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  • Question

  • P is the prestressed force applied to tendon of a rectangular prestressed beam whose area of cross section is A and sectional modulus is Z. The minimum stress f on the beam subjected to a maximum bending moment M is


  • Options
  • A. P is the prestressed force applied to tendon of a rectangular prestressed beam whose area of cross s
  • B. P is the prestressed force applied to tendon of a rectangular prestressed beam whose area of cross s
  • C. P is the prestressed force applied to tendon of a rectangular prestressed beam whose area of cross s
  • D. P is the prestressed force applied to tendon of a rectangular prestressed beam whose area of cross s
  • E.

  • Correct Answer
  •  

    • RCC Structures Design problems

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    • 1. The pitch of the main bars in a simply supported slab, should not exceed its effective depth by

    • Options
    • A. three times
    • B. four times
    • C. five times
    • D. six times
    • E. seven times.
      • Discuss
    • 2. If permissible compressive stress in concrete is 50 kg/cm2, tensile stress in steel is 1400 kg/cm2 and modular ratio is 18, the depth d of the beam, is

    • Options
    • A.
    • B.
    • C.
    • D.
    • E.
      • Discuss
    • 3. The modular ratio m of a concrete whose permissible compressive stress is C, may be obtained from the equation.

    • Options
    • A.
    • B.
    • C.
    • D.
    • E.
      • Discuss
    • 4. A very comfortable type of stairs is

    • Options
    • A. straight
    • B. dog legged
    • C. geometrical
    • D. open newel.
      • Discuss
    • 5. Steel bars are generally connected together to get greater length than the standard length by providing

    • Options
    • A. strainght bar splice
    • B. hooked splice
    • C. dowel splice
    • D. all the above
      • Discuss
    • 6. The section of a reinforced beam where most distant concrete fibre in compression and tension in steel attains permissible stressess simultaneously, is called

    • Options
    • A. balanced section
    • B. economic section
    • C. critical section
    • D. all the above.
      • Discuss
    • 7. The maximum permissible size of aggregates to be used in casting the ribs of a slab, is

    • Options
    • A. 5 mm
    • B. 7.5 mm
    • C. 10 mm
    • D. 15 mm
    • E. 20 mm
      • Discuss
    • 8. In a simply supported slab, alternate bars are curtailed at

    • Options
    • A. 1/4th of the span
    • B. 1/5th of the span
    • C. 1/6th of the span
    • D. 1/7th of the span
    • E. none of these.
      • Discuss
    • 9. The diameter of main bars in R.C.C. columns, shall not be less than

    • Options
    • A. 6 mm
    • B. 8 mm
    • C. 10 mm
    • D. 12 mm
      • Discuss
    • 10. In the zone of R.C.C. beam where shear stress is less than 5 kg/cm2, nominal reinforcement is provided at a pitch of

    • Options
    • A. one-half lever arm of the section
    • B. one-third lever arm of the section
    • C. lever arm of the section
    • D. one and half lever arm of the section.
      • Discuss

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