The greatest load which a spring can carry without getting permanently distorted, is called_________________?

Related Mcqs:

1. The strain energy stored in a spring when subjected to greatest load without being permanently distorted, is called______________?

   A. Stiffness
   B. Proof resilience
   C. Proof stress
   D. Proof load

2. A close coil helical spring of mean diameter D consists of n coils of diameter d. If it carries an axial load W, the energy stored in the spring, is______________?

   A. 4WD²n/d4N
   B. 4W²Dn/d4N
   C. 4W²D3n/d4N
   D. 4W²D3n²/d4N

3. The load on a spring per unit deflection, is called______________?

   A. Stiffness
   B. Proof resilience
   C. Proof stress
   D. Proof load

4. A spring of mean radius 40 mm contains 8 action coils of steel (N = 80000 N/mm2), 4 mm in diameter. The clearance between the coils being 1 mm when unloaded, the minimum compressive load to remove the clearance, is_____________?

   A. 25 N
   B. 30 N
   C. 35 N
   D. 40 N

5. A simply supported beam A carries a point load at its mid span. Another identical beam B carries the same load but uniformly distributed over the entire span. The ratio of the maximum deflections of the beams A and B, will be________________?

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

6. A simply supported uniform rectangular bar breadth b, depth d and length L carries an isolated load W at its mid-span. The same bar experiences an extension e under same tensile load. The ratio of the maximum deflection to the elongation, is________________?

   A. L/d
   B. L/2d
   C. (L/2d)²
   D. (L/3d)²

7. 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___________________?

   A. 30°
   B. 45°
   C. 60°
   D. 90°

8. The ratio of the maximum deflections of a simply supported beam with a central load W and of a cantilever of same length and with a load W at its free end, is________________?

   A. 1/8
   B. 1/10
   C. 1/12
   D. 1/16

9. 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

10. 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