The relationship between Young’s Modulus E, Modulus of Rigidity C and bulk modulus K in an elastic material is given by the relation

1.  E = 9KC/3K+C

2.  E = 3KC/3K+C

3.  E = 9KC/9K+C

4.  E = 3KC/9K+C

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4
Correct Answer :

E = 9KC/3K+C


Explanation :
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Which of the following statements are correct 1. In a ductile material elastic deformation is more predominant than plastic one. 2. Brittleness is not an absolute property of a metal. 3. Rate of loading has no influence in changing the behavior of a metal from ‘ductile’ to ‘brittle’ at low temperatures. 4. Under hydrostatic compression, a brittle metal may change into a ductile one.

1.  1 and 2

2.  2 and 3

3.  3 and 4

4.  2 and 4

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4
Correct Answer :

2 and 3


Explanation :
No Explanation available for this question

The total deflection of a structure when subjected simultaneously to different sets of loading is equal to the sum of the deflections under each such set of loads as if acting separately on the structure. Which one of the following justifies this statement

1.  Elastic limit is not exceeded

2.   Elastic limit including buckling is not exceeded.

3.  Limit state is not exceeded

4.  Proportional limit without buckling is not exceeded.

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4
Correct Answer :

Proportional limit without buckling is not exceeded.


Explanation :
No Explanation available for this question

A rectangular bar of cross-sectional area A is subjected to an axial tensile load P. The maximum shear stress will occur on a plane at X0 to any normal cross-section where X0 is

1.  900

2.  2700

3.  1800

4.  450

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4
Correct Answer :

450


Explanation :
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A solid circular shaft has been subjected to a pure torsion moment. The ratio of maximum shear stress to maximum normal stress at any point would be

1.  1:2

2.  1:1

3.  2:3

4.  2:1

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4
Correct Answer :

1:1


Explanation :
No Explanation available for this question

Which of the following statements are correct 1. All load carrying member transmit load through basic modes of tension, compression, torsion and shear only. 2. Beams carry transverse loads. 3. Combines loading is a complicated loading. 4. Nature of internal force decides the aspect of combined loading.

1.  1 and 2

2.  2 and 3

3.  3 and 4

4.  2 and 4

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4
Correct Answer :

1 and 2


Explanation :
No Explanation available for this question

A rectangular beam of dimensions b × d is to be cut from a circular log of wood of diameter D. For the beam to be strongest in bending, the dimensions will be

1.  D/√2 and D √2/3

2.  D/√3 and D √2/3

3.  D/√2 and √2D/3

4.  D/√3 and √2D/3

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4
Correct Answer :

D/√3 and D √2/3


Explanation :
No Explanation available for this question

Which of the following statements are correct 1. Experimental results on thin- walled tubes show that maximum normal stress theory is valid. 2. Normal stress theory is valid in case of brittle materials. 3. In case of pure shear, St. Venant’s theory is more valid than other theories. 4. Tresca’s theory is very closely substantiated by experimental results. 5. In maximum stress theory, the yield locus is a hexagon.

1.  1, 2 and 3

2.  2, 4 and 5

3.  1, 2 and 4

4.  2, 3 and 4

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4
Correct Answer :

1, 2 and 3


Explanation :
No Explanation available for this question

A thin cylindrical shell made of mild steel plate is 1000 mm in diameter. It is to be subjected to an internal pressure of 2 N/mm2. If the material yields at 200 N/mm2, the thickness of the plate in mm on the basis of Rankine’s theory of failure with assuming a factor of safety of 3 would be

1.  10

2.  12

3.  15

4.  18

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4
Correct Answer :

15


Explanation :
No Explanation available for this question

Consider the following statements with reference to a continuous beam supported at A, C and E for to which shear force diagram is shown in the below figure. There is: 1. A concentrated load acting at point B. 2. A concentrated load acting at point D. 3. A uniformly distributed load acting on the portion CE. Which of these statements are correct

1.  1, 2 and 3

2.  1 and 2 only

3.  2 and 3 only

4.  1 and 3 only

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4
Correct Answer :

1 and 3 only


Explanation :
No Explanation available for this question
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