In Meyer’s expansion valve, the main valve is driven by an eccentric having and angle of advance from

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In Meyer’s expansion valve, the expansion valve is driven by an eccentric having an angle of advance from

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

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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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In a steam engine, one method of obtaining the earlier cut-off with a simple slide valve may be obtained by increasing the angle of advance of the eccentric but reducing the throw of the eccentric and keeping the steam lap and exhaust lap constant. The method will cause withdrawing or throttling of steam.

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In a steam engine, one method of obtaining the earlier cut-off with a simple slide valve is by increasing the steam lap and the angle of the eccentric but keeping constant the travel and lead of the valve. This method will

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A flywheel is used to control the mean speed of an engine caused by the variations in load.

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When the load on the engine increases, it becomes necessary to increase the supply of working fluid and when the load decreases, less working fluid is required. The supply of the working fluid to the engine is controlled by a

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The function of a reversing gear in a steam engine is

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The throw of the eccentric is equal of the valve travel.

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The distance moved by the valve from one end to the other end is called valve travel.

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In a steam engine, the distance by which the inner edge of the D-slide valve overlaps the steam port is called lead.

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In a steam engine, the distance by which the outer edge of the D-slide valve overlaps the steam port is called

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The piston slide valve is an inside admission valve.

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The displacement of the D-slide valve is ______________ the steam lap by a distance known as lead of the valve.

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

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The distance by which the _____________ of the D-slide valve overlaps the steam port is called exhaust lap.

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Which of the following statement is correct? (a)The power absorbed in operating the piston valve is less than D-slide valve.

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The D-slide valve is also known as

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Two shafts having an included angle of 150° are connected by a Hooke’s joint. The driving shaft runs at a uniform speed of 1500 r.p.m. The driven shaft carries a flywheel of mass 12 kg and 100 mm radius of gyration. Using the above data, calculate the maximum angular acceleration of the driven shaft in rad/s^2.

asked Sep 25, 2022 in Machine Kinematics by Leo (38.0k points)

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Two shafts having an included angle of 150° are connected by a Hooke’s joint. The driving shaft runs at a uniform speed of 1500 r.p.m. The driven shaft carries a flywheel of mass 12 kg and 100 mm radius of gyration. Using the above data, calculate the maximum torque required in N-m.

asked Sep 25, 2022 in Machine Kinematics by Leo (38.0k 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.

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A ship propelled by a turbine rotor which has a mass of 5 tonnes and a speed of 2100 r.p.m. The rotor has a radius of gyration of 0.5 m and rotates in a clockwise direction when viewed from the stern. Find the gyroscopic effect when the ship sails at a speed of 30 km/h and steers to the left in a curve having 60 m radius.

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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.

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A hydraulic circuit uses 25 litres of fluid per min. The fluid is supplied by a pump having a fixed displacement of 12.5 cm^3 per revolution driven at 3000 rpm. The pump has a volumetric efficiency of 0.85 and torque efficiency of 0.88. If the system pressure is set at 18 MPa by the relief valve. What will be the power required to drive the pump?

asked Jan 29, 2022 in Farm Machinery by Olivia (38.9k points)

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A flywheel is fitted to the crankshaft of an engine having W as the amount of indicated work per revolution and permissible limits of coefficient of fluctuation of energy and speed as CE and CS respectively. The kinetic energy of the flywheel is given by

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

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If θ is the angle turned by the cam from the beginning of the roller displacement, then minimum acceleration pf the follower occurs at what value of θ in degrees?

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If θ is the angle turned by the cam from the beginning of the roller displacement, how the velocity changes with the change in theta?

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