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WorksheetsQUIZ on ECM and CHM
Total questions: 20
Worksheet time: 7mins
In the ECM process workpiece is usually connected to the negative electrode
True
False
In the ECM process tool is usually connected to the cathode
True
False
Electrochemical machining is also referred as
cathodic cutting
conventional cutting
electrical cutting
anodic cutting
Which carries the electric current b/w the positive and negative electrode?
DC Power source
Electrolyte
Anode
Cathode
Which of the following is correct about ECM?
Erosion of metal takes place as a reverse process of electroplating
Thermal stresses are induced
Mechanical stresses are induced
None of the mentioned
Which of the following material cannot be machined using electrochemical machining?
Iron
Aluminum
Copper
Wood
Electrolytes used in ECM must posses
Low electrical conductivity
Low chemical stability
High electrical conductivity
None of the mentioned
Which of the following is not a function of electrolyte in ECM?
It completes the circuit
It helps in electrochemical reaction
It carries away heat and waste product
It provide non reactive environment
Insulation material used in ECM
Porcelain
Vinyl
Teflon
All of the above
Due to sharp edge and no insulation, tapering effect will be more
True
False
In advanced machining processes, what is the full form of CHM?
Chemical machining
Chemical manufacturing
Chemical meeting
None of the mentioned
Of the following, which mechanism is used for the removal of material using Chemical milling process?
Material Vaporization
Chemical dissolution
Mechanical erosion
Mechanical abrasion
Which of the following solutions cannot be used as chemical reactive solution in CHM?
Acidic solution
Alkaline solution
Neutral solution
None of the mentioned
By using Chemical machining, which of the following can be produced?
Pockets
Contours
Slots
All of the mentioned
Pre cleaning is done on the work piece surface in order to achieve, which of the following factors?
To provide good adhesion
To provide clean surface
To assure the absence of contaminants
All of the mentioned
Special coatings applied on work piece materials in order to protect them from chemical reaction are known as _________
Maskants
Protective coverings
Protective varnishing
None of the mentioned
During Chemical milling, depth of etch is controlled by which factor of immersion?
Time
Mask Method
Mask Area
None of the mentioned
“At higher temperatures, faster etching rates occur in Chemical milling.”
True
False
Chemical machining is done by means of a strong chemical reagent is called as
Maskant
Etchant
Resistant
Coolant
Which method is used to remove oxide films formed during etching
Hot water bath
Chlorine bath
Oxidizing bath
De-oxidizing bath
