Important Questions about Structural Analysis -2

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28. A simply supported beam of span “L” carries a uniformly distributed load “W”, the maximum bending moment “M” is:

    1. WL4 / 2
    2. WL3 / 4
    3. WL2 / 8
    4. WL2 / 12
    5. WL 2/ 16

  WL2 / 8  

29. The _____________ beam theory provides a means of calculating the load – carrying and deflection characteristics of beams.

    1. Ferris -Witmer
    2. Galileo – Jacob
    3. Leonhard – Galilei
    4. Euler – Bernoulli

 Euler – Bernoulli 

30. Consider two beams with equal cross-sections, made of the same material, having the same support conditions, and each loaded with equal uniform load per length. One beam is twice as long as the other. The maximum bending stress in the longer beam is larger by a factor of:

    1. 1.25
    2. 1.50
    3. 2.00
    4. 4.00

                          4.00

31. In a two way slab the lifting of the edges of the slab occurs due:

    1. Resultant shear force at the ends
    2. Torsional moments on the slab
    3. Unbalanced moments on the slab
    4. Heavy shear load

Torsional moments on the slab 

32. A doubly reinforced beam is used when:

    1. Extra safety is needed
    2. Beam experience tension in top only
    3. Large moment is experienced by the beam
    4. Depth and width of the beams have to be restricted in size

Depth and width of the beams have to be restricted in size 

33. Law of elasticity states that the extension of a spring is in direct proportion with the load applied to it.

    1. Young’s
    2. Robert’s
    3. Hooke’s
    4. Poisson’s

 

Hooke’s 

34. The moment diagram for a simply-supported with a load at the mid-point is

    1. Triangle
    2. Parabola
    3. Trapezoid
    4. Rectangle
    5. Semicircle

Triangle 

35. What is not true about moment frame buildings?

    1. Need less steel compared to braced frame structure
    2. More labor intensive than braced frame structure
    3. Larger deflections can be expected compared to braced frame structure
    4. Easy to design doorways and windows

Need less steel compared to braced frame structure 

36. The slab is designed as one way if the ratio of long span to short span is:

    1. Less than 1
    2. Between 1 and 1.5
    3. Between 5 and 1.2
    4. Greater Than 2

 

Greater Than 2 

37. Calculate the moments MB.

       1. 5 ft.kips
       2. 35 ft.kips
       3. kips
       4. Zero

35 ft.kips 

38. For the beam loaded as shown in the figure below, the bending moment at x = 5ft. from the left support is most nearly:

 1. 160 kip ft

2. 190 ft kip)              

3.   236 kip ft

4. 270 kip ft 

190 kip ft 

39. A beam is loaded as shown. A distributed load of 60 lbs/ft is applied and a concentrated load of 570 lbs applied at 5 ft from point A. Find the maximum bending moment.

  1. 2440 lbs.ft
  2. 2954 lps.ft
  3. 2760 lps.ft
  4. 3800 lbs.ft

2954 lps.ft 

40. A beam is loaded as shown. Find the maximum shear force of the beam shown.

  1. 450 lbs
  2. 390 lbs
  3. 780 lbs
  4. 810 lbs

390 lbs 

41. Find the deflection at the end of the hollow rectangular section shown. Outside dimensions of the section is 12 × 12 inches and the thickness is 0.25 inches. The young ‘s modulus of steel is 29 × 106

Y1 = Wl4/8El , Y2=PL3/3EI,  I=207.125 in4

  1. 1.23 in
  2. 0.149 in
  3. 0.453 in
  4. 1.67 in

0.149 in 

42. For the Beam shown below, use the Muller-Breslau principle for the influence lines to answer the following

The dotted lines shown on the beam above, describe the influence line for:

    1. The shear at d
    2. The moment at b
    3. The moment at d
    4. Vertical reaction at support

The moment at b 

43. Calculate the maximum moment (Values are given for loads & dimensions)

    1. BM WL2/2 + PL/2
    2. BM WL4/2 + PL/4
    3. BM WL6/2 + PL/3
    4. BM WL4/2 + PL/2

Max. BM  WL2/2 + PL/2 

44. Calculate the (Values are given for loads & dimensions)

  1. BM WL4/2 + PL2
  2. BM WL2/2 + PL
  3. BM WL6/2 + PL3
  4. BM WL4/2 + PL4

Max. BM  WL2/2 + PL

45. Calculate Stress on Surface?

    1. Weight divide by area
    2. Weight multiple by area
    3. Weight add by area
    4. Wight deduct by area

Weight divide by area 

46. A Cantilever beam with a rectangular cross-section is subjected to a concentrated load at its free end .If the width of the beam is doubled ,the deflection of the free end will be changed in the ratio of :

    1. 8
    2. 1/8
    3. 1/2
    4. 2
  2.  

                1/2

47. The bending moment is maximum on a section where shearing force is:

    1. Maximum
    2. Minimum
    3. Changing Sign
    4. None of the above

Changing Sign 

48. What is the common yield strength of reinforcement steel?

    1. 100 MPa
    2. 200 MPa
    3. 275 MPa
    4. 460 MPa

460 MPa 

49. What is the maximum allowable moment redistribution in RCC beams?

    1. 10 %
    2. 20 %
    3. 30 %
    4. 40 %

        20 %

50. Generally, weight of reinforcement concrete in Kg/m3is:

    1. 1500
    2. 1600
    3. 2000
    4. 2400

 

2400 


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