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WorksheetsCivil war-Day 38-PWD-Fresh concrete& mix proportioning
Total questions: 10
Worksheet time: 10mins
Name
Class
Date
1.
For continuous transportation of concrete, the method used is
a)
Transporting of concrete by pan
b)
Transporting of concrete by wheel barrows
c)
Transporting of concrete by belt conveyors
d)
None of these
2.
The strength development of concrete is accelerated due to steam curing due to
a)
Hydration slows down
b)
Rapid hardening occurs
c)
Hydration of cement is faster
d)
More water is available for curing
3.
Minimum period required before striking form work for slab spanning up to 4.5m
a)
14 days
b)
7 days
c)
3 days
d)
21 days
4.
Larger the fineness modulus, ________ the aggregates
a)
Medium
b)
Smaller
c)
Larger
d)
None of these
5.
What is silica fume
a)
Byproduct of producing silicon metal or ferrosilicon alloys
b)
Mono product of producing silicon metal or ferrosilicon alloys
c)
Quartz found in nature
d)
Hydrocarbon combustion products
6.
If aggregate/cement ratio is low, it is a
a)
Leaner concrete
b)
Fatty concrete
c)
Green concrete
d)
None of these
7.
Workability of concrete for given water content is good if the aggregates are
a)
Flaky aggregates
b)
Angular aggregates
c)
Rounded aggregates
d)
Elongated aggregates
8.
Apparatus used to measure slump directly in 1 minute and also relative density
a)
Kelly ball
b)
Vee Bee consistometer
c)
K-slump tester
d)
Flow table apparatus
9.
Slump value for mass concreting
a)
25–75 mm
b)
50–100 mm
c)
12–25 mm
d)
100–150 mm
10.
Size of broken stone used for plain cement concrete for foundation is
a)
40 mm
b)
20 mm
c)
12 mm
d)
60 mm
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