GATE ME topic:mechanical-engineering PYQs & Answers — Page 11

Questions 101–110 of 1040. Imported answers require independent review unless marked reviewed.

In the closed interval [0, 3], the minimum value of the function

given below is

Your answerChoose one option.

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Considering the actual demand and the forecast for a product given in the table below, the mean forecast error and the mean absolute deviation, respectively, are

Period	1	2	3	4	5	6	7	8	9	10
Actual demand	425	415	420	430	427	418	422	416	426	421
Forecast	427	422	416	422	423	420	419	418	430	415

Your answerChoose one option.

0.8 and 42.0

0.8 and 4.2

8.0 and 42.0

8.0 and 4.2

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Match the mold elements in the casting process with the most suitable function.

Mold element	Function
P. Blind riser	I. Cast with internal cavity
Q. Chill	II. Molten metal reservoir
R. Skim bob	III. Nucleating agent
S. Core	IV. Assisting in faster heat removal from melt
T. Insulating sleeve	V. Removal of impurities
U. Inoculant	VI. Increasing the solidification time

Your answerChoose one option.

P-II, Q-IV, R-V, S-I, T-VI, U-III

P-II, Q-V, R-VI, S-I, T-III, U-IV

P-V, Q-I, R-VI, S-III, T-II, U-IV

P-II, Q-IV, R-I, S-V, T-VI, U-III

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Wire drawing operation is performed on a perfectly plastic material without any strain hardening. Assuming no friction and no redundant work, the maximum possible percentage reduction in area in a single pass is closest to

Your answerChoose one option.

51.2

63.2

75.0

93.2

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In relation to additive manufacturing, match the following.

Process	Layer creation technique	Material
P. Stereolithography	1. Injection of powder stream	I. Paper
Q. Fused deposition modeling	2. Extrusion of melt polymer	II. Epoxy
R. Laminated object manufacturing	3. Liquid layer curing	III. Titanium
S. Laser-engineered net shape	4. Sheet material deposition	IV. Acrylonitrile butadiene styrene (ABS)

Your answerChoose one option.

P-3-II, Q-1-IV, R-4-I, S-2-III

P-3-II, Q-2-IV, R-4-I, S-1-III

P-4-III, Q-2-IV, R-1-II, S-3-I

P-3-II, Q-2-IV, R-1-I, S-4-III

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A plate of 30 mm thickness is fed through a rolling mill with two powered rolls. Each roll has a diameter of 500 mm. The plate thickness is to be reduced to 27 mm in a single pass. Assume no change in width. The process feasibility and the maximum draft (in mm) can be represented, respectively, as

Use the coefficient of friction as 0.12

Your answerChoose one option.

feasible and 3.6

NOT feasible and 2.6

feasible and 3.0

NOT feasible and 6.0

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The system shown in the figure below consists of a cantilever beam (with flexural rigidity

and negligible mass), a spring (with spring constant

and negligible mass) and a block of mass

. Assuming a lumped parameter model for the system, the fundamental natural frequency (

) of the system is

Diagram for Mechanical Engineering question 42

Your answerChoose one option.

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The endurance limit of a specific grade of steel is same as its yield strength. The ultimate strength of this grade of steel is twice of its yield strength. A component made of this steel is loaded in tension and unloaded periodically. It is required that the component does NOT fail for at least

loading cycles, as per the Soderberg law. Considering a factor of safety of 2, the maximum applied tensile principal stress is

Your answerChoose one option.

one-fourth of the endurance limit

half of the endurance limit

the endurance limit

twice the endurance limit

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For a fully-developed pipe flow, which of the following options is/are correct?

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

For the same maximum velocity, the average velocity is higher in the turbulent regime than that of the laminar regime

Compressibility effects are important if Mach number is less than 0.3

For laminar flow, the friction factor is independent of surface roughness

For laminar flow, friction factor decreases with decrease in Reynolds number

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is the unit circle in the complex plane with its center at the origin, then the value of

in the equation given below is __________ (rounded off to 1 decimal place).

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GATE ME topic:mechanical-engineering PYQs

Question 36

Question 37

Question 38

Question 39

Question 40

Question 41

Question 42

Question 43

Question 44

Question 45