For determining the support reactions at A and B of a three hinged arch, points B and Care joined and produced to intersect the load line at D and a line parallel to the load line through A at D’. Distances AD, DD’ and AD’ when measured were 4 cm, 3 cm and 5 cm respectively. The angle between the reactions at A and B is___________________?

Related Mcqs:

1. An isolated load W is acting at a distance a from the left hand support, of a three hinged arch of span 2l and rise h hinged at the crown, the horizontal reaction at the support, is_________________?

   A. Wa/h
   B. Wa/2h
   C. 2W/ha
   D. 2h/Wa

2. A short column (30 cm × 20 cm) carries a load P 1 at 4 cm on one side and another load P2at 8 cm on the other side along a principal section parallel to longer dimension. If the extreme intensity on either side is same, the ratio of P1 to P2 will be_________________?

   A. 2/3
   B. 3/2
   C. 8/5
   D. 5/8

3. A two hinged parabolic arch of span l and rise h carries a load varying from zero at the left end to________________?

   A. /4h thrust is
   B. /8h
   C. /12h
   D. /16h

4. The horizontal deflection of a parabolic curved beam of span 10 m and rise 3 m when loaded with a uniformly distributed load l t per horizontal length is (where Ic is the M.I. at the crown, which varies as the slope of the arch)___________________?

   A. 50/EIc
   B. 100/EIc
   C. 150/EIc
   D. 200/EIc

5. The maximum B.M. due to an isolated load in a three hinged parabolic arch, (span l and rise h) having one of its hinges at the crown, occurs on either side of the crown at a distance_______________?

   A. l/4
   B. h/4
   C. l
   D. l

6. If a three hinged parabolic arch, (span l, rise h) is carrying a uniformly distributed load w/unit length over the entire span__________________?

   A. Horizontal thrust is wl2/8h
   B. S.F. will be zero throughout
   C. B.M. will be zero throughout
   D. All the above

7. The ratio of the stresses produced by a suddenly applied load and by a gradually applied load on a bar, is__________________?

   A. 1/4
   B. 1/2
   C. 1
   D. 2

8. There are two hinged semicircular arches A, B and C of radii 5 m, 7.5 m and 10 m respectively and each carries a concentrated load W at their crowns. The horizontal thrust at their supports will be in the ratio of_______________?

   A. 1 : 1½ : 2
   B. 2 : 1½ : 1
   C. 1 : 1 : 2
   D. None of these

9. The locus of reaction of a two hinged semi-circular arch, is_________________?

   A. Straight line
   B. Parabola
   C. Circle
   D. Hyperbola

10. The horizontal thrust on the ends of a two hinged semicircular arch of radius carrying_________________?

    A. A uniforml 4/3
    B. end, is
    C. All the above
    D. non of these