ISRO Scientist or Engineer Mechanical 2018

Instructions

For the following questions answer them individually

ISRO Scientist or Engineer Mechanical 2018 - Question 31


Torque, Tis applied at the free end of a stepped rod of circular cross-section as shown in figure. If the shear modulus of the material is G, the angular twist, $$\theta$$ at free end will be

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ISRO Scientist or Engineer Mechanical 2018 - Question 32


In mostbrittle materials, the ultimate strength in compression is larger than the ultimate strength in tension due to

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ISRO Scientist or Engineer Mechanical 2018 - Question 33


If the natural frequency of a spring mass system on earth is f, its natural frequency on moon where acceleration due to gravity is one-sixth of that on earth will be

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ISRO Scientist or Engineer Mechanical 2018 - Question 34


A solid shaft can resist a bending moment of 6 KN-m and a torque of 8 kN-m applied together. The maximum torque that the shaft can resist when applied alone is

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ISRO Scientist or Engineer Mechanical 2018 - Question 35


Two shafts of the same length and material are connectedin series, if the ratio of their diameters is 2, then the ratio of their angles of twist will be

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ISRO Scientist or Engineer Mechanical 2018 - Question 36


A concentrated load of F acts on a simply supported beam of span L at a distance of $$\frac{L}{3}$$ from left support, the bending momentat this location C is

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ISRO Scientist or Engineer Mechanical 2018 - Question 37


Euler's critical buckling load for a column fixed at both ends is

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ISRO Scientist or Engineer Mechanical 2018 - Question 38


A truck hauls a trailer at 60 km/hour when exerting a steady pull of 600 N. If the work is done for 40 minutes, the power required is

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ISRO Scientist or Engineer Mechanical 2018 - Question 39


A perfectly balanced rotor shaft supported between short bearings at both ends shows a deflection of 2mm at middle. Then the critical speed of the shaft in rom will be nearly,

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ISRO Scientist or Engineer Mechanical 2018 - Question 40


If an element is loaded as shownin figure below, the von-Mises stress will be close to

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