ISRO Scientist or Engineer Mechanical 2011


For the following questions answer them individually

Question 61

A cutting tool having tool signature as 10, 9, 6, 6, 8, 8, 2 will have side rake angle

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Question 62

In radiographic test, type of defect not detectable by X-Rayis

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Question 63

In CAM, “Part programming” refers to

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Question 64

A 50mm diameter steel rod was turned at 284 rpm and tool failure occurred in 10 minutes. The speed was changed to 232 rpm and the tool failed in 60 minutes. Assuming straight line relationship between cutting Speed and tool life, the value of Taylorian Exponent is

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Question 65

Which of the following screw thread is adapted for power transmission in one direction

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Question 66

CLA value and RMS values are used for measurement of

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Question 67

A sine bar is specified by

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Question 68

A shaft and hole pair is designated as 50H7d8. This assembly constitutes

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Question 69

A milling machine has the following two index plates supplied along with the indexing head:
Plate 1: 15, 16,17,18, 19, 20, hole circles
Plate 2: 21,23,27,29,31,33, hole circles
It is proposed to mill a spur gear of 28 teeth using simple indexing method. Which one of the following combinations of index plate and number of revolutions is correct?

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Question 70

The initial blank diameter required to form a cylindrical cup of outside diameter ’d’ and total height ‘h’ having a corner radius ‘r’ is obtained using the formula

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