CCIL Concrete 2024/2025 Exam
Questions and Verified Answers |
Already Graded A+
Procedure for sampling plastic concrete includes - 🧠ANSWER ✔✔Every
precaution that will assist in obtaining samples that are truly representative
of the nature and conditions of the concrete
When sampling from a truck agitator or truck mixer, - 🧠ANSWER ✔✔The
sample shall be taken between the 10% and 90% points of the discharge
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.
Sampling for uniformity of mixed concrete includes: - 🧠ANSWER
✔✔Obtaining three grab samples of concrete for comparative purposes
while the mixer is being emptied and keep the samples separate to
represent the designated portions in the batch rather than combined to
form a composite sample.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
1
STATEMENT. ALL RIGHTS RESERVED
,When 100 mm x 200 mm cylinders are to be cast: - 🧠ANSWER ✔✔A
minimum 20 L sample shall be obtained.
When 150 mm x 300 mm cylinders are to be cast: - 🧠ANSWER ✔✔A
minimum 30 L sample shall be obtained.
When 150 mm x 150 mm x 535 mm cylinders are to be cast: - 🧠ANSWER
✔✔A minimum 55 L sample shall be obtained.
For more than three cylinders or beams, the minimum volume shall be
increased - 🧠ANSWER ✔✔By a value equal to the volume of the extra
specimens, plus 10%.
Sampling shall by performed - 🧠ANSWER ✔✔By passing a receptacle
completely through the discharge stream or by completely diverting the
discharge into a sample container.
The sample shall be obtained, transported, and remixed - 🧠ANSWER
✔✔Within 10 minutes.
The sample shall be protected - 🧠ANSWER ✔✔From sun, wind, and other
sources of rapid evaporation and from contamination.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
2
STATEMENT. ALL RIGHTS RESERVED
, When the concrete contains aggregate larger than that appropriate for the
size of the moulds or equipment to be used, - 🧠ANSWER ✔✔the sample
shall be wet sieved prior to testing. For all density tests, an unsieved
sample shall be used.
Do not use cardboard moulds: - 🧠ANSWER ✔✔When the specified
concrete strength is greater than 35 MPa.
Rectangular moulds: - 🧠ANSWER ✔✔Should be at least 50 mm longer
than the length of the span. Moulds shall be watertight and made of rigid,
nonabsorbent material.
Tamping rod for 100 x 200 mm cylinders - 🧠ANSWER ✔✔Straight steel 10
+- 1 mm in diameter and between 450 and 600 mm in length, having at
least one end rounded to a hemispherical tip.
Tamping rod for cylinders 150 mm in diameter or greater - 🧠ANSWER
✔✔Straight steel 16 +- 1 mm in diameter and between 450 and 600 mm in
length, having at least one end rounded to a hemispherical tip.
The frequency of vibration of an internal vibrator shall be a minimum of -
🧠ANSWER ✔✔120 Hz
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
3
STATEMENT. ALL RIGHTS RESERVED
Questions and Verified Answers |
Already Graded A+
Procedure for sampling plastic concrete includes - 🧠ANSWER ✔✔Every
precaution that will assist in obtaining samples that are truly representative
of the nature and conditions of the concrete
When sampling from a truck agitator or truck mixer, - 🧠ANSWER ✔✔The
sample shall be taken between the 10% and 90% points of the discharge
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.
Sampling for uniformity of mixed concrete includes: - 🧠ANSWER
✔✔Obtaining three grab samples of concrete for comparative purposes
while the mixer is being emptied and keep the samples separate to
represent the designated portions in the batch rather than combined to
form a composite sample.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
1
STATEMENT. ALL RIGHTS RESERVED
,When 100 mm x 200 mm cylinders are to be cast: - 🧠ANSWER ✔✔A
minimum 20 L sample shall be obtained.
When 150 mm x 300 mm cylinders are to be cast: - 🧠ANSWER ✔✔A
minimum 30 L sample shall be obtained.
When 150 mm x 150 mm x 535 mm cylinders are to be cast: - 🧠ANSWER
✔✔A minimum 55 L sample shall be obtained.
For more than three cylinders or beams, the minimum volume shall be
increased - 🧠ANSWER ✔✔By a value equal to the volume of the extra
specimens, plus 10%.
Sampling shall by performed - 🧠ANSWER ✔✔By passing a receptacle
completely through the discharge stream or by completely diverting the
discharge into a sample container.
The sample shall be obtained, transported, and remixed - 🧠ANSWER
✔✔Within 10 minutes.
The sample shall be protected - 🧠ANSWER ✔✔From sun, wind, and other
sources of rapid evaporation and from contamination.
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
2
STATEMENT. ALL RIGHTS RESERVED
, When the concrete contains aggregate larger than that appropriate for the
size of the moulds or equipment to be used, - 🧠ANSWER ✔✔the sample
shall be wet sieved prior to testing. For all density tests, an unsieved
sample shall be used.
Do not use cardboard moulds: - 🧠ANSWER ✔✔When the specified
concrete strength is greater than 35 MPa.
Rectangular moulds: - 🧠ANSWER ✔✔Should be at least 50 mm longer
than the length of the span. Moulds shall be watertight and made of rigid,
nonabsorbent material.
Tamping rod for 100 x 200 mm cylinders - 🧠ANSWER ✔✔Straight steel 10
+- 1 mm in diameter and between 450 and 600 mm in length, having at
least one end rounded to a hemispherical tip.
Tamping rod for cylinders 150 mm in diameter or greater - 🧠ANSWER
✔✔Straight steel 16 +- 1 mm in diameter and between 450 and 600 mm in
length, having at least one end rounded to a hemispherical tip.
The frequency of vibration of an internal vibrator shall be a minimum of -
🧠ANSWER ✔✔120 Hz
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
3
STATEMENT. ALL RIGHTS RESERVED
