AALAS LABORATORY ANIMAL TECHNICIAN (LAT)
CERTIFICATION EXAM | QUESTIONS AND 100%
CORRECT ANSWERS WITH RATIONALES | LATEST
UPDATE GRADED A+
1. What is the primary purpose of the Institutional Animal Care and Use Committee
(IACUC)?
A. To conduct research on animals
B. To oversee and ensure humane treatment of laboratory animals
C. To provide veterinary care only
D. To handle animal procurement
Answer: B
Rationale: The IACUC ensures that all animal research is conducted ethically and in
compliance with federal regulations.
2. Which species is considered a non-rodent commonly used in laboratory research?
A. Rat
B. Rabbit
C. Mouse
D. Hamster
Answer: B
Rationale: Rabbits are non-rodent species frequently used in labs for research, while rats,
mice, and hamsters are rodents.
3. What is the normal body temperature range for a healthy adult laboratory mouse?
A. 28–30°C
B. 36–38°C
C. 40–42°C
D. 32–34°C
Answer: B
Rationale: Healthy mice maintain a body temperature of approximately 36–38°C.
4. Which type of cage bedding is preferred for rodents due to low dust and absorbency?
A. Sawdust
B. Corncob
C. Straw
D. Sand
Answer: B
Rationale: Corncob bedding is absorbent and produces minimal dust, making it safer for
rodent respiratory health.
,5. The term "ad libitum" in laboratory animal feeding refers to:
A. Feeding restricted amounts at specific times
B. Continuous access to food or water
C. A type of specialized diet
D. Fasting animals for experiments
Answer: B
Rationale: "Ad libitum" allows animals free access to food or water at all times.
6. What is the purpose of sterilizing surgical instruments in animal research?
A. To improve grip
B. To prevent infection
C. To make them easier to clean
D. To calibrate instruments
Answer: B
Rationale: Sterilization eliminates microbes to reduce the risk of post-surgical infections.
7. Which method is commonly used for identifying laboratory mice?
A. Ear tagging
B. Tail tattooing
C. Microchip implantation
D. All of the above
Answer: D
Rationale: Ear tags, tail tattoos, and microchips are all standard identification methods for
mice.
8. What is the primary route for administering liquids to small rodents in research?
A. Subcutaneous injection
B. Oral gavage
C. Intraperitoneal injection
D. Inhalation
Answer: B
Rationale: Oral gavage is a precise method for delivering liquids directly into the stomach of
small rodents.
9. What does PPE stand for in a laboratory animal facility?
A. Personal Protective Equipment
B. Primary Pathogen Exposure
C. Protein Processing Enzyme
D. Preventive Pest Eradication
Answer: A
Rationale: PPE includes gloves, gowns, masks, and eye protection to protect personnel from
hazards.
,10. Which sign indicates a healthy rabbit?
A. Rough coat and weight loss
B. Bright eyes, clean ears, and alert behavior
C. Labored breathing and lethargy
D. Diarrhea
Answer: B
Rationale: Healthy rabbits have smooth coats, clear eyes, clean ears, and are alert and
active.
11. What is the main purpose of quarantine for new animals in a facility?
A. To train them for research
B. To prevent introduction of disease
C. To adjust their diet
D. To acclimate them to researchers
Answer: B
Rationale: Quarantine minimizes the risk of spreading infectious agents to the existing
colony.
12. Which is a common sign of stress in laboratory mice?
A. Grooming and normal activity
B. Hunched posture, decreased activity, and ruffled fur
C. Rapid eating and drinking
D. Increased social interaction
Answer: B
Rationale: Stress often presents with hunched posture, lethargy, and poor grooming in mice.
13. Which sterilization method uses high-pressure saturated steam?
A. Dry heat
B. Autoclaving
C. Chemical sterilization
D. Filtration
Answer: B
Rationale: Autoclaving uses high-pressure steam to effectively sterilize instruments and
materials.
14. What is a cage card used for in laboratory animal rooms?
A. To identify the animal’s species and study
B. To record veterinary notes
C. To track facility cleaning schedules
D. To label feed types
Answer: A
Rationale: Cage cards provide essential information such as species, identification number,
and experimental details.
, 15. How often should rodents’ cages typically be cleaned in a standard facility?
A. Every day
B. Once a week
C. Once a month
D. Only when visibly dirty
Answer: B
Rationale: Weekly cage cleaning maintains hygiene without causing excessive stress to the
animals.
16. What is the proper angle for performing a subcutaneous injection in a small rodent?
A. 15–30°
B. 45–60°
C. 90°
D. 120°
Answer: A
Rationale: A shallow angle of 15–30° ensures the injection is delivered into the subcutaneous
space without penetrating muscle.
17. Which of the following is a zoonotic disease commonly associated with laboratory
rodents?
A. Salmonellosis
B. Malaria
C. Influenza A in humans
D. Ringworm
Answer: A
Rationale: Salmonellosis can be transmitted from rodents to humans through contact with
contaminated materials.
18. What does “enrichment” mean in laboratory animal care?
A. Feeding more protein
B. Providing stimuli to encourage natural behaviors
C. Administering vitamins
D. Keeping animals in isolation
Answer: B
Rationale: Enrichment promotes mental and physical well-being through toys, nesting, or
social interaction.
19. What is the normal gestation period for a laboratory mouse?
A. 10–12 days
B. 19–21 days
C. 28–30 days
D. 40–42 days
CERTIFICATION EXAM | QUESTIONS AND 100%
CORRECT ANSWERS WITH RATIONALES | LATEST
UPDATE GRADED A+
1. What is the primary purpose of the Institutional Animal Care and Use Committee
(IACUC)?
A. To conduct research on animals
B. To oversee and ensure humane treatment of laboratory animals
C. To provide veterinary care only
D. To handle animal procurement
Answer: B
Rationale: The IACUC ensures that all animal research is conducted ethically and in
compliance with federal regulations.
2. Which species is considered a non-rodent commonly used in laboratory research?
A. Rat
B. Rabbit
C. Mouse
D. Hamster
Answer: B
Rationale: Rabbits are non-rodent species frequently used in labs for research, while rats,
mice, and hamsters are rodents.
3. What is the normal body temperature range for a healthy adult laboratory mouse?
A. 28–30°C
B. 36–38°C
C. 40–42°C
D. 32–34°C
Answer: B
Rationale: Healthy mice maintain a body temperature of approximately 36–38°C.
4. Which type of cage bedding is preferred for rodents due to low dust and absorbency?
A. Sawdust
B. Corncob
C. Straw
D. Sand
Answer: B
Rationale: Corncob bedding is absorbent and produces minimal dust, making it safer for
rodent respiratory health.
,5. The term "ad libitum" in laboratory animal feeding refers to:
A. Feeding restricted amounts at specific times
B. Continuous access to food or water
C. A type of specialized diet
D. Fasting animals for experiments
Answer: B
Rationale: "Ad libitum" allows animals free access to food or water at all times.
6. What is the purpose of sterilizing surgical instruments in animal research?
A. To improve grip
B. To prevent infection
C. To make them easier to clean
D. To calibrate instruments
Answer: B
Rationale: Sterilization eliminates microbes to reduce the risk of post-surgical infections.
7. Which method is commonly used for identifying laboratory mice?
A. Ear tagging
B. Tail tattooing
C. Microchip implantation
D. All of the above
Answer: D
Rationale: Ear tags, tail tattoos, and microchips are all standard identification methods for
mice.
8. What is the primary route for administering liquids to small rodents in research?
A. Subcutaneous injection
B. Oral gavage
C. Intraperitoneal injection
D. Inhalation
Answer: B
Rationale: Oral gavage is a precise method for delivering liquids directly into the stomach of
small rodents.
9. What does PPE stand for in a laboratory animal facility?
A. Personal Protective Equipment
B. Primary Pathogen Exposure
C. Protein Processing Enzyme
D. Preventive Pest Eradication
Answer: A
Rationale: PPE includes gloves, gowns, masks, and eye protection to protect personnel from
hazards.
,10. Which sign indicates a healthy rabbit?
A. Rough coat and weight loss
B. Bright eyes, clean ears, and alert behavior
C. Labored breathing and lethargy
D. Diarrhea
Answer: B
Rationale: Healthy rabbits have smooth coats, clear eyes, clean ears, and are alert and
active.
11. What is the main purpose of quarantine for new animals in a facility?
A. To train them for research
B. To prevent introduction of disease
C. To adjust their diet
D. To acclimate them to researchers
Answer: B
Rationale: Quarantine minimizes the risk of spreading infectious agents to the existing
colony.
12. Which is a common sign of stress in laboratory mice?
A. Grooming and normal activity
B. Hunched posture, decreased activity, and ruffled fur
C. Rapid eating and drinking
D. Increased social interaction
Answer: B
Rationale: Stress often presents with hunched posture, lethargy, and poor grooming in mice.
13. Which sterilization method uses high-pressure saturated steam?
A. Dry heat
B. Autoclaving
C. Chemical sterilization
D. Filtration
Answer: B
Rationale: Autoclaving uses high-pressure steam to effectively sterilize instruments and
materials.
14. What is a cage card used for in laboratory animal rooms?
A. To identify the animal’s species and study
B. To record veterinary notes
C. To track facility cleaning schedules
D. To label feed types
Answer: A
Rationale: Cage cards provide essential information such as species, identification number,
and experimental details.
, 15. How often should rodents’ cages typically be cleaned in a standard facility?
A. Every day
B. Once a week
C. Once a month
D. Only when visibly dirty
Answer: B
Rationale: Weekly cage cleaning maintains hygiene without causing excessive stress to the
animals.
16. What is the proper angle for performing a subcutaneous injection in a small rodent?
A. 15–30°
B. 45–60°
C. 90°
D. 120°
Answer: A
Rationale: A shallow angle of 15–30° ensures the injection is delivered into the subcutaneous
space without penetrating muscle.
17. Which of the following is a zoonotic disease commonly associated with laboratory
rodents?
A. Salmonellosis
B. Malaria
C. Influenza A in humans
D. Ringworm
Answer: A
Rationale: Salmonellosis can be transmitted from rodents to humans through contact with
contaminated materials.
18. What does “enrichment” mean in laboratory animal care?
A. Feeding more protein
B. Providing stimuli to encourage natural behaviors
C. Administering vitamins
D. Keeping animals in isolation
Answer: B
Rationale: Enrichment promotes mental and physical well-being through toys, nesting, or
social interaction.
19. What is the normal gestation period for a laboratory mouse?
A. 10–12 days
B. 19–21 days
C. 28–30 days
D. 40–42 days
