# 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

4

E = 9KC/3K+C

Explanation :
No Explanation available for this question

# 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

4

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.

4

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

4

450

Explanation :
No Explanation available for this question

# 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

4

1:1

Explanation :
No Explanation available for this question

1.  1 and 2

2.  2 and 3

3.  3 and 4

4.  2 and 4

4

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

4

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

4

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

4

15

Explanation :
No Explanation available for this question

1.  1, 2 and 3

2.  1 and 2 only

3.  2 and 3 only

4.  1 and 3 only

4