Unconventional Machining Processes ( Manufacturing Engineering – I ) MCQs – Mechanical Engineering MCQs
Latest Mechanical Engineering MCQs
By practicing these MCQs of Unconventional Machining Processes ( Manufacturing Engineering – I ) MCQs – Latest Competitive MCQs , an individual for exams performs better than before. This post comprising of objective questions and answers related to “ Unconventional Machining Processes ( Manufacturing Engineering – I ) Mcqs “. As wise people believe “Perfect Practice make a Man Perfect”. It is therefore practice these mcqs of Mechanical Engineering to approach the success. Tab this page to check ” Unconventional Machining Processes ( Manufacturing Engineering – I )” for the preparation of competitive mcqs, FPSC mcqs, PPSC mcqs, SPSC mcqs, KPPSC mcqs, AJKPSC mcqs, BPSC mcqs, NTS mcqs, PTS mcqs, OTS mcqs, Atomic Energy mcqs, Pak Army mcqs, Pak Navy mcqs, CTS mcqs, ETEA mcqs and others.
Mechanical Engineering MCQs – Unconventional Machining Processes ( Manufacturing Engineering – I ) MCQs
The most occurred mcqs of ( ) in past papers. Past papers of Unconventional Machining Processes ( Manufacturing Engineering – I ) Mcqs. Past papers of Unconventional Machining Processes ( Manufacturing Engineering – I ) Mcqs . Mcqs are the necessary part of any competitive / job related exams. The Mcqs having specific numbers in any written test. It is therefore everyone have to learn / remember the related Unconventional Machining Processes ( Manufacturing Engineering – I ) Mcqs. The Important series of Unconventional Machining Processes ( Manufacturing Engineering – I ) Mcqs are given below:
Electric Discharge Machining
1. Which of the following machine uses non conventional machining technique for metal removal?
a) Grinding machine
b) Milling machine
c) Electric discharge machine
d) None of the mentioned
Answer: c
Explanation: Electronic discharge machine is a non conventional machining technique for metal removal.
2. Which of the following material cannot be machined using electronic discharge machine?
a) Iron
b) Aluminum
c) Copper
d) Wood
Answer: d
Explanation: Wood is a bad conductor of electricity and hence cannot be machined using electronic discharge machine.
3. Which of the following material can be machined using electronic discharge machine?
a) Iron
b) Rubber
c) Plastic
d) Wood
Answer: a
Explanation: Iron is a good conductor of electricity and hence can be machined using electronic discharge machine.
4. Which of the following EDM machine is used for cutting shapes cut out of a flat sheet or plate of metal?
a) Wire EDM
b) Sinker EDM
c) Wire and Sinker EDM both
d) None of the mentioned
Answer: a
Explanation: Wire EDM used for cutting shapes cut out of flat sheet or plate of metal. It is an unconventional process of machining.
5. Which of the following EDM machine is used for die cast tooling?
a) Wire EDM
b) Sinker EDM
c) Wire and Sinker EDM both
d) None of the mentioned
Answer: b
Explanation: Sinker EDM is used for die cast tooling. It is an unconventional process of machining.
6. Dielectric medium in EDM is used for
a) Flushing away the debris
b) To make the medium conducting
c) To decrease the material removal rate
d) None of the mentioned
Answer: a
Explanation: Dielectric in EDM is used for flushing away the debris generated during the process of machining, which may slow down the material removal rate if not removed instantly.
7. Material removal rate in EDM increases with
a) Increase in melting point of work piece
b) Increase in Current
c) Decrease in current
d) None of the mentioned
Answer: b
Explanation: MRR is directly proportional to the current.
8. Material removal rate in EDM increases with
a) Increase in melting point of work piece
b) Decrease in Current
c) Decrease in melting point of work piece
d) None of the mentioned
Answer: c
Explanation: MRR is inversely proportional to a melting point of work piece.
9. For maximum power delivery using resistance capacitance relaxation circuit in EDM, discharge voltage should ___ % of the supply voltage?
a) 80
b) 23
c) 65
d) 72
Answer: d
Explanation: Find optimum value using L-C circuits.
10. In an EDM machine, metal removal rate is 1.937 cubic mm / min. If total amount of material to removed is 600 cubic mm. Time required in min will be
a) 100
b) 200
c) 309
d) 402
Answer: c
Explanation: Time required= (Total material to be removed/material removal rate).
Electrochemical Machining
1. Which of the following is un-conventional machining process?
a) Grinding
b) Milling
c) Turning
d) Electro chemical machining
Answer: d
Explanation: Electro chemical machining is an un-conventional machining process used for large material removal from the surface using electricity generated due to chemical reactions.
2. Which of the following is conventional machining process?
a) Electro chemical machining
b) Milling
c) Electron discharge machining
d) None of the mentioned
Answer: b
Explanation: Milling is a conventional machining process used for material removal from the surface.
3. In ECM, heavy electrical sparks are created.
a) True
b) False
Answer: b
Explanation: Sparks are generated in EDM, by using high voltage current, for proper erosion of material.
4. In ECM, tool does not touch the work piece.
a) True
b) False
Answer: a
Explanation: Tool is very near to work piece but does not touch it in ECM.
5. Which of the following is correct about ECM?
a) Erosion of metal takes place as a reverse process of electroplating
b) Thermal stresses are induced
c) Mechanical stresses are induced
d) None of the mentioned
Answer: a
Explanation: In ECM, erosion of metal takes place as reverse process of electroplating.
6. Which of the following material cannot be machined using electro chemical machining?
a) Iron
b) Aluminum
c) Copper
d) Wood
Answer: d
Explanation: Wood is a bad conductor of electricity and hence cannot be machined using electro chemical machining.
7. Which of the following material can be machined using electro chemical machining?
a) Iron
b) Rubber
c) Plastic
d) Wood
Answer: a
Explanation: Iron is a good conductor of electricity and hence can be machined using electro chemical machining.
8. Electrode gap in electro chemical machining is generally ranged from
a) 0.5 mm to 0.9 mm
b) 1.1 mm to 1.2 mm
c) 0.1 mm to 0.2 mm
d) 3.1 mm to 4.2 mm
Answer: c
Explanation: Electrode gap in electro chemical machining is generally ranged from 0.1 mm to 0.2 mm.
Grinding Surface Finishing Operations MCQs
9. Electrolytes used in ECM must posses
a) Low electrical conductivity
b) Low chemical stability
c) High electrical conductivity
d) None of the mentioned
Answer: c
Explanation: Electrolytes used in ECM must have high electrical conductivity.
10. Which of the following is not a function of electrolyte in ECM?
a) It completes the circuit
b) It helps in electrochemical reaction
c) It carries away heat and waste product
d) It provide non reactive environment
Answer: d
Explanation: Electrolyte provides reactive environment for chemical reactions to takes place.
Laser Beam Machining
1. LASER stands for
a) Light amplification by stimulated emission of radiation
b) Light amplification by stimulated erosion of reaction
c) Light amplification by stimulated erosion of radiation
d) Light amplification by stimulated emission of reaction
Answer: a
Explanation: LASER stands for light amplification by stimulated emission of radiation. LASER have a high amount of energy, which can be used to generate heat.
2. Ruby laser is most efficient when
a) Kept cold
b) Kept hot
c) Kept at normal temperature
d) None of the mentioned
Answer: a
Explanation: Ruby laser is most efficient when it is kept cold. Ruby laser is used to produce a LASER. It generally uses chromium ions to produce LASER.
3. Time of machining in the laser beam machining process increases with
a) Decrease in power supply
b) Decrease in laser beam spot diameter
c) Increase in cutting speed
d) None of the mentioned
Answer: b
Explanation: Time of machining in the laser beam machining process is directly proportional to laser beam spot diameter. Larger the diameter, larger will be the HAZ.
4. Laser beam machining process can be used for
a) Conductors
b) Insulators
c) Metals
d) All of the mentioned
Answer: d
Explanation: Laser beam machining is more versatile and can be used for the metal as well as non metal. It does not require vacuum environment.
5. In laser beam machining process, as compared to other unconventional machining processes, heat affected zone is
a) Larger
b) Smaller
c) Not present
d) None of the mentioned
Answer: b
Explanation: In laser beam machining process heat affected zone have smaller area in comparison with other unconventional machining processes. It does not require vacuum environment.
6. Which of the following is an unconventional process of machining?
a) Turning
b) Milling
c) Drilling
d) Laser beam machining process
Answer: d
Explanation: Laser beam machining is an unconventional process of machining. It does not require vacuum environment.
7. Which of the following is a conventional process of machining?
a) Electro chemical machining
b) Electron beam machining
c) Drilling
d) Laser beam machining process
Answer: d
Explanation: Drilling is a conventional process of machining. Laser beam machining is an unconventional process of machining.
8. For machining of plastic material which of the unconventional process can be used effectively?
a) Electro chemical machining
b) Electron beam machining
c) Laser beam machining process
d) None of the mentioned
Answer: c
Explanation: Laser beam machining is more versatile and can be used for metal as well as non metal. In laser beam machining process heat affected zone have smaller area in comparison with other unconventional machining processes.
9. Time of cutting in laser beam machining process increases
a) With decrease in cutting speed
b) With Increase in Cutting speed
c) With increase in power
d) None of the mentioned
Answer: a
Explanation: Time of cutting in the laser beam machining process increases with a decrease in cutting speed.
10. In laser beam machining process lens is used to
a) Deflect laser beams
b) Diverge laser beams
c) Converge laser beams
d) None of the mentioned
Answer: c
Explanation: Lens is used to converge a laser beam on a very small area.
Ultrasonic Machining
1. Which of the following is an unconventional process of machining?
a) Milling
b) USM
c) Drilling
d) None of the mentioned
Answer: b
Explanation: USM stands for ultrasonic machining process and it is an unconventional process of machining.
2. Ultrasonic machining process can be used for
a) Conductors
b) Insulators
c) Metals
d) All of the mentioned
Answer: d
Explanation: Ultrasonic machining is more versatile and can be used for the metal as well as non metal.
3. Which of the following is a conventional process of machining?
a) Electro chemical machining
b) Electron beam machining
c) Ultrasonic machining
d) None of the mentioned
Answer: d
Explanation: All of the mentioned are unconventional process of machining.
4. For machining of plastic material which of the unconventional process can be used effectively?
a) Electro chemical machining
b) Electron beam machining
c) Ultrasonic machining
d) None of the mentioned
Answer: c
Explanation: Ultrasonic machining is more versatile and can be used for the metal as well as non metal.
5. Material removal rate in USM increases with
a) Decrease in volume of work material per impact
b) Increase in volume of work material per impact
c) Decrease in frequency
d) Decrease in number of particle making impact per cycle
Answer: b
Explanation: Material removal rate in USM is proportional to the volume of work material per impact.
6. Material removal rate in USM increases with
a) Decrease in volume of work material per impact
b) Decrease in volume of work material per impact
c) Decrease in frequency
d) Increase in number of particle making impact per cycle
Answer: d
Explanation: Material removal rate in USM is proportional to the number of particle making impact per cycle.
7. Material removal rate in USM increases with
a) Decrease in volume of work material per impact
b) Decrease in volume of work material per impact
c) Increases in frequency
d) Decreases in the number of particle making impact per cycle
Answer: c
Explanation: Material removal rate in Ultrasonic machining is proportional to frequency.
8. Element of machine which is used to convert high frequency electrical impulse into mechanical vibration in USM is known as
a) Tool
b) Feeding unit
c) Transducer
d) None of the mentioned
Answer: c
Explanation: Transducer is a device which is used to convert one form of energy to other.
9. Which of the following elements of USM is used to apply working force during machining operation?
a) Tool
b) Feeding unit
c) Transducer
d) None of the mentioned
Answer: b
Explanation: Feeding unit is used to apply working force during a machining operation.
10. Material removal rate in USM increases with
a) Decrease in amplitude
b) Decrease in grain size of abrasives
c) Decrease in frequency
d) Increase in amplitude
Answer: d
Explanation: Material removal rate in ultrasonic machining is proportional to amplitude.
Abrasive jet Machining
1. Which of the following is an unconventional process of machining?
a) Milling
b) AJM
c) Drilling
d) None of the mentioned
Answer: b
Explanation: AJM stands for abrasive jet machining and it is an unconventional process of machining.
2. Abrasive jet machining process can be used for
a) Conductors
b) Insulators
c) Metals
d) All of the mentioned
Answer: d
Explanation: Abrasive jet machining is more versatile and can be used for the metal as well as non metal.
3. Which of the following is a conventional process of machining?
a) Electro chemical machining
b) Electron beam machining
c) Drilling
d) Abrasive jet machining
Answer: c
Explanation: Drilling is a conventional process of machining.
4. For machining of plastic material which of the unconventional process can be used effectively?
a) Electro chemical machining
b) Electron beam machining
c) Abrasive jet machining
d) None of the mentioned
Answer: c
Explanation: Abrasive jet machining is more versatile and can be used for the metal as well as non metal.
5. Metal removal rate in abrasive jet machining increases with
a) Increase in abrasive flow rate
b) Decrease in abrasive flow rate
c) Decrease in grain size of abrasives
d) Increase in grain size of abrasives
Answer: a
Explanation: Metal removal rate in abrasive jet machining increases with increase in abrasive flow rate. But after certain limit, erosion in nozzle become larger and velocity of grains become smaller.
6. Metal removal rate in abrasive jet machining increases with
a) Increase in abrasive flow rate but decreases beyond a certain limit
b) Decrease in abrasive flow rate
c) Increase in grain size of abrasives
d) None of the mentioned
Answer: a
Explanation: MRR is directly proportional to grain size.
7. Metal removal rate in abrasive jet machining increases with
a) Increase in standoff distance but decreases beyond a certain limit
b) Decrease in abrasive flow rate
c) Decrease in grain size in grain size of abrasives
d) None of the mentioned
Answer: a
Explanation: MRR is directly proportional to standoff distance up to certain limit. After certain limit, kinetic energy of abrasives starts decreasing.
8. Metal removal rate in abrasive jet machining increases with
a) Increase in gas pressure
b) Decrease in abrasive flow rate
c) Decrease in gas pressure
d) None of the mentioned
Answer: a
Explanation: MRR is directly proportional to gas pressure.
9. Mixing ratio in abrasive jet machining is defined as a ratio of
a) Mass flow rate of abrasive to mass flow rate of gas
b) Mass flow rate of gas to mass flow rate of abrasive
c) Velocity of gas to velocity of abrasive
d) None of the mentioned
Answer: a
Explanation: Mixing ratio in abrasive jet machining is defined as a ratio of mass flow rate of abrasive to mass flow rate of gas.
10. High abrasive flow rate decreases the life of nozzle in the abrasive machining process.
a) True
b) False
Answer: a
Explanation: Due to high velocity, erosion starts in a nozzle which further decreases its life.
Other Unconventional Machining
1. Which of the following is an unconventional process of machining?
a) Milling
b) WJM
c) Drilling
d) None of the mentioned
Answer: b
Explanation: WJM stands for water jet machining and it is an unconventional process of machining. Water jet machining process is more versatile and can be used for the metal as well as non metal.
2. Water jet machining process can be used for
a) Conductors
b) Insulators
c) Metals
d) All of the mentioned
Answer: d
Explanation: WJM stands for water jet machining and it is an unconventional process of machining. Water jet machining process is more versatile and can be used for the metal as well as non metal.
3. Which of the following is a conventional process of machining?
a) Electro chemical machining
b) Electron beam machining
c) Water jet machining process
d) None of the mentioned
Answer: d
Explanation: All of the mentioned are unconventional machining process. Water jet machining process is more versatile and can be used for the metal as well as non metal.
4. For machining of plastic material which of the unconventional process can be used effectively?
a) Electro chemical machining
b) Electron beam machining
c) Water jet machining process
d) None of the mentioned
Answer: c
Explanation: WJM stands for water jet machining and it is an unconventional process of machining. Water jet machining process is more versatile and can be used for the metal as well as non metal.
5. Decrease in ratio of work hardness to tool hardness decreases material removal rate.
a) True
b) False
Answer: b
Explanation: Ratio of work hardness to tool hardness is inversely proportional to material removal rate.
6. Decrease in viscosity of fluid used decreases material removal rate.
a) True
b) False
Answer: b
Explanation: Viscosity is inversely proportional to the material removal rate. With increase in viscosity, material removal rate decreases.
7. Material removal rate decreases with
a) Increase in amplitude
b) Decrease in grain size of abrasives
c) Increase in frequency
d) Increase in amplitude
Answer: d
Explanation: Material removal rate in USM is proportional to a grain size of abrasives used. No residual stresses are left in ultrasonic machining.
8. Which of the following is correct about USM?
a) Surface finish is bad
b) High cost
c) Not efficient for brittle material
d) None of the mentioned
Answer: d
Explanation: All of the mentioned are not correct about ultrasonic machining.
9. Which of the following is correct about USM?
a) Surface finish is bad
b) High cost
c) Not efficient for brittle material
d) No residual stress on work piece
Answer: d
Explanation: No residual stresses are left in ultrasonic machining. Material removal rate in USM is proportional to grain size of abrasives used.
10. Which of the following is not correct about USM?
a) Low cost
b) Process is very loud noise making
c) Good surface finish
d) None of the mentioned
Answer: b
Explanation: Ultrasonic machining is a very silent process. Material removal rate in USM is proportional to grain size of abrasives used.