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Q. Explain a Tube Well?
Method of restoring or increasing the capacity of tube well is known as developing a Tube Wells. This is done to eliminate bridging of fine particles on the voids of the strainers. That is achieved by one of the following method -
a) Back water - by forcing compressed air in the tube well.
b) Surging - By raising & lowering of the Plunger in a well. Thus sand particles are subjected to severe agitation.
c) Gravel Packing - Around the tube well gravel of size varying from 12 mm to 50 mm are filled. It is increase the area around the well thus decrease the velocity of water.
Q. Two three-phase generators are supplying to a common balanced three-phase load of 30 kW at 0.8 power factor lagging. The per-phase impedance of the lines connecting the generato
Electromechanical Meters Electromechanical energy meters are based on the Ferraris Principle (see note in the margin). The working of these meters is explained. Working o
Find out Form factor and Peak factor: For the output of full wave rectifier, find out (a) RMS value, (b) Average value, (c) Form factor, and (d) Peak factor. S
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Q. Working of self - excited generators? For self-excited generators, residual magnetism must be present in the ferromagnetic circuit of the machine in order to start the self-
Consider the circuit shown in Figure (a) in which the switch S has been in position 1 for a long time. Let the switch be changed instantaneously to position 2 at t = 0. Obtain v(t)
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Athree-phase, wye-connected, round-rotor, 220- V, 60-Hz, synchronous motor, having a synchronous reactance of 1.27 per phase and negligible armature resistance, is connected in p
WHAT IS FET
Q. A synchronous motor operates continuously on the following duty cycle: 50 hp for 8 min, 100 hp for 8 min, 150 hp for 10 min, 120 hp for 20 min, and no load for 14min. Specify th
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