blowers, bottle filling stations, and the metal-on-metal or
plastic scraping associated with handling animal caging.
5. What type of physical hazard is represented by pressurized gas
cylinders used for anesthesia machines or euthanasia chambers?
A) Chemical carcinogen
B) High-energy mechanical and physical projectile hazard
C) Radioisotope emission
D) Biological safety level 3 agent
Answer: B) High-energy mechanical and physical projectile hazard
Rationale: Compressed gas cylinders store stored energy under
extreme pressure. If a cylinder valve snaps off due to mechanical
impact or unchained tipping, the sudden release of kinetic energy can
turn the cylinder into an unguided projectile.
6. In a vivarium, repetitive strain injuries (RSIs) such as carpal tunnel
syndrome are most commonly associated with which daily task?
A) Reviewing water quality logs on a computer terminal
B) Changing rodent cages using forceps and manual dumping
, C) Performing daily physical health checks on non-human primates
D) Reading temperature and humidity sensors in hallway corridors
Answer: B) Changing rodent cages using forceps and manual
dumping
Rationale: Repetitive wrist flexion, extension, pinching motions with
forceps, and forceful manual dumping of dirty bedding over thousands
of cages per week generate microtrauma to tendon sheaths and
median nerve compression in the wrist.
7. Which safety device is essential when operating an autoclave to
prevent severe thermal or steam burn injuries?
A) High-efficiency particulate air (HEPA) mask
B) Heat-resistant, heavy-duty gauntlet gloves
C) Splash-proof chemical safety goggles
D) Lead-lined aprons
Answer: B) Heat-resistant, heavy-duty gauntlet gloves
Rationale: Autoclaves utilize high-pressure saturated steam reaching
temperatures of 121°C (250°F) or higher; heat-resistant gauntlet
gloves protect the hands, wrists, and forearms from thermal burns
caused by superheated steam and scalding metal carts.
8. What primary mechanical safety control prevents injuries from
pinch points and rotating components in automated cage washers?
A) Manual emergency shutoff valves
B) Door interlock switches
C) Audible start-up alarms
Comprehensive Occupational Health and
Safety Exam Questions And Correct
Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download
Section 1: Physical Hazards, Ergonomic Safety, and Facility
Engineering Controls
1. Which federal agency enforces standards that mandate employers
to provide a workplace free from recognized hazards causing or
likely to cause death or serious physical harm?
A) National Institutes of Health (NIH)
B) Occupational Safety and Health Administration (OSHA)
C) United States Department of Agriculture (USDA)
D) Centers for Disease Control and Prevention (CDC)
Answer: B) Occupational Safety and Health Administration
(OSHA)
Rationale: OSHA is the federal agency responsible for setting and
enforcing protective workplace safety and health standards under the
Occupational Safety and Health Act, specifically enforced through
provisions like the General Duty Clause.
2. When lifting heavy cages or bulk feed bags in the vivarium, which
physical technique reduces the likelihood of lower back injuries?
,A) Bending at the waist while keeping legs straight
B) Lifting with the back muscles while twisting at the torso
C) Bending at the knees and holding the load close to the body
D) Jerking the load upward rapidly to use momentum
Answer: C) Bending at the knees and holding the load close to the
body
Rationale: Proper lifting mechanics mandate maintaining the natural
curve of the spine, bending at the knees to engage the powerful
quadriceps and gluteal muscles, and keeping the center of gravity close
to the body load to minimize lumbar spinal compression forces.
3. What is the minimum continuous noise exposure level at which
OSHA mandates an employer-sponsored Hearing Conservation
Program for personnel?
A) 60 dBA time-weighted average
B) 75 dBA time-weighted average
C) 85 dBA time-weighted average
D) 105 dBA time-weighted average
Answer: C) 85 dBA time-weighted average
Rationale: OSHA requires employers to implement an effective
Hearing Conservation Program whenever worker noise exposure
equals or exceeds an 8-hour time-weighted average (TWA) sound level
of 85 decibels measured on the A-scale (dBA).
4. Which area of the vivarium typically presents the highest sustained
ambient noise levels capable of causing auditory damage over
prolonged exposure?
,A) Rodent housing rooms
B) Cage wash area
C) Procedure rooms
D) Barrier airlocks
Answer: B) Cage wash area
Rationale: The cage wash area routinely exhibits elevated noise levels
due to high-pressure water sprayers, automated rack washers,
mechanical blowers, bottle filling stations, and the metal-on-metal or
plastic scraping associated with handling animal caging.
5. What type of physical hazard is represented by pressurized gas
cylinders used for anesthesia machines or euthanasia chambers?
A) Chemical carcinogen
B) High-energy mechanical and physical projectile hazard
C) Radioisotope emission
D) Biological safety level 3 agent
Answer: B) High-energy mechanical and physical projectile hazard
Rationale: Compressed gas cylinders store stored energy under
extreme pressure. If a cylinder valve snaps off due to mechanical
impact or unchained tipping, the sudden release of kinetic energy can
turn the cylinder into an unguided projectile.
6. In a vivarium, repetitive strain injuries (RSIs) such as carpal tunnel
syndrome are most commonly associated with which daily task?
A) Reviewing water quality logs on a computer terminal
B) Changing rodent cages using forceps and manual dumping
, C) Performing daily physical health checks on non-human primates
D) Reading temperature and humidity sensors in hallway corridors
Answer: B) Changing rodent cages using forceps and manual
dumping
Rationale: Repetitive wrist flexion, extension, pinching motions with
forceps, and forceful manual dumping of dirty bedding over thousands
of cages per week generate microtrauma to tendon sheaths and
median nerve compression in the wrist.
7. Which safety device is essential when operating an autoclave to
prevent severe thermal or steam burn injuries?
A) High-efficiency particulate air (HEPA) mask
B) Heat-resistant, heavy-duty gauntlet gloves
C) Splash-proof chemical safety goggles
D) Lead-lined aprons
Answer: B) Heat-resistant, heavy-duty gauntlet gloves
Rationale: Autoclaves utilize high-pressure saturated steam reaching
temperatures of 121°C (250°F) or higher; heat-resistant gauntlet
gloves protect the hands, wrists, and forearms from thermal burns
caused by superheated steam and scalding metal carts.
8. What primary mechanical safety control prevents injuries from
pinch points and rotating components in automated cage washers?
A) Manual emergency shutoff valves
B) Door interlock switches
C) Audible start-up alarms
