ACI CLTT-2 Practice Questions - ACI Concrete Laboratory Testing Technician - Level 2 Exam - ACI CLTT-2 Practice Questions - ACI Concrete Laboratory Testing Technician

Question 1

Per ASTM C192/C192M, what is the number of rod strokes required per layer when consolidating a standard 150 x 300 mm (6 x 12 in.) concrete cylinder by rodding?

15 strokes per layer 20 strokes per layer 25 strokes per layer 50 strokes per layer

Correct Answer:

25 strokes per layer

Question 2

According to ASTM C192/C192M, how is the method of consolidation (rodding vs vibration) selected when not specified by the project?

Always rod cylinders and vibrate beams By slump — rod if slump ≥ 25 mm (1 in.), vibrate if slump < 25 mm (1 in.) By aggregate size — vibrate if NMSA > 25 mm By cylinder size only

Correct Answer:

By slump — rod if slump ≥ 25 mm (1 in.), vibrate if slump < 25 mm (1 in.)

Question 3

ASTM C192/C192M requires initial curing of molded specimens for the first 24 hours at what temperature range?

10 to 16 °C (50 to 60 °F) 16 to 27 °C (60 to 80 °F) 20 to 30 °C (68 to 86 °F) 23.0 ± 2.0 °C (73.5 ± 3.5 °F)

Correct Answer:

16 to 27 °C (60 to 80 °F)

Question 4

Per ASTM C192/C192M, what temperature is required for the moist room or water tank used for final curing of strength-test specimens?

18.0 ± 2.0 °C (64.4 ± 3.6 °F) 21.0 ± 2.0 °C (70 ± 3.6 °F) 23.0 ± 2.0 °C (73.5 ± 3.5 °F) 27.0 ± 2.0 °C (80.6 ± 3.6 °F)

Correct Answer:

23.0 ± 2.0 °C (73.5 ± 3.5 °F)

Question 5

Per ASTM C192/C192M, after a 0.028 m³ (1 ft³) drum batch is mixed, what is the minimum allowed mixing time after all ingredients are in the mixer?

1 minute mixing, 2 minutes rest, 1 minute remix 3 minutes mixing, 3 minutes rest, 2 minutes remix 5 minutes mixing then immediate discharge 10 minutes mixing then 5 minutes rest

Correct Answer:

3 minutes mixing, 3 minutes rest, 2 minutes remix

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Prepare with the ACI CLTT-2 Practice Questions - ACI Concrete Laboratory Testing Technician - Level 2 Exam practice quiz. This question bank includes 100 questions covering astm, c192, c157, strength, and concrete. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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ACI CLTT-2 Practice Questions - ACI Concrete Laboratory Testing Technician - Level 2 Exam

This practice set contains 100 questions from the matching question bank and focuses on astm, c192, c157, strength, and concrete. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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ACI CLTT-2 Practice Questions - ACI Concrete Laboratory Testing Technician - Level 2 Exam

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