GATE ME topic:mechanical-engineering PYQs & Answers — Page 22

Questions 211–220 of 1040. Imported answers require independent review unless marked reviewed.

The effective stiffness of a cantilever beam of length

and flexural rigidity

subjected to a transverse tip load

Diagram for Mechanical Engineering question 16

Your answerChoose one option.

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The options show frames consisting of rigid bars connected by pin joints. Which one of the frames is non-rigid?

Your answerChoose one option.

Diagram for Mechanical Engineering question 17

Diagram for Mechanical Engineering question 17 (figure 2)

Diagram for Mechanical Engineering question 17 (figure 3)

Diagram for Mechanical Engineering question 17 (figure 4)

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The S-N curve from a fatigue test for steel is shown. Which one of the options gives the endurance limit?

Diagram for Mechanical Engineering question 18

Your answerChoose one option.

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Air (density = 1.2 kg/m

, kinematic viscosity = 1.5×10

/s) flows over a flat plate with a free-stream velocity of 2 m/s. The wall shear stress at a location 15 mm from the leading edge is

. What is the wall shear stress at a location 30 mm from the leading edge?

Your answerChoose one option.

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Consider an isentropic flow of air (ratio of specific heats = 1.4) through a duct as shown in the figure.

The variations in the flow across the cross-section are negligible. The flow conditions at Location 1 are given as follows:

kPa,

kg/m

m/s

The duct cross-section area at Location 2 is given by A₂ = 2A₁, where A₁ denotes the duct cross-section area at Location 1. Which one of the given statements about the velocity

and pressure

at Location 2 is TRUE?

Diagram for Mechanical Engineering question 20

Your answerChoose one option.

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Consider incompressible laminar flow of a constant property Newtonian fluid in an isothermal circular tube. The flow is steady with fully-developed temperature and velocity profiles. The Nusselt number for this flow depends on

Your answerChoose one option.

neither the Reynolds number nor the Prandtl number

both the Reynolds and Prandtl numbers

the Reynolds number but not the Prandtl number

the Prandtl number but not the Reynolds number

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A heat engine extracts heat (

) from a thermal reservoir at a temperature of 100 K and rejects heat (

) to a thermal reservoir at a temperature of 100 K, while producing work (

). Which one of the combinations of [

and

] given is allowed?

Your answerChoose one option.

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Two surfaces P and Q are to be joined together. In which of the given joining operation(s), there is no melting of the two surfaces P and Q for creating the joint?

Your answerSelect all correct options. You can choose more than one.

Arc welding

Brazing

Adhesive bonding

Spot welding

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A beam is undergoing pure bending as shown in the figure. The stress (

)-strain (

) curve for the material is also given. The yield stress of the material is

. Which of the option(s) given represent(s) the bending stress distribution at cross-section AA after plastic yielding?

Diagram for Mechanical Engineering question 24

Your answerSelect all correct options. You can choose more than one.

Diagram for Mechanical Engineering question 24 (figure 2)

Diagram for Mechanical Engineering question 24 (figure 3)

Diagram for Mechanical Engineering question 24 (figure 4)

Diagram for Mechanical Engineering question 24 (figure 5)

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In a metal casting process to manufacture parts, both patterns and moulds provide shape by dictating where the material should or should not go. Which of the option(s) given correctly describe(s) the mould and the pattern?

Your answerSelect all correct options. You can choose more than one.

Mould walls indicate boundaries within which the molten part material is allowed, while pattern walls indicate boundaries of regions where mould material is not allowed.

Moulds can be used to make patterns.

Pattern walls indicate boundaries within which the molten part material is allowed, while mould walls indicate boundaries of regions where mould material is not allowed.

Patterns can be used to make moulds.

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GATE ME topic:mechanical-engineering PYQs

Question 16

Question 17

Question 18

Question 19

Question 20

Question 21

Question 22

Question 23

Question 24

Question 25