Perfect velocity ratio is obtained in ________

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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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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.

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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 __________

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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 ________

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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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To obtain 200 kg m of torque at the transmission output shaft, what gear ratio would be necessary? (Assume transmission efficiency 90% and input torque as 20 kg m)

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Miter gear is a type of ________

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Pitch length of standard chain number 40 is ________

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Pintle chains are made of ________

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Speed cones are associated to ________

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Quarter turn drive implies ________

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A V-belt operates at 25 m/s peripheral speed. The mass of the belt per unit length is 0.9 kg/m. The value of centrifugal tension in belt is ______

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In chain drives the component with a cast throttled wheel is known as _______

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The pitch of a chain is 200 mm. An 8 sprocket is operating at 250 rpm and driving a 25 teeth sprocket through the drain. The tension in the chain is 15 KN. Determine the maximum power.

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

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In an epicyclic gear train, one arm carries two wheels A and B having 25 teeth and 35 teeth respectively. If the arm rotates at 100 rpm in clockwise direction about centre of wheel A which is fixed, then speed of wheel on its own axis will be?

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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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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A single reduction gear of 120 KW with a pinion of 150 mm pitch circle diameter and speed 550 rpm is supported in bearings on either side. Calculate the total load due to power transmission.

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

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In case of V-belt the groove angle in small pullies is about _________

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The number of teeth in driving spur gear is 60. The circular pitch of the teeth is 15 mm. the tangential force transmitted is 140 kg. Calculate horsepower transmitted to the driven gear at 180 rpm of driving gear.

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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In a tractor differential, the pinion on the propeller shaft has 12 teeth and the crown gear has 50 teeth. The propeller shaft rotates at 1500 rpm and the right rear axle rotates at 250 rpm while taking a left turn. The rotation of the left axle in rpm will be __________

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

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Helical gear is used for transmitting the power between two ___________

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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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