GATE ME topic:manufacturing PYQs & Answers — Page 93

Questions 921–930 of 1040. Imported answers require independent review unless marked reviewed.

Topic practice 1040 questionsPage 93 of 104

For steady flow of a viscous incompressible fluid through a circular pipe of constant diameter, the average velocity in the fully developed region is constant. Which one of the following statements about the average velocity in the developing region is TRUE?

Your answerChoose one option.

It increases until the flow is fully developed.

It is constant and is equal to the average velocity in the fully developed region.

It decreases until the flow is fully developed.

It is constant but is always lower than the average velocity in the fully developed region.

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A mass

is attached to two identical springs having spring constant

as shown in the figure

Diagram for Mechanical Engineering question 6

. The natural frequency

of this single degree of freedom system is

Your answerChoose one option.

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Consider the two-dimensional velocity field given by

, where

and

are constants. Which one of the following conditions needs to be satisfied for the flow to be incompressible?

Your answerChoose one option.

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The state of stress at a point is

and

. The maximum normal stress (in MPa) at that point is __________

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Water (density = 1000 kg/m

) at ambient temperature flows through a horizontal pipe of uniform cross section at the rate of 1 kg/s. If the pressure drop across the pipe is 100 kPa, the minimum power required to pump the water across the pipe, in watts, is ______

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For a loaded cantilever beam of uniform cross-section, the bending moment (in N·mm) along the length is

, where

is the distance (in mm) measured from the free end of the beam. The magnitude of shear force (in N) in the cross-section at

is __________

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Which one of the following is NOT a rotating machine?

Your answerChoose one option.

Centrifugal pump

Gear pump

Jet pump

Vane pump

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A cantilever beam of length

and flexural modulus

is subjected to a point load

at the free end. The elastic strain energy stored in the beam due to bending (neglecting transverse shear) is

Your answerChoose one option.

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Saturated steam at 100°C condenses on the outside of a tube. Cold fluid enters the tube at 20 °C and exits at 50 °C. The value of the Log Mean Temperature Difference (LMTD) is ______ °C.

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A steel bar is held by two fixed supports as shown in the figure

Diagram for Mechanical Engineering question 10

and is subjected to an increase of temperature

. If the coefficient of thermal expansion and Young’s modulus of elasticity of steel are

and

, respectively, the magnitude of thermal stress (in MPa) induced in the bar is __________

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GATE ME topic:manufacturing PYQs

Question 6

Question 6

Question 7

Question 7

Question 8

Question 8

Question 9

Question 9

Question 10

Question 10