Isochronism in a governor is desirable when

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A Porter governor has equal arms each of length 250 mm and pivoted on the axis of rotation. Each ball has a mass of 5 kg and the central load has a mass on the sleeve of 25 kg. The radius of rotation of the ball is 150 mm when the governor begins to lift and 200 mm when the governor is at maximum speed. Considering friction at the sleeve of 10N, find the power of the governor in N-m

asked Sep 23, 2022 in Machine Dynamics by Grayson (34.3k points)

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A Pickering governor is driving a gramophone. Each disc attached to the centre of a leaf spring has a mass of 20 g. The width of each spring is 5 mm and thickness of 0.125 mm. The effective length of each spring is 40 mm. The distance from the spindle axis to the centre of gravity of the mass when the governor is at rest, is 10 mm, find the speed of the turntable in rpm if ratio of the governor speed to the turntable speed is 10.5.

asked Sep 23, 2022 in Machine Dynamics by Grayson (34.3k points)

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A Pickering governor is driving a gramophone. Each disc attached to the centre of a leaf spring has a mass of 20 g. The width of each spring is 5 mm and thickness of 0.125 mm. The effective length of each spring is 40 mm. The distance from the spindle axis to the centre of gravity of the mass when the governor is at rest, is 10 mm. Find the speed of the governor in rpm when the sleeve has risen to a height of 0.8 mm. (E = 210kN/mm^2)

asked Sep 23, 2022 in Machine Dynamics by Grayson (34.3k points)

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In a spring controlled governor, when the controlling force _____________ as the radius of rotation increases, it is said to be a stable governor.

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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A Porter governor has equal arms each of length 250 mm and pivoted on the axis of rotation. Each ball has a mass of 5 kg and the central load has a mass on the sleeve of 25 kg. The radius of rotation of the ball is 150 mm when the governor begins to lift and 200 mm when the governor is at maximum speed. Considering friction at the sleeve of 10N, find the range of speed in rpm.

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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A Porter governor has equal arms each of length 250 mm and pivoted on the axis of rotation. Each ball has a mass of 5 kg and the central load has a mass on the sleeve of 25 kg. The radius of rotation of the ball is 150 mm when the governor begins to lift and 200 mm when the governor is at maximum speed. Neglecting friction at the sleeve, find the power of the governor in N-m.

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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For isochronism, range of speed should be equal to mean speed.

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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When the relation between the controlling force (Fc) and radius of rotation (r) for a spring controlled governor is Fc = ar + b, then the governor will be

asked Sep 23, 2022 in Machine Dynamics by Grayson (34.3k points)

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A centrifugal Watt governor is fitted with two balls, each of mass 2.5 kg. Find the height of the governor, when it is running at 75 r.p.m.

asked Sep 23, 2022 in Machine Dynamics by Grayson (34.3k points)

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A governor is said to be isochronous when the equilibrium speed is

asked Sep 23, 2022 in Machine Dynamics by Grayson (34.3k points)

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If the controlling force line for a spring controlled governor when produced intersects the Y-axis at the origin, then the governor is said to be unstable.

asked Sep 23, 2022 in Machine Dynamics by Grayson (34.3k points)

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If the controlling force line for a spring controlled governor when produced intersects the Y-axis at the origin, then the governor is said to be

asked Sep 23, 2022 in Machine Dynamics by Grayson (34.3k points)

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A centrifugal Watt governor is fitted with two balls, each of mass 2.5 kg. Find the sped of the governor, when the balls rise by 20 mm.

asked Sep 23, 2022 in Machine Dynamics by Grayson (34.3k points)

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A centrifugal Watt governor is fitted with two balls, each of mass 2.5 kg. Find the sped of the governor, when the balls fall by 20 mm.

asked Sep 23, 2022 in Machine Dynamics by Grayson (34.3k points)

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A Hartnell governor has its controlling force (Fc) given by Fc = ar + b, where r is the radius of rotation and a and b are constants. The governor becomes isochronous when

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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When a governor is fitted into an engine, then sensitiveness is defined as the ratio of ________ of maximum and minimum speed to the mean speed.

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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A Porter governor has equal arms each of length 250 mm and pivoted on the axis of rotation. Each ball has a mass of 5 kg and the central load has a mass on the sleeve of 25 kg. The radius of rotation of the ball is 150 mm when the governor begins to lift and 200 mm when the governor is at maximum speed. Neglecting friction at the sleeve, find the governor effort.

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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Consider two governors A and B running at the same speed. When this speed increases or decreases by a certain amount, the lift of the sleeve of governor A is greater than the lift of the sleeve of governor B. Which of the following statement is true for the above situation?

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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A spring controlled governor is said to be isochronous when the controlling force

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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A Porter governor has equal arms each of length 250 mm and pivoted on the axis of rotation. Each ball has a mass of 5 kg and the central load has a mass on the sleeve of 25 kg. The radius of rotation of the ball is 150 mm when the governor begins to lift and 200 mm when the governor is at maximum speed. Neglecting friction at the sleeve, find the sleeve lift.

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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A Porter governor has equal arms each of length 250 mm and pivoted on the axis of rotation. Each ball has a mass of 5 kg and the central load has a mass on the sleeve of 25 kg. The radius of rotation of the ball is 150 mm when the governor begins to lift and 200 mm when the governor is at maximum speed. Considering friction at the sleeve of 10N, find the governor effort.

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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A spring controlled governor is said to be unstable when the controlling force

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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When the relation between the controlling force (FC) and radius of rotation (r) for a spring controlled governor is FC = a.r + b, then the governor will be

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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A governor is said to be isochronous when range of speed is zero for all radii of rotation of the balls within the working range, neglecting friction.

asked Sep 22, 2022 in Machine Dynamics by Grayson (34.3k points)

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The ratio of the height of a Porter governor (when the length of arms and links are equal) to the height of a Watt’s governor is

asked Sep 21, 2022 in Machine Dynamics by Grayson (34.3k points)

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