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CCIL EXAM STUDY GUID E | 100
QUESTIONS WITH 100% CORRECT
ANSWERS | UPDATED & VERIFIED
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?
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Correct answer:Minimum 20L
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
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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
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
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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
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?