GATE ME 2018 Paper 2 — page 15

Questions 43–45 of 65. Imported answers require review unless explicitly marked reviewed.

A bimetallic cylindrical bar of cross sectional area 1 m

is made by bonding Steel (Young’s modulus = 210 GPa) and Aluminium (Young’s modulus = 70 GPa) as shown in the figure. To maintain tensile axial strain of magnitude

in Steel bar and compressive axial strain of magnitude

in Aluminium bar, the magnitude of the required force P (in kN) along the indicated direction is

Diagram for Mechanical Engineering question 33

Your answerChoose one option.

140

210

280

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Air flows at the rate of 1.5 m

/s through a horizontal pipe with a gradually reducing cross-section as shown in the figure. The two cross-sections of the pipe have diameters of 400 mm and 200 mm. Take the air density as 1.2 kg/m

and assume inviscid incompressible flow. The change in pressure

(in kPa) between sections 1 and 2 is

Diagram for Mechanical Engineering question 34

Your answerChoose one option.

−1.28

2.56

−2.13

1.28

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The problem of maximizing

subject to constraints

and

has

Your answerChoose one option.

no solution

one solution

two solutions

2018 · Paper 2

Question 33

Question 34

Question 35