Decriptive

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Write short notes, not exceeding 150 words each, on of the following: (1) Homogenization of milk, (2) Extraction of oil from rice bran, (3) Strain gauge torque sensor, (4) Vapor compression refrigeration system, (5) Computer memory?

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1. Homogenization of milk: Homogenization is a more recently invented process and it has been called “the worst thing that dairymen did to milk.” When milk is homogenized, it is pushed through a fine filter at pressures of 4,000 pounds per square inch. In this process, the fat globules are made smaller by a factor […]

What is producer gas? With a schematic diagram explain the working of a downdraft type gasifier?

What is producer gas? With a schematic diagram explain the working of a downdraft type gasifier?

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Producer gas Producer gas is fuel gas that is manufactured from material such as coal, as opposed to natural gas. In the USA, producer gas may be wood gas produced in a gasifier and used to power cars, town gas, originally produced from coal, for sale to consumers, and syngas, used as a fuel source […]

Write short notes, not exceeding 150 words each, on any Four of the following: (1) Radiator Pressure cap (2) Starting aids used in diesel tractors (3) Paddy drum seeder (4) Savonius wind rotor (5) Solar photo-voltanic cells

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1. Radiator Pressure Cap: The pressure cap is similar to the safety valve found on a kitchen pressure cooker. The pressure cap seals the operating cooling system forcing the hot pressurized coolant to carry approximately 50 more degrees of heat than the normal (212) boiling point of water. When seepage or leaks have reduced the […]

Briefly explain supervised classification and unsupervised classification?

Briefly explain supervised classification and unsupervised classification?

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Digital image classification techniques group pixels to represent land cover features. Land cover could be forested, urban, agricultural and other types of features.  There are three main image classification techniques. Image Classification Techniques in Remote Sensing:   Remote Sensing Image Classification Techniques   Unsupervised image classification Supervised image classification Object-based image analysis Pixels are the […]

Define the term ‘image processing’ and list its main steps?

Define the term ‘image processing’ and list its main steps?

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Image Processing In imaging science, image processing is processing of images using mathematical operations by using any form of signal processing for which the input is an image, a series of images, or a video, such as a photograph or video frame; the output of image processing may be either an image or a set […]

What is runoff inducement in relation to water harvesting? Discuss briefly five methods of runoff inducements?

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Runoff Inducement The term water harvesting is used to describe the process by which water is collected from an area, that may have been modified or treated to increase surface runoff, and stored for use later. Some general ideas and concepts are presented on runoff inducement techniques (such as surface modification, cover sheets, and soil […]

What are the different stages in the development of gully? Describe them briefly?

What are the different stages in the development of gully? Describe them briefly?

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Generally, gullies are formed by an increase in surface run-off. Therefore, minimizing surface run-off is essential in gully control. Watersheds deteriorate because of man’s misuse of the land, short intensive rainstorms, prolonged rains of moderate intensity, and rapid snow melts. These precipitation factors also turn into high run-off which causes flooding and forms gullies. In […]

What is the function of a foot valve in a centrifugal pump? Mention principal causes of pump troubles with remedies?

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Foot Valve Various types of valves are required to maintain optimum function of water and air pumps, and among these valves are foot valves. Foot valves are used to prime up a centrifugal pump; they are known for their efficacy and affordability. Foot valves are a type of check valve and are placed at the […]

Draw a neat diagram showing different types of aquifers. Indicate and explain the various types of wells that result from these aquifers?

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Aquifers are divided into two types: Unconfined Confined   An unconfined aquifer is often shallow, and the vadose zone above it primarily contains permeable material. The top of the aquifer is the water table. The water table moves up and down on a seasonal basis. It is highest during the wet season owing to higher […]

Mention four types of irrigation efficiency with expressions to calculate each?

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Irrigation efficiencies Not all water taken from a source (river, well) reaches the root zone of the plants. Part of the water is lost during transport through the canals and in the fields. The remaining part is stored in the root zone and eventually used by the plants. In other words, only part of the […]