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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.
Simply supported beam - Shear Force diagram: A simply supported beam of length 8 m is subjected to a consistently varying load from zero at centre to 3 t/m at both of ends. Dr
Advantages of welding process Welding results in a good saving of material and reduced labour content of production. Low manufacturing costs. Dependability of the me
Permanent Way: Definition In railway engineering, the permanent way refers to the earthen formation and the track structure over it. Gauge The separation
operation
1) State five factors that must be considered when choosing a material. Discuss the importance to the engineer of each of these factors. 2) An engineer is planning to design a s
Determine the deflection under the loads: Determine the deflection under the loads as shown in Figure Solution ∑ F y = 0, so that R A + R B = 80 + 20 = 100 k
Q. Show the Geometric Similarity? When model is required to provide an aid merely for visualisation, scaler reproduction of form is sufficient which is termed Geometric Similar
Q. Find the dimension of strongest rectangular beam that can be cut out of log of 25 mm diameter. Sol .: b 2 + d 2 = 25 2 d 2 = 25 2 - b 2 As M/I = σ/y; M =
Determine the Forces in Members in Roof Truss Determine the forces in members EF, EL, FL, and LK in the roof truss shown below and state whether the members are in tension or
the movability of 3 bar mechanism is zero then how can we comment on instantaneous centre of it?
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