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These 10 free AMV questions are organized by exam domain, so you can see how each part of the Adhered Masonry Veneer Certificate Program blueprint is tested. Reveal the answer and explanation under each question.
A detached section of adhered veneer is recovered with the stone, setting mortar, scratch coat, and embedded lath still together. Several screws remain caught in the lath, but their threaded shanks are exposed. The corresponding holes in the wood backing are enlarged; the stone and mortar show no internal fracture. The failed link in the load path is the:
Correct answer: B - Connection between the lath fasteners and the wood backing.
A subcontractor submits thin veneer units made from fired clay. The reviewer needs the ASTM product specification for the units themselves, rather than an installation practice or a mortar specification. Which designation belongs on the submittal?
Correct answer: D - ASTM C1088
An adhered veneer assembly is outside the available prescriptive detail. The engineer has submitted analysis and testing for the actual backing, attachment, exposure, and loads, and the building official has approved that alternative assembly. The installation also satisfies the product restrictions. The foreman should now:
Correct answer: A - Install the approved alternative using the evaluated backing, attachments, and materials.
A laboratory-qualified Type S mortar was used on a veneer project. At 28 days, specimens molded from the site-mixed mortar average 1,150 psi in compression. A reviewer compares that result with the 1,800-psi ASTM C270 laboratory property-specification minimum and calls for removal of all affected veneer. What is the defensible interpretation of this comparison?
Correct answer: C - That field result cannot be compared directly with C270's laboratory property-specification minimum.
A sealant joint between stone veneer and a window frame has the specified width and depth. A cut sample shows the sealant bonded firmly to both side faces and also to the solid material at the back of the joint. The sealant itself is compatible with the side-face materials. During replacement, which change addresses the unwanted restraint?
Correct answer: D - Install backer rod or bond-breaker material to prevent adhesion at the joint back.
At a window head, inspection before concealment shows the sheet water-resistive barrier from above tucked behind the head flashing's vertical leg. The flashing slopes outward, but water running down the barrier passes behind it. The window perimeter sealant is intact. Which revision restores the intended drainage path?
Correct answer: A - Lap the barrier over the exterior face of the flashing's vertical leg.
The manufactured-stone veneer and base weep screed on a framed exterior wall terminate 3/4 in. above a paved porch walking surface. The porch and wall are supported by the same foundation, and the drainage outlet is clear. Under the NCMA August 2020 installation guidance, how should this base clearance be evaluated?
Correct answer: A - Retain the clearance; the common-foundation walking-surface minimum is 1/2 in.
Wind picks up while an installer is setting manufactured stone. Mortar spread 8 minutes ago has developed a skin and no longer transfers to a test unit. The product lists a nominal 15-minute open time and a 60-minute pot life. The 25-minute-old batch remains workable, and freshly spread mortar from it transfers normally. How should the installer respond?
Correct answer: C - Replace the skinned mortar and reduce the area spread ahead of placement.
The approved attachment detail requires each screw to cross 1-1/2 in. of continuous insulation, 1/2 in. of sheathing, and 1/4 in. of additional nonstructural layers before entering a wood stud. Required stud penetration is at least 3/4 in. The specified screw is stocked in the four lengths below, and its other connection requirements have been verified. What is the shortest stocked length that provides the required penetration?
Correct answer: C - 3-1/4 in.
Natural-stone veneer panels have been wet-sawn to fit an opening. They are free of standing water, but their backs carry a pale film that rubs off on a clean cloth. The receiving surface is ready, and the selected mortar is approved for the panels. What preparation is still needed before back-buttering?
Correct answer: C - Clean the backs with a damp cloth to remove the cutting residue.
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