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Working of boiler:
Water is filled in boiler shell through the feed valve up to 2/3rd of shell. Water flows down through the down take header by means of descending water tubes and rises upwards through the uptake header and ascending tubes. Inclined tubes help in setting up the water circulation currents. The hot flue gasses coming from the combustion chamber are made to pass over tubes, under side of drum and super heater tubes. The baffle plates ensure longer contact time of flue gasses with the tubes. When water in tubes is heated, it begins to move upwards through the ascending tubes and cold water takes its place through the descending tubes. In this manner convection currents are set up.
The hottest gases being raised from the grate come in with that portion of water tube which is located on the highest side near the upper header. Water starts evaporating and mixture of water and steam thus formed reaches into boiler drum. Steam is collected in space above the water. This steam is lead to super heater then tubes for superheating. Superheated steam produced flows out through the stop valve.
Brazing Vs Welding Following are the differences between brazing and welding. (i) In brazing, the joint surfaces are not raised to fusion point (or melted) and the joint is
Punches Figure: Punches A bar which carries a sharp point at one end and used to make a permanent mark on a part is called punch. The point is hard and tempered so tha
Are the types of pumps selected (base mounted, in-line)? Locate pump on discharge side of boiler. Flexible connector used. Valving indicated, isolation valve on suction and dis
A ball is thrown from a point with a speed V at an angle of projection θ . From the same point and at the same instant, a person starts running with a constant speed V/2 to catc
Clutch Complaints Nature of complaints could be that of following : (a) Clutch judder (jerking) (b) Clutch slipping (c) Half clutch noise
How is bearing capacity of soil varied? The bearing capacity of soil varies not only with its strength but also with the magnitude and distribution of the load. When a load Q,
The following steps are taken to decarbonise the engine : Remove the exhaust muffler. Disconnect the spark plug. Remove the intake pipe bolt. Loosen the bolt de
give me assinment for Bearing material
Coil: A coil is used in ignition system to increase the voltage supplied by the battery or magneto. Coil
Determine resultant of four forces: D etermine resultant of four forces tangent to the circle of radius 3m shown in the figure given below. What will be the location of it
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