11. The following figure shows a schematic representation of a steel plate girder to be used as a simply supported beam with a concentrated load. For stiffeners, PQ (running along the beam axis) and RS (running between the top and bottom flanges), which of the following pairs of statements will be TRUE?
    

1. 1. (i) RS should be provided under the concentrated load only
      (ii) PQ should be placed in the tension side of the flange

   
   
   

   2. (i) RS helps to prevent local buckling of the web
      (ii) PQ should be placed in the compression side of the flange

   
   
   

   3. (i) RS should be provided at supports
      (ii) PQ should be placed along the neutral axis

   
   
   

   4. (i) RS should be provided away from points of action of concentrated loads
      (ii) PQ should be provided on the compression side of the flange

   
   
   

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1. View Hint View Answer Discuss in Forum

   (i) RS helps to prevent local buckling of the web
   (ii) PQ should be placed in the compression side of the flange

   Correct Option: B

   (i) RS helps to prevent local buckling of the web
   (ii) PQ should be placed in the compression side of the flange

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12. The cross-section of a thermo-mechanically treated (TMT) reinforcing bar has

1. 1. soft ferrite-pearlite throughout

   
   
   

   2. hard martensite throughout

   
   
   

   3. a soft ferrite-pearlite core with a hard martensitic rim

   
   
   

   4. a hard martensitic core with a soft pearlite-bainitic rim

   
   
   

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1. View Hint View Answer Discuss in Forum

   a soft ferrite-pearlite core with a hard martensitic rim

   Correct Option: C

   a soft ferrite-pearlite core with a hard martensitic rim

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13. A 16 mm thick plate measuring 650 mm × 420 mm is used as a base plate for an ISHB 300 column subjected to a factored axial compressive load of 2000 kN. As per IS: 456-2000, the minimum grade of concrete that should be used below the base plate for safely carrying the load is

1. 1. M15

   
   
   

   2. M20

   
   
   

   3. M30

   
   
   

   4. M40

   
   
   

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1. View Hint View Answer Discuss in Forum

   M20

   Correct Option: B

   M20

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14. Consider the following statements:
    I. The width-thickness ratio limitations on the plate elements under compression in steel members are imposed by IS: 800-1984 in order to avoid fabrication difficulties.
    II. In a doubly reinforced concrete beam, the strain in compressive reinforcement is higher than the strain in the adjoining concrete.
    III. If a cantilever I section supports slab construction all along its length with sufficient friction between them, the permissible bending stress in compression will be the same as that in tension.
    The TRUE statements are

1. 1. Only I and II

   
   
   

   2. Only II and III

   
   
   

   3. Only I and III

   
   
   

   4. I, II and III

   
   
   

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1. View Hint View Answer Discuss in Forum

   Only II and III

   Correct Option: B

   Only II and III

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15. A streel beam (with a constant El, and span L) is fixed at both ends and carries a uniformly distributed load (w kN/m), which is gradually increased till the beam reaches the stage of plastic collapse (refer to the following figure). Assuming ‘B’ to be at mid-span, which of the following is true.
    

1. 1. Hinges are formed at A, B and C together.

   
   
   

   2. Hinges are formed at B and then at A and C together.

   
   
   

   3. Hinges are formed at A and C together and then at B.

   
   
   

   4. Hinges are formed at A and C only.

   
   
   

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1. View Hint View Answer Discuss in Forum

   Initially hinges will be at A and C. Then it becomes a simply supported beam. Then the plastic hinge will form at B.

   Correct Option: C

   Initially hinges will be at A and C. Then it becomes a simply supported beam. Then the plastic hinge will form at B.

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