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.
These 10 free ASD questions are organized by exam domain, so you can see how each part of the Automotive Scanner Diagnostics Certification - Zeus+ Navigation and Scanner Operation blueprint is tested. Reveal the answer and explanation under each question.
At a basement doorway, a technician sees standing water surrounding a plugged-in extension-cord connection. The homeowner says the electricity is off because the ceiling lights no longer work. No electrical isolation or testing has been verified. Which condition must be established before the technician enters the water?
Correct answer: A - A qualified person has isolated the relevant electrical supply and verified de-energization.
A potable-water supply leak has affected a clean, maintained interior. Inspection supports a sanitary water condition without deterioration. Although the visible wet area is small, probes confirm significant moisture deep within a dense, multilayer wood-floor assembly. Surface airflow alone cannot adequately reach the wet layers. Which category-and-class entry fits these findings?
Correct answer: D - Category 1; Class 4
A technician rejects outdoor-air ventilation because outdoor relative humidity is higher than indoor relative humidity. Stabilized readings are: outdoors, 50°F/80% RH/43 GPP; indoors, 77°F/50% RH/69 GPP. Available heat can maintain the planned drying temperature, and weather, air quality, and security permit controlled ventilation. How should these readings affect the decision?
Correct answer: A - Controlled ventilation can remove moisture because the incoming air has a lower humidity ratio.
A monitoring log records the following before and after electric heat is added at unchanged barometric pressure: Before: 68°F, 50% RH, approximately 51 GPP. After: 86°F, approximately 28% RH, approximately 51 GPP. The progress note credits the RH reduction to substantial moisture removal. Which correction belongs in that note?
Correct answer: C - Heating explains the lower RH; the readings do not demonstrate a reduction in humidity ratio.
After a sanitary supply-line loss, the carpet and cushion have been assessed as clean, physically sound, and suitable for retention. Standing water is gone, but inspection after ordinary wand extraction shows that the cushion still holds substantial recoverable liquid. A compatible weighted extraction tool is available. Before increasing evaporative drying capacity, the technician should:
Correct answer: B - Use the weighted tool to improve liquid recovery from the retained carpet-and-cushion assembly.
An infrared scan shows a cool vertical stripe at a metal corner bead. A pinless meter reads high along that stripe, but appropriate pin measurements reaching the suspect gypsum and avoiding metal match an unaffected reference. An unaffected corner with the same construction produces a similar pinless response. What is the most defensible interpretation?
Correct answer: D - Metal interference likely explains the pinless response; retain the findings and monitor the verified material points.
Room air in a kitchen drying chamber remains at 80°F and 35 grains per pound (GPP). Corrected, same-depth readings in the plywood beneath a sound base cabinet remain at 23% moisture content over three visits; the documented goal is 12%. The leak is repaired, and inspection has found no contamination or material failure. Air movers blow across the closed cabinet front. Safe removal of the toe-kick is authorized. Which change most directly addresses the stalled drying?
Correct answer: C - Open the toe-kick and establish conditioned airflow through the wet cabinet cavity.
A drying plan requires at least 270 U.S. pints of moisture removal per day at 80°F and 60% RH. The available identical LGR dehumidifiers are rated at 80 pints/day at 80°F/60% RH and 144 pints/day at 90°F/90% RH. For this initial capacity check, use the matching-condition rating and assume capacities add. What is the minimum number of units that meets the plan?
Correct answer: D - 4 dehumidifiers
A solid hardwood floor has cupped after a repaired leak: board edges stand above their centers. Corrected measurements are 11% moisture content near the upper face and 22% near the underside. The documented drying goal is 12%, and the boards remain securely fastened. A refinisher proposes sanding the floor flat while drying continues. The appropriate response is to:
Correct answer: B - Defer sanding, address the moisture imbalance, and reassess the floor after it has equilibrated.
Before disturbing contaminated wallboard, a crew checks containment beside an occupied hallway. The plan requires airflow from the cleaner hallway into the work zone. With the entry closed, a manometer reads +4 Pa using ΔP = work-zone pressure minus hallway pressure. A HEPA unit is recirculating air entirely within the enclosure. Which change establishes the intended airflow control?
Correct answer: A - Arrange HEPA-filtered exhaust to a safe outdoor discharge, then verify inward airflow at the enclosure.
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