Related Mcqs:

1. The relation between modulus of rupturefcr and characteristic strength of concrete fck is given by_______________?

   A. fcr=0.35Vf7
   B. fcr=0.57f7
   C. fcr=0.7Vf7
   D. fcr=1.2Vf7
   where fcr and fck are in N/mm2′

2. The approximate value of the ratio between direct tensile strength and flexural strength is_____________?

   A. 0.33
   B. 0.5
   C. 0.75
   D. 1.0

3. To determine the modulus of rupture, the size of test specimen used is_______________?

   A. 150 x150 x500 mm
   B. 100 x100 x700 mm
   C. 150 x150 x700 mm
   D. 100 x100 x500 mm

4. Modulus of rupture of concrete is a measure of_______________?

   A. flexural tensile strength
   B. direct tensile strength
   C. compressive strength
   D. split tensile strength

5. Which of the following has high tensile strength ?

   A. plain hot rolled wires
   B. cold drawn wires
   C. heat treated rolled wires
   D. all have same tensile strength

6. The strength of concrete after one year as compared to 28 days strength is about_______________?

   A. 10 to 15% more
   B. 15 to 20% more
   C. 20 to 25% more
   D. 25 to 50% more

7. As per Whitney’s theory, the maximum moment of resistance of the balanced section of a beam of width b and effective depth d is given by_______________?

   A. ^acybd2
   B. ^acybd2
   C. 0.185acybd2
   D. 0.43acybd2
   where acy is the cylinder compressive strength of concrete

8. According to IS : 456 -1978, the modulus of elasticity of concrete Ec (in N/mm2) can be taken as______________?

   A. Ec = = 5700
   B. Ec = = 570
   C. Ec = = 5700fck
   D. Ec = where fck N/mm2 = 700 is the characteristic strength in

9. The fineness modulus of fine aggregate is in the range of______________?

   A. 2.0 to 3.5
   B. 3.5 to 5.0
   C. 5.0 to 7.0
   D. 6.0 to 8.5

10. Modulus of elasticity of steel as per IS : 456-1978 shall be taken as______________?

    A. 20 kN/cm2
    B. 200 kN/cm2
    C. 200kN/mm2
    D. 2xl06N/cm2