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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.
| 101. |
When compared to the conventional abrasive sawing, how many times faster is the MRR?(a) Twice(b) Thrice(c) Four(d) FiveI had been asked this question in my homework.My query is from EDM-Applications topic in section Thermal Processes of Advanced Machining |
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Answer» Correct option is (a) TWICE |
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| 102. |
What happens to the fatigue strength of alloys if altered surfaces are produced in Electro discharge machining?(a) Increases(b) Reduces(c) Enhances(d) ImprovesI have been asked this question during a job interview.I need to ask this question from EDM-Heat Affected Zone (HAZ) topic in division Thermal Processes of Advanced Machining |
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Answer» The correct option is (B) Reduces |
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| 103. |
What are the values of thickness of recast layers in Electro discharge machining?(a) 0.001 to 0.025 µm(b) 0.01 to 0.25 µm(c) 1 to 25 µm(d) 10 to 250 µmThe question was posed to me in quiz.This question is from EDM-Heat Affected Zone (HAZ) in chapter Thermal Processes of Advanced Machining |
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Answer» The correct ANSWER is (C) 1 to 25 µm |
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| 104. |
What is the value of thickness of recast layer obtained when power of 5 µJ is given?(a) 1 µm(b) 3 µm(c) 5 µm(d) 7 µmI had been asked this question in an international level competition.My question is from EDM-Heat Affected Zone (HAZ) in chapter Thermal Processes of Advanced Machining |
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Answer» The CORRECT ANSWER is (a) 1 µm |
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| 105. |
How much extra tolerances are achieved when we choose proper variables?(a) ± 5 mm(b) ± 10 mm(c) ± 15 mm(d) ± 20 mmThe question was asked in an international level competition.The question is from EDM-Surface Integrity in chapter Thermal Processes of Advanced Machining |
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Answer» Right answer is (a) ± 5 mm |
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| 106. |
What is the relation between the melting point and the material removal rate?(a) Directly Proportional(b) Inversely proportional(c) Indirectly proportional(d) None of the mentionedThe question was posed to me by my college professor while I was bunking the class.My doubt stems from EDM-Material Removal Rate in portion Thermal Processes of Advanced Machining |
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Answer» CORRECT OPTION is (b) Inversely proportional The explanation is: In Electro discharge MACHINING, MATERIAL removal RATE is inversely proportional to the melting point. |
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| 107. |
State whether the following statement is true or false regarding materials used in Electro discharge machining.(a) “In metals, copper graphite has less electrical conductivity than graphite.”(b) True(c) FalseThis question was posed to me in an interview.The doubt is from EDM-Machining System in division Thermal Processes of Advanced Machining |
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Answer» The correct OPTION is (B) True |
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| 108. |
When the electrode gap is too small or electrodes are in contact, how much material is removed?(a) 10%(b) 20%(c) 30%(d) No material removedI got this question in a national level competition.My doubt is from EDM-Mechanism of Material Removal topic in chapter Thermal Processes of Advanced Machining |
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Answer» Correct CHOICE is (d) No material removed |
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| 109. |
Between what values mentioned below, do the discharges and sparks usually vary?(a) 1 and 10,000(b) 500 and 500,000(c) 500,000 and 1,000,000(d) None of the mentionedThe question was asked in an interview for internship.My question is taken from EDM-Mechanism of Material Removal in division Thermal Processes of Advanced Machining |
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Answer» Correct option is (b) 500 and 500,000 |
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| 110. |
Which of the following mechanisms is used for material removal?(a) Electro discharge erosion(b) Magnetic abrasion(c) Electro chemical dissolution(d) Mechanical erosionThe question was posed to me in an interview for job.I want to ask this question from Electro Discharge Machining-Introduction topic in portion Thermal Processes of Advanced Machining |
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Answer» RIGHT CHOICE is (a) Electro DISCHARGE erosion The explanation: Material is removed by electro-discharge erosion (EDE) in EDM. |
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| 111. |
How much distortion is produced while machining using PBM?(a) 10%(b) 20%(c) 30%(d) No distortion is producedThe question was asked in a job interview.This is a very interesting question from PBM in portion Thermal Processes of Advanced Machining |
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Answer» CORRECT choice is (d) No distortion is produced The EXPLANATION is: Heat does not penetrate more than few MICRONS from the edges of the CUTS produced by machining USING PBM that produce no distortion. |
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| 112. |
What is the frequency of the pulse of electrons used in EBM process?(a) 10 Hz(b) 10^2 Hz(c) 10^3 Hz(d) 10^4 HzI had been asked this question in a national level competition.Enquiry is from Electronbeam Machining-Introduction, Equipment and Material removal in division Thermal Processes of Advanced Machining |
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Answer» RIGHT choice is (d) 10^4 HZ Easiest EXPLANATION: A pulsed electron beam at 10^4 Hz reduces the temperature of the WORK piece OUTSIDE the region being machined. |
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| 113. |
Which of the following lasers is used for organics and non-metallic materials in LBM?(a) CO2 + gas assisted(b) Pulsed CO2(c) Nd-YAG(d) RubyI got this question in an online interview.Question is from LBM-Applications in portion Thermal Processes of Advanced Machining |
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Answer» Right option is (b) PULSED CO2 |
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| 114. |
Which of the following lasers is used for cutting thick materials in LBM?(a) CO2 + gas assisted(b) CO2 only(c) Nd-YAG(d) RubyI have been asked this question during an online exam.My enquiry is from LBM-Applications topic in section Thermal Processes of Advanced Machining |
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Answer» Correct option is (a) CO2 + gas assisted |
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| 115. |
What are the values of entrance angles that vary in Laser drilling process?(a) 0.1 – 1 ^oC(b) 1 – 5 ^oC(c) 15 – 90 ^oC(d) 90 – 150 ^oCThis question was addressed to me in class test.Enquiry is from LBM-Applications topic in chapter Thermal Processes of Advanced Machining |
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Answer» Right choice is (C) 15 – 90 ^oC |
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| 116. |
The hole size in direct drilling depend up on which of the factors below?(a) Input power(b) Focusing adjustments(c) Input power & Focusing adjustments(d) None of the mentionedI got this question in an interview.My doubt stems from LBM-Applications topic in section Thermal Processes of Advanced Machining |
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Answer» Right CHOICE is (c) Input power & Focusing adjustments |
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| 117. |
What happens to the Electro discharge machining process under unfavourable working conditions?(a) Will remain stable(b) Explosion may occur(c) Machining rate increases(d) Nothing happensThis question was addressed to me during a job interview.My doubt is from EDM-Process Control, Automation, Environmental Impact in chapter Thermal Processes of Advanced Machining |
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Answer» Correct choice is (B) Explosion may occur |
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| 118. |
What happens when the heat is diffused into bulk material?(a) Phase change occurs(b) Melting occurs(c) Vaporization may take place(d) All of the mentionedI had been asked this question in a national level competition.My enquiry is from LBM-Material Removal topic in division Thermal Processes of Advanced Machining |
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Answer» The correct option is (d) All of the mentioned |
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| 119. |
What are the values of hole diameters obtained using Wire electro discharge grinding?(a) 1 µm(b) 3 µm(c) 5 µm(d) 7 µmI got this question during an interview for a job.This interesting question is from EDM-Applications topic in chapter Thermal Processes of Advanced Machining |
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Answer» Correct CHOICE is (c) 5 µm |
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| 120. |
What happens to the machine capital cost in EDT when there is an increase in tool quantity?(a) Decreases(b) Increases(c) Remains same(d) None of the mentionedI had been asked this question by my college professor while I was bunking the class.The doubt is from EDM-Applications in portion Thermal Processes of Advanced Machining |
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Answer» The correct answer is (b) INCREASES |
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| 121. |
What are the spindle rotation speeds used in EDT?(a) 1 to 4 rpm(b) 10 to 40 rpm(c) 20 to 60 rpm(d) 30 to 90 rpmThis question was addressed to me during an online interview.I need to ask this question from EDM-Applications in division Thermal Processes of Advanced Machining |
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Answer» The correct answer is (b) 10 to 40 RPM |
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| 122. |
Which of the following materials can be machined using Electro discharge machining?(a) Heat resistant alloys(b) Super alloys(c) Carbides(d) All of the mentionedI have been asked this question in an online quiz.I'd like to ask this question from EDM-Applications in section Thermal Processes of Advanced Machining |
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Answer» Right answer is (d) All of the mentioned |
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| 123. |
Which methods below, are used for introducing the dielectric in machining gap?(a) Normal flow(b) Reverse flow(c) Jet flushing(d) All of the mentionedI have been asked this question in an online quiz.This intriguing question comes from EDM-Machining System in chapter Thermal Processes of Advanced Machining |
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Answer» Right OPTION is (d) All of the mentioned |
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| 124. |
Which components mentioned below are affected due to arcs?(a) Work piece(b) Tool(c) Work piece & Tool(d) None of the mentionedI got this question in unit test.My question comes from EDM-Mechanism of Material Removal in chapter Thermal Processes of Advanced Machining |
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Answer» Correct option is (C) WORK piece & Tool |
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| 125. |
Quality of hole produced by orbiting motion is _________ to that obtained by using stationary electrode.(a) Inferior(b) Superior(c) Lower(d) All of the mentionedThe question was asked at a job interview.I'm obligated to ask this question of EDM-Machining System topic in division Thermal Processes of Advanced Machining |
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Answer» The correct choice is (b) Superior |
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| 126. |
What happens when the electron current predominates in the discharge?(a) More anodic removal(b) More cathodic removal(c) Remains same(d) All of the mentionedThis question was addressed to me during an online exam.My question is from EDM-Mechanism of Material Removal topic in portion Thermal Processes of Advanced Machining |
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Answer» RIGHT choice is (a) More anodic removal Easy explanation: When electron current PREDOMINATES the electrical DISCHARGE, anodic MATERIAL removal is greater than cathodic material. |
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| 127. |
What are the disadvantages of PBM?(a) Large power supplies(b) Heat produced(c) Toxic fumes produced(d) All of the mentionedThis question was addressed to me by my school principal while I was bunking the class.My question comes from PBM in section Thermal Processes of Advanced Machining |
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Answer» Right answer is (d) All of the mentioned |
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| 128. |
How much thickness of cracks may arise beyond HAZ due to rapid cooling?(a) 1.6 mm(b) 2.6 mm(c) 3.6 mm(d) 4.6 mmThe question was posed to me in an interview for job.My question is based upon PBM in chapter Thermal Processes of Advanced Machining |
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Answer» Correct OPTION is (a) 1.6 mm |
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| 129. |
How are the production times for a material in electron beam machining?(a) Very small(b) Small(c) Moderate(d) LongI have been asked this question in an interview for internship.The origin of the question is EBM-Applications, Advantages and Disadvantages topic in chapter Thermal Processes of Advanced Machining |
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Answer» Right option is (d) Long |
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| 130. |
How much amount of tapers are occurred in Laser drilled holes?(a) No taper(b) Negligible amount of taper(c) Some amount(d) None of the mentionedThis question was posed to me in a job interview.Query is from LBM-Advantages and Limitations in chapter Thermal Processes of Advanced Machining |
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Answer» CORRECT answer is (C) Some amount Best explanation: TAPERS are generally occurred in the direct DRILLING of HOLES using Laser beam machining. |
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| 131. |
How are the machining times in Laser beam machining?(a) Very slow machining times(b) Slow machining times(c) Moderate machining times(d) Fast machining timesThis question was posed to me during an internship interview.The above asked question is from LBM-Advantages and Limitations in section Thermal Processes of Advanced Machining |
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Answer» The CORRECT OPTION is (d) FAST machining TIMES |
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| 132. |
What are the values of wavelengths of Excimer laser used in LBM?(a) 100 – 200 nm(b) 200 – 500 nm(c) 600 – 700 nm(d) 800 – 900 nmI have been asked this question during an online interview.This is a very interesting question from Laser Beam Machining-Introduction in portion Thermal Processes of Advanced Machining |
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Answer» Correct answer is (b) 200 – 500 nm |
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| 133. |
Which of the following are the properties of a laser?(a) Highly collimated(b) Monochromatic(c) Coherent light beam(d) All of the mentionedThe question was asked in my homework.This question is from Laser Beam Machining-Introduction in portion Thermal Processes of Advanced Machining |
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Answer» The correct option is (d) All of the mentioned |
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| 134. |
What is the wavelength value of neutral gas laser used in LBM?(a) 633 nm(b) 694 nm(c) 856 nm(d) 1064 nmI had been asked this question during an interview.Query is from Laser Beam Machining-Introduction topic in portion Thermal Processes of Advanced Machining |
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Answer» Correct option is (a) 633 nm |
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| 135. |
What are the values of current amplitudes used in EDT?(a) 0.2 to 1 A(b) 2 to 10 A(c) 20 to 100 A(d) 40 to 200 AI have been asked this question by my school teacher while I was bunking the class.This intriguing question comes from EDM-Applications topic in division Thermal Processes of Advanced Machining |
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Answer» The correct choice is (B) 2 to 10 A |
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| 136. |
Manufacturing of tool electrode undergoes which of the following processes?(a) Milling(b) Turning(c) Finishing(d) All of the mentionedI had been asked this question by my school teacher while I was bunking the class.This interesting question is from EDM-Process Control, Automation, Environmental Impact in section Thermal Processes of Advanced Machining |
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Answer» CORRECT OPTION is (d) All of the mentioned Best EXPLANATION: The tool electrode MANUFACTURING used in EDM has to undergo the basic production processes such as milling, turning and finishing. |
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| 137. |
While machining insulating ceramic materials using EDM, where is the sheet metal placed?(a) Over material(b) Below material(c) Under material(d) None of the mentionedI had been asked this question in a job interview.I'm obligated to ask this question of EDM-Applications in portion Thermal Processes of Advanced Machining |
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Answer» RIGHT choice is (a) Over MATERIAL Easy EXPLANATION: SHEET metal is placed over the material in machining of insulating materials using EDM. |
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| 138. |
Which of the following industries use wire EDM for different applications?(a) Chemical industry(b) Aerospace industry(c) Automobile industry(d) All of the mentionedThis question was posed to me in a job interview.The doubt is from EDM-Applications topic in chapter Thermal Processes of Advanced Machining |
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Answer» The correct option is (d) All of the mentioned |
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| 139. |
Which motion of tool is used for machining spherical surfaces in Electro discharge machining?(a) Oscillatory(b) Vibratory(c) Rotary(d) All of the mentionedI have been asked this question in class test.Query is from EDM-Applications topic in division Thermal Processes of Advanced Machining |
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Answer» CORRECT choice is (c) ROTARY The explanation is: The rotary motion TOOL is USED for MACHINING spherical surfaces of conducting ceramic materials in EDM. |
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| 140. |
Copper has _________ Electro discharge machining wear and _________ conductivity.(a) Good, better(b) Good, worse(c) Bad, better(d) Bad, worseI got this question in exam.Origin of the question is EDM-Machining System in portion Thermal Processes of Advanced Machining |
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Answer» CORRECT option is (a) Good, better For explanation: Cu is the metal which has better CONDUCTIVITY and good ELECTRO discharge machining WEAR. |
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| 141. |
What are the surface roughness values obtained while machining spherical surfaces using Electro discharge machining?(a) |
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Answer» Correct choice is (a) <0.1 µm |
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| 142. |
Which of the following materials are used as electrodes in EDM?(a) Graphite(b) Copper(c) Brass(d) All of the mentionedThe question was asked in final exam.This interesting question is from EDM-Machining System in portion Thermal Processes of Advanced Machining |
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Answer» The correct answer is (d) All of the mentioned |
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| 143. |
The layer formed when unexpelled molten metal solidifies is known as _______________(a) Reabsorbed layer(b) Recast layer(c) Unevaporated layer(d) Condensed layerThe question was posed to me in quiz.This interesting question is from EDM-Mechanism of Material Removal topic in division Thermal Processes of Advanced Machining |
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Answer» The correct option is (B) Recast LAYER |
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| 144. |
What is the value of order of frequency applied between the two electrodes in EDM?(a) 1 kHz(b) 3 kHz(c) 5 kHz(d) 7 kHzThe question was posed to me during an interview.The query is from EDM-Mechanism of Material Removal topic in portion Thermal Processes of Advanced Machining |
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Answer» Correct choice is (c) 5 kHz |
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| 145. |
What are the values of pressure of the plasma in EDM?(a) Up to 2 atm(b) Up to 20 atm(c) Up to 200 atm(d) Up to 2000 atmThis question was posed to me during an internship interview.My question is taken from EDM-Mechanism of Material Removal topic in division Thermal Processes of Advanced Machining |
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Answer» RIGHT answer is (c) Up to 200 atm The BEST EXPLANATION: Pressure on the plasma CHANNEL rises to values as high as 200 atm when dielectric evaporates. |
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| 146. |
The slope of the side walls depends on which of the following factors?(a) Voltage supply(b) Angle of incidence(c) Flux(d) Current densityI have been asked this question by my college director while I was bunking the class.I'm obligated to ask this question of IBM-Surface effects and Applications topic in chapter Thermal Processes of Advanced Machining |
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Answer» Correct CHOICE is (b) Angle of incidence |
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| 147. |
What are the accuracy levels that are obtained by using IBM?(a) ± 1.0%(b) ± 2.0%(c) ± 3.0%(d) ± 4.0%This question was posed to me in an internship interview.I would like to ask this question from IBM-Surface effects and Applications topic in portion Thermal Processes of Advanced Machining |
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Answer» Right ANSWER is (a) ± 1.0% |
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| 148. |
What is the maximum thickness of the walls of tube machined using plasma arc?(a) 10 mm(b) 30 mm(c) 50 mm(d) 70 mmI got this question in examination.My query is from PBM topic in chapter Thermal Processes of Advanced Machining |
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Answer» The correct answer is (c) 50 MM |
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| 149. |
What is the value of specific energy used in Plasma beam machining process?(a) 100 W/(cm^3-min)(b) 200 W/(cm^3-min)(c) 300 W/(cm^3-min)(d) 400 W/(cm^3-min)This question was addressed to me at a job interview.I'd like to ask this question from Plasma Beam Machining-Introduction And Machining system in portion Thermal Processes of Advanced Machining |
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Answer» Correct CHOICE is (a) 100 W/(cm^3-min) |
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| 150. |
What is the value of velocity of plasma jet in Plasma beam machining?(a) 100 m/sec(b) 300 m/sec(c) 400 m/sec(d) 500 m/secThe question was posed to me during an interview for a job.This key question is from Plasma Beam Machining-Introduction And Machining system topic in division Thermal Processes of Advanced Machining |
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Answer» Correct ANSWER is (d) 500 m/sec |
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