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GATE preparation for Mechanical Engineering

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This thread is dedicated to preparation for Mechanical Engineering - ME section of GATE. You may share questions related to topics like Heat Transfer, Thermodynamics, Design, Engineering Mathematics, Machining and Machine Tool, Mechanics, Strength of Materials, Theory of Machines, Metal Casting etc.

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Abhinav

Shared from GATE - 2019 Mechanical Engineeri... on Jan 01, 2023 7:53 PM

The figure shows a pouring arrangement for casting of a metal block. Frictional losses are negligible. The acceleration due to gravity is 9.81 m/s². The time (in s, rounded off to two decimal places) to fill up the mold cavity (of size 40 cm × 30 cm × 15 cm) is

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Abhinav

Value of g should be substituted in cm/s^2. so it should be 981cm/s^2

Value of g should be substituted in cm/s^2. so it should be 981cm/s^2 Please type your answer before submitting.

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Roopkaur

Posted on Apr 29, 2023 12:30 PM

In solution value of g has taken as 981cm/s^2(9.81*100).

So, there is no issue.

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Sree Raj

Shared from Design of Machine Elements - 3 on Aug 29, 2019 11:52 AM

A steam boiler 1.2 metres in diameter generates steam at a gauge pressure of 0.7 N/mm². Assuming the efficiency of riveted joint as 75%, find the thickness (in mm up to one decimal place) of the shell. (Given: Factor of safety = 5, Ultimate tensile stress = 385 N/mm²)

6.7

7.3

9.2

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Sree Raj

(Pd)/4t is the hoop stress to be considered since it is to be considered as a shell / sphere. so ans will be half of this??

(Pd)/4t is the hoop stress to be considered since it is to be considered as a shell / sphere. so ans will be half of this?? Please type your answer before submitting.

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Edugate405

Shared from GATE Mock Test - 8 (Mechanical E... on Jan 31, 2019 5:36 PM

Blocks A and B of masses 40 kg and 60 kg, respectively are placed on a smooth surface as shown in the figure and the spring connected between them is stretched a distance 2 m . If they are released from rest, the speeds of both blocks the instant the spring becomes unstreched is (Take k = 150 N/m)

V_A = 4 m/sec, V_B = 3 m/sec

V_A = 2 m/sec, V_B = − 6 m/sec

V_A = 2 m/sec, V_B = − 3 m/sec

V_A = − 3 m/sec, V_B = 2 m/sec

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Edugate405

Correct answer is D)

Correct answer is D) Please type your answer before submitting.

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Gopi

Shared from GATE Mock Test - 3 (Mechanical E... on Jan 29, 2019 1:46 PM

The rank of a 3 x 3 matrix C = AB found by multiplying a non-zero column matrix A of size 3 x 1 and a non-zero row matrix B of size 1 x 3 is

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Gopi

Answer is 1 not zero

Answer is 1 not zero Please type your answer before submitting.

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Edugate434

Shared from GATE Mock Test - 10 (ME) on Jan 26, 2019 10:30 PM

A rectangular plate blocks the end of a freshwater channel as shown in the figure below.

The plate is hinged about a horizontal axis along its upper edge through a point A and is restrained from opening by a fixed ridge at point B. If the width of the plate is b, the force exerted on the plate by the ridge is

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Edugate434

Can you give explanation

Can you give explanation Please type your answer before submitting.

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GATE preparation for Mechanical Engineering

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