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Strength of Materials - Section 1 (3)

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Strength of Materials - Section 1

Here you will find all the important problems and questions of s
Strength of Material. We provide all the necessary questions which are asked in exam.

17. 

The deflection of any rectangular beam simply supported, is

A. directly proportional to its weight
B. inversely proportional to its width
C. inversely proportional to the cube of its depth
D. directly proportional to the cube of its length
E. none of these.

Answer: Option C

Explanation:

No answer description available for this question. Let us discuss.

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18. 

For a simply supported beam of length L, the bending moment M is described as M = a (x - x3/L2), 0 ≤ x < L; where a is a constant. The shear force will be zero at

 

A. the supports
B. x = L/2
C. x = L/√3
D. x = L/3

Answer: Option C

Explanation:

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19. 

If the width of a simply supported beam carrying an isolated load at its centre is doubled, the deflection of the beam at the centre is changed by

A. 1/2
B. 1/8
C. 2
D. 8
E. 4

Answer: Option A

Explanation:

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20. 

If a shaft is rotating N revolutions per minute with an applied torque T kg-m, the horse power being transmitted by the shaft, is

A. 135-6.162-1
B. 135-6.162-2
C. 135-6.162-3
D. 135-6.162-4
E. none of these.

Answer: Option C

Explanation:

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21. 

The force in member U2L2 of the truss shown in below figure, is

139-6.205-1

A. 10 T tension
B. 10 T compression
C. zero
D. 15 T compression.

Answer: Option B

Explanation:

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22. 

The ratio of the moment of inertia of a circular plate and that of a square plate for equal depth, is

A. less than one
B. equal to one
C. more than one
D. equal to 3π/16
E. none of these.

Answer: Option D

Explanation:

For circular plate, MI = π*d^4/64.

For square plate, MI = d^4/12.

So, Ratio = MI of circular plate/MI of square plate.

= 3*π/16.

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23. 

For a given material Young's modulus is 200 GN/m2 and modulus of rigidity is 80 GN/m2. The value of Poisson's ratio is

A. 0.15
B. 0.20
C. 0.25
D. 0.30
E. 0.40

Answer: Option C

Explanation:

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24. 

For a simply supported beam with a central load, the bending moment is

A. least at the centre
B. least at the supports
C. maximum at the supports
D. maximum at the centre.

Answer: Option D

Explanation:

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