Test your knowledge about Civil Engineering – Concrete Technology by taking this Multi Choice Question (MCQ) quiz. Get your score and actual answers at the end of this quiz.
1. The high strength of rapid hardening cement at early stage, is due to its
finer grinding
burning at high temperature
increased lime cement
higher content of tricalcium.
2.
Vicat’s apparatus is used for
fineness test
consistency test
setting time test
soundness test
3. M 150 grade of concrete approximates
1 : 3 : 6 mix
1 : 1 :2 mix
1 : 2 : 4 mix
1 : 1.5 : 3 mix
4. Workability of concrete is measured by
Vicat apparatus test
Slump test
Minimum void method
Talbot Richard test.
5.
Internal friction between the ingredients of concrete, is decreased by using
less water
fine aggregates
rich mix
more water and coarse aggregates
6.
For road pavements, the cement generally used, is
ordinary Portland cement
rapid hardening cement
low heat cement
blast furnace slag cement
7. Separation of coarse aggregates from mortar during transportation, is known
bleeding
creeping
segregation
shrinkage
8. Addition of pozzolana to ordinary port land cement, causes
decrease in early strength
reduction in chemical action with sulphates
increase in shrinkage
all the above.
9. Too wet concrete may cause
weakness of concrete
excessive laitance
segregation
all the above.
10.
You are asked to construct a massive dam, the type of cement you will use, is
ordinary Portland cement
rapid hardening cement
low heat cement
blast furnace slag cement
11. Water required per bag of cement, is
7 Kg
14 Kg
21 Kg
35 Kg
12. Percentage of pozzolanic material containing clay upto 80% used for the manufacture of pozzolana cement, is
30%
40%
50%
60%
13.
For batching 1:3:6 concrete mix by volume, the ingredients required per bag of 50 kg cement, are:
70 litres of sand and 120 litres of aggregates
70 kg of sand and 140 litres of aggregates
105 litres of sand and 140 litres of aggregates
105 litres of sand and 210 litres of aggregates
14. The process of hardening the concrete by keeping its surface moist is known
placing
wetting
curing
compacting
15. The grade of concrete not recommended by I.S. : 456, is
M 100
M 200
M 300
M 500
16. C.R.R.I. charts are used to obtain a relatioship between strength of concrete and
water cement ratio
workability
grading of aggregate
fineness modulus
17. Workability of concrete for a given water content is good if the aggregates, are
rounded aggregate
irregular aggregate
angular aggregate
flaky aggregates.
18. For compacting plain concrete road surface of thickness less than 20 cm, we use
internal vibrator
screed vibrator
form vibrator
none of these.
19. Specified compressive strengh of concrete is obtained from cube tests at the end of
3 days
7 days
14 days
28 days
20. An aggregate is said to be flaky, if its least dimension is less than
2/3 mean dimension
3/4 mean dimension
3/5 mean dimension
5/8 mean dimension
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