McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
| 601. |
How much amount of energy is consumed in Electro chemical machining? |
| A. | very small |
| B. | small |
| C. | medium |
| D. | large |
| Answer» D. large | |
| Explanation: very huge amount of energy is required for ecm, which is nearly 100 times required for turning or drilling of steel. | |
| 602. |
How are material removal rates of ECM, when compared to that of conventional methods? |
| A. | slower |
| B. | faster |
| C. | same |
| D. | none of the mentioned |
| Answer» A. slower | |
| Explanation: in ecm, rates of material removal are slow compared to conventional methods. | |
| 603. |
State whether the following statement is true or false regarding the limitations of ECM. “In ECM, cleaning and oiling of work piece need not be done after machining.” |
| A. | true |
| B. | false |
| Answer» B. false | |
| Explanation: work piece needs to be cleaned and oiled just after the machining is done. | |
| 604. |
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 mentioned |
| Answer» D. all of the mentioned | |
| Explanation: removal of hydrogen, handling and containing the electrolyte and energy consumption are some of the limitations of ecm. | |
| 605. |
State whether the following statement is true or false regarding the limitations of ECM. “In electrochemical machining, duplicating the tool is easier.” |
| A. | true |
| B. | false |
| Answer» B. false | |
| Explanation: duplication of tool is difficult in ecm, since it has side machining effects. | |
| 606. |
Electro chemical machining process cannot produce which of the following mentioned below? |
| A. | drilled holes |
| B. | deburred edges |
| C. | sharp edges |
| D. | all of the mentioned |
| Answer» C. sharp edges | |
| Explanation: electro chemical machining cannot produce sharp internal or external edges. | |
| 607. |
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 force |
| Answer» A. large | |
| Explanation: electrolyte pumping through the narrow gaps gives rise to a large amount of forces on tool and work pieces | |
| 608. |
In this type of machining, machining forces are controlled by which of the following fields? |
| A. | magnetic field |
| B. | electric field |
| C. | radiative field |
| D. | none of the mentioned |
| Answer» A. magnetic field | |
| Explanation: in this machining, the magnetic field controls all the major forces of machining. | |
| 609. |
Which of the following type of tools, are required for magnetic field assisted polishing? |
| A. | rigid tools |
| B. | expensive tools |
| C. | magnetic tools |
| D. | ultra precession tools |
| Answer» C. magnetic tools | |
| Explanation: magnetic field assisted polishing requires only magnetic machining elements, for the purpose of machining. | |
| 610. |
Which of the following is not a magnetic field assisted machining process? |
| A. | electro-plating process |
| B. | magnetic abrasive finishing |
| C. | magnetic float polishing |
| D. | all of the mentioned |
| Answer» A. electro-plating process | |
| Explanation: there are only two types of magnetic field assisted polishing: magnetic abrasive machining and magnetic float polishing. | |
| 611. |
In the advanced machining processes, what is the full form of MAF? |
| A. | magnet automated finishing |
| B. | magnetic abrasive finishing |
| C. | magnet assisted floating |
| D. | magnetic association for floating |
| Answer» B. magnetic abrasive finishing | |
| Explanation: in advanced machining processes, full form of maf is magnetic abrasive finishing. | |
| 612. |
In Magnetic abrasive finishing, which of the following particles do not contribute to the material removal? |
| A. | abrasive particles |
| B. | magnetic particles |
| C. | non-magnetic particles |
| D. | all of the mentioned |
| Answer» C. non-magnetic particles | |
| Explanation: material is removed by colloidal dispersion of the magnetic particles in abrasive particles. | |
| 613. |
Which of the following motions are opted, in order to carry on with the Magnetic abrasive finishing? |
| A. | rotary motion |
| B. | oscillatory motion |
| C. | vibratory motion |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| Explanation: all the motions mentioned above, are needed for machining parts in maf. | |
| 614. |
Magnetic Abrasive finishing is used for which of the following application/s? |
| A. | surface finishing |
| B. | cutting |
| C. | drilling |
| D. | boring |
| Answer» A. surface finishing | |
| Explanation: magnetic abrasive finishing is a process, which is opted for finishing of parts that are already machined on the other machines. | |
| 615. |
Which is the place, where Magnetic field assisted polishing was invented? |
| A. | the united states of america |
| B. | the united arab emirates |
| C. | union of soviet socialist republics |
| D. | japan |
| Answer» A. the united states of america | |
| Explanation: magnetic field assisted polishing was invented in the united states of america. | |
| 616. |
Which of the following processes cannot be machined using Magnetic abrasive finishing? |
| A. | surface finishing |
| B. | surface polishing |
| C. | hole drilling |
| D. | none of the mentioned |
| Answer» C. hole drilling | |
| Explanation: holes drilling is one of the processes that cannot be done using magnetic abrasive finishing | |
| 617. |
Which of the following components, come under machining system of Magnetic Abrasive finishing? |
| A. | rotatory spindle |
| B. | oscillating magnets |
| C. | holding chuck |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| Explanation: the components, which are mentioned above come under machining system of magnetic abrasive finishing. | |
| 618. |
Which of the following materials can be machined using Magnetic Abrasive finishing? |
| A. | alloy steels |
| B. | ceramic materials |
| C. | iron materials |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| Explanation: magnetic abrasive finishing is a process which is used for different materials, magnetic and nonmagnetic. | |
| 619. |
State whether the following statement is true or false about Magnetic abrasive finishing. “Vibratory motion that is axial, is introduced in the magnetic field by the oscillation of magnetic poles.” |
| A. | true |
| B. | false |
| Answer» A. true | |
| Explanation: axially vibrating motion is required for machining in maf. | |
| 620. |
Which of the following material/s is/are used to hold the abrasives, in MAF? |
| A. | nonmagnetic materials |
| B. | ferro magnetic materials |
| C. | ceramic materials |
| D. | none of the mentioned |
| Answer» B. ferro magnetic materials | |
| Explanation: ferro magnetic materials hold the abrasives in order to remove material through finishing. | |
| 621. |
What is the other name of ferromagnetic material used for holding the abrasives in MAF? |
| A. | magnetic abrasive conglomerate |
| B. | magnetic abrasive holder |
| C. | magnetic abrasive container |
| D. | magnetic abrasive ampule |
| Answer» A. magnetic abrasive conglomerate | |
| Explanation: ferro magnetic material is also called as magnetic abrasive conglomerate. | |
| 622. |
What are the sizes magnetic abrasive conglomerates required in the machining system of MAF? |
| A. | 1 – 10 microns |
| B. | 20 – 50 microns |
| C. | 50 – 100 microns |
| D. | 100 – 200 microns |
| Answer» C. 50 – 100 microns | |
| Explanation: the sizes of magnetic abrasive conglomerates range between 50 – 100 microns. | |
| 623. |
What are the size ranges of the abrasives used in Magnetic abrasive finishing? |
| A. | 0.1 to 1 microns |
| B. | 1 to 10 microns |
| C. | 10 to 100 microns |
| D. | 100 to 1000 microns |
| Answer» B. 1 to 10 microns | |
| Explanation: the size of abrasives used for finishing range between 1 to 10 microns. | |
| 624. |
Which of the following are commonly used magnetic materials in finishing process? |
| A. | iron and iron oxides |
| B. | nickel and cobalt |
| C. | steel and stainless steel |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| Explanation: all the materials mentioned above, are commonly used magnetic materials. | |
| 625. |
Which of the following are commonly used abrasive materials in finishing process of MAF? |
| A. | silicon carbide |
| B. | aluminium oxide |
| C. | cubic boron nitride |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| Explanation: all the materials mentioned above, are used as abrasives in magnetic abrasive finishing process. | |
| 626. |
Which of the following materials combine to form the magnetic abrasive brush in MAF? |
| A. | work piece |
| B. | magnetic and abrasive particles |
| C. | magnets |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| Explanation: all the materials mentioned above, combine to form the magnetic abrasive brush. | |
| 627. |
In order to achieve uniform circulation of abrasives, the magnetic abrasives are undergone through which of the following? |
| A. | stirring |
| B. | oscillation |
| C. | vibration |
| D. | all of the mentioned |
| Answer» A. stirring | |
| Explanation: to achieve uniform circulation of abrasives, the abrasives are undergone thorough stirring. | |
| 628. |
Magnetic lines of force flows on which part of the work piece material? |
| A. | through the work piece |
| B. | over the surface |
| C. | above the work piece |
| D. | below the work piece |
| Answer» A. through the work piece | |
| Explanation: magnetic lines of force flow through the work piece. | |
| 629. |
What is the limit of the roller speed used in MAF? |
| A. | up to 0.5 m/s |
| B. | up to 1.3 m/s |
| C. | up to 2.6 m/s |
| D. | up to 3.3 m/s |
| Answer» B. up to 1.3 m/s | |
| Explanation: roller speed used can be up to 1.3 m/s. | |
| 630. |
In which direction, oscillatory motion of magnets are carried out? |
| A. | axial to work piece |
| B. | perpendicular to work piece |
| C. | inclined to work piece |
| D. | none of the mentioned |
| Answer» A. axial to work piece | |
| Explanation: axial oscillation motion of magnets takes with respect to work piece. | |
| 631. |
Which of the following surface defects are removed using Magnetic abrasive finishing? |
| A. | scratches |
| B. | hard spots |
| C. | lay lines and tool marks |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| Explanation: all the surface defects mentioned above, can be removed using magnetic abrasive finishing. | |
| 632. |
What is the value of the limited depth to which form errors, tapers, looping can be corrected? |
| A. | 10 microns |
| B. | 20 microns |
| C. | 30 microns |
| D. | 40 microns |
| Answer» B. 20 microns | |
| Explanation: form errors, tapers, looping etc.., can be corrected up to a limited depth of 20 microns. | |
| 633. |
State whether the following statement is true or false about magnetic abrasive finishing. “Increasing the magnetic flux density raises the rate of material removal in finishing.” |
| A. | true |
| B. | false |
| Answer» A. true | |
| Explanation: in maf, as the magnetic flux density increases, material removal rate increases. | |
| 634. |
Which of the following factors, does material removal rate depend on? |
| A. | magnetic flux density |
| B. | working clearance |
| C. | work piece material |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| Explanation: all the factors mentioned above, are responsible for change in material removal rate. | |
| 635. |
Which of the following factors does not affect the magnetic abrasive conglomerates in MAF? |
| A. | abrasive type |
| B. | abrasive size |
| C. | work piece material |
| D. | volume fraction |
| Answer» C. work piece material | |
| Explanation: in magnetic abrasive finishing, work piece material has no effect on magnetic abrasive conglomerates. | |
| 636. |
State whether the following statement is true or false about Magnetic abrasive finishing. “Higher rates of material removal are obtained, with an increase in amplitude and frequency.” |
| A. | true |
| B. | false |
| Answer» A. true | |
| Explanation: as the amplitude and frequency increases, the rate of material removal increases | |
| 637. |
Which of the following applications where MAF is used? |
| A. | finishing of inner surfaces |
| B. | polishing of balls and rollers |
| C. | chamfering and deburring of gears |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| Explanation: all the applications mentioned above can be fulfilled using maf. | |
| 638. |
Diamond abrasives used for finishing operation results in which type of surface defects? |
| A. | deep pits |
| B. | surface scratches |
| C. | micro cracks |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| Explanation: all the defects mentioned above occur, when we use diamond abrasives for material removal. | |
| 639. |
Which of the following conditions is/are not suitable for finishing of ceramic balls? |
| A. | controlled force |
| B. | large abrasive sizes |
| C. | small abrasive sizes |
| D. | less harder abrasives |
| Answer» B. large abrasive sizes | |
| Explanation: for a better finish, controlled force, fine and less hard abrasives are required. | |
| 640. |
In MAF, ceramic balls and the bearing rollers are placed in between which components? |
| A. | abrasives and float |
| B. | drive shaft and float |
| C. | float and magnets |
| D. | magnets and abrasives |
| Answer» B. drive shaft and float | |
| Explanation: ceramic balls are placed in between drive shaft and float. | |
| 641. |
Polishing in Magnetic abrasive finishing is done, by which action of material removal? |
| A. | mechanical abrasion |
| B. | mechanical erosion |
| C. | chemical corrosion |
| D. | material vaporization |
| Answer» A. mechanical abrasion | |
| Explanation: abrasives are used for the polishing and finishing operations of the parts, in magnetic abrasive finishing. | |
| 642. |
For obtaining a better finish using Magnetic abrasive finishing, tubes are rotated at which speeds? |
| A. | very low |
| B. | low |
| C. | medium |
| D. | very high |
| Answer» D. very high | |
| Explanation: to obtain a better finish in magnetic abrasive finishing, tubes are rotated at very high speeds. | |
| 643. |
Which of the following is an advantage of MAF over Electrolytic finishing? |
| A. | disposing of electrolyte |
| B. | cost effective |
| C. | more flexible |
| D. | more accuracy |
| Answer» A. disposing of electrolyte | |
| Explanation: in maf, the problem of disposing electrolyte as in case of electrolytic finishing is not present. | |
| 644. |
State whether the following statement is true or false about Magnetic abrasive finishing. “Mirror finishing, removed burrs with lowering the accuracy of the shape are achieved by MAF.” |
| A. | true |
| B. | false |
| Answer» B. false | |
| Explanation: removed burrs without lowering the accuracy are obtained using maf. | |
| 645. |
What are the other applications where Magnetic abrasive finishing can be used? |
| A. | removal of oxide layers |
| B. | removal of protective coatings |
| C. | chamfering |
| D. | all of the mentioned |
| Answer» D. all of the mentioned | |
| Explanation: all the processes mentioned above can be done using magnetic abrasive finishing | |
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