ISRO Scientist or Engineer Mechanical 2011

Instructions

For the following questions answer them individually

Question 51

For a column of length L is fixed at both ends, corresponding Eulerโ€™s critical load is

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Question 52

Which one of the following figures is the correct sketch of Mohrโ€™s circle of the given state of stress

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Question 53

With a punch for which the maximum crushing stress is 4 times the maximum shearing stress of the plate, the biggest hole that can be punchedi in the plate would be of diameter equal to

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Question 54

A simply supported beam with width โ€˜bโ€™ and. depth โ€˜dโ€™ carries a central load W and undergoes deflection $$\delta$$ at the centre. If the width and depth are interchanged, the deflection at the centre of the beam would attain the value:

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Question 55

The given figure shows a cantilever of span โ€˜Lโ€™ subjected to a concentrated load โ€˜Pโ€™ and a moment โ€˜Mโ€™ at the free end. Deflection at the free end is given by

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Question 56

In arc welding, penetration is minimum for

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Question 57

Match list - I (welding effects) with list II (causes) and select the correct answer using the codes given below the lists:

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Question 58

Two beams of equal cross sectional area are subjected to equal bending moment. If one beam has square section and the other has circular section then,

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Question 59

The number of degree of freedom of a five link plane mechanism with five revolute pairs as shown in the figure is

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Question 60

To ensure self locking in a screw jack, it is essential that helix angle is

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