10 exam-style questions with answers and explanations, straight from our 1,030-question bank. Tap an answer to check yourself. When you're ready, take the scored version in the free practice test.
The CEAT exam has 50 questions and runs 2 hours.
These 10 free CEAT questions are organized by exam domain, so you can see how each part of the Council-certified Environmental Allergen Technician (CEAT) blueprint is tested. Reveal the answer and explanation under each question.
An office worker has a physician-reported positive cat-specific IgE test. She reports no symptoms during regular visits to a home with cats, but develops burning eyes and throat whenever a cleaning spray is used at work. What should guide the environmental investigation?
Correct answer: D - Treat the IgE result as sensitization; investigate the spray as a possible irritant.
A pet-free school repeatedly detects Fel d 1 in classroom dust. Concentrations are greatest around coat cubbies and upholstered reading chairs; supply-register dust contains much less. Field and laboratory blanks are negative, and inspection finds no evidence of cats entering the building. This distribution most strongly suggests:
Correct answer: D - Transfer on occupants' clothing followed by deposition in classroom reservoirs.
During a documented regional grass-pollen peak, an office's outdoor and indoor samples contain similar grass pollen. Indoor counts rise when windows are propped open and fall when they are closed. The building has a functioning, filtered mechanical ventilation system. Which operating change most directly reduces ongoing entry of outdoor pollen?
Correct answer: C - Keep windows closed during high-pollen periods and maintain filtered mechanical ventilation.
Water droplets recur behind a wardrobe on an exterior wall during cold, dry weather. Room air is 24°C at 50% relative humidity, with a measured dew point of 13°C. The wall surface behind the wardrobe is 9°C; nearby interior walls are 20°C. No plumbing or rainwater entry is found. What mechanism best accounts for the localized wetting?
Correct answer: A - Condensation of indoor water vapor on the cold exterior-wall surface.
For a 2,400-ft³ room, a portable air cleaner moves 300 cubic feet per minute (cfm) through its housing but has a clean air delivery rate (CADR) of 180 cfm for the particles of interest at the selected speed. It recirculates room air and supplies no outdoor air. Assuming continuous operation and a well-mixed room, its calculated contribution is:
Correct answer: C - 4.5 equivalent clean-air changes per hour.
A child with physician-confirmed dust-mite allergy has symptoms when bedding is disturbed. A short fungal air sample collected while the bedroom was empty was unremarkable. The family now wants to know whether the bed contains a dust-mite allergen reservoir. Which investigation would answer that question directly?
Correct answer: B - Collect bedding dust for quantitative Der p 1 and Der f 1 immunoassays.
An infrared image shows a cool patch on a ceiling with no visible staining or moldy odor. A contractor proposes removing the whole cool patch as water-damaged material. Before defining a removal boundary, the technician should:
Correct answer: A - Check material moisture at the anomaly and compare it with a dry, comparable ceiling area.
A sampling method accepts an absolute pre-to-post flow change of no more than 5% of the presampling flow. Verified flow is 15.0 L/min before collection and 14.4 L/min afterward. All other acceptance checks pass. Which disposition follows the method?
Correct answer: D - Accept the sample: the flow change is 4%, within the permitted limit.
Comparable 1.0-m² carpet areas are sampled before and after cleaning with the same collection and analytical methods. Before cleaning, 0.40 g of dust contains 20 µg/g of the target allergen. After cleaning, 0.10 g contains 40 µg/g. The laboratory confirms that both results are valid and comparable. How did the measured allergen surface loading change?
Correct answer: B - It fell by 50%, despite the increase in allergen concentration per gram of dust.
After a break, a technician puts on the same required tight-fitting respirator used that morning. Medical clearance is current, and the technician passed a fit test with that exact make, model, style, and size yesterday. The equipment inspection finds no damage. Under OSHA's respiratory protection standard, what check is still required before re-entry?
Correct answer: A - An individual user seal check after donning.
The full bank has 1,020 more CEAT questions with explanations.
Continue in the free practice test →
View plans