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Q. Explain Sulphidation process?
The presence of sulphur converts the surface of the metal to a sulphide scale which is generally more destructive than an oxide scale. Sulphidation is highly dependent on the form in which the sulphur exists, and corrosivity generally increases as temperature increases. Resistance to attack is improved by the addition of Cr and Si, as well as Al to a lesser extent. The addition of nickel may contribute to sulphide scaling.
Classification Two categories of plastics are identified. Those are: thermosetting plastics and thermoplastics. Plastics generally cannot stand higher temperatures. They becom
how to prove that work done is a path function
The objective of the project is to protect damage of the DC motors. If the motor is not working it will be shown with red light, if working normally then green and if working at a
Question: The block diagram of a dc servo motor feed drive is shown Obtain the closed loop transfer function relating the output to the disturbance T L while V
How are the refrigerants classified? Describe the desirable property of a good refrigerant. Explain in brief the thermodynamics, safe and physical working property of an ideal r
Define the Advantages of Electro discharge machining 1. The surface finish obtained is very good. 2. This process can be used for any hard material. 3. Materials likes ca
Q. Vessels resting on concrete foundations? For vessels resting on concrete foundations, the allowable concrete bearing stress shall be 750 psi (5 MPa). The design loadings fo
(a) Illustrate First Law of Thermodynamics for a Closed System undergoing a change of state and show that ‘Energy' is a property of the system. (b) A cylinder contains 1 m 3 of
Geometric modelling: Geometric modelling is an integral part of any Computer-Aided-Design (CAD) system. Integration of geometric modelling; computer graphics along with design
Question: A 3-phase, 15 kV, 4-pole, cylindrical rotor synchronous generator is connected to infinite bus running at 50 Hz. The synchronous reactance of the machine is X s = 0.
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