Mechanical Engineering :: Theory of Machine
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A pair is said to be a kinematic pair, if the relative motion between them is completely or successfully constrained.
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The natural frequency of free transverse vibrations due to uniformly distributed load acting over a simply supported shaft is (where δS = Static deflection of simply supported shaft due to uniformly distributed load)
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A motor car moving at a certain speed takes a left turn in a curved path. If the engine rotates in the same direction as that of wheels, men due to centrifugal force
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A point B on a rigid link AB moves with respect to A with angular velocity ω rad/s. The angular acceleration of the link AB is (where
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= Radial and tangential components of the acceleration of B with respect to A) -
In order to give a complete secondary balance of a multi-cylinder in-line engine,
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A point B on a rigid link AB moves with respect to A with angular velocity ω rad/s. The total acceleration of B with respect to A will be equal to
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A spring controlled governor is said to be stable if the controlling force line when produced intersects the Y-axis
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When the radius of rotation of balls __________ as the equilibrium speed increases, the governor is said to be unstable.
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The engine of an aeroplane rotates in clockwise direction when seen from the tail end and the aeroplane takes a turn to the left. The effect of gyroscopic couple on the aeroplane will be
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A.
the reaction on me inner wheels increases and on the outer wheels decreases
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B.
the reaction on the outer wheels increases and on the inner wheels decreases
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C.
the reaction on the front wheels increases and on the rear wheels decreases
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D.
the reaction on the rear wheels increases and on the front wheels decreases
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