CCIL Questions with correct Answers
Between what percentages must you sample a concrete truck?
10% and 90%
What is grab sampling?
Securing at one point of the discharge as fast as possible.
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CCIL Questions with correct Answers
Between what percentages must you sample a concrete truck? - answer 10% and
90%
What is grab sampling? - answer Securing at one point of the discharge as fast as
possible.
Tamping rod size for 100 x 200mm cylinders - answer 10 +/- 1mm in diameter,
between 450 mm and 600 mm
Minimum sample required for 150 x 300mm cylinder? - answer 30L
How long do you have to obtain, transport and remix sample? - answer 10 mins
Vibration Frequency of internal vibrator - answer 120Hz
Size of internal vibrator. - answer 20 to40mm in diameter, minimum 50mm in length.
weight of mallet. - answer 0.6 +- 0.3kg
strike off bar size - answer 6mm x 25mm x 450mm
Temp of water storage tanks - answer 23 +/- 2
Water in a storage tank must be saturated with what? - answer calcium hydroxide
minimum moist room humidity - answer 95%
Range of thermometer - answer 0 to 50 degrees
How often should a temperature recorder take a reading? - answer 15min
How often should temperature recorder be checked to make sure it'd working? - answer
Every 6 months
If difference between temp readings is greater than 1c, temp recorder shall be adjusted
to within ____ of reference measuring device. - answer 0.5 C
How long after sampling must strength test specimens be completed? (Cylinders) -
answer 20mins
How long must cylinders sit on site? - answer 28+/- 8h
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