GATE ME topic:mechanics PYQs & Answers — Page 95

Questions 941–950 of 1040. Imported answers require independent review unless marked reviewed.

Topic practice 1040 questionsPage 95 of 104

Consider a beam with circular cross-section of diameter

. The ratio of the second moment of area about the neutral axis to the section modulus of the area is

Your answerChoose one option.

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For the stability of a floating body the

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centre of buoyancy must coincide with the centre of gravity

centre of buoyancy must be above the centre of gravity

centre of gravity must be above the centre of buoyancy

metacentre must be above the centre of gravity

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The following figure shows the velocity-time plot for a particle traveling along a straight line. The distance covered by the particle from

is ______ m.

Diagram for Mechanical Engineering question 17

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Consider a laminar flow at zero incidence over a flat plate. The shear stress at the wall is denoted by

. The axial positions

and

on the plate are measured from the leading edge in the direction of flow. If

, then

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The damping ratio for a viscously damped spring mass system, governed by the relationship

, is given by

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The heat loss from a fin is 6 W. The effectiveness and efficiency of the fin are 3 and 0.75, respectively. The heat loss (in W) from the fin, keeping the entire fin surface at base temperature, is ____________

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Consider the schematic of a riveted lap joint subjected to tensile load

, as shown below. Let

be the diameter of the rivets, and

be the maximum permissible tensile stress in the plates. What should be the minimum value for the thickness of the plates to guard against tensile failure of the plates? Assume the plates to be identical.

Diagram for Mechanical Engineering question 19

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The emissive power of a blackbody is

. If its absolute temperature is doubled, the emissive power becomes

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Cylindrical pins of diameter

are being produced on a machine. Statistical quality control tests show a mean of

and standard deviation of

. The process capability index

Your answerChoose one option.

0.833

1.667

3.333

3.750

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Which one of the following statements is TRUE for the ultrasonic machining (USM) process?

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In USM, the tool vibrates at subsonic frequency.

USM does not employ magnetostrictive transducer.

USM is an excellent process for machining ductile materials.

USM often uses a slurry comprising of abrasive-particles and water.

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GATE ME topic:mechanics PYQs

Question 16

Question 16

Question 17

Question 17

Question 18

Question 18

Question 19

Question 19

Question 20

Question 20