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.

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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 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.

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

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

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A hydraulic sprayer fitted with hollow nozzle is required to be calibrated for application rate 150 L/ha. The sprayer speed is 6.5 km/h. Nozzle spacing is 50 cm. The available 0.787 mm orifice diameter. Nozzle is rated at 0.473 L/min. What is the nozzle flow rate?

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

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A field sprayer having a horizontal boom with 20 nozzles spaced 40 cm apart is to be designed for maximum application rate of 650 l/ha at nozzle pressure of kPa and forward speed of km/h. What will be the pump capacity in l/min?

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

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Calculate the time required for sowing 1 hectares of land by 5 furrows seed drill going 12 cm deep. The speed of seed drill is 3.5 km/h and pressure exerted by the soil on the seed drill is 0.42 kg/cm^2. The space between furrow openers is 10 cm and turning loss is 10%.

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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Calculate the size of tractor to pull a four bottom 35 cm MB plough through a depth of 10 cm. the soil resistance is 0.5 kg/cm^2. The speed of the tractor is 5.5 km/h, the transmission and tractive efficiency of the tractor being 85% and 30% respectively.

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

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

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

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A four-stroke diesel engine operating at 1200 rpm uses 0.1 kg of fuel in 5 minutes and has the brake specific fuel consumption equals to 0.1910 kg\BHP\h. Calculate the torque developed.

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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In mower, the grass board is provided at the ___________

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

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A seed drill has 8 cells on cup feed metering mechanism. The rolling of ground wheel to that of the roller is 2:3. If drilling is done at a forward speed of 3.5 km/h, spacing in the rows in mm will be ___________

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

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A hydraulic sprayer fitted with hollow cone nozzle is required to be calibrated for application rate 150 l/ha. The sprayer speed is 6.5/h, nozzle spacing is 50 cm, and the available 0.787 mm orifice diameter nozzle is rated at 0.473 l/min. What will be the nozzle flow rate?

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

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