1. Of the following, which mechanism is used for the removal of material using Chemical milling process?
a) Material Vaporization
b) Chemical dissolution
c) Mechanical erosion
d) Mechanical abrasion
Explanation: Chemical dissolution takes place in Chemical milling for the removing the material.
2. Which of the following solutions cannot be used as chemical reactive solution in CHM?
a) Acidic solution
b) Alkaline solution
c) Neutral solution
d) None of the mentioned
Explanation: Both acidic or alkane solutions are used for chemical dissolution in Chemical milling.
3. By using Chemical machining, which of the following can be produced?
a) Pockets
b) Contours
c) Slots
d) All of the mentioned
Explanation: By the use of CHM, pockets, contours, slots and materials having high strength to weight ratio can be machined.
4. Pre cleaning is done on the work piece surface in order to achieve, which of the following factors?
a) To provide good adhesion
b) To provide clean surface
c) To assure the absence of contaminants
d) All of the mentioned
Explanation: All the factors mentioned above, are achieved thorough pre-cleaning process.
5. Type of mask depends on which of the factor/s, given below?
a) Size of work piece
b) Number of parts
c) Desired resolution
d) All of the mentioned
Explanation: All the factors mentioned above, are required to select the type of mask.
6. During Chemical milling, depth of etch is controlled by which factor of immersion?
a) Time
b) Mask method
c) Mask area
d) None of the mentioned
Explanation: As the immersion time increases, depth of the etching increases.
7. In Chemical milling, excessive flow of chemical reagent results in which of the following defects?
a) Channellings
b) Grooves
c) Ridges
d) All of the mentioned
Explanation: In Chemical milling, if the reagent flows excessively, then the defects mentioned above may occur.
8. CHM cannot eliminate which of the following defects?
a) Irregularities and dents
b) Surface scratches
c) Waviness
d) All of the mentioned
Explanation: CHM is not a finishing process as that of MAF, there are some sort of defects in Chemical milling.
9. Which of the following are the tools required for Chemical milling?
a) Maskants
b) Etchants
c) Scribing plates
d) All of the mentioned
Explanation: All the components mentioned above, are required to carry out Chemical milling process.
10. Which of the following are the materials used for making maskants?
a) Synthetic materials
b) Rubber materials
c) Polymeric materials
d) All of the mentioned
Explanation: All the materials mentioned above, can be used for making maskants.