CCIL EXAM | QUESTIONS & 100%
CORRECT ANSWERS (VERIFIED) | LATEST
UPDATE | GRADEA+
Sampling from a mixer/truck agitator- Where is sample taken?
Correct Answer: Between 10% and 90% (Not when testing with Super P)
How is a sample taken when sampling plastic concrete?
Correct Answer: Either pa...
CCIL EXAM | QUESTIONS & 100% CORRECT ANSWERS (VERIFIED) | LATEST UPDATE | GRAD E A+ Sampling from a mixer/truck agitator - Where is sample taken? Correct Answer: Between 10% and 90% (Not when testing with Super P) How is a sample taken when sampling plastic concrete? Correct Answer: Either pass a receptacle completely through a discharge stream OR divert a discharge stream completely into a sampling container. How many grab samples are needed when testing for uniformity of samples? Correc t Answer: 3 What size sample is needed when casting 3 100mm x 200mm cylinders? Correct Answer: Minimum 20L What size sample is needed when casting 150mm x 300mm cylinders? Correct Answer: Minimum 30L What size sample is needed when casting 150mm x 150mm x 535mm beams? Correct Answer: Minimum 55L How much extra sample is needed when more than 3 cylinders/specimens are to be cast? Correct Answer: Volume of the cylinders/specimens plus 10% extra How much time is allowed for obtaining, transporting and remixing the sample? Correct Answer: 10 minutes A sample contains aggregate larger than that appropriate for the size of the moulds or equipment. Correct Answer: It must be wet -sieved prior to test ing Information required on reports Correct Answer: Conc mix no, Sample source, Batch time/date, Sample time/date, Project site, Sample location if different, Location of conc in structure, Technician name, Lab name/address, Signature of test report rev iewer, Any deviation from test procedures Air Content Correct Answer: The volume of air voids of plastic concrete, exclusive of pore space in aggregate particles, determined through observations of the change of air volume in concrete with a change in p ressure. Slump Correct Answer: A measure of consistency of freshly mixed hydraulic cement concrete, equal to the subsidence, measured to the next 5mm, of the moulded substance immediately after the removal of the slump cone Slump Flow Correct Answer: The horizontal spread of concrete immediately upon removal of the slump cone as a measure of the unconfined fluidity of concrete giving a relative degree of indication of the degree to which concrete can travel How many water -to-cementing materials ratio s are needed for concrete trial mixes? Correct Answer: 3 What temperature is considered stable before mixing concrete? Correct Answer: 23 C +/ - 2 C Where should cementing materials be stored? Correct Answer: In a dry place, in moisture -proof containers What sieve must cementing materials be passed through before use to reject lumps? Correct Answer: 1.25mm or finer
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