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 CFSC exam has 120 questions and runs 3 hours.
These 10 free CFSC questions are organized by exam domain, so you can see how each part of the Council-certified Fire and Smoke Damage Consultant blueprint is tested. Reveal the answer and explanation under each question.
An unattended saucepan of chicken stock boils dry. The carbonized contents are removed, but a rancid smoke odor persists in the kitchen and adjoining dining room. Ventilation reduces the odor temporarily. There is little visible black residue and no scorching outside the pan. Which investigation focus is most likely to explain the continuing odor?
Correct answer: B - Deposited organic films on exposed surfaces and within accessible odor reservoirs
Hot smoke flows parallel to two vertical panels with the same finish and orientation. One panel is substantially cooler, and that panel accumulates more fine soot. There is no airflow impingement or meaningful difference in electrical charge. The enhanced deposition on the cooler panel is most consistent with:
Correct answer: A - Thermophoresis
From outside a smoke-damaged basement storage room, a consultant uses a checked, calibrated probe to measure 18.2% oxygen, 2 ppm carbon monoxide, and 0% of the lower flammable limit. The planned inspection is at sea level. A technician has been fit-tested for a half-mask respirator with P100/organic-vapor cartridges. What should govern the entry decision?
Correct answer: B - Keep the room off limits until qualified personnel control and reassess the atmosphere.
Smoke from a neighboring tenant space entered a shared service chase. Fresh dark deposits are concentrated around cable penetrations into an office whose exhaust system operated during the incident. The office's central supply fan was off, its windows were closed, and fiberglass insulation fills the wall cavity. Which investigation would best test the suspected migration pathway?
Correct answer: D - Examine air leakage at penetrations connecting the contaminated chase to the office.
A work order requires lead results in micrograms per square centimeter for residue on smooth, coated-steel shelving. The coating is intact and is not part of the material to be sampled. Select the collection-and-analysis combination that answers the work order.
Correct answer: A - Wipe a measured area using validated media, then quantify the recovered lead.
Low-level metal detections appear in dust samples collected after a heavily contaminated location was sampled. The same reusable sampling tool was cleaned between locations. Unused collection media and laboratory method blanks are nondetect. Before the tool is reused, which control most directly tests for contamination remaining on it?
Correct answer: D - An equipment rinsate blank collected from the cleaned tool before it contacts the next sampling location
SEM-EDS examination of a deposit from a structure fire involving PVC produces a chlorine peak. The client asks whether this proves that hydrochloric acid remains on the sampled surface. On the evidence provided, the analytical finding establishes:
Correct answer: D - Chlorine is present in the deposit, but SEM-EDS does not establish whether it is hydrochloric acid or another chlorine-containing substance.
Comparable areas of a coated-steel surface are sampled with the same validated wipe method. Before cleaning, 60 µg of chloride is recovered from 100 cm²; after cleaning, 30 µg is recovered from 20 cm². Quality-control results are acceptable. The project's post-cleaning chloride limit is 1.0 µg/cm². Which result and disposition belong in the verification report?
Correct answer: C - 1.50 µg/cm²; the sampled location fails the project criterion.
A restoration contractor proposes replacing all glazed ceramic wall tiles exposed to smoke. Inspection finds no heat damage, glaze failure, or contamination behind the tiles. A representative cleaning trial removes the deposited residue, preserves the finish, and satisfies the project's visual and odor criteria. What scope is supported?
Correct answer: C - Clean the remaining affected tiles with the demonstrated method and verify the result.
Source-removal and surface-cleaning work has been completed in an unoccupied house. A properly functioning HEPA air cleaner markedly lowers airborne particles, but analysis still identifies a gaseous odorant. For supplemental air treatment, which change directly addresses that remaining contaminant?
Correct answer: B - Add an adequately sized sorbent bed selected for the identified gas.
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