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ISRO ME 2019 Manufacturing Quiz 5

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Question 1

A metal disc of 40 mm diameter is to be punched from a sheet of 2 mm thickness. The punch and the die clearance is 3% of the required punch diameter is _________.

Question 2

Which of the following is false about comparator ?

Question 3

Which of the following welding method is not a solid state welding process __________?

Question 4

Which of the following represents the Gating ratio

Question 5

For an abrasive water jet machining process (AJM), a mixture of abrasives and water is used for a machining process and the material removal rate mainly depends upon the rate of material flow Q and the size of the abrasives d.For a particular AJM process find the change in material removal rate if the material flow is increase by 8 times and size of abrasive decrease by 2 times.

Question 6

Diameter of a hole after plating needs to

mm. If the plating thickness varies between 10 - 15 microns, diameter of the hole before plating should be

Question 7

In an arc welding process of steel, the power required to weld is 4000 watts, travel speed of the heat source is 5 mm/s and cross sectional area of joint produced is 20 mm². If the heat required to melt the material is 10 J/mm³ and heat transfer efficiency is 0.80, then the melting efficiency will be

Question 8

Which of the following casting process is not a temporary moulding process

Question 9

In an orthogonal cutting test on mild steel, the following data were obtained.
cutting speed : 40 m/min
depth of cut : 0.3 mm
tool rake angle : 5°
chip thickness : 1.5 mm
cutting force : 900 N
Thrust force : 450 N
Using merchant’s analysis’s the friction angle during machining will be

Question 10

The time taken to drill a hole through a 25 mm thick plate with the drill rotating at 300 rpm and moving at a feed rate of 0.25 mm/revolution is

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ESE & GATE ME Manufacturing & Engg materials

Feb 22ESE & GATE ME