If Sb, is the average bond stress on a bar of diameter subjected to maximum stress , the length of the embedment is given by_____________?

Related Mcqs:

1. If the average bending stress is 6 kg/cm2 for M 150 grade concrete, the length of embedment of a bar of diameter d according to I.S. 456 specifications, is__________________?

   A. 28 d
   B. 38 d
   C. 48 d
   D. 58 d

2. The length of the lap in a compression member is kept greater than bar diameter x (Permissible stress in bar / Five times the bond stress) or____________________?

   A. 12 bar diameters
   B. 18 bar diameters
   C. 24 bar diameters
   D. 30 bar diameters

3. The length of lap in tension reinforcement should not be less than the bar diameter × (actual tension / four times the permissible average bond stress) if it is more than_______________?

   A. 18 bar diameters
   B. 24 bar diameters
   C. 30 bar diameters
   D. 36 bar diameters

4. The minimum thickness of the cover at the end of a reinforcing bar should not be less than twice the diameter of the bar subject to a minimum of___________________?

   A. 10 mm
   B. 15 mm
   C. 20 mm
   D. 25 mm

5. is the pre-stressed force applied to the tendon of a rectangular pre-stressed beam whose area of cross section is and sectional modulus is . The maximum stress in the beam, subjected to a maximum bending moment , is_________________?

   A. f = (P/A) + (Z/M)
   B. f = (A/P) + (M/Z)
   C. f = (P/A) + (M/Z)
   D. f = (P/A) + (M/6Z)

6. The maximum diameter of a bar used in a ribbed slab, is______________?

   A. 12 mm
   B. 6 mm
   C. 20 mm
   D. 22 mm

7. is the pre- stressed force applied to tendon of a rectangular pre-stressed beam whose area of cross section is and sectional modulus is . The minimum stress on the beam subjected to a maximum bending moment is________________?

   A. f = (P/A) – (Z/M)
   B. f = (A/P) – (M/Z)
   C. f = (P/A) – (M/Z)
   D. f = (P/A) – (M/6Z)

8. If the maximum shear stress at the end of a simply supported R.C.C. beam of 16 m effective span is 10 kg/cm2, the length of the beam having nominal reinforcement, is________________?

   A. 8 cm
   B. 6 m
   C. 8 m
   D. 10 m

9. If W is total load per unit area on a panel, D is the diameter of the column head, L is the span in two directions, then the sum of the maximum positive bending moment and average of the negative bending moment for the design of the span of a square flat slab, should not be less than________________?

   A. WL/12 (L – 2D/3)²
   B. WL/10 (L + 2D/3)²
   C. WL/10 (L – 2D/3)²
   D. WL/12 (L – D/3)²

10. If diameter of a reinforcement bar is d, the anchorage value of the hook is_______________?

    A. 4d
    B. 8d
    C. 12d
    D. 16d