21. The material used for brake lining should have __________ coefficient of friction.
22. Form coefficient of spring is
23. The piston pin bearings in heavy duty diesel engines are
24. A locking device extensively used in automobile industry is a
25. The design calculations for members subject to fluctuating loads with the same factor of safety, yield the most conservative estimates when using
26. Creep in belt is due to
27. The spring mostly used in gramophones is
28. In designing a connecting rod, it is considered like __________ for buckling about X-axis.
29. In designing a connecting rod, it is considered like __________ for buckling about Y-axis.
30. Tensile strength of a mild steel specimen can be roughly predicted from following hardness test
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