

InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
151. |
Which of the following reactions takes place at the electrodes?(a) Generation of hydrogen(b) Dissolution of iron(c) Dissolution of NaCl(d) All of the mentionedThis question was posed to me in class test.I'm obligated to ask this question of ECM-Theory of ECM in division Electrochemical Processes of Advanced Machining |
Answer» CORRECT ANSWER is (d) All of the mentioned To elaborate: All the REACTIONS mentioned above, take place at different ELECTRODES in ECM. |
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152. |
Which of the following are some of the bad impacts on environment while using ECM?(a) Electrolyte splashing(b) Toxic gases release(c) Precipitation of solid matters(d) All of the mentionedI have been asked this question by my school teacher while I was bunking the class.I would like to ask this question from ECM-Environmental Impact topic in chapter Electrochemical Processes of Advanced Machining |
Answer» The CORRECT CHOICE is (d) All of the mentioned |
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153. |
Slurries mixing with toxic compounds produce, which of the following?(a) Solid precipitates(b) Liquid solutions(c) All of the mentioned(d) None of the mentionedI got this question during an internship interview.Question is taken from ECM-Environmental Impact topic in section Electrochemical Processes of Advanced Machining |
Answer» RIGHT answer is (a) Solid PRECIPITATES Easiest explanation: SLURRIES which MIX with TOXIC compounds such as chromate and ammonia precipitates solid matter in the electrolyte solution. |
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154. |
State whether the following statement is true or false regarding the limitations of ECM.(a) “In electrochemical machining, duplicating the tool is easier.”(b) True(c) FalseThe question was posed to me in unit test.My question is taken from ECM-Advantages and Disadvantages in portion Electrochemical Processes of Advanced Machining |
Answer» Correct answer is (b) True |
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155. |
How much amount of wear is present in the tool used in Electrochemical machining?(a) No wear(b) Low(c) Medium(d) HighI have been asked this question in an international level competition.My question is taken from ECM-Advantages and Disadvantages in chapter Electrochemical Processes of Advanced Machining |
Answer» The correct option is (a) No wear |
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156. |
Which of the following use ECM for different applications?(a) Gas turbines(b) Jet engines(c) Bio medical implants(d) All of the mentionedThe question was asked in an international level competition.My enquiry is from ECM-Applications and Micro-ECM topic in portion Electrochemical Processes of Advanced Machining |
Answer» RIGHT choice is (d) All of the mentioned The explanation: ECM has its APPLICATIONS in industries such as gas TURBINES, JET ENGINES, automobiles, medical etc. |
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157. |
What are the typical dimensional tolerances obtained in ECM when there is proper control of machining?(a) ± 0.01 mm(b) ± 0.025 mm(c) ± 0.13 mm(d) ± 0.25 mmThe question was asked during an interview for a job.My question is from ECM-Process Characteristics in portion Electrochemical Processes of Advanced Machining |
Answer» Correct OPTION is (b) ± 0.025 mm |
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158. |
Non stationary behaviour of ECM is due to, which of the factors below?(a) Gas generation(b) Heating(c) Passivation(d) All of the mentionedI have been asked this question at a job interview.This intriguing question originated from ECM-Process Control topic in section Electrochemical Processes of Advanced Machining |
Answer» Right ANSWER is (d) All of the mentioned |
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159. |
For high process accuracy, which of the following factors are needed?(a) High feed rate(b) High conductivity(c) High feed rate & High conductivity(d) None of the mentionedI had been asked this question in an online interview.This key question is from ECM-Process Characteristics in section Electrochemical Processes of Advanced Machining |
Answer» Correct option is (c) High feed rate & High conductivity |
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160. |
Nickel can be machined with 100% current efficiency, when current density value is ______________(a) 10 A/cm^2(b) 25 A/cm^2(c) 45 A/cm^2(d) 80 A/cm^2This question was posed to me by my school principal while I was bunking the class.This key question is from ECM-Process Characteristics topic in portion Electrochemical Processes of Advanced Machining |
Answer» RIGHT ANSWER is (b) 25 A/cm^2 The explanation: NICKEL is a metal SUGGESTED by Khayry, which can be machined at 100% current EFFICIENCY, if current density is 25 A/cm^2. |
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161. |
Selection of electrolyte does not depend on which of the following factors?(a) Work piece material(b) Dimensional tolerance(c) Heat affected zones(d) Machining productivityThis question was addressed to me in an interview for internship.This question is from ECM topic in section Electrochemical Processes of Advanced Machining |
Answer» The correct answer is (C) Heat AFFECTED zones |
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162. |
What must be the value of velocity of the electrolytic solution?(a) 10 to 15 m/s(b) 25 to 50 m/s(c) 60 to 100 m/s(d) 120 to 200 m/sThe question was posed to me in semester exam.My query is from ECM topic in division Electrochemical Processes of Advanced Machining |
Answer» Correct choice is (B) 25 to 50 m/s |
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163. |
For high strength or rigidity, which type of coatings are recommended for metals?(a) Other metal coatings(b) Non-metallic coatings(c) All of the mentioned(d) None of the mentionedThe question was asked in final exam.Asked question is from ECM in chapter Electrochemical Processes of Advanced Machining |
Answer» The CORRECT choice is (b) Non-metallic COATINGS |
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164. |
Electrolysis occur when which of the following takes place between electrodes?(a) Electric current flow(b) Electron flow(c) All of the mentioned(d) None of the mentionedI got this question in semester exam.My question is based upon Electro Chemical Machining-Introduction and Principle of electrolysis in chapter Electrochemical Processes of Advanced Machining |
Answer» Right ANSWER is (C) All of the mentioned |
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165. |
Which of the following are the simplest methods for applying the insulation on tools?(a) Spraying(b) Dipping(c) All of the mentioned(d) None of the mentionedThis question was posed to me in a national level competition.This question is from ECM in portion Electrochemical Processes of Advanced Machining |
Answer» The correct ANSWER is (c) All of the mentioned |
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166. |
Pumping of electrolyte through the narrow gaps causes, which type of forces on tool and work piece?(a) Large(b) Small(c) Negligible(d) No forceThe question was asked in an interview.My question is from ECM-Advantages and Disadvantages topic in portion Electrochemical Processes of Advanced Machining |
Answer» CORRECT option is (a) Large Best explanation: ELECTROLYTE pumping through the NARROW gaps gives rise to a large amount of FORCES on tool and work PIECES. |
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167. |
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 µmThis question was addressed to me in an interview for job.I want to ask this question from ECM-Process Characteristics topic in chapter Electrochemical Processes of Advanced Machining |
Answer» The correct ANSWER is (b) 0.30 to 1.90 µm |
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168. |
Tool insulation that __________ the side machining action is needed in the process of ECM.(a) Limits(b) Enhances(c) Maintains(d) None of the mentionedThis question was addressed to me by my school principal while I was bunking the class.This question is from ECM-Process Characteristics topic in portion Electrochemical Processes of Advanced Machining |
Answer» CORRECT ANSWER is (a) Limits For explanation: Tool INSULATION is needed, which limits the machining of other sides of work PIECE. |
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169. |
Surface roughness depend on which of the following quantities?(a) Crystallographic irregularities(b) Alloy composition(c) Distribution of current density(d) All of the mentionedI got this question by my college director while I was bunking the class.Origin of the question is ECM-Process Characteristics in portion Electrochemical Processes of Advanced Machining |
Answer» RIGHT answer is (d) All of the mentioned Easiest explanation: Surface roughness of machined surface in ECM depend on crystallographic irregularities, alloy composition, CURRENT DENSITY distribution, dislocations and GRAIN boundaries. |
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170. |
In ECM, gap increase proportional to which relation of time below?(a) Square of time(b) Square root of time(c) Cube of time(d) Cube root of timeI have been asked this question by my school teacher while I was bunking the class.Asked question is from ECM-Basic Working Principles topic in portion Electrochemical Processes of Advanced Machining |
Answer» Correct ANSWER is (b) Square root of time |
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171. |
State whether the following statement is true or false regarding the electrolytic solution.(a) “In ECM, formation of passive film is recommended.”(b) True(c) FalseThe question was posed to me in unit test.Query is from ECM topic in chapter Electrochemical Processes of Advanced Machining |
Answer» CORRECT choice is (b) True Explanation: ELECTROLYTIC solution should AVOID formation of PASSIVE layers on ANODE. |
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172. |
Which of the following reactions take place at cathode?(a) Generation of hydrogen(b) Dissolution of iron(c) Dissolution of NaCl(d) All of the mentionedI got this question in quiz.The doubt is from ECM-Theory of ECM topic in section Electrochemical Processes of Advanced Machining |
Answer» The correct ANSWER is (a) Generation of HYDROGEN |
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173. |
During deburring and die sinking which of the following electrolyte gives high surface quality and accuracy?(a) NaNO3(b) HNO3(c) NaCl(d) All of the mentionedThe question was posed to me in an interview.Origin of the question is ECM-Environmental Impact in section Electrochemical Processes of Advanced Machining |
Answer» The CORRECT choice is (a) NaNO3 |
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174. |
What is the full form of ECDR in advanced machining processes?(a) Electrochemical Dissolution(b) Electrochemical Drilling(c) Electrochemical Degradation(d) Electrochemical DevastationThe question was asked by my college professor while I was bunking the class.Enquiry is from Electro Chemical Drilling topic in division Electrochemical Processes of Advanced Machining |
Answer» RIGHT option is (B) Electrochemical Drilling Easy explanation: In advanced machining PROCESSES, full FORM of ECDR is Electrochemical Drilling. |
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175. |
Dissolution of metal containing chrome results in which of the toxic compounds?(a) Toxic chromate(b) Ammonia(c) Toxic chromate & Ammonia(d) None of the mentionedI had been asked this question during an online exam.This intriguing question comes from ECM-Environmental Impact topic in portion Electrochemical Processes of Advanced Machining |
Answer» The correct option is (C) Toxic chromate & Ammonia |
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176. |
Which of the following processes can be done using ECM?(a) Die sinking(b) Profiling and contouring(c) Drilling and trepanning(d) All of the mentionedThis question was posed to me in class test.Query is from ECM-Applications and Micro-ECM topic in chapter Electrochemical Processes of Advanced Machining |
Answer» Correct CHOICE is (d) All of the mentioned |
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177. |
At constant feed rates what happens to gap thickness?(a) Increases(b) Decreases(c) Becomes constant(d) None of the mentionedThis question was addressed to me during an interview.I'm obligated to ask this question of ECM-Basic Working Principles topic in division Electrochemical Processes of Advanced Machining |
Answer» CORRECT option is (c) Becomes CONSTANT The explanation is: At constant feed rate, work piece becomes STATIONARY and THUS the gap THICKNESS becomes constant. |
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178. |
What is the value of velocity with which, electrolyte flows in the inter electrode gap?(a) >1 m/s(b) >3 m/s(c) >5 m/s(d) >10 m/sI have been asked this question at a job interview.Question is from ECM-Theory of ECM topic in division Electrochemical Processes of Advanced Machining |
Answer» RIGHT CHOICE is (c) >5 m/s Easy explanation: The velocity of the electrolytic solution must be greater than 5 m/s, in ORDER to intensify the mass and charge transfer. |
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179. |
What are the values of current densities used in ECM?(a) 0.1 to 2 A/cm^2(b) 5 to 500 A/cm^2(c) 600 to 1000 A/cm^2(d) 1200 to 2800 A/cm^2This question was addressed to me in an online interview.This intriguing question comes from ECM topic in chapter Electrochemical Processes of Advanced Machining |
Answer» The correct option is (b) 5 to 500 A/cm^2 |
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180. |
Chemical equivalent is the ratio of which of the following factors?(a) Work piece valence to the atomic weight(b) Atomic weight to work piece valence(c) Tool valence to molecular weight(d) Molecular weight to tool valenceThis question was posed to me in a national level competition.I want to ask this question from Electro Chemical Machining-Introduction and Principle of electrolysis in division Electrochemical Processes of Advanced Machining |
Answer» The correct answer is (b) Atomic weight to work PIECE VALENCE |
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181. |
When was the first significant development of ECM occurred?(a) 1920s(b) 1930s(c) 1950s(d) 1960sI had been asked this question in exam.Asked question is from Electro Chemical Machining-Introduction and Principle of electrolysis topic in chapter Electrochemical Processes of Advanced Machining |
Answer» The correct OPTION is (c) 1950S |
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182. |
In the following scientists, who was the one to introduce first patent on ECM?(a) Balamuth(b) Steve O Flawer(c) Gusseff(d) McGeoughThe question was posed to me during an interview.Question is taken from Electro Chemical Machining-Introduction and Principle of electrolysis in portion Electrochemical Processes of Advanced Machining |
Answer» CORRECT option is (C) GUSSEFF For explanation I would say: Gusseff was the one, who introduced the first patent on ECM in 1929. |
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183. |
Which of the following parts of the body can be contaminated while using ECM?(a) Skin(b) Eyes(c) Skin & Eyes(d) None of the mentionedThe question was posed to me in a national level competition.Enquiry is from ECM-Environmental Impact topic in division Electrochemical Processes of Advanced Machining |
Answer» Right choice is (c) SKIN & Eyes |
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184. |
If electro chemical machining is applied under appropriate conditions, how much amount of health dangers can occur?(a) Small amount(b) Limited amount(c) Large amount(d) Very large amountThe question was asked by my school principal while I was bunking the class.This interesting question is from ECM-Environmental Impact in chapter Electrochemical Processes of Advanced Machining |
Answer» The correct ANSWER is (b) LIMITED amount |
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185. |
Apparent current efficiency is due to which of the following factors?(a) Choice of wrong valence(b) Passivation of anodic surface(c) Gas evolution at anode(d) All of the mentionedThe question was asked in homework.My doubt is from ECM-Basic Working Principles in division Electrochemical Processes of Advanced Machining |
Answer» CORRECT option is (d) All of the mentioned The explanation: Current efficiency may be apparent because of choice of wrong valence, passivation of anodic SURFACE or GAS evolution at anodic surface. |
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186. |
Compared to the tool used in ECM, how should be the work piece size?(a) Greater than(b) Smaller than(c) Same as tool(d) None of the mentionedI got this question in an interview for job.My question is based upon ECM in section Electrochemical Processes of Advanced Machining |
Answer» Correct option is (a) Greater than |
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187. |
How does the current pass between the two electrodes in ECM?(a) Electrolytic solution(b) Direct contact of electrodes(c) All of the mentioned(d) None of the mentionedThis question was addressed to me during a job interview.The above asked question is from ECM-Theory of ECM topic in portion Electrochemical Processes of Advanced Machining |
Answer» Correct choice is (a) Electrolytic solution |
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188. |
What are the feed rates used in Electrochemical drilling?(a) 0.1 to 0.6 mm/min(b) 0.6 to 1 mm/min(c) 1 to 5 mm/min(d) 6 to 15 mm/minThe question was asked by my school principal while I was bunking the class.Question is taken from Electro Chemical Drilling topic in division Electrochemical Processes of Advanced Machining |
Answer» Right choice is (c) 1 to 5 mm/min |
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189. |
What should be done to the electrolyte with solid matter?(a) Can be reused(b) Disposed off(c) No disposing is necessary(d) All of the mentionedI got this question in my homework.I need to ask this question from ECM-Environmental Impact topic in section Electrochemical Processes of Advanced Machining |
Answer» Right choice is (B) DISPOSED off |
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190. |
Machining conditions leading to high accuracy are associated with ________ surface roughness and ________ productivity.(a) Greater, greater(b) Smaller, greater(c) Greater, smaller(d) Smaller, smallerI had been asked this question in quiz.My query is from ECM-Process Control in section Electrochemical Processes of Advanced Machining |
Answer» The CORRECT answer is (B) Smaller, greater |
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191. |
Which of the following are the limitations of electro chemical machining?(a) Removal of hydrogen(b) Handling the electrolyte(c) Energy consumption(d) All of the mentionedI have been asked this question in an online quiz.My query is from ECM-Advantages and Disadvantages in division Electrochemical Processes of Advanced Machining |
Answer» The correct answer is (d) All of the mentioned |
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192. |
It is difficult to machine inner radii smaller than __________ and outer radii less than ________ in ECM.(a) 0.1 mm, 0.2 mm(b) 0.5 mm, 0.8 mm(c) 0.8 mm, 0.5 mm(d) 0.2 mm, 0.1 mmI had been asked this question at a job interview.My doubt stems from ECM-Process Characteristics in portion Electrochemical Processes of Advanced Machining |
Answer» Correct option is (c) 0.8 MM, 0.5 mm |
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193. |
If there is an increase in the electrolyte flow, what happens to the rate of film formation?(a) Increases(b) Decreases(c) Remains same(d) All of the mentionedI had been asked this question in quiz.My question is taken from ECM-Process Characteristics topic in portion Electrochemical Processes of Advanced Machining |
Answer» The correct option is (b) DECREASES |
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194. |
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 electrolyteThe question was posed to me during an internship interview.I want to ask this question from ECM-Process Characteristics in section Electrochemical Processes of Advanced Machining |
Answer» The correct answer is (a) Cathode and anode |
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195. |
State whether the following statement is true or false regarding the tools of ECM.(a) , cathodes are produced at high costs and less accurately.”(b) True(c) FalseI got this question during an interview for a job.The question is from ECM topic in chapter Electrochemical Processes of Advanced Machining |
Answer» The correct CHOICE is (B) True |
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196. |
What are the other features of electrolytic solution in ECM?(a) Non toxic(b) Less erosive(c) Less viscous(d) All of the mentionedI have been asked this question in homework.Asked question is from ECM in section Electrochemical Processes of Advanced Machining |
Answer» RIGHT answer is (d) All of the mentioned Easiest explanation: Electrolytic SOLUTION should be nontoxic, less viscous and less EROSIVE. |
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197. |
Negatively charged particles (anions) move towards which electrode?(a) Anode(b) Cathode(c) Anode & Cathode(d) None of the mentionedI have been asked this question in an online interview.My question is taken from ECM-Theory of ECM in section Electrochemical Processes of Advanced Machining |
Answer» Correct answer is (a) ANODE |
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198. |
Amount of mass dissolved is directly proportional to which of the following quantities?(a) Amount of electricity(b) Frequency of vibrations(c) Amplitude of oscillations(d) All of the mentionedThe question was asked during an internship interview.My question is taken from Electro Chemical Machining-Introduction and Principle of electrolysis in chapter Electrochemical Processes of Advanced Machining |
Answer» Right choice is (a) AMOUNT of electricity |
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199. |
State whether the following statement is true or false regarding the environmental impacts of ECM.(a) “In ECM, accumulation of toxic compounds is due to nitrate reduction at tool cathode.”(b) True(c) FalseI have been asked this question in class test.My doubt stems from ECM-Environmental Impact in section Electrochemical Processes of Advanced Machining |
Answer» Correct CHOICE is (a) “In ECM, accumulation of TOXIC compounds is DUE to NITRATE reduction at tool cathode.” |
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200. |
Micro ECM is used to machine which type of parts?(a) Large parts(b) Micro parts(c) Normal sized parts(d) All of the mentionedThe question was posed to me in quiz.My question is based upon ECM-Applications and Micro-ECM in division Electrochemical Processes of Advanced Machining |
Answer» The CORRECT OPTION is (b) Micro PARTS |
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