Correct Answer:
It regains its original shape on removal of the load
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2. The tangential component of stress on an plane inclined θ° to the direction of the force, may be obtained by multiplying the normal stress by
Answer
Correct Answer:
Sin θ cos θ
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3. For determining the support reactions at A and B of a three hinged arch, points B and C are 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
Answer
Correct Answer:
90°
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4. In plastic analysis, the shape factor for a triangular section, is
Answer
Correct Answer:
2.34
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5. Beams composed of more than one material, rigidly connected together so as to behave as one piece, are known as
Answer
Correct Answer:
Composite beams.
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6. If ΣH and ΣV are the algebraic sums of the forces resolved horizontally and vertically respectively, and ΣM is the algebraic sum of the moments of forces about any point, for the equilibrium of the body acted upon
Answer
Correct Answer:
All these
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7. If Q is load factor, S is shape factor and F is factor of safety in elastic design, the following:
Answer
Correct Answer:
Q = S x F
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8. Stress may be expressed in Newtons
Answer
Correct Answer:
Per millimetre square (N/mm2)
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9. He general expression for the B.M. of a beam of length l is the beam carries M= wl/2 x- wx2/2
Answer
Correct Answer:
A uniformly distributed load w/unit length
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10. Shear strain energy theory for the failure of a material at elastic limit, is due to
Answer
Correct Answer:
Guest or Trecas
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11. A load of 1960 N is raised at the end of a steel wire. The minimum diameter of the wire so that stress in the wire does not exceed 100 N/mm2 is :
Answer
Correct Answer:
5.0 mm
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12. In plastic analysis, the shape factor for a circular section, is
Answer
Correct Answer:
1.7
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13. If a solid shaft (diameter 20 cm, length 400 cm, N = 0.8 x 105 N/mm2) when subjected to a twisting moment, produces maximum shear stress of 50 N/mm2, the angle of twist in radians, is
Answer
Correct Answer:
0.0025
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14. Pick up the incorrect statement from the following : The torsional resistance of a shaft is directly proportional to
Answer
Correct Answer:
Moment of inertia of the shaft section.
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15. A steel rod 1 metre long having square cross section is pulled under a tensile load of 8 tonnes. The extension in the rod was 1 mm only. If Esteel = 2 x 106 kg/cm2, the side of the rod, is
Answer
Correct Answer:
2 cm
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16. Pick the correct statement from the following:
Answer
Correct Answer:
The point of intersection of the bending axis with the cross section of the beam, is called shear centre
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17. 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
Answer
Correct Answer:
35 N
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18. Pick up the correct statement from the following:
Answer
Correct Answer:
The ratio of plastic moment to the yield moment, is called shape factor
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19. The point of contraflexure is the point where
Answer
Correct Answer:
B.M. changes sign
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20. A rolled steel joist is simply supported at its ends and carries a uniformly distributed load which causes a maximum deflection of 10 mm and slope at the ends of 0.002 radian. The length of the joist will be,
Answer
Correct Answer:
16 m
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