Civil Engineering Questions and Answers Part 4
option
1) 10 to 20 %
2)15 to 20 %
3) 20 to 25 %
4) 25 to 30 %
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Q2 The approximate ratio between the strength of cement concrete at 7 days and at 28 days is
option
1)3/4
2)2/3
3)1/2
4)1/3
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Q3 Modulus of elasticity of M25 concrete as determined by formula of IS :456 is
option
1) 124500 MPa
2) 90125 MPa
3) 28500 MPa
4) 16667 MPa
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Q4 General shrinkage in cement concrete is caused by
option
1)carbonation
2) stressed due to external load
3)drying with starting with a stiff consistency
4) drying with starting with a wetter consistency
Q5 The optimum number of revolution over which concrete is to be mixed in a mixer machine is
option
1)10
2)20
3)50
4)100
Q6 As per IS code of practice ,concrete should be cured at
option
1)5 ℃
2)10 ℃
3) 27 ℃
4) 40 ℃
Q7 The ratio of direct tensile strength to that of modulus of rupture of concrete is
option
1) .25
2).5
3).75
4)1.0
Q8 Which one of the following aggregate gives maximum strength in concrete ?
option
1)Rounded aggregate
2) Elongated aggregate
3) Flakey aggregate
4) Cubical
Q9 Which of the following types concrete is most suitable in extreme cold climates
option
1)Air- entrained concrete
2) Ready mix concrete
3) vacuum concrete
4) coarse concrete
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Q10 What is the range of fineness modulus of sand which is least suitable for making a good concrete
option
1) 3.5- 4.5
2) 2.9 - 3.2
3) 2.6 -2.9
4) 2.2 -2.6
answer
1)15 to 20 %
2)2/3
3)28500 MPa
4)drying with starting with a wetter consistency
5)20
6) 27 ℃
7).5
8)Cubical
9)Air- entrained concrete
10) 3.5- 4.5
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