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 AZ-B1 exam has 100 questions and runs 4 hours.
These 10 free AZ-B1 questions are organized by exam domain, so you can see how each part of the Arizona B-1 General Commercial Contractor Trade Examination blueprint is tested. Reveal the answer and explanation under each question.
During a subgrade check, a benchmark elevation is 101.80 ft. The backsight is 4.65 ft, and the foresight on the subgrade point is 5.10 ft. Design subgrade at that point is 100.90 ft. Based on these readings, which instruction is correct?
Correct answer: C - Lower subgrade 0.45 ft
In a 4-ft-deep trench, the competent person finds no indication of a potential cave-in. Employees must travel 40 ft laterally to reach the only ladder. Which condition must be corrected?
Correct answer: A - Add or move access so no worker travels more than 25 ft
Concrete containing highly porous lightweight aggregate is being tested for air content. The technician should use:
Correct answer: D - ASTM C173 volumetric air-content test
For concrete specified at f'c = 4,000 psi, the last three strength tests are 4,200, 4,050, and 3,550 psi. The acceptance review should conclude that:
Correct answer: B - The concrete fails because the three-test average is below 4,000 psi
Several weeks after placement, a hard-troweled slab develops a fine powdery surface. Records show that finishers worked bleed water back into the surface and curing was poor. The most likely diagnosis is:
Correct answer: A - Dusting
The masonry specification calls for Type N mortar in an above-grade brick veneer. The foreman wants Type M because "stronger is safer." The superintendent's best response is:
Correct answer: C - Keep Type N; the specification and masonry-unit compatibility govern
After drying, a long CMU wall develops regularly spaced vertical cracks. The control-joint locations shown on the drawings were grouted solid and bridged with mortar. The evidence points to:
Correct answer: B - CMU shrinkage restrained by bridged control joints
At a bolted splice, service-load slip between the plies would misalign the supported cladding. The faying surfaces are prepared and the bolts are pretensioned. This connection should be specified as:
Correct answer: D - Slip-critical joint
Visual inspection reveals a narrow groove melted along the toe of a fillet weld and left unfilled with weld metal. The correct classification is:
Correct answer: D - Undercut
Twenty-four feet above the lower level on the second story, a connector is making initial steel connections. The connector is wearing the equipment needed to tie off and can do so. The applicable OSHA decision is to:
Correct answer: A - Proceed under connector provisions with tie-off equipment available
The AZ-B1 exam also covers these domains. Drill them in the full free practice test:
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