Posted inBasics Strength of Materials
Posted inGATE Q & A
SECTION-4 (Q/A)
1. State the principle of chemical machining process? In chemical machining process, material is removed from the workpiece through a controlled etching or chemical attack of the workpiece material. 2. Name the etchants used in chemical machining process? a. Caustic Soda b. Hydrochloric acid c. Nitric acid d. Iron carbide. 3. Name some of the maskants used in CHM? a. Butyl rubber b. Neoprene rubber c. Polymers d. Polethylene, etc., 4. Write the principle of ECM process? ECM is based on the principle of Faradayโs laws of Electrolysis and reverse electroplating. In this process, the work piece is connected to positive terminal (anode) and the tool is connected to negative terminal (cathode). When the current is passed, the workpiece loses metal and the dissolved metal is carried out by circulating an electrolyte between the work and tool. 5. What are the requirements of tool materials in ECM process? a. It should be conductor of electricity.…