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CCIL EXAM NEWEST VERSION
COMPLETE 100 QUESTIONS AND
CORRECT DETAILED ANSWERS
Question : Sampling from a mixer/truck agitator- Where is
sample taken?
Correct Answer: Between 10% and 90% (Not when testing
with Super P)
Question : 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.
Question : How many grab samples are needed when testing
for uniformity of samples?
Correct Answer: 3
Question : What size sample is needed when casting 3
100mm x 200mm cylinders?
Correct Answer: Minimum 20L
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Question : What size sample is needed when casting 150mm
x 300mm cylinders?
Correct Answer: Minimum 30L
Question : What size sample is needed when casting 150mm
x 150mm x 535mm beams?
Correct Answer: Minimum 55L
Question : How much extra sample is needed when more than
- cylinders/specimens are to be cast?
Correct Answer: Volume of the cylinders/specimens plus
10% extra
Question : How much time is allowed for obtaining,
transporting and remixing the sample?
Correct Answer: 10 minutes
Question : 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 testing
Question : Information required on reports
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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 reviewer, Any deviation from test procedures
Question : 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 pressure.
Question : 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
Question : 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
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Question : How many water-to-cementing materials ratios are
needed for concrete trial mixes?
Correct Answer: 3
Question : What temperature is considered stable before
mixing concrete?
Correct Answer: 23 C +/- 2 C
Question : Where should cementing materials be stored?
Correct Answer: In a dry place, in moisture-proof containers
Question : What sieve must cementing materials be passed
through before use to reject lumps?
Correct Answer: 1.25mm or finer
Question : Surface moisture in fine and coarse aggregate
should be obtained using samples of what size?
Correct Answer: 500g-1000g
Question : How much time is spent mixing concrete?
Correct Answer: Mix 3 minutes, rest 3 minutes, mix 2
minutes