Theory of Structures - Section 1 (2)

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Theory of Structures - Section 1

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A shaft is subjected to bending moment M and a torque T simultaneously. The ratio of the maximum bending stress to maximum shear stress developed in the shaft, is

A.
B.
C.
D.

Answer: Option C

Explanation:

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10.

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

Answer: Option C

Explanation:

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11.

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 : 1 1/2 : 2
B.	2 : 1 1/2 : 1
C.	1 : 1 : 2
D.	none of these.

Answer: Option C

Explanation:

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12.

The force in AD of the truss shown in given figure, is

90-21-106-1

A.	4.0t compression
B.	3.0t compression
C.	0.5t compression
D.	0.5t tension
E.	zero.

Answer: Option C

Explanation:

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13.

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

A.	sin θ
B.	cos θ
C.	tan θ
D.	sin θ cos θ
E.	sin2θ

Answer: Option E

Explanation:

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14.

Two bars, one of steel and the other of copper having areas of cross-sections A_s and A_c, coefficient of expansion αs and αc and Young's Modulii E_s and E_s are rigidly connected together at the ends and subjected to temperature change of t°. If the length of the bars initially is L, the final extension δ of the two bars at t° temperature is given by

A.
B.
C.
D.

Answer: Option A

Explanation:

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15.

The maximum magnitude of shear stress due to shear force F on a rectangular section of area A at the neutral axis, is

A.
B.
C.
D.

Answer: Option C

Explanation:

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16.

Pick up the correct statement from the following:

A.	In a loaded beam, the moment at which the first yield occurs is called yield moment
B.	In a loaded beam, the moment at which the entire section of the beam becomes fully plastic, is called plastic moment
C.	In a fully plastic stage of the beam, the neutral axis divides the section in two sections of equal area
D.	The ratio of plastic moment to the yield moment, is called shape factor
E.	All the above.

Answer: Option E

Explanation:

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Theory of Structures - Section 1 (2)

Theory of Structures - Section 1

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