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WorksheetsCivil war Day 23 PWD-RCC INTRO.
Total questions: 10
Worksheet time: 10mins
Name
Class
Date
1.
As cement content increases, creep
a)
increases
b)
decreases
c)
first increase then decrease
d)
first decrease then increase
2.
Mild steel have a yield point of ....... MPa
a)
140
b)
230
c)
250
d)
480
3.
Short Term Modulus of Elasticity of concrete is
a)
more than long Term Modulus of Elasticity of concrete
b)
less than long Term Modulus of Elasticity of concrete
c)
equal to long Term Modulus of Elasticity of concrete
d)
none of these
4.
The minimum cube strength of concrete used for a pre-stressed member, is ________
a)
350 kg/cm2
b)
100 kg/cm2
c)
150 kg/cm2
d)
50 kg/cm2
5.
The relation between modulus of rupture fcr, splitting tensile strength fcs and direct tensile strength fct is given by
a)
fcr = fcs = fct
b)
fcr < fcs < fct
c)
fcr > fcs > fct
d)
fcs > fcr > fct
6.
pH value of water used for concrete shall not be
a)
Less than 6
b)
6
c)
Less than 7
d)
More than 7
7.
Flexural Strength of concrete with characteristic strength fck is given by
a)
5000 √fck
b)
0.3 √fck
c)
3.13 √fck
d)
0.7 √fck
8.
Ductility factor is the ratio between :
a)
Elastic modulus x stress
b)
Elastic modulus x yield strain
c)
failure strain to yield strain
d)
Yield strain to failure strain
9.
If characteristic compressive strength at 28 days is 40 N/mm2 and the standard deviation is 5 N/mm2, the target strength at 28days for concrete mix proportioning
a)
40 N/mm2
b)
45 N/mm2
c)
43.25 N/mm2
d)
48.25 N/mm2
10.
Modulus of rupture is a measure of
a)
the tensile strength of concrete
b)
the compressive strength of concrete
c)
the shear strength of concrete
d)
none of these
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