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ISRO ME 2019 Manufacturing Quiz 4

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Question 1

In rolling process, roll separation force can be reduced by ________.

Question 2

In an Electrochemical machining process an iron( atomic weight=56 gm and valency=2) is used having cross section of 0.5x0.5 cm². A current of 1000 A is passed through the electrolytic solution and the density of iron is given as 7.86gm/cm³. Find the feed rate of the electrode in cm/sec.

Question 3

The pitch diameter of a threaded portion is required to be measured. The thread angle is 60 degree and the pitch of the thread is the 4mm. What is the best wire radius for above process?

Question 4

A turning operation is carried out on lathe machine. The thrust force in turning will increase with increase in

Question 5

Match the following:
List - I
P. Quick return mechanism
Q. Apron mechanism
R. Indexing mechanism
S. Regulating wheel
List – II
1) Lathe
2) Milling machine
3) Shaper
4) Centerless grinding

Question 6

What is the optimum tool life for maximum production (in min), if the Taylor’s tool life exponent is 0.4 and tool changing time is 1.2 min __________.

Question 7

In order to clamp the tool and restrict all degree of freedom the 3,2,1 pin method is generally used for such application. How many pins are used for such constructions.

Question 8

Which of the following is the required condition for the formation of the Built-up edge ?

Question 9

Which of the following is a clearance fit

Question 10

For continuous welding with automated welding machine, the welding equipment can be operated at what current when the rated current and the rated duty cycle are 500A and 50% respectively

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ESE & GATE ME Manufacturing & Engg materials

Dec 14ESE & GATE ME