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GATE 2023 || Manufacturing & Engineering materials || Quiz 62

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Question 1

The main purpose of chaplets is

Question 2

Two castings of the same metal have the same surface area. One castings is in the form of a sphere and the other is a cube. What is the ratio of the solidification time for the sphere to that of the cube?

Question 3

Defects occur in castings due various factors, out of which defects caused due to mould and core making techniques are;
1) Fins
2) Shifts
3) Swell
4) Blowholes

Question 4

A steel casting is made with the help of aluminum pattern and aluminum pattern is made up of wooden pattern. The dimensions of steel block required are 100 × 150 × 80 mm³ and pattern allowance of steel is 20mm in every meter of length and that of aluminum is 13mm in every meter of length. Then the height of wooden pattern required is _______mm. (correct up to 2 decimal places)

Question 5

A casting of size 100 x 50 x 50 cm was filled by top gates with manometric height in pouring basin to be 25 cm. find the time (in sec) to fill the casting. The area of gate is 5 square cm.

Question 6

A spherical drop of molten metal of radius 2 mm was found to solidify in 10 s. A similar drop of radius 8 mm would solidify in

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ESE & GATE ME Manufacturing & Engg materials

Jul 12ESE & GATE ME