How many hectares per day of 10 hours can be cut by a combine with 4 metre cutter bar, when it is running at 4 k/hr?

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How many hectares of grass per day of 15 hours can be cut by a mower being operated at the speed of 4.5 km/h and with 4 m cutter bar.

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

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Calculate the total time required to harvest 2.5 hectares of grass by means of a 2 metre mower being operated at 4 km/hr. (Field efficiency=80%)

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

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What power is required to pull 1.2 mete mower working at a speed of 4.8 km/hr, if there is a load of 50 kg per metre length of mower and mechanical efficiency is 80%?

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

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How many acres can be covered by a harrow of 1.5 m width in a day of 8 hours with bullock power. If each spike of the harrow is giving 1 kg resistance when there are 50 spikes. What power would be necessary for the bullocks to pull the harrow?

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

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A cylinder type chaff cutter head in a direct throw field chopper has 5 knives and diameter as 450 mm. The throat size is 40*12 cm for 15 mm theoretical length of cut with corn silage. What will be the rated capacity in megagrams per hours at 100% field efficiency?

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

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A mower has drive wheel of 60 cm diameter. The crank of the mower makes 600 rev/min when it is driven by a tractor, moving at a speed of 2.3 km/hr. If the speed ratio between the crank wheel and land wheel is changed to 27:1, calculate the increase in speed of mower to maintain same speed of crank.

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

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Calculate the total time required to harvest 4 hectares of grass by means of a 2mm mower being operated at the speed of 4 km/h. Assume field efficiency of mower as 75%?

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

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A power operated chaff cutter is used for cutting Napier grass of density 640 kg/m^3 at 800 rpm speed. If blades make a clearance angle of 18° between the knife support assembly and the plan of rotation and distance of inner edge of throat from flywheel centre is 10 cm. What will be the theoretical length of cut without feed interference using 4 knives?

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

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Calculate the cost of seeding one hectare of land with bullock-drawn seed drill of 5*22 cm size. The speed of bullocks is 3km/hr. Hire charges of bullocks ₨ 100/- per pair, hire charges of seed drill is ₨ 50/- per day and wage of operator ₨ 100/- per day of 8 hours.

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

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In cutter bar of mower, the knife head is attached to the ___________

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

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In cutter bar of mower, the knife sections are revitted to the ___________

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

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A disc type mower is operated by PTO with 6 discs with a shaft of 0.4 m/disc. The specific energy required for cutting is 2.1 KJ/m^2 and specific power losses due to air come stubble and gear train friction is 2 kw/m of cutting width. If the mower with tractor requires a propelling force of 2 KN the total power requirement for carrying out moving in Kw at forward speed of 3 km/h is ____

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

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A mower has driven wheel of 60 cm diameter. The crank of mower makes 550 rpm, when it is driven by a tractor at a speed of 2 km/h. If speed ratio between the crank wheel and land wheel is changed to 27:1, calculate the increase in speed of mower to maintain the same speed of crank.

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

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A 2m mower is operating at 3.5 km/h with an overall efficiency of 75%. Calculate the area covered by it in ha/h.

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

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The flywheel of a power operated chaff cutter receives the power through belt and pulley arrangement from an electric motor, running at 1600 rpm speed. The motor pulley has a diameter of 10 cm, while that of the pulley mounted on a flywheel shaft is 50 cm. The speed ratio between the flywheel and worm gear of diameter 15 cm is 7:1. What would be the rpm of flywheel and worm gear?

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

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A field chaff cutter with cutter head has 4 knives and diameter of 650 mm. The given peripheral speed is 30 m/s and throat size is 45*15 cm. For 20 mm length of cut with corn silage what will be the linear speed and rated feeding capacity?

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

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How many revolutions will each spindle of cotton picker make in the picking zone for a chain belt arrangement in which the speed of spindle is 1400 rpm and remains in the picking zone during 100 cm of forward travel.

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

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A four bottom 40 cm MB plough has a working depth of 15 cm and draft of 1600 kg. It is working at a speed of 15 cm and draft of 1600 kg. it is working at a speed of 4.5 km/hr with field efficiency of 70%. What will be the drawbar power?

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

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An air blast of sprayers is to be operated at 3 km/hour and desired application rate is 18 l/tree. The tree spacing is 9*9 m and nozzle delivers 5 l/min at operating pressure of 4*10^5 N/m^2. How many nozzles would be needed?

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

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An air blast of sprayer is to be operated at 3 km/h and application rate is 18 l/tree. The spacing is 9m*9m and each nozzle delivers 5 lit/min and operating process of 4*10^5 N/m^2. If one half row is sprayed from each side of the machine. How many sprayers will be needed?

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

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A 4*100 cm seed drill is to be operated at a forward speed of 3.6 km/h. The diameter of the ground wheel is 50 cm. a cup type metering mechanism with 10 cells on its periphery is used for dropping one seed in a hill. Power transmitted from the ground wheel shaft to the metering shaft with the help of chain and sprocket arrangement. If the desired plant population is 6000 per hectare and average emergence is 75% speed ratio between ground wheel shaft and metering shaft will be ____________

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

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A six-cylinder 4-stroke engine has bore diameter 11 cm and stroke length 12.2 cm running at 2800 rev/min consumes 455m^2 of air per hour. What would be the volumetric efficiency of the engine?

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

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Calculate the cost of sowing 1 ha of land with a bullock drawn seed drill of size 5*20 cm. the speed of bullock is 3kmph. Hire charge for bullock is Rs 100 per pair/day, hire charge for seed drill is Rs 50 per day and wages for operator is Rs 100 per day of 8 hours.

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

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What will be the interest per hour when the cost of 35hp tractor is ₨ 3,00,000/-, life of tractor is 10 years, rate of interest 10% and working hours per year is 1000 hours?

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

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What is the area covered per day of 8 hours by a tractor down four bottom 35 cm plough if the speed of the ploughing is 6km per hour, the time lost in turning is 6%?

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

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