81. In a spring controlled governor, when the controlling force ________ as the radius of rotation increases, it is said to be a stable governor.
82. In order to double the period of a simple pendulum, the length of the string should be
83. In a disc clutch, if there are n1 number of discs on the driving shaft and n2 number of discs on the driven shaft, then the number of pairs of contact surfaces will be
84. In gears, interference takes place when
85. If $$\frac{\omega }{{\omega {\text{n}}}}$$ is very high for a body vibrating under steady state vibrations, the phase angle for all values of damping factors, will tend to approach
86. If $$\frac{\omega }{{\omega {\text{n}}}}$$ is very low for a body vibrating under steady state vibrations, the phase angle for all values of damping factors, will tend to approach
87. A typewriter mechanism has 7 numbers of binary joints, six links and none of higher pairs. The mechanism is
88. The velocity of sliding of meshing gear teeth is
(Where $${\omega _1}$$ and $${\omega _2}$$ are angular velocities of meshing gears and ‘y’ is distance between point of contact and the pitch point)
(Where $${\omega _1}$$ and $${\omega _2}$$ are angular velocities of meshing gears and ‘y’ is distance between point of contact and the pitch point)
89. A reed type tachometer use the principle of
90. Sensitiveness of the governor is defined as the ratio of the
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