71. Aircraft body is usually fabricated by
72. The property of a material which enables it to resist fracture due to high impact loads is known as
73. A self locking screw has
74. A hollow saddle key is
75. When spring index increases, the value of Wahl's stress factor
76. The stress in the bar when the load is applied suddenly is __________ as compared to the stress induced due to gradually applied loads.
77. The shear stress in a beam varies from zero at the outer fibers to a maximum at the ________.
78. Three different weights fall from a certain height under vacuum. They will take
79. Which of the following is a permanent fastening?
80. The helix angle for double helical gears may be made up to
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