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 EPDMSI exam has 60 questions and runs 1 hour.
These 10 free EPDMSI questions are organized by exam domain, so you can see how each part of the EPDM Systems Installer (EPDMSI) blueprint is tested. Reveal the answer and explanation under each question.
A powered membrane-handling machine will travel in one direction on a low-slope roof. Under the crew's otherwise compliant warning-line and personal fall-arrest arrangement, the line is 7 ft from the edge parallel to travel and 8 ft from the edge perpendicular to travel. Which adjustment satisfies OSHA's setback requirements before the machine operates?
Correct answer: A - Move the perpendicular-edge line to 12 ft; retain the 7-ft parallel-edge setback.
Before entering a dusty work area, a roofer dons the specified N95 and detects a cheek leak during the user seal check. The respirator is intact, medical clearance and the fit test for this model are current, and facial fit has not changed. The next step is to:
Correct answer: A - Reseat the respirator as instructed, then repeat the user seal check before entry.
At a shift change, the outgoing crew reports that an EPDM field sheet is bonded and its side laps are complete. An end lap remains beneath a temporary night seal. Before the incoming crew lays the next sheet, which handoff information most directly prevents unfinished waterproofing from being concealed?
Correct answer: A - The location of the temporary closure and the unfinished end lap
A Tramex RWS has been confirmed suitable for a particular EPDM roof assembly and set using a known dry reference area. The reference reads 15; a nearby area with the same construction reads 70. What can be concluded from these readings alone?
Correct answer: D - The second area has an elevated comparative response that warrants investigation.
A factory-molded boot will not fit an irregular penetration. The approved alternative uses a field-formed EPDM flashing that must conform closely around the changing profile. Which material is intended for that shaping work?
Correct answer: C - Uncured EPDM flashing with a pressure-sensitive adhesive backing
A sheet in a continuous roof air-and-vapor-control layer has a water-vapor permeance of 0.4 US perm. The material is intact, but air is passing through an unsealed lap. What do the permeance and leakage observations mean together?
Correct answer: D - Class II; air bypasses the intact material through the unsealed lap.
Both mating surfaces for an adhered EPDM sheet have been coated with Elevate BA-2004(T). The adhesive feels dry to a light touch, but a clean finger pressed down and forward draws out wet strings. What does this check indicate?
Correct answer: C - More flash-off time is needed before repeating the touch-push check.
The layout calls for six 10-ft-wide EPDM sheets across a field that is 58 ft 3 in wide. Adjacent sheets overlap by 6 in, and perimeter allowances have already been handled separately. Before cutting, what should the installer report about the planned coverage?
Correct answer: B - It is 9 in short of the required field width.
While planning a Carlisle SecurTAPE field lap, an installer sees that the remaining tape roll would end exactly where the lap crosses a factory seam. How should the roll change be arranged?
Correct answer: C - Move the roll-end overlap away from the crossing, leaving continuous tape through it.
Before flashing, a drain's compression ring seated evenly against the bare flange. After EPDM flashing was installed, one side no longer seats evenly; a membrane fold runs under the ring. The drain body and fasteners are sound. Which correction addresses the cause?
Correct answer: D - Remove the fold from beneath the ring, then reseal and reclamp.
The EPDMSI exam also covers these domains. Drill them in the full free practice test:
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