Civil Engineering - Theory of Structures

Exercise :: Theory of Structures - Section 3

41. 

A steel bar 20 mm in diameter simply-supported at its ends over a total span of 40 cm carries a load at its centre. If the maximum stress induced in the bar is limited to N/mm2, the bending strain energy stored in the bar, is

A. 411 N mm
B. 511 N mm
C. 611 Nmm
D. 711 N mm

Answer: Option C

Explanation:

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42. 

The deflection curve for the portal frame shown in the given figure is

A.
B.
C.
D.

Answer: Option D

Explanation:

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43. 

A close coil helical spring when subjected to a moment M having its axis along the axis of the helix

A. it is subjected to pure bending
B. its mean diameter will decrease
C. its number of coils will increase
D. all the above.

Answer: Option A

Explanation:

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44. 

For beams breadth is constant,

A. depth dM
B. depth dM
C. depth d ∝ 3 M
D. depth d

Answer: Option B

Explanation:

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45. 

A body is said to be in equilibrium if

A. it moves horizontally
B. it moves vertically
C. it rotates about its C.G.
D. none of these.

Answer: Option D

Explanation:

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