Which of the following rollers are used for external drive?

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The speed reduction in 1^st low gear of tractor box and differential with final drive are 5:1 and 45:1 for a tractor developing 30 KW at engine at an rpm of 2500 with overall efficiency of 85%. The torque is KN-m available at wheel axle?

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

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The chain drive is used to reduce the speed from 180 rpm to 90 rpm, the driving sprocket has 20 teeth and pitch circle diameter of 500 mm. The centre to centre distance between the sprockets of chain drive is 550 mm. Determine total number of links.

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

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In a simple planetary gear drive, the sun gear is used to give drive a plant carrier mounted with 3 planetary gears, while ring gear is held stationary. If sun gear and all other planetary gears have 20 teeth each and ring gear has 60 teeth, the gear ratio will be __________

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

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The centre to centre distance between two sprockets of chain drives is 600 mm. The chain drive is used to reduce the speed from 160 rpm to 90 rpm. The driving sprocket has 18 teeth and pitch circle diameter of 480 mm. Determine the pitch of the chain and teeth on driven sprocket.

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

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Chain and sprocket drive is used, where _____________

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Chain and sprocket drive is preferred, when two parallel shafts are placed at a distance of _______

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In an epicyclic gear train, the sun gear on the input shaft is 20 teeth external gear. The planet gear is a 40 teeth external gear and the ring gear is a 100 teeth internal gear. The ring gear is fixed and the sun gear is rotating at 60 rpm counter clockwise. The arm attached to output shaft will rotate at ________

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

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In a single V-belt drive having 30° groove angle, the cross-section area of belt is 350 mm^2 and mass density of belt material is 1400 kg/m^3. The maximum tension transmitted through the belt in kN is ________

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

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A tractor has 1.6 m rear wheel diameter. If the e gear ratio of final drive and differential gear is 5:1 and 4:1 respectively calculate forward speed of tractor in kilometre per hour.

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

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Quarter turn drive implies ________

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

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In a belt drive, the mass of the belt is 10 kg/m and its speed is 6 m/s. The drive transmits 20 KW of power. Determine the initial tension in the belt and the strength of the belt. The co-efficient of friction is 0.25 and wrap angle is 220°.

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

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Determine the length of the chain having 200 mm pitch and is used for speed reduction from 340 rpm to 120 rpm. The numbers of teeth on driving and driven sprockets are 20 and 40 respectively. The centre to centre distance between 2 sprockets is 540 mm and diameter of driven sprocket is 450 mm.

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

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In chain drives, for higher speed and loads, suitable chains to be used are ______

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

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Worm gear is used, when two shafts are at _________

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

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Helical gear is used for transmitting the power between two ___________

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

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A chain is used for speed reduction from 240 rpm to 110 rpm. The number of teeth on driving sprocket is 22. The centre to centre distance between 2 sprockets is 540 mm and pitch circle diameter of driven sprockets is 480 mm. determine number of teeth on driven sprockets.

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

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While testing a wheat thresher at recommended throughout 80 Nm torque is recorded at 850 rpm at the main shaft of the threshing cylinder, which is operated by a 200-mm diameter pulley. The overload factor and unit mass of V-belt are 1.2 and 0.9 kg/m respectively. At condition of maximum power transfer the maximum tension in V-belt in N is __________

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

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A V-belt is used to transmit 5 KW at 17 m/s, the included angle of the belt is 38°, the density of the belt is 1.25 g/cm^3, contact angle on smaller pulley is 150°, tension on the belt is adjusted by providing idlers. Find tension at tight and slack side of belt.

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

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A tractor has 8 forward speeds. The speed ratio varies in exact geometrical progressions. If the speed ratio in highest and lowest gear are 14.9:1 and 108:1, the geometrical constant will be __________

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

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Pintle chains are made of ________

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

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If a driven pulley is made at 350 rpm by a driving pulley of 0.3 m diameter running at 1400 rpm. Determine length of open belt when the pulleys are 4 meters apart.

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

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Speed cones are associated to ________

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

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Two pulleys are connected by a belt. The sum of the diameters of two pulleys is 90 cm and while the one makes 50 rpm, the other makes 20 rpm. Find the diameter of other pulley.

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V-belts are named because of __________

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Determine the length of cross belt of connecting two pulleys 5 cm apart. The diameter of driving and driven pulleys are 1.25 m and 0.75 m respectively.

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

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