Balancing of single rotating mass by balancing masses in same plane and in different planes cannot take place.

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In a system two masses are used to balance the unbalanced forces. Find the mass of the balancing mass which has to be situated at a distance of 20cm, if the disturbing mass is of 100 Kg having radius of rotation of 0.1m. One of the balancing mass is 30 Kg with RoR of 10cm.

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

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Balancing of reciprocating masses is the process of providing the second mass in order to counteract the effect of the centrifugal force of the first mass.

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In balancing of single-cylinder engine, the rotating unbalance is ____________

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A single mass defect needs to be balanced by a single balancing mass

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If all the masses are in one plane, then what is the maximum no. of masses which can be placed in the same plane?

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In case of partial balancing of locomotives, the maximum magnitude of the unbalanced force perpendicular to the line of stroke is called hammer blow and this has to be limited by proper choice of the balancing mass and its radial position.

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

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If all the masses are in one plane, then in which of the following condition is possible?

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If the rotation speed of the shaft increases then the balancing mass must also increase.

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Let the disturbing mass be 50 Kg, with radius of rotation = 0.1m, if one of the balancing mass is 30 Kg at a radius of rotation 0.1m then find the other balancing mass situated at a distance of 0.2m.

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

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What is the effect of a rotating mass of a shaft on a system?

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Which of the following statement is correct? (a)In any engine, 100% of the reciprocating masses can be balanced dynamically

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The secondary unbalanced force produced by the reciprocating parts of a certain cylinder of a given engine with crank radius r and connecting rod length l can be considered as equal to primary unbalanced force produced by the same weight having

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

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Which of the following statements is correct about the balancing of a mechanical system?

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Let the disturbing mass be 200 kg and the radius of rotation be 20 cm and the rotation speed be 50 rad/s, then calculate the centripetal force in kN.

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

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Let the disturbing mass be 100 kg and the radius of rotation be 10 cm and the rotation speed be 50 rad/s, then calculate the centrifugal force in kN.

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

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Let the disturbing mass be 100 kg and the radius of rotation be 20 cm and the rotation speed be 50 rad/s, then calculate the centrifugal force in kN.

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

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Let the centrifugal force in kN be 25 and the radius of rotation be 20 cm and the rotation speed be 50 rad/s, then calculate the mass defect in Kg.

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

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An Internal combustion engine has a connecting rod of mass 2 kg and the distance between the centre of crank and centre of gudgeon pin is 25 cm. The Center of Gravity lies at a point 10 cm from the gudgeon pin along the line of centres. The radius of gyration of this system about an axis through the Center of Gravity perpendicular to the plane of rotation is 11 cm. If two masses are used instead of the connecting rod, one at the gudgeon pin and other at the crank pin, if the angular acceleration of the rod is 23 000 rad/s^2, then find the correction couple in N-m.

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

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In which of the following condition torsional vibration will not take place, considering 3 rotors A, B and C. A is rotating in clockwise direction.

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The virtue or equivalent eccentric for the Meyer’s expansion valve is defined as an eccentric having such a length and angle of advance that will cause cut-off to take place at the same position, as is caused by the combined effect of main eccentric and expansion eccentric.

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

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An Internal combustion engine has a connecting rod of mass 2 kg and the distance between the centre of crank and centre of gudgeon pin is 25 cm. The Center of Gravity lies at a point 10 cm from the gudgeon pin along the line of centres. The radius of gyration of this system about an axis through the Center of Gravity perpendicular to the plane of rotation is 11 cm. If two masses are used instead of the connecting rod, one at the gudgeon pin and other at the crank pin. What will be the new radius of gyration?

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

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In a revolving rotor, the centrifugal force remains balanced as long as the centre of the mass of the rotor lies ___________

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Secondary forces in reciprocating mass on engine frame are

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Unbalanced mass leads to vibrations.

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The mass used to balance the mass defect is known as ______

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