When mass of the reciprocating parts is neglected then the inertia force is _____

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The crank-pin circle radius of a horizontal engine is 300 mm. The mass of the reciprocating parts is 250 kg. When the crank has travelled 30° from T.D.C., the difference between the driving and the back pressures is 0.45 N/mm^2. The connecting rod length between centres is 1.2 m and the cylinder bore is 0.5 m. If the engine runs at 250 r.p.m. and if the effect of piston rod diameter is neglected, calculate the net load on piston.

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

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For the given data of an Internal combustion engine : Mass of parts = 180 kg bore = 175 mm, length of stroke = 200 mm, engine speed = 500 r.p.m., length of connecting rod = 400 mm and crank angle = 60° from T.D.C, find the inertia force.

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

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Inertia forces on the reciprocating parts acts along the line of stroke.

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

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Piston diameter = 0.24 m, length of stroke = 0.6 m, length of connecting rod = 1.5 m, mass of reciprocating parts = 300 kg, mass of connecting rod = 250 kg; speed of rotation = 125 r.p.m; centre of gravity of connecting rod from crank pin = 0.5 m ; Kg of the connecting rod about an axis through the centre of gravity = 0.65 m Find the equivalent length L of a simple pendulum swung about an axis.

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

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In a horizontal engine, reciprocating parts are accelerated when the piston moves from _______

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In a horizontal engine, reciprocating parts are retarded when the piston moves from _________

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

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If the mass of the reciprocating parts is doubled, then the primary force is halved.

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

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Bennett’ construction is used to determine graphically the velocity and acceleration of reciprocating parts of an IC engine.

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

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Which of the following construction methods is not used to calculate the velocity and acceleration of reciprocating parts of the internal combustion engine?

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

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Ritterhaus’ construction is used to determine graphically the velocity and acceleration of reciprocating parts of an IC engine.

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

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In a horizontal engine, the weight of the reciprocating parts also add/subtract to the piston effort.

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

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If a force has a line of action at a distance h from the centre of gravity, then the value of h is given by _____

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When the acceleration of the piston is 0, then the velocity is _____

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

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Mass moment of inertia of two arbitrary masses placed will be same as the mass moment inertia of the rigid body.

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

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If OC is the crank and PC is the connecting rod of a reciprocating steam engine and rotates with uniform angular velocity in clockwise direction in the given figure below: then under which condition the piston will undergo retardation?

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

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Which of the following is incorrect regarding inertia force?

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

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Inertia force and the reversed effective force are the same.

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

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If c be the fraction of the reciprocating parts of mass m to be balanced per cyclinder of a steam locomotive with crank radius r, angular speed ω, distance between centre lines of two cylinders a, then the magnitude of the maximum swaying couple is given by

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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While calculating angular acceleration of the connecting rod, sin^2(θ) term is neglected.

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Klein’s constructions can be used to determine the acceleration of various parts at all locations.

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

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Why the inertia torque acts in the opposite direction to the accelerating couple?

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

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Inertia torque acts in the same direction as the accelerating couple?

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

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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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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. Find the mass located at gudgeon pin in Kg.

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

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