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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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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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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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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The crank and connecting rod of a steam engine are 0.3 m and 1.5 m in length. The crank rotates at 150 r.p.m. clockwise, determine velocity of the piston when the crank is at an angle 40 degrees from IDC.

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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When the piston is accelerated, the piston effort is given by which of the following the equation?

asked Sep 22, 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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When mass of the reciprocating parts is neglected then the inertia force is _____

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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.

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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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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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If the crank and the connecting rod are 600 mm and 2 m long respectively and the crank rotates at a constant speed of 250 r.p.m, determine maximum velocity of the piston in m/s is _____

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

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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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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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A Piston will remain in equilibrium if ________

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

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In the presence of frictional resistance, the expression for piston effort is _________

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

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In the given figure, the velocity of piston is maximum under which of the following conditions?

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

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In the figure given below, A and D are arbitrary masses placed Quantity L is known as _______

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

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Piston effort acts along the line of stroke.

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

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In a slider crank mechanism, the length of the crank and connecting rod are 150 mm and 600 mm respectively. The crank position is 60° from inner dead centre. The crank shaft speed is 400 r.p.m. (clockwise). Velocity of the slider is ________

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

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In a slider crank mechanism, the length of the crank and connecting rod are 180 mm and 540 mm respectively. The crank position is 45° from inner dead centre. The crank shaft speed is 450 r.p.m. (clockwise), calculate angular velocity of the connecting rod in rad/s.

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

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