Advanced Machining and Processes Mock Test 7

10%

Question 1 of 10

1. Cavities with, which of the following factors can be produced using Electro discharge machining?

None of the mentioned

Thin walls & Fine features

Thin walls

Fine features

Question 1 of 10

Question 2 of 10

2. In order to produce a proper radius, by how much should the tool tip overlap the machined area?

1 to 1.5 mm

1.5 to 2 mm

2 to 2.5 mm

0.5 to 1 mm

Question 2 of 10

Question 3 of 10

3. What is the value of pressure of electrolyte used in ECDB process?

0.1 to 0.2 MPa

1.1 to 1.5 MPa

0.7 to 0.9 MPa

0.3 to 0.5 MPa

Question 3 of 10

Question 4 of 10

4. When the electrode gap is too small or electrodes are in contact, how much material is removed?

30%

20%

10%

No material removed

Question 4 of 10

Question 5 of 10

5. Which of the following can be used as dielectric fluids in EDM?

Silicon fluids

Kerosene

All of the mentioned

Distilled water

Question 5 of 10

Question 6 of 10

6. How much extra tolerances are achieved when we choose proper variables?

± 10 mm

± 15 mm

± 5 mm

± 20 mm

Question 6 of 10

Question 7 of 10

7. What happens to the crater size if we decrease the pulse time keeping the current constant?

Increase

Decrease

Increase and decrease

None of the mentioned

Question 7 of 10

Question 8 of 10

8. State whether the following statement is true or false regarding materials used in Electro discharge machining.
“In metals, copper graphite has less electrical conductivity than graphite.”

False

True

Question 8 of 10

Question 9 of 10

9. Copper has _________ Electro discharge machining wear and _________ conductivity.

Bad, worse

Good, worse

Good, better

Bad, better

Question 9 of 10

Question 10 of 10

10. Electrode orbiting ________ the flushing of dielectric fluid in Electro discharge machining.

Degrades

Improves

Reduces

Decreases

Question 10 of 10