41. In Vickers hardness testing, the pyramid indentor apex is
42. Wahl's stress factor __________ very rapidly as the spring index decreases.
43. In the levers of first type, the mechanical advantage is ________ one.
44. For standard coarse threads of nut, the threads will be as strong in failure by shear as the bolt in tension, if the height of nut (h) is approximately
45. Stress concentration is caused due to
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