Irrigation and it’s Methods Irrigation may be defined as the science of artificial application of water to the land or soil. It is the replacement of rainfall with water from another source in order to grow crops. Several methods of irrigation are used today depending on the water availability and the type of crop to be irrigated. Some of these methods are: 1) Flood irrigation: In flood irrigation‚ a large amount of water is brought to the field and flows on the ground among the crops
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these is a turboprop engine? a) RB211 b) Dart c) Adour d) Spey 7. A turbine is made up of a number of stages‚ each stage consisting of nozzle guide vanes (NGV’s) and rotor blades. How are these arranged? a) NGV’s are on top of rotor blades b) Rotor blades are on top of NGV’s c) NGV’s are in front of rotor blades d) Rotor blades are in front of NGV’s 8. The drawing indicates which type of thrust reverser system? a) Ramjets b) Clamshell doors c) Translating Cowl d) Retractable ejector
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DC motor is a mechanically commutated electric motor powered from direct current (DC). The stator is stationary in space by definition and therefore so is its current. The current in the rotor is switched by the commutator to also be stationary in space. This is how the relative angle between the stator and rotor magnetic flux is maintained near 90 degrees‚ which generates the maximum torque. DC motors have a rotating armature winding but non-rotating armature magnetic field and a static field
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Drones‚ A Dangerous Future? As more and more time goes by‚ technology advances providing more efficient and unique things that the average person can buy. Drones have become very popular items that many children want in the US want. Drones are remote control copters that any person can buy and fly around. Some of the most popular drones include the DJI phantom‚ and parrot brands (PC Magazine). These brands include the best drones offered to the common People. The more and more drones become common
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| Dante ’s Satan and the Medieval Thought | Sympathy for the Devil | | Maria Roberta Vella (374890M) | 2/6/2013 | | Dante ’s Satan and the Medieval thought When reading the Divine Comedy‚ one realizes that the Middle Ages‚ as far as they may be‚ they preserve a reality so close to us that one remains amazed. The question that arises naturally is whether it is Dante‚ that looks forward and is therefore able to make us conscious of our past and consequently relate the
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problems with the torque: the effect produced by the rotor to force the fuselage to rotate in the opposite direction than the engine. Starting the 20th century‚ they were taking one step forward and two steps back in their advancement’s. They had problems with dissymmetry of lift: the action that tended to cause the early designed copters to flip over. This had baffled them. Then the swashplate was invented with cyclic pitch control‚ which allowed the rotor blade angles to be altered so that the lift would
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POWER SYSTEM STABILITY STUDIES USING MATLAB A Project Report Submitted in partial fulfillment of the requirements for the degree of Bachelor of Technology in Electrical Engineering By PRANAMITA BASU ( Roll No. – 10502064 ) AISWARYA HARICHANDAN ( Roll No. – 10502019 ) National Institute of Technology Rourkela Rourkela-769008‚ Orissa POWER SYSTEM STABILITY STUDIES USING MATLAB A Project Report Submitted in partial fulfillment of the requirements for the degree of Technology Bachelor
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blades are mounted on a shaft to form a rotor. A blade acts much like an airplane wing. When the wind blows‚ a pocket of low-pressure air forms on the downwind side of the blade. The low-pressure air pocket then pulls the blade toward it‚ causing the rotor to turn. This is called lift. The force of the lift is actually much stronger than the wind’s force against the front side of the blade‚ which is called drag. The combination of lift and drag causes the rotor to spin like a propeller‚ and the turning
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MEEN 626 - Lubrication Theory:Class Syllabus FALL06 Instructor: Dr. Luis San Andrés‚ ENPH 118‚ Phones: 5-0160‚ 2-4744‚ LsanAndres@Mengr.tamu.edu Class Time: T‚ R 3:55-5:10 pm ENPH 215 Office hours: R: 2:00-3:00 p.m.‚ or by appointment. Catalog Course Description: Development of Reynolds Equation from Navier Stokes equations for study of hydrodynamic lubrication theory as the basis for bearing design; applications to simple thrust and journal bearings and pads of various geometries; hydrostatic lubrication
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displacement of the shaft. RVDT give linear output up to displacement of +-40 degree. Then output starts becoming nonlinear. Operation of RVDT’s The two induced voltages of the secondary windings‚ V1 and V2‚ vary linearly to the mechanical angle of the rotor‚ : where G is the gain or sensitivity. The second voltage can be reverse determines by: The difference V1 V2 gives a proportional voltage: and the sum of the voltages is a constant : This constant
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