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____________________?

Related Mcqs:

1. 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

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

   A. l = dt/Sb
   B. l = dt/2Sb
   C. l = dt/3Sb
   D. l = dt/4Sb

3. 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

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. The anchorage value of a hook is assumed sixteen times the diameter of the bar if the angle of the bend, is___________________?

   A. 30°
   B. 40°
   C. 45°
   D. All the above

6. The section of a reinforced beam where most distant concrete fibre in compression and tension in steel attains permissible stresses simultaneously, is called_________________?

   A. Balanced section
   B. Economic section
   C. Critical section
   D. All the above

7. Steel bars are generally connected together to get greater length than the standard length by providing_______________?

   A. Straight bar splice
   B. Hooked splice
   C. Dowel splice
   D. All the above

8. The modular ratio m of a concrete whose permissible compressive stress is C, may be obtained from the equation.

   A. m = 700/3C
   B. m = 1400/3C
   C. m = 2800/3C
   D. m = 3500/3C

9. If the permissible compressive stress for a concrete in bending is C kg/m2, the modular ratio is_____________?

   A. 2800/C
   B. 2300/2C
   C. 2800/3C
   D. 2800/C2

10. In a singly reinforced beam, if the permissible stress in concrete reaches earlier than that in steel, the beam section is called________________?

    A. Under-reinforced section
    B. Over reinforced section
    C. Economic section
    D. Critical section