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QUESTION: 1

The specific speed of a turbine is defined as the speed of a unit of such a size that it

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QUESTION: 2

What is the condition for maximum transmission of power through a nozzle at the end of a long pipe?

Solution:

QUESTION: 3

Which one of the following velocity fields represents a possible fluid flow?

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QUESTION: 4

Two long columns C_{1} and C_{2 }are made of the same material. Column C_{1} has both the ends hinged while column C_{2} has one end hinged and the other end fixed. What is the ratio of the critical load for C_{1} to that for C_{2} according to Euler’s formula?

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QUESTION: 5

From a cicular plate of diameter D,whose center is C, another cicular plate of diameter AC is cut ,removed and kept over CB,The thickness of the plate is uniform. The shift of the centroid due to this will be

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QUESTION: 6

A cantilever is subjected to a uniformly distributed load W over its whole length L and a concentrated upward force W at its free end. The deflection of the free end is

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QUESTION: 7

The deformation of the bar under its own weight as compared to that when subjected to a direct axial load equal to its own weight will be

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QUESTION: 8

A thin cylindrical shell of internal diameter D with t is subjected to internal pressure p. The change in diameter is

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QUESTION: 9

A material having modulus of elasticity 200 GN/m^{2} and Poissons ratio 0.25 will have modulus of rigidity

Solution:

*Answer can only contain numeric values

QUESTION: 10

A simply supported beam AB is loaded as shown in the figure below.

What is the shear force (SF) in kN in the portion AC of the beam?

Solution:

*Answer can only contain numeric values

QUESTION: 11

A shaft is initially subjected to bending moment and then to torsion. In that case, if the magnitude of bending moment is found to be the same as that of torque, then the ratio of maximum bending stress to shear stress would be

Solution:

QUESTION: 12

A steel rod, 100 mm long, is held between two rigid supports. It is heated to 20°C. If the coefficient of thermal expansion of the material of the rod is 15 x 10^{-}^{6}/°C and the modulus of elasticity is 200 x 103 MN/m^{2}, what is the stress in the rod?

Solution:

QUESTION: 13

A mild steel bar of square cross-section 40 mm x 40 mm is 400 mm long. It is subjected to a longitudinal tensile stress of 440 N/mm^{2} and a lateral compressive stress of 200 N/mm^{2} in perpendicular directions. E = 2 x 10^{-}^{5} N/ mm^{2}, μ = 0.3. What is the approximate elongation of the bar in the longitudinal direction?

Solution:

= 2.5 x 10^{-3} x 400 = 1mm

QUESTION: 14

At a certain point in a structural member, there are perpendicular stresses 80 N/mm^{2} and 20 N/mm^{2}, both tensile. What is the equivalent stress in simple tension, according to the maximum principal strain theory? (Poisson’s ratio = 0.25)

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QUESTION: 15

The free end of a cantilever beam is supported by the free end of another cantilever beam using a roller as shown in the figure given below. What is the deflection at the roller support B?

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QUESTION: 16

Mohar's Circle given below corresponds to which one of the following stress conditions?

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QUESTION: 17

A 2-m long rod at a temperature of 10°C is allowed to expand with temperature rising to 80°C. (E = 100,000 MN/m^{2} and X= 0.000012°C)

Q. The expension of the rod due to the rise in temperature will be

Solution:

QUESTION: 18

A 2-m long rod at a temperature of 10°C is allowed to expand with temperature rising to 80°C. (E = 100,000 MN/m^{2} and X= 0.000012°C)

Q. The stress in the rod, if expansion is not allowed, will be

Solution:

QUESTION: 19

Match list I with list II and select the correct answer using the codes given below:

Codes: ABCD

Solution:

QUESTION: 20

Match list I with list II and select the correct answer using the codes given below:

List I

Codes: ABCD

Solution:

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