CCIL Concrete Study Material 2024/2025
Exam Questions Marking Scheme New
Update | A+ Rated
At what point should a sample be collected from a truck agitator or mixer? -
🧠ANSWER ✔✔Between the 10% and the 90% points of the discharge
What is grab sampling? - 🧠ANSWER ✔✔The operation of securing at one
point of the discharge the required volume of representative material in as
short a period of time as possible
How much volume of concrete is needed to cast cylinders? - 🧠ANSWER
✔✔100 mm x 200 mm - 20L. 150 mm x 300 mm - 30L. Beams 150 mm x
150 mm x 535 mm - 55L.
When casting more than 3 cylinders or beams, the minimum required
volume of the sample shall: - 🧠ANSWER ✔✔Be increased by 10%
Can the concrete used for a slump test be reused for other tests? -
🧠ANSWER ✔✔Yes - provided that it is recombined thoroughly with the
whole sample
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 1
STATEMENT. ALL RIGHTS RESERVED
, How long after collecting the sample do you have to transport and remix it?
- 🧠ANSWER ✔✔10 minutes
Can you use cardboard cylinder molds for concrete over 35 MPa? -
🧠ANSWER ✔✔No
What are the requirements of molds used for flexural tests (beams)? -
🧠ANSWER ✔✔Must be 50 mm longer than the length of span prescribed in
CSA A23.2-8C. Must be watertight and made of rigid, non-absorbent
material
What are the tamping rod dimensions? - 🧠ANSWER ✔✔For 100 x 200 mm
cylinders: rod diameter 10 +/- 1 mm and between 500 - 600 mm length
For 150 x 300 mm cylinders and larger & beams: rod diameter 16+/- 1 mm
and between 500 - 600 mm length.
Rods must have at least ONE rounded tip
How many hertz to the vibrator? - 🧠ANSWER ✔✔120 Hz
What are the vibrator dimensions? - 🧠ANSWER ✔✔Outside diameter
between 20 - 40 mm. Minimum length is 50 mm LESS than the mold being
consolidated.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 2
STATEMENT. ALL RIGHTS RESERVED
Exam Questions Marking Scheme New
Update | A+ Rated
At what point should a sample be collected from a truck agitator or mixer? -
🧠ANSWER ✔✔Between the 10% and the 90% points of the discharge
What is grab sampling? - 🧠ANSWER ✔✔The operation of securing at one
point of the discharge the required volume of representative material in as
short a period of time as possible
How much volume of concrete is needed to cast cylinders? - 🧠ANSWER
✔✔100 mm x 200 mm - 20L. 150 mm x 300 mm - 30L. Beams 150 mm x
150 mm x 535 mm - 55L.
When casting more than 3 cylinders or beams, the minimum required
volume of the sample shall: - 🧠ANSWER ✔✔Be increased by 10%
Can the concrete used for a slump test be reused for other tests? -
🧠ANSWER ✔✔Yes - provided that it is recombined thoroughly with the
whole sample
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 1
STATEMENT. ALL RIGHTS RESERVED
, How long after collecting the sample do you have to transport and remix it?
- 🧠ANSWER ✔✔10 minutes
Can you use cardboard cylinder molds for concrete over 35 MPa? -
🧠ANSWER ✔✔No
What are the requirements of molds used for flexural tests (beams)? -
🧠ANSWER ✔✔Must be 50 mm longer than the length of span prescribed in
CSA A23.2-8C. Must be watertight and made of rigid, non-absorbent
material
What are the tamping rod dimensions? - 🧠ANSWER ✔✔For 100 x 200 mm
cylinders: rod diameter 10 +/- 1 mm and between 500 - 600 mm length
For 150 x 300 mm cylinders and larger & beams: rod diameter 16+/- 1 mm
and between 500 - 600 mm length.
Rods must have at least ONE rounded tip
How many hertz to the vibrator? - 🧠ANSWER ✔✔120 Hz
What are the vibrator dimensions? - 🧠ANSWER ✔✔Outside diameter
between 20 - 40 mm. Minimum length is 50 mm LESS than the mold being
consolidated.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY 2
STATEMENT. ALL RIGHTS RESERVED
