100+ Free AZ ROC CR-70 Reinforcing Bar & Wire Mesh Practice Questions

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Key Facts: AZ ROC CR-70 Reinforcing Bar & Wire Mesh Exam

50 Questions

Official Question Count

PSI Content Outline

120 Minutes

Time Limit

PSI Content Outline

70%

Passing Score

Arizona Registrar of Contractors

$66

Exam Fee

PSI Services LLC

Open Book Computerized MCQ

Exam Format

PSI / AZ ROC Guidelines

100 Questions

Practice Question Bank

OpenExamPrep Practice Bank

The Arizona ROC CR-70 Reinforcing Bar and Wire Mesh Examination consists of 50 scored multiple-choice questions administered in a 120-minute open-book PSI computer-delivered session with a 70% passing threshold ($66 exam fee). This online practice bank provides 100 realistic practice questions with detailed technical explanations, code citations, and worked rebar calculations adapted for exam preparation.

Sample AZ ROC CR-70 Reinforcing Bar & Wire Mesh Practice Questions

Try these sample questions to test your AZ ROC CR-70 Reinforcing Bar & Wire Mesh exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1According to ACI 318, what is the minimum required concrete clear cover for reinforcing steel cast directly against and permanently exposed to earth or soil?

A.3 inches

B.2 inches

C.1-1/2 inches

D.3/4 inch

Explanation: ACI 318 mandates a minimum concrete clear cover of 3 inches for reinforcing steel cast directly against and permanently in contact with earth. This extra thickness protects the rebar against moisture, soil chemicals, and corrosion. Lower cover distances apply only to concrete cast against forms or unexposed interior elements.

2What is the minimum concrete clear cover required for #7 reinforcing bars in cast-in-place concrete that will be exposed to weather after form removal?

A.2 inches

B.3 inches

C.1-1/2 inches

D.1 inch

Explanation: Per ACI 318, cast-in-place concrete exposed to earth or weather requires 2 inches of clear cover for #6 through #18 bars. For #5 bars and smaller, the required cover is reduced to 1-1/2 inches.

3What is the minimum concrete clear cover for a #4 rebar mat installed in a concrete wall exposed to weather after forms are stripped?

A.1-1/2 inches

B.2 inches

C.3 inches

D.3/4 inch

Explanation: For concrete exposed to earth or weather, ACI 318 specifies 1-1/2 inches of clear cover for #5 bars, W31/D31 wire, and smaller bars. Because #4 bars are smaller than #6, 1-1/2 inches is the governing minimum requirement.

4For an interior elevated concrete floor slab not exposed to weather or earth, what is the minimum clear concrete cover required for #5 reinforcing bars?

A.3/4 inch

B.1-1/2 inches

C.1 inch

D.1/2 inch

Explanation: ACI 318 requires a minimum clear cover of 3/4 inch for #11 and smaller reinforcing bars in interior concrete slabs, joists, and walls not exposed to weather or earth. This smaller cover is permissible because interior environments lack weather exposure and chemical deicing risks.

5Which requirement applies to precast concrete block supports ('dobies') used to elevate rebar mats above the subgrade in footings?

A.They must have a compressive strength equal to or greater than the specified strength of the poured concrete and include embedded tie wires

B.They may be made of hollow lightweight brick with embedded wire clips

C.They must have a compressive strength of at least 1,000 psi regardless of structural concrete strength

D.They must be removed from the footing during concrete vibration

Explanation: Per CRSI guidelines and ACI standards, precast concrete blocks (dobies) must have a compressive strength at least equal to the specified strength of the structural concrete being poured. They should also feature embedded tie wires to firmly secure them to the rebar mat and prevent shifting.

6What is the maximum recommended spacing between continuous slab bolsters or individual chairs supporting a mat of #4 rebar in a concrete slab per CRSI placing standards?

A.4 to 5 feet on center

B.2 to 2-1/2 feet on center

C.8 to 10 feet on center

D.6 to 7 feet on center

Explanation: CRSI Placing Reinforcing Bars recommends spacing slab bolsters and bar chairs 4 to 5 feet apart on center for typical slab rebar mats (#4 or #5 bars). Spacing supports farther apart can allow bars to sag under construction foot traffic and fresh concrete placement.

7According to ACI 318, what is the minimum clear spacing required between parallel reinforcing bars placed in a single horizontal layer in a beam?

A.The largest of 1 inch, the nominal bar diameter (db), or 4/3 the maximum aggregate size

B.Exactly 2 inches for all bar sizes

C.The smaller of 1 inch or 1.5 times the bar diameter

D.1/2 inch plus the thickness of the tie wire knot

Explanation: ACI 318 states that the minimum clear distance between parallel bars in a layer must not be less than 1 inch, one nominal bar diameter (db), or 4/3 times the nominal maximum size of coarse aggregate, whichever is largest. This ensures fresh concrete and coarse aggregate flow freely around every bar without honeycombing.

8Per ACI 117, what is the specified placement tolerance for concrete cover on a member with a depth of 8 inches or less where the specified cover is 1.5 inches?

A.-3/8 inch

B.-1/8 inch

C.-3/4 inch

D.-1 inch

Explanation: ACI 117 specifies that for member depths (d) of 8 inches or less, the tolerance on concrete cover is -3/8 inch (with a maximum reduction of 3/8 in from specified cover, subject to minimum cover rules). For depths greater than 8 inches, the tolerance is -1/2 inch.

9When installing epoxy-coated reinforcing bars in a concrete parking deck, what type of bar supports must be used?

A.All-plastic chairs, plastic-coated wire supports, or epoxy-coated steel supports

B.Plain uncoated bright basic steel wire chairs

C.Raw aluminum bar bolsters

D.Untreated wooden blocks

Explanation: CRSI and ACI specifications require that bar supports for epoxy-coated rebar be non-metallic (all-plastic), plastic-coated steel (Class 1 plastic protected), or coated with dielectric material (epoxy). Plain steel or bare metal chairs damage the epoxy coating and initiate localized galvanic corrosion.

10According to ACI 318, what is the minimum clear distance required between longitudinal vertical bars in a reinforced concrete column?

A.The largest of 1.5 inches, 1.5 bar diameters (1.5 db), or 4/3 the maximum aggregate size

B.1.0 inch regardless of bar diameter

C.2.5 inches for all columns

D.3.0 bar diameters for all Grade 60 bars

Explanation: ACI 318 requires column longitudinal bars to have a minimum clear distance equal to the largest of 1.5 inches, 1.5 times the nominal bar diameter (1.5 db), or 4/3 times the maximum coarse aggregate size. This ensures proper flow of column concrete mix around congested vertical bars.

About the AZ ROC CR-70 Reinforcing Bar & Wire Mesh Exam

The Arizona ROC CR-70 Reinforcing Bar and Wire Mesh Examination is a computer-delivered, open-book trade examination administered by PSI Services LLC for the Arizona Registrar of Contractors. The exam tests comprehensive reinforcing steel and wire mesh construction knowledge, including subgrade support selection, clear cover tolerances per ACI 318/117, bar fabrication and hook details, manual wire tying techniques per CRSI, tension and compression lap splicing, mechanical and welded couplers, welded wire reinforcement (WWR) layout and splicing, and OSHA 1926 rebar impalement and fall protection standards.

Questions

50 scored questions

Time Limit

120 minutes

Passing Score

70%

Exam Fee

$66 (Arizona ROC / PSI Services LLC)

AZ ROC CR-70 Reinforcing Bar & Wire Mesh Exam Content Outline

30%

Reinforcing Steel - Materials

15 of 50 items on the official PSI content outline. Bar sizes, grades and markings, welded wire reinforcement, epoxy and galvanized coatings, storage and identification.

30%

Reinforcing Steel - Placement

15 of 50 items on the official PSI content outline. Placing drawings, cover, spacing, supports and chairs, tying, splices and hooks.

20%

Post-Tensioning

10 of 50 items on the official PSI content outline. Unbonded and bonded tendons, anchorages, stressing sequence, elongation records and safety zones.

20%

Safety

10 of 50 items on the official PSI content outline. OSHA 29 CFR 1926 rebar impalement protection, material handling, tie wire hazards and post-tensioning exclusion zones.

How to Pass the AZ ROC CR-70 Reinforcing Bar & Wire Mesh Exam

What You Need to Know

Passing score: 70%
Exam length: 50 questions
Time limit: 120 minutes
Exam fee: $66

Keys to Passing

Work through all 100 available questions
Review every answer and explanation
Track weak areas and revisit them
Use our AI tutor for tough concepts

AZ ROC CR-70 Reinforcing Bar & Wire Mesh Study Tips from Top Performers

1Memorize ACI 318 concrete cover requirements: 3 inches for concrete cast directly against soil/earth, 1-1/2 to 2 inches for weather-exposed concrete, and 3/4 inch for interior slabs/walls.

2Understand tie wire types and knot applications: snap ties for horizontal slabs, wrap and snap for wall mats to prevent vertical slipping, saddle (U) ties for beam/column cages, and figure-eight ties for heavy column mats.

3Master lap splice calculations: Class A tension splices equal 1.0 ld, Class B tension splices equal 1.3 ld (minimum 12 inches), and Grade 60 compression splices equal 30 bar diameters (30 db). Note that #14 and #18 bars cannot be lap spliced.

4Know WWR style nomenclature: 6x6-W2.9/W2.9 indicates 6-inch wire grid spacing with W2.9 plain wires (0.029 sq in area). Splicing plain WWR requires at least one wire space plus 2 inches of overlap between outermost cross wires.

5Master OSHA 1926.701(b) impalement protection rules: all vertical protruding rebar must be guarded by approved impalement caps capable of withstanding a 250 lb weight dropped from 10 feet.

Frequently Asked Questions

How many questions are on the official Arizona ROC CR-70 exam?

The official PSI CR-70 Reinforcing Bar and Wire Mesh exam contains 50 scored multiple-choice questions. Candidates are allotted 120 minutes to complete the test.

What passing score is required for the AZ ROC CR-70 exam?

A minimum passing score of 70% (35 correct out of 50 questions) is required to pass the trade exam.

Is the Arizona ROC CR-70 exam open book?

Yes, the examination is open-book. Approved references (such as CRSI Placing Reinforcing Bars, ACI 318, ACI 117, and OSHA 29 CFR 1926) may be brought into the PSI test center.

What topics carry the highest weight on the CR-70 exam?

Reinforcing Steel - Materials and Reinforcing Steel - Placement each carry 15 of 50 items (30%), and Post-Tensioning and Safety each carry 10 items (20%), per the PSI CR-70 content outline.

Where can I schedule the AZ ROC CR-70 exam?

Examinations are scheduled online through PSI Services LLC at https://test-takers.psiexams.com/azcon or by phone with PSI candidate services.

100+ Free AZ ROC CR-70 Reinforcing Bar & Wire Mesh Practice Questions

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