As the percentage of steel increases________________?

Related Mcqs:

1. The system in which high tensile alloy steel bars (silica manganese steel) are used as prestressing tendons, is known as________________?

   A. Freyssinet system
   B. Magnel-Blaton system
   C. C.C.L. standard system
   D. Lee-McCall system

2. A simply supported beam 6 m long and of effective depth 50 cm, carries a uniformly distributed load 2400 kg/m including its self weight. If the lever arm factor is 0.85 and permissible tensile stress of steel is 1400 kg/cm2, the area of steel required, is___________________?

   A. 14 cm 2
   B. 15 cm2
   C. 16 cm2
   D. 17 cm2

3. If the permissible compressive and tensile stresses in a singly reinforced beam are 50 kg/cm2 and 1400 kg/cm2 respectively and the modular ratio is 18, the percentage area At of the steel required for an economic section, is__________________?

   A. 0.496 %

   B. 0.596 %

   C. 0.696 %

   D. 0.796 %

4. 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

5. The diameter of transverse reinforcement of columns should be equal to one-fourth of the diameter of the main steel rods but not less than________________?

   A. 4 mm
   B. 5 mm
   C. 6 mm
   D. 7 mm

6. The stresses developed in concrete and steel in reinforced concrete beam 25 cm width and 70 cm effective depth, are 62.5 kg/cm2 and 250 kg/cm 2 respectively. If m = 15, the depth of its neutral axis is_______________?

   A. 20 cm
   B. 25 cm
   C. 30 cm
   D. 35 cm

7. An intermediate T-beam reinforced with two layers of tensile steel with clear cover 13 cm encasted with the floor of a hall 12 metres by 7 metres, is spaced at 3 metres from adjoining beams and if the width of the beam is 20 cm, the breadth of the flange is__________________?

   A. 300 cm
   B. 233 cm
   C. 176 cm
   D. 236 cm

8. 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

9. Steel beam theory is used for_______________?

   A. Design of simple steel beams
   B. Steel beams encased in concrete
   C. Doubly reinforced beams ignoring compressive stress in concrete
   D. Beams if shear exceeds 4 times allowable shear stress

10. If the modular ratio is , steel ratio is and overall depth of a beam is , the depth of the critical neutral axis of the beam, is___________________?

    A. [m/(m – r)] d
    B. [m/(m + r)] d
    C. [(m + r)/ m] d
    D. [(r – m)/m] d