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ACI Post-Installed Anchor Inspector study materials
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ACI Post-Installed Anchor Inspector practice questions

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Question 1Post-Installed Concrete Anchor Installation Inspection

Before installing a post-installed adhesive anchor, the drilled hole must be cleaned. What is the primary purpose of hole cleaning?

  1. To enlarge the hole diameter for easier insertion
  2. To roughen the concrete so the anchor expands more tightly
  3. To remove dust and debris that would prevent the adhesive from bonding to the concrete Correct answer.
  4. To reduce the volume of adhesive required for the installation

Explanation

Drilling leaves dust and fines on the hole walls; if not removed, the adhesive bonds to the dust rather than the concrete, drastically reducing capacity. Cleaning exposes clean concrete so the adhesive can develop its intended bond.

Question 2Post-Installed Concrete Anchor Installation Inspection

For a mechanical wedge anchor, what does the inspector verify about the fixture before tightening the anchor?

  1. That the fixture is shimmed at least 25 mm off the surface
  2. That the fixture hole is larger than the anchor's washer diameter
  3. That the fixture is fully seated against the concrete surface with no gap Correct answer.
  4. That the fixture is welded to the anchor rod

Explanation

A wedge anchor develops capacity when the nut draws the expansion clip against the hole wall while the fixture is pulled tight; a gap or soft shim prevents proper seating and load transfer. The fixture must bear firmly on the concrete.

Question 3Post-Installed Concrete Anchor Installation Inspection

An inspector measures the drilled hole and finds it deeper than the manufacturer's specified hole depth for an adhesive anchor. What is the correct action?

  1. Follow the manufacturer's instructions, which may require a deeper hole or a specific maximum, and reject if outside limits Correct answer.
  2. Fill the extra depth with adhesive and proceed
  3. Proceed, because hole depth only matters for mechanical anchors
  4. Proceed, because deeper holes always increase capacity

Explanation

Hole depth is specified by the manufacturer because embedment controls bond area; some systems allow deeper holes, others limit them, and excess depth can leave unbonded adhesive or reduce effective embedment. The inspector must apply the published installation criteria rather than assume deeper is better.

Question 4Post-Installed Concrete Anchor Installation Inspection

During inspection of a capsule-type adhesive anchor, the installer uses a hammer drill in hammer mode while setting the threaded rod. Why is this a concern?

  1. Hammering is required and is not a concern
  2. Hammering can damage the capsule and prevent proper mixing and curing of the resin Correct answer.
  3. Hammering makes the rod too short to engage the fixture
  4. Hammering increases the hole diameter beyond tolerance

Explanation

Capsule systems rely on controlled spinning and driving to rupture the capsule and mix the resin; excessive hammering can shatter the glass capsule or trap air, compromising the bond. The manufacturer specifies the setting method, often rotary-only or a defined hammer mode.

Question 5Post-Installed Concrete Anchor Installation Inspection

What does the inspector check regarding the anchor's effective embedment depth after installation of an adhesive anchor?

  1. That the hole is at least twice the anchor diameter deep
  2. That the anchor protrudes at least one diameter above the fixture
  3. That the bonded length in the concrete matches the design embedment Correct answer.
  4. That the anchor is flush with the top of the fixture nut

Explanation

Effective embedment is the length of the anchor bonded into the concrete and governs the anchor's tension capacity. The inspector confirms it matches the design value, often by checking hole depth and anchor position before and after setting.

Question 6Post-Installed Concrete Anchor Installation Inspection

An inspector observes that the specified adhesive has expired according to the date stamp on the cartridge. What should happen?

  1. Use it only for overhead installations
  2. Use it if the cartridge still flows freely
  3. Mix it with fresh adhesive to extend usability
  4. Reject the cartridge and require a product within its shelf life Correct answer.

Explanation

Adhesive performance depends on chemical formulation within its shelf life; expired product may not cure properly or achieve design strength. The inspector must reject expired material regardless of appearance.

Question 7Post-Installed Concrete Anchor Installation Inspection

What is the purpose of the torque value specified for a mechanical expansion anchor?

  1. To set the anchor's expansion clip against the hole wall and confirm load transfer Correct answer.
  2. To determine the adhesive cure time
  3. To pre-tension the concrete around the hole
  4. To measure the anchor's corrosion resistance

Explanation

Applying the specified installation torque expands the clip or sleeve against the concrete and seats the fixture, which is how the anchor develops its holding capacity. The torque value is a manufacturer requirement verified during inspection.

Question 8Post-Installed Concrete Anchor Installation Inspection

Which condition most directly indicates that a drilled hole for an adhesive anchor was not properly cleaned?

  1. The hole contains visible dust or fines when inspected before setting Correct answer.
  2. The hole diameter is at the low end of tolerance
  3. The hole has a slightly rough interior wall
  4. The hole is located near a construction joint

Explanation

Visible dust or fines remaining in the hole show that the cleaning procedure (brushing and blowing) was incomplete, which prevents adhesive bonding to the concrete. The inspector checks the hole interior before anchor installation.

Question 9Post-Installed Concrete Anchor Installation Inspection

For an adhesive anchor installed in a horizontal overhead (soffit) location, why does the manufacturer often require a specific adhesive formulation or technique?

  1. Because gravity can cause the adhesive to sag or drain out of the hole before curing Correct answer.
  2. Because overhead anchors do not require cleaning
  3. Because overhead concrete is always weaker
  4. Because overhead holes cannot be drilled

Explanation

In overhead installations, uncured adhesive can flow out of the hole under gravity, leaving voids and reducing bond. Manufacturers designate formulations and methods suitable for overhead use, and the inspector verifies compliance.

Question 10Post-Installed Concrete Anchor Installation Inspection

What does the inspector verify about the hole diameter for a mechanical expansion anchor?

  1. That it is smaller than the anchor diameter to ensure a press fit
  2. That it is at least 5 mm larger than the anchor diameter
  3. That it equals the anchor length
  4. That it matches the drill bit specified for the anchor size and type Correct answer.

Explanation

Mechanical anchors require a specific hole diameter matched to the anchor so the expansion mechanism engages the concrete as designed. Using the wrong bit size can prevent expansion or reduce capacity.

Question 11Post-Installed Concrete Anchor Installation Inspection

An inspector notices that an installer is drilling through the reinforcing steel in a concrete member where the design assumed the anchor would avoid rebar. What is the appropriate response?

  1. Require a larger drill bit to cut the rebar cleanly
  2. Allow it because rebar improves anchor capacity
  3. Allow it if the hole is cleaned twice
  4. Stop the work and require relocation or an approved engineering solution because cutting rebar can compromise the structure Correct answer.

Explanation

Cutting reinforcing steel can reduce the structural capacity of the member and is generally not permitted without engineering approval. Anchor locations are typically set to avoid rebar, and deviations require evaluation.

Question 12Post-Installed Concrete Anchor Installation Inspection

What is the role of the inspector when verifying the anchor layout against the approved drawings?

  1. To adjust spacing based on field conditions without documentation
  2. To confirm anchor type, diameter, embedment, and spacing match the design Correct answer.
  3. To select a different anchor if the drawing is inconvenient
  4. To confirm only that the anchors are visible

Explanation

The inspector compares installed anchors with the approved design, including type, size, embedment, and spacing, because capacity depends on these parameters. Deviations must be documented and approved, not decided in the field.

Question 13Post-Installed Concrete Anchor Installation Inspection

During inspection, an adhesive anchor is found to be installed with the threaded rod not fully inserted to the specified depth. What is the most appropriate action?

  1. Add more adhesive around the rod at the surface
  2. Accept it because the exposed length is longer
  3. Reject it and require reinstallation per the manufacturer's instructions Correct answer.
  4. Accept it if the nut engages at least three threads

Explanation

Insufficient insertion reduces the bonded length and the anchor's capacity, and it is a nonconforming installation. The anchor must be removed and reinstalled to the specified embedment.

Question 14Post-Installed Concrete Anchor Installation Inspection

Which factor is most important to verify regarding the concrete temperature during installation of an adhesive anchor?

  1. That the concrete temperature is above 40 °C
  2. That the concrete temperature is within the range specified by the adhesive manufacturer Correct answer.
  3. That the concrete temperature equals the ambient air temperature
  4. That the concrete temperature is below freezing at all times

Explanation

Adhesive cure and performance depend on temperature; manufacturers publish acceptable concrete and ambient temperature ranges for installation and curing. The inspector confirms conditions are within those limits.

Question 15Post-Installed Concrete Anchor Installation Inspection

What does the inspector confirm about the anchor's thread engagement above the fixture?

  1. That the specified number of threads or full nut engagement is achieved after tightening Correct answer.
  2. That the nut is welded to the rod
  3. That the rod extends at least 100 mm above the nut
  4. That the nut is hand-tight only

Explanation

Full nut engagement or the manufacturer's specified thread engagement ensures the connection can carry the design load. The inspector verifies this after the anchor is tightened.

Question 16Post-Installed Concrete Anchor Installation Inspection

An inspector observes a hollow-sounding area when tapping the concrete near a proposed anchor location. Why is this significant?

  1. It indicates the concrete may be delaminated or contain a void, which can reduce anchor capacity Correct answer.
  2. It indicates the anchor should be installed at a steeper angle
  3. It confirms the concrete is fully cured
  4. It shows the anchor will require less adhesive

Explanation

A hollow sound can indicate delamination, a void, or poor consolidation, meaning the anchor may not develop bond or expansion capacity in sound concrete. The location may need to be relocated or evaluated.

Question 17Post-Installed Concrete Anchor Installation Inspection

Which statement best describes the inspector's responsibility for documenting anchor installations?

  1. Records are optional if the installation appears correct
  2. Only failed anchors need to be documented
  3. Documentation is the sole responsibility of the owner
  4. Records should capture anchor locations, type, embedment, and any deviations for traceability Correct answer.

Explanation

Installation records provide traceability and evidence of compliance, including deviations that were resolved. The inspector documents the as-installed condition against the design.

Question 18Post-Installed Concrete Anchor Installation Inspection

An adhesive anchor cartridge requires a static mixer. What should the inspector verify about the mixed adhesive before filling the hole?

  1. That the first portion of extruded adhesive is uniform in color and free of streaks Correct answer.
  2. That the mixer nozzle is at least 1 m long
  3. That the adhesive is warm to the touch
  4. That the adhesive flows faster than water

Explanation

A uniform, streak-free extruded bead indicates the two components are properly mixed; streaking signals incomplete mixing, which prevents proper cure. The inspector confirms mixing quality before use.

Question 19Post-Installed Concrete Anchor Installation Inspection

What is the significance of the gel time and cure time published for an adhesive anchor?

  1. They define the time before the anchor can be loaded and the time the adhesive remains workable Correct answer.
  2. They define the shelf life of the cartridge
  3. They define the torque required for the nut
  4. They define the hole diameter tolerance

Explanation

Gel time is the working time before the adhesive stiffens, and cure time is the period before the anchor may be loaded or torqued. The inspector ensures loading does not occur before the specified cure.

Question 20Post-Installed Concrete Anchor Installation Inspection

An inspector finds that an anchor was loaded before the adhesive's specified cure time had elapsed. What is the concern?

  1. The anchor will be too strong
  2. The nut will loosen permanently
  3. The adhesive may not have developed strength, risking bond failure or movement Correct answer.
  4. The hole will shrink

Explanation

Loading an adhesive anchor before cure can disrupt the bond and prevent the adhesive from reaching design strength. The inspector must ensure the specified cure period is observed before loading.

Question 21Post-Installed Concrete Anchor Installation Inspection

Which of the following best describes an acceptable method for verifying hole cleanliness in the field?

  1. Visual inspection of the hole interior and following the manufacturer's brushing and blowing sequence Correct answer.
  2. Tapping the anchor after installation
  3. Measuring the hole depth only
  4. Filling the hole with water and observing drainage

Explanation

Cleanliness is verified by inspecting the hole and confirming the specified brushing and blowing steps were performed. Manufacturer instructions define the number of brush and blow cycles.

Question 22Post-Installed Concrete Anchor Installation Inspection

An inspector observes that the drill bit used for an adhesive anchor hole is worn and produces an oversized hole. Why is this a concern?

  1. Oversized holes reduce the required cure time
  2. Oversized holes increase the anchor's corrosion resistance
  3. Oversized holes reduce the bond area and may exceed the manufacturer's tolerance Correct answer.
  4. Oversized holes improve adhesive mixing

Explanation

Hole diameter tolerance ensures the specified adhesive annulus and bond area; an oversized hole reduces the bonded surface and can violate the manufacturer's limits. Worn bits should be replaced.

Question 23Post-Installed Concrete Anchor Installation Inspection

What should the inspector confirm about the fixture hole relative to the anchor for an adhesive anchor?

  1. That the fixture hole is smaller than the anchor diameter
  2. That the fixture hole is threaded
  3. That the fixture hole is filled with adhesive
  4. That the fixture hole is large enough to clear the anchor and allow proper seating without binding Correct answer.

Explanation

The fixture hole must clear the anchor so the fixture seats properly and the anchor is not forced out of alignment. Binding can prevent proper embedment and load transfer.

Question 24Post-Installed Concrete Anchor Installation Inspection

Which condition would most likely require rejection of a mechanical expansion anchor installation?

  1. The anchor spins freely in the hole after the specified torque is applied Correct answer.
  2. The fixture is firmly seated
  3. The hole was drilled with the specified bit
  4. The anchor is installed at the specified embedment

Explanation

An anchor that spins without developing resistance after torque indicates it is not engaging the concrete, often because the hole is oversized or the anchor is too small. This is a nonconforming installation.

Question 25Post-Installed Concrete Anchor Installation Inspection

An inspector is reviewing a submittal for a post-installed anchor system. Which document is most important to confirm the system is qualified for the intended application?

  1. The color of the cartridge
  2. The drill bit inventory list
  3. The manufacturer's installation instructions and qualification or evaluation documentation Correct answer.
  4. The contractor's work schedule

Explanation

Qualification or evaluation documentation demonstrates the anchor system has been tested and approved for the application, and the installation instructions define the required procedures. The inspector verifies the installed system matches these documents.

Question 26Post-Installed Concrete Anchor Installation Inspection

What is the primary purpose of a post-installed anchor?

  1. To replace reinforcing steel in a concrete member
  2. To reinforce concrete before it is placed
  3. To provide temporary support during concrete placement
  4. To connect a fixture to existing concrete after the concrete has cured Correct answer.

Explanation

Post-installed anchors are installed into existing concrete to transfer loads from a fixture to the concrete. They are not used to reinforce concrete before curing or to replace reinforcing steel.

Question 27Post-Installed Concrete Anchor Installation Inspection

Which type of post-installed anchor relies on mechanical expansion against the concrete?

  1. Mechanical expansion anchor Correct answer.
  2. Cohesion anchor
  3. Grouted anchor
  4. Adhesive anchor

Explanation

Mechanical expansion anchors develop capacity through expansion and friction against the concrete. Adhesive anchors rely on a bonding agent, and grouted anchors use cementitious grout.

Question 28Post-Installed Concrete Anchor Installation Inspection

What does the inspector verify about the concrete surface at the anchor location before installation?

  1. The surface is wet to improve bonding
  2. The surface is painted or sealed
  3. The surface is roughened with a wire brush
  4. The surface is clean and free of loose material Correct answer.

Explanation

The concrete surface at the anchor location should be clean and free of loose material, dust, or debris to ensure proper installation and load transfer. Paint or sealers may interfere with adhesive bonding, and wetting the surface is typically not required.

Question 29Post-Installed Concrete Anchor Installation Inspection

For a mechanical expansion anchor, what does the inspector check regarding the anchor's embedment depth?

  1. The anchor is embedded to at least twice the diameter
  2. The anchor extends above the concrete by at least one inch
  3. The anchor is flush with the concrete surface
  4. The anchor is embedded to the specified depth Correct answer.

Explanation

The embedment depth of a mechanical expansion anchor must match the specified depth to ensure the anchor develops its intended capacity. Being flush or extending above the surface does not indicate proper embedment.

Question 30Post-Installed Concrete Anchor Installation Inspection

During installation of an adhesive anchor, what should the inspector confirm about the adhesive mixing?

  1. The adhesive is mixed thoroughly according to the manufacturer's instructions Correct answer.
  2. The adhesive is mixed only if the cartridge is expired
  3. The adhesive is mixed with water to improve workability
  4. The adhesive is mixed by hand for at least ten minutes

Explanation

Adhesive mixing must follow the manufacturer's instructions, typically using a static mixer or mechanical mixing, to ensure proper curing and strength. Adding water or deviating from instructions can compromise the adhesive.

Question 31Post-Installed Concrete Anchor Installation Inspection

What is the inspector's role regarding the calibration of the torque wrench used for mechanical anchor installation?

  1. The inspector should verify that the torque wrench is calibrated and within its calibration period Correct answer.
  2. The inspector should calibrate the torque wrench before each use
  3. The inspector should ensure the torque wrench is set to the maximum torque
  4. The inspector should confirm the torque wrench is stored in a dry location

Explanation

The inspector verifies that the torque wrench is calibrated and within its calibration period to ensure accurate torque application. Calibration is typically performed by a qualified agency, not by the inspector on site.

Question 32Post-Installed Concrete Anchor Installation Inspection

Which of the following is a key inspection point for an adhesive anchor installation?

  1. The expiration date of the adhesive Correct answer.
  2. The brand of the drill bit
  3. The color of the adhesive cartridge
  4. The length of the threaded rod

Explanation

The expiration date of the adhesive is critical because expired adhesive may not achieve the required strength. Color, rod length, and drill bit brand are not primary inspection points.

Question 33Post-Installed Concrete Anchor Installation Inspection

What should the inspector do if the concrete at the anchor location is found to be cracked?

  1. Report the condition and seek evaluation by the engineer Correct answer.
  2. Proceed with installation as planned
  3. Fill the crack with adhesive before drilling
  4. Reduce the anchor embedment depth

Explanation

Cracks in concrete can significantly reduce anchor capacity, so the condition should be reported to the engineer for evaluation. Proceeding without evaluation or making unauthorized adjustments is not acceptable.

Question 34Post-Installed Concrete Anchor Installation Inspection

For an adhesive anchor, what does the inspector verify about the hole cleaning process?

  1. The hole is left uncleaned to improve adhesion
  2. The hole is cleaned using the manufacturer's specified method, including brushing and blowing Correct answer.
  3. The hole is cleaned with water only
  4. The hole is cleaned by rinsing with solvent

Explanation

Hole cleaning must follow the manufacturer's instructions, typically involving mechanical brushing and blowing to remove dust and debris. Water or solvent rinsing is not a substitute for the specified cleaning method.

Question 35Post-Installed Concrete Anchor Installation Inspection

An inspector observes that the installer is using a drill bit with a diameter larger than specified for an adhesive anchor. What is the most likely consequence?

  1. The anchor may have reduced load capacity due to excessive adhesive thickness Correct answer.
  2. The anchor will have increased pull-out strength
  3. The adhesive will cure faster
  4. The hole will require less cleaning

Explanation

Using an oversized drill bit creates a larger annular gap, which can reduce the anchor's load capacity because the adhesive may not perform as intended. It does not increase strength or reduce cleaning requirements.

Question 36Post-Installed Concrete Anchor Installation Inspection

What is the purpose of verifying the torque value for a mechanical expansion anchor?

  1. To determine the anchor's ultimate tensile strength
  2. To measure the anchor's corrosion resistance
  3. To ensure the anchor is fully expanded and properly tensioned Correct answer.
  4. To check the concrete compressive strength

Explanation

The specified torque ensures the expansion anchor is properly expanded and tensioned against the concrete, which is necessary for load transfer. Torque is not a measure of ultimate strength, concrete strength, or corrosion resistance.

Question 37Post-Installed Concrete Anchor Installation Inspection

During inspection of an adhesive anchor, the inspector notices that the adhesive has not cured after the specified cure time. What is the most appropriate action?

  1. Add more adhesive around the anchor
  2. Apply heat to accelerate curing
  3. Reject the anchor and investigate the cause Correct answer.
  4. Load the anchor to test its strength

Explanation

If the adhesive has not cured within the specified time, the anchor should be rejected and the cause investigated, as improper mixing, expired adhesive, or temperature issues may be responsible. Loading or modifying the anchor is not acceptable.

Question 38Post-Installed Concrete Anchor Installation Inspection

What does the inspector check regarding the fixture hole for a mechanical expansion anchor?

  1. The fixture hole is filled with adhesive
  2. The fixture hole is aligned with the drilled hole in the concrete Correct answer.
  3. The fixture hole is threaded
  4. The fixture hole is at least twice the anchor diameter

Explanation

The fixture hole must align with the drilled hole in the concrete to allow proper insertion and load transfer. The hole size and type depend on the anchor and fixture design, but alignment is critical.

Question 39Post-Installed Concrete Anchor Installation Inspection

An inspector finds that a mechanical expansion anchor is installed in a hole that is too deep, so the anchor does not reach the specified embedment. What is the consequence?

  1. The anchor will require less torque
  2. The anchor will be easier to remove
  3. The anchor may not develop its required load capacity Correct answer.
  4. The anchor will have increased resistance to vibration

Explanation

If the anchor does not reach the specified embedment depth, it may not develop the required load capacity because the expansion mechanism is not fully engaged in the concrete. Increased vibration resistance or easier removal are not benefits.

Question 40Post-Installed Concrete Anchor Installation Inspection

What should the inspector verify about the adhesive anchor's threaded rod protrusion above the fixture?

  1. The rod protrudes at least one inch above the nut
  2. The rod does not protrude at all
  3. The rod protrudes enough to allow full engagement of the nut Correct answer.
  4. The rod is flush with the top of the nut

Explanation

The threaded rod should protrude sufficiently to allow full engagement of the nut, typically at least one full thread beyond the nut. Being flush or not protruding would prevent proper engagement.

Question 41Post-Installed Concrete Anchor Installation Inspection

During inspection of an adhesive anchor, the inspector notices that the installer is using a cartridge that has been open for several days. What is the concern?

  1. The adhesive will cure faster
  2. The adhesive will have a longer shelf life
  3. The adhesive may have hardened or become contaminated Correct answer.
  4. The adhesive will require less mixing

Explanation

An opened cartridge can allow moisture or contaminants to enter, potentially causing the adhesive to harden or lose effectiveness. It does not improve cure time or shelf life.

Question 42Post-Installed Concrete Anchor Installation Inspection

What is the inspector's responsibility regarding the verification of anchor locations relative to embedded items such as rebar?

  1. The inspector should ignore rebar locations as they do not affect anchors
  2. The inspector should allow cutting of rebar if it interferes with anchor location
  3. The inspector should use a rebar locator to avoid cutting reinforcement Correct answer.
  4. The inspector should ensure anchors are placed at least 12 inches from any rebar

Explanation

The inspector should verify anchor locations using a rebar locator to avoid damaging reinforcement, which can affect structural integrity. Cutting rebar is typically not allowed without engineering approval.

Question 43Post-Installed Concrete Anchor Installation Inspection

An inspector is reviewing the installation of an adhesive anchor in a horizontal hole in a wall. What is a critical inspection point regarding the adhesive?

  1. The adhesive should be poured into the hole
  2. The adhesive should be applied to the anchor before insertion
  3. The adhesive should be injected from the top of the hole
  4. The adhesive should be injected from the bottom of the hole to avoid air pockets Correct answer.

Explanation

For horizontal or overhead holes, adhesive should be injected from the bottom of the hole to ensure complete filling and avoid air pockets. Injecting from the top or pouring may leave voids.

Question 44Post-Installed Concrete Anchor Installation Inspection

What does the inspector confirm about the concrete temperature during adhesive anchor installation?

  1. The concrete temperature is below freezing
  2. The concrete temperature is within the range specified by the adhesive manufacturer Correct answer.
  3. The concrete temperature is above 100°F (38°C)
  4. The concrete temperature is not relevant to adhesive performance

Explanation

Adhesive manufacturers specify a temperature range for proper curing and performance. Installation outside this range can result in inadequate curing or reduced strength.

Question 45Post-Installed Concrete Anchor Installation Inspection

An inspector observes that a mechanical expansion anchor is installed in a hole that is too shallow, preventing the anchor from reaching the required embedment. What is the most likely outcome?

  1. The anchor will not require torque
  2. The anchor will have reduced load capacity Correct answer.
  3. The anchor will have increased load capacity
  4. The anchor will be easier to install

Explanation

Insufficient embedment reduces the anchor's load capacity because the expansion mechanism cannot fully engage the concrete. Increased capacity or easier installation are not expected.

Question 46Post-Installed Concrete Anchor Installation Inspection

What is the inspector's role in verifying the anchor layout against the approved drawings?

  1. The inspector should rely on the installer's verbal confirmation
  2. The inspector should adjust the layout if it does not match the drawings
  3. The inspector should measure and confirm the locations, spacing, and edge distances Correct answer.
  4. The inspector should only check a few random anchors

Explanation

The inspector must measure and confirm that anchor locations, spacing, and edge distances match the approved drawings. Relying on verbal confirmation or checking only a few anchors is insufficient.

Question 47Post-Installed Concrete Anchor Installation Inspection

During inspection of an adhesive anchor, the inspector notices that the hole was drilled with a hammer drill and the hole appears rough. What is the concern?

  1. The rough hole may require additional cleaning and could affect adhesive performance Correct answer.
  2. The rough hole is preferred for all adhesive anchors
  3. The rough hole may improve adhesive bonding
  4. The rough hole indicates the concrete is too strong

Explanation

Hammer drilling can create a rougher hole, which may require more thorough cleaning to remove dust and debris. The roughness itself is not necessarily beneficial and can affect adhesive performance if not properly cleaned.

Question 48Post-Installed Concrete Anchor Installation Inspection

An inspector is evaluating a mechanical expansion anchor installation where the anchor is not perpendicular to the concrete surface. What is the primary concern?

  1. The anchor will have increased resistance to pull-out
  2. The anchor will require less embedment
  3. The anchor will be easier to torque
  4. The anchor may not develop full load capacity due to uneven expansion Correct answer.

Explanation

An anchor installed at an angle may not expand uniformly, leading to reduced load capacity and potential stress concentrations. It does not improve torque or pull-out resistance.

Question 49Post-Installed Concrete Anchor Installation Inspection

What should the inspector do if the adhesive anchor's specified cure time is not met due to cold weather, but the installer wants to proceed with loading?

  1. Allow loading because cold weather accelerates curing
  2. Allow loading if the anchor feels secure
  3. Prohibit loading until the adhesive has cured according to the manufacturer's instructions Correct answer.
  4. Allow loading if additional adhesive is applied

Explanation

Loading must not occur until the adhesive has fully cured as per the manufacturer's instructions. Cold weather typically slows curing, so the specified cure time must be extended accordingly.

Question 50Post-Installed Concrete Anchor Installation Inspection

An inspector observes that a mechanical expansion anchor is installed in a hole that is significantly oversized. What is the most appropriate action?

  1. Reject the installation and require a new hole at a nearby location Correct answer.
  2. Reduce the torque to avoid cracking the concrete
  3. Fill the oversized hole with adhesive and reinstall the anchor
  4. Accept the installation if the anchor feels tight

Explanation

An oversized hole can prevent the expansion anchor from developing the required capacity. The installation should be rejected, and a new hole should be drilled at a location approved by the engineer.