10 free, exam-style AALAS Laboratory Animal Technician (LAT) practice questions with answers and explanations. No signup required. Work through them below, then take the full free LAT practice test to study every exam domain.
A newly hired technician is told that every warm-blooded animal in the facility is regulated under the Animal Welfare Act (AWA). When bred specifically for use in research, which of the following species is EXCLUDED from coverage under the AWA?
Correct answer: D - Mice
When using a gradual-fill carbon dioxide (CO₂) method to euthanize rodents, the current AVMA Guidelines recommend introducing CO₂ at a chamber displacement rate of:
Correct answer: A - 30% to 70% of the chamber volume per minute
A drug is to be administered at a dose rate of 10 mg/kg to a rat weighing 250 g. What is the correct total dose?
Correct answer: C - 2.5 mg
In an institution's annual USDA report, a procedure that causes pain or distress that IS relieved through the appropriate use of anesthetics, analgesics, or tranquilizers is reported under which pain and distress category?
Correct answer: C - Category D
What is the key distinction between sterilization and disinfection?
Correct answer: D - Sterilization destroys all microorganisms, including bacterial spores
Guinea pigs lack the enzyme needed to synthesize a particular nutrient and will develop deficiency disease (e.g., scurvy) if it is not supplied in the diet. Which nutrient is it?
Correct answer: B - Vitamin C
According to the Guide for the Care and Use of Laboratory Animals, which range of fresh-air changes per hour is generally cited as an acceptable guideline for animal housing rooms?
Correct answer: A - 10 to 15 air changes per hour
A technician is bitten by a rhesus macaque while restraining it for an exam. Exposure to which zoonotic agent is the PRIMARY concern requiring immediate wound first aid and urgent medical evaluation?
Correct answer: B - B virus (Macacine herpesvirus 1)
A technician makes a written error while recording an entry in a controlled-substance log. What is the correct way to correct the mistake?
Correct answer: D - Draw a single line through it, then initial and date the change
A room is used to house animals that have been intentionally infected with an infectious agent. To help contain that agent, the room should be maintained at which air pressure relative to the adjoining corridor?
Correct answer: B - Negative air pressure relative to the corridor
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