Explore topic-wise MCQs in Advanced Machining.

This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Advanced Machining knowledge and support exam preparation. Choose a topic below to get started.

1.

WHAT_MUST_BE_THE_WORKING_VOLTAGE_IN_ELECTROCHEMICAL_MACHINING??$

A. 10 V
B. 20 V
C. 30 V
D. 40 V
Answer» C. 30 V
Discussion
2.

For a better surface finish, which type of current distribution is required?$

A. Even
B. Uneven
C. All of the mentioned
D. None of the mentioned
Answer» B. Uneven
Discussion
3.

Surface roughness depend on which of the following quantities?$

A. Crystallographic irregularities
B. Alloy composition
C. Distribution of current density
D. All of the mentioned
Answer» E.
Discussion
4.

In Electrochemical machining, larger grain size causes which type of finish?

A. Smoother
B. Rougher
C. Finer
D. All of the mentioned
Answer» C. Finer
Discussion
5.

Between which values does the side gap’s surface roughness vary?$

A. >1 µm
B. >3 µm
C. >5 µm
D. >7 µm
Answer» D. >7 ¬¨¬®¬¨¬µm
Discussion
6.

Between which values does the frontal gap’s surface roughness vary?$

A. 0.02 to 0.13 µm
B. 0.30 to 1.90 µm
C. 1.93 to 2.64 µm
D. 2.73 to 4.26 µm
Answer» C. 1.93 to 2.64 ¬¨¬®¬¨¬µm
Discussion
7.

What is the value of moderate level of pH of electrolyte used?

A. 1 – 2
B. 2 – 4
C. 4 – 10
D. All of the mentioned
Answer» D. All of the mentioned
Discussion
8.

In practice, what must be the temperature of electrolyte used in ECM?

A. 10 – 20<sup>o</sup>C
B. 20 – 40<sup>o</sup>C
C. 60 – 80<sup>o</sup>C
D. 80 – 100<sup>o</sup>C
Answer» D. 80 ‚Äö√Ñ√∂‚àö√ë‚àö¬® 100<sup>o</sup>C
Discussion
9.

State whether following statement is true or false about electrolyte in ECM.

A.
B. True
Answer» B. True
Discussion
10.

When machining Ti, in Nacl electrolyte, what values of current efficiencies are obtained?

A. 10 – 20 %
B. 20 – 30 %
C. 30 – 50 %
D. 50 – 80 %
Answer» B. 20 ‚Äö√Ñ√∂‚àö√ë‚àö¬® 30 %
Discussion
11.

When the electrolyte flow is low, what happens to the current efficiency?

A. Increases
B. Decreases
C. Remains same
D. Increase and then decrease
Answer» C. Remains same
Discussion
12.

Nickel can be machined with 100% current efficiency, when current density value is _____.

A. 10 A/cm<sup>2</sup>
B. 25 A/cm<sup>2</sup>
C. 45 A/cm<sup>2</sup>
D. 80 A/cm<sup>2</sup>
Answer» C. 45 A/cm<sup>2</sup>
Discussion
13.

For alloys, which type of electrolyte is used in ECM?

A. Single component
B. Double component
C. Multi component
D. Triple component
Answer» D. Triple component
Discussion
14.

Better surface finish and higher accuracy depend on which of the factors below?

A. Chemical composition of electrolyte
B. Current density
C. All of the mentioned
D. None of the mentioned
Answer» D. None of the mentioned
Discussion
15.

Electro chemical dissolution phase starts with the movement of ions between which two components?

A. Cathode and anode
B. Cathode and power source
C. Power source and anode
D. Power source and electrolyte
Answer» B. Cathode and power source
Discussion