Question 41 : State whether following statement is true of false regarding ECG process.
'In ECG process, filtering and disposal of electrolyte is not necessary.'
1. True
2. False
3.
4.
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Question 42 : Which of the following are the disadvantages of ECG process?
1. High capital cost
2. Limited to conductive materials
3. Corrosive nature
4. All of the mentioned
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Question 43 : What are the advantages of machining in Electro chemical grinding?
1. Good surface quality
2. Absence of distortion
3. Longer wheel life
4. All of the mentioned
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Question 44 : What are the applications of Electro chemical grinding process?
1. Milling the material
2. Tool and cutter sharpening
3. Cutting off
4. All of the mentioned
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Question 45 : What are the machining speeds recommended for high surface quality?
1. 1 - 250 mm/min
2. 250 - 500 mm/min
3. 500 - 750 mm/min
4. 750 - 100 mm/min
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Question 46 : What are the values of voltages used for better surface quality?
1. 1 - 2 V
2. 2 - 3 V
3. 3 - 5 V
4. 5 - 8 V
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Question 47 : Surface finish in ECG depend on which of the following factors?
1. Metal machined
2. Abrasive size
3. Wheel speed
4. All of the mentioned
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Question 48 : What are the values of radii of corners obtained in ECG?
1. 0.15 to 0.225 mm
2. 0.25 to 0.375 mm
3. 0.45 to 0.525 mm
4. 0.55 to 0.675 mm
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Question 49 : Which type of voltages are recommended for closer tolerances in ECG?
1. Low
2. Moderate
3. High
4. Very high
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Question 50 : What are the values of accuracies obtained in ECG process?
1. ± 0.025 mm
2. ± 0.125 mm
3. ± 0.225 mm
4. ± 0.325 mm
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