1. What is the working principle of Chemical Machining (CHM)?

• a) Mechanical abrasion to remove material

• b) Chemical etching using acids or alkalis to dissolve material

• c) Electrical energy to remove material

• d) High-pressure water jet cutting

2. Which of the following is a key factor affecting the rate of material removal in Chemical Machining?

• a) Type and concentration of etchant

• b) Electrical conductivity of the workpiece

• c) Speed of tool rotation

• d) Temperature of the coolant

3. Which of the following is NOT a maskant application technique in Chemical Machining?

• a) Screen printing

• b) Spray coating

• c) Dip coating

• d) Electroplating

4. Electrochemical Machining (ECM) removes material by which of the following processes?

• a) Thermal melting

• b) Mechanical abrasion

• c) Anodic dissolution

• d) Laser ablation

5. In Electrochemical Machining (ECM), which parameter has the most significant impact on the material removal rate?

• a) Type of electrolyte used

• b) Rotational speed of the tool

• c) Workpiece hardness

• d) Diameter of the tool

6. What is the primary application of Electrochemical Honing (ECH)?

• a) Producing deep holes in soft materials

• b) Finishing of gears and splines

• c) Removing burrs from delicate parts

• d) Creating high-precision surface finishes in hardened materials

7. Electrochemical Grinding (ECG) combines which two processes?

• a) Chemical machining and ultrasonic machining

• b) Electrochemical machining and conventional grinding

• c) Water jet machining and abrasive jet machining

• d) Plasma arc cutting and grinding

8. Which of the following is a key advantage of Electrochemical Machining (ECM)?

• a) High tool wear

• b) Can machine complex shapes in hard materials

• c) High thermal distortion

• d) Requires frequent tool replacement

9. What is the main purpose of Electrochemical Deburring (ECD)?

• a) Creating holes in soft materials

• b) Removing sharp edges and burrs from machined components

• c) Increasing surface roughness of metal parts

• d) Welding metal surfaces together

10. Which of the following is a limitation of Electrochemical Machining (ECM)?

• a) Cannot machine hard materials

• b) High tool wear during the process

• c) High initial cost and maintenance

• d) Generates excessive heat that melts the workpiece