A. ±5% of average
B. ± 10% of average
C. ± 15% of average
D. ±20% of average
Related Mcqs:
- The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by_______________?
A. tcr – rcs = tct
B. fcr>fcs>fc
C. fcr<fcs
D. fc5>fcr>fC - 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 - Lap length in compression shall not be less than______________?
A. 15 4>
B. 20
C. 24 (j)
D. 30 (j)where (j) is diameter of bar
- In reinforced concrete footing on soil, the minimum thickness at edge should not be less than______________?
A. 100 mm
B. 150 mm
C. 200 mm
D. 250 mm - 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 - 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′ - The compressive strength of 100 mm cube as compared to 150 mm cube is always_______________?
A. less
B. more
C. equal
D. none of the above - According to IS : 456-1978, the fiexural strength of concrete is________________?
A. directly proportional to compressive strength
B. inversely proportional to compressive strength
C. directly proportional to square root of compressive strength
D. inversely proportional to square root of compressive strength - If the storey height is equal to length of RCC wall, the percentage increase in strength is_____________?
A. 0
B. 10
C. 20
D. 30 - If nominal shear stress tv exceeds the design shear strength of concrete xc, the nominal shear reinforcement as per IS : 456-1978 shall be provided for carrying a shear stress equal to__________________?
A. xv
B. xc
C. xv – TC
D. Tv + Tc
