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Q. Explain about Ducts and Flues in steam generators?
All air ducts and gas flues connecting the forced draft fan, fan intake silencer, preheater, and transition piece at the generator outlet shall be supplied.
Ducting shall be of continuous seal welded construction to ensure air tightness, with gasketed / flanged connections for field assembly.
Ducting shall be adequately reinforced and stiffened.
Ducting design shall be based on maximum discharge fan pressure at minimum design temperature. Maximum velocity in intake duct shall be 60 ft/s (18.3 m/s). Maximum velocity in flue gas shall be 90 ft/s (27.5 m/s).
Ducting shall be sized to limit the dynamic head at the point of maximum velocity to no more than ten percent of the burner pressure drop at firing conditions.
Minimum thickness of air ducting shall be 3/16 in (5 mm) for air ducting and 1/4 in (6 mm) for flue gas ducting.
Q. Corrosive properties of caustic? Sodium hydroxide, more commonly known as Caustic Soda or simply ‘Caustic', is widely used in the petrochemical industry to neutralize acidic
Provide the various considerations to be taken in designing the cast iron housing for a heavy duty machines?
Q. Explain working of Nozzles? Nozzles supporting agitators, pumps, or other mechanical equipment, shall be suitably reinforced to withstand the mechanical loadings, specified
brief description of resonant cavities
Seam Welding Seam welding is different from spot welding by the fact that roller type electrodes are used in the former case. The principle and process of welding are the same
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Describe with suitable diagram the governing of impulse turbines. What are design aspects of Pelton wheel turbine and also explain all the terms. Derive mathematical formula
The first successful numerical machine tool was developed at MIT in the year:
step to draw velocity and accelartion diagram
The Shaft is made of a material with an allowable shear strength of 80 Mpa. a. Develop the torque diagram b. Determine the minimum acceptable diameter of the shaft
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