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SSC-JE ME || Machine Design 1
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Question 1
A machine component subjected to fluctuating stress that varies from 30 to 50 MPa the amplitude ratio is __________.
Question 2
In which of the following case stress concentration factor is ignored?
Question 3
Factor of safety is the ratio of:
Question 4
A bar is subjected to fluctuating tensile load from 20 kN to 100 kN. The material has yield strength of 240 MPa and endurance limit in reversed bending is 160 MPa. According to the Soderberg principle, the area of cross-section (in mm2)of the bar for a factor of safety of 2 is
Question 5
The phenomenon of decreased resistance of the materials to fluctuating stresses is the main characteristic of _____ failure.
Question 6
Notch sensitivity (q) is given by the equation _______.
where Kf = fatigue stress concentration factor and Kt = theoretical stress concentration factor.
Question 7
The theoretical stress concentration factor(Kt ) due to small circular hole in a flat plate which is subjected to a tensile force is
Question 8
In terms of theoretical stress concentration factor (Kt) and fatigue stress concentration factor (Kf), the notch sensitivity ‘q’ is expressed as
Question 9
A machine component is subjected to variable loading such that amplitude stress, mean stress. endurance Limit stress, ultimate strength and yield strength are 90MPa, 150MPa, 270 MPa, 600MPa, 450 MPa respectively. Find the factor of safety Using Soderberg line.
Question 10
A body is subjected to mean stress 50 MPa and stress amplitudes 150 MPa. Find the stress Ratio?
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