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WorksheetsCivil war Day 23 LSGD-Concrete
Total questions: 10
Worksheet time: 10mins
Name
Class
Date
1.
Code specifying the details regarding coarse and fine aggregates.
a)
IS 383
b)
IS 800
c)
IS 456
d)
IS 10262
2.
The increased cohesiveness of concrete, make it
a)
Less liable to segregation
b)
More liable to segregation
c)
More liable to bleeding
d)
More liable to surface scaling in frosty weather
3.
The process of mixing, transporting, placing and compacting concrete using Ordinary Port land Cement should not take more than
a)
30 minutes
b)
40 minutes
c)
60 minutes
d)
90 minutes
4.
The vibrators used for compacting large sections of mass concrete in structure is
a)
Screed vibrator
b)
Form vibrator
c)
Internal vibrator
d)
all of these
5.
The process of removing holes and humps on the surface of concrete is termed as
a)
Levelling
b)
Floating
c)
Screeding
d)
Finishing
6.
The grade of concrete corresponding to nominal mix proportions of 1:3:6 is
a)
M 35
b)
M 25
c)
M 15
d)
M 10
7.
Common sugar added to concrete :
a)
Increases the strength of concrete
b)
Retards the setting of concrete
c)
Accelerates the setting of concrete
d)
Gives colour to concrete
8.
The concrete slump recommend for beams and slabs is
a)
25-50 mm
b)
25-75 mm
c)
50-100 mm
d)
130-150 mm
9.
Hydrophobic cement is obtained by grinding ordinary Portland cement clinker with
a)
Hydrochloric acid
b)
Oleic acid
c)
Glicerine
d)
Acetol
10.
The top diameter, bottom diameter and the height of a slump mould are
a)
10 cm, 20 cm, 30 cm
b)
20 cm, 30 cm, 10 cm
c)
10 cm, 30 cm, 20 cm
d)
30 cm, 10 cm, 20 cm
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