MCQOPTIONS
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MCQOPTIONS
This section includes 815 Mcqs, each offering curated multiple-choice questions to sharpen your Production Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In ultrasonic machining, tool is made of |
| A. | Tungsten carbide |
| B. | Brass or copper |
| C. | Diamond |
| D. | Stainless steel |
| Answer» C. Diamond | |
| 2. |
Stellite preserves hardness up to a temperature of |
| A. | 350 C |
| B. | 500 C |
| C. | 900 C |
| D. | 1100 C |
| Answer» E. | |
| 3. |
A drill bit of 20 mm diameter rotating at 500 r.p.m. with a feed rate of 0.2 mm/revolution is used to drill a through hole in a mild steel plate 20 mm thickness. The depth of cut in this drilling operation is |
| A. | 0.2 mm |
| B. | 10 mm |
| C. | 20 mm |
| D. | 100 mm |
| Answer» D. 100 mm | |
| 4. |
Which of the following arc welding processes does not use consumable electrodes? |
| A. | GMAW |
| B. | GTAW |
| C. | Submerged Arc Welding |
| D. | None of these |
| Answer» C. Submerged Arc Welding | |
| 5. |
Two plates of the same metal having equal thickness are to be butt welded with electric arc. When the plate thickness changes, welding is achieved by |
| A. | Adjusting the current |
| B. | Adjusting the duration of current |
| C. | Changing the electrode size |
| D. | Changing the electrode coating |
| Answer» D. Changing the electrode coating | |
| 6. |
Which of the following statement is wrong about ultrasonic machining? |
| A. | It is best suited for machining hard and brittle materials. |
| B. | B. |
| C. | C. |
| D. | D. |
| Answer» D. D. | |
| 7. |
The operation in which oil is permeated into the pores of a powder metallurgy product is known as |
| A. | Mixing |
| B. | Sintering |
| C. | Impregnation |
| D. | Infiltration |
| Answer» D. Infiltration | |
| 8. |
The maximum possible draft in cold rolling of sheet increases with the |
| A. | Increase in coefficient of friction |
| B. | Decrease in coefficient of friction |
| C. | Decrease in roll radius |
| D. | Decrease in roll velocity |
| Answer» B. Decrease in coefficient of friction | |
| 9. |
A CNC vertical milling machine has to cut a straight slot of 10 mm width and 2 mm depth by a cutter of 10 mm diameter between points (0,0) and (100,100) on the XY plane (dimensions in mm). The feed rate used for milling is 50 mm/min, milling time for the slot (in seconds) is |
| A. | 120 |
| B. | 170 |
| C. | 180 |
| D. | 240 |
| Answer» C. 180 | |
| 10. |
A solid cylinder of diameter 100 mm and height 50 mm is forged between two frictionless flat dies to a height of 25 mm. The percentage change in diameter is |
| A. | 2.07 |
| B. | 20.7 |
| C. | 41.4 |
| Answer» E. | |
| 11. |
During normalizing process of steel, the specimen is heated |
| A. | Between the upper and lower critical temperature and cooled in still air. |
| B. | Above the upper critical temperature and cooled in furnace. |
| C. | Above the upper critical temperature and cooled in still air. |
| D. | Between the upper and lower critical temperature and cooled in furnace. |
| Answer» D. Between the upper and lower critical temperature and cooled in furnace. | |
| 12. |
In abrasive jet machining, as the distance between the nozzle tip and the work surface increases, the material removal rate |
| A. | Increases continuously |
| B. | Decreases continuously |
| C. | Decreases becomes stable and then increases |
| D. | Increases, becomes stable and then decreases |
| Answer» E. | |
| 13. |
The common welding error that occurs due to wrong speed, faulty preparation, and high / low current, improper electrode size is called? |
| A. | Distortion |
| B. | Warping |
| C. | Porous weld |
| D. | Poor fusion |
| Answer» E. | |
| 14. |
What is the type of welding defect caused due to shrinkage during solidification and by weld stresses called? |
| A. | Incomplete fusion |
| B. | Lamellar tearing |
| C. | Mismatch |
| D. | Shrinkage void |
| Answer» C. Mismatch | |
| 15. |
In DC arc welding, if leads are arranged in work as Negative pole of the welding arc and electrode as Positive pole of the welding arc, the arrangement is known as |
| A. | Fusion |
| B. | Reverse polarity |
| C. | C. |
| D. | D. |
| Answer» C. C. | |
| 16. |
What is the welding defect caused due to improper control and poor removal of slog between passes called? |
| A. | Mismatch |
| B. | Under fill |
| C. | Crack |
| D. | Porosity |
| Answer» C. Crack | |
| 17. |
Work speed of circular electrode of 220 mm diameter for carrying out seam welding at 4 welds per cm on 1.6 mm thick mild steel tube. Welding cycle consists of 3 cycles on and 2 cycles off Power supply is at 50 Hz. Calculate R.P.M. and energy requirement of the above circular electrodes assuming effective resistance between electrodes as 100 ohm. |
| A. | 2.17 rpm, 600 joules |
| B. | 6.8 rpm, 6 joules |
| C. | 5.03 rpm, 600 joules |
| D. | 22 rpm, 600 joules |
| Answer» B. 6.8 rpm, 6 joules | |
| 18. |
What is the method of brazing used to join relatively small assemblies made from materials that either do not oxidize at the brazing temperature or can be protected from oxidation with a flux? |
| A. | Torch brazing |
| B. | Dip brazing |
| C. | Resistance brazing |
| D. | Furnace brazing |
| Answer» B. Dip brazing | |
| 19. |
Calculate the weld per minute, work speed of circular electrode of 220 mm diameter for carrying out seam welding at 4 welds per cm on 1.6 mm thick mild steel tube. Welding cycle consists of 3 cycles on and 2 cycles off Power supply is at 50 Hz. |
| A. | 3000 welds/min, 75 mm/min |
| B. | 600 welds/min, 1500 mm/min |
| C. | 500 welds/min, 1250 mm/min |
| D. | 22 welds/min, 55 mm/min |
| Answer» C. 500 welds/min, 1250 mm/min | |
| 20. |
What type of fusion welding process is used for welding sheet metals of all engineering metals (except Cu, Ag) in automobile and air craft industries, pipe and tubing production? |
| A. | Thermit welding |
| B. | Electroslag welding |
| C. | Resistance welding |
| D. | Submerged arc Welding |
| Answer» D. Submerged arc Welding | |
| 21. |
When two main plates are kept in alignment butting each other and riveted with cover plate on both sides of the main plates with two rows of rivets in each main plate, the joint is known as _______ double cover butt joint. |
| A. | Single riveted |
| B. | Double riveted |
| C. | Both (A) and (B) |
| D. | None of these |
| Answer» C. Both (A) and (B) | |
| 22. |
Which one among the following welding processes uses non-consumable electrode? |
| A. | Gas metal arc welding |
| B. | Submerged arc welding |
| C. | Gas tungsten arc welding |
| D. | Flux coated arc welding |
| Answer» D. Flux coated arc welding | |
| 23. |
The common welding error that occurs due to shrinkage of weld metal, faulty clamping of parts, faulty penetration or overheating at joints is called? |
| A. | Distortion |
| B. | Warping |
| C. | Porous weld |
| D. | Poor fusion |
| Answer» C. Porous weld | |
| 24. |
In a particular type of welding, flux is prepared in the form of a coarse powder and granulated flux is spread over the joint. What is this type of welding process called? |
| A. | Electric arc welding |
| B. | Submerged arc welding |
| C. | MIG welding |
| D. | TIG welding |
| Answer» C. MIG welding | |
| 25. |
In a metal arc welding process, a gas metal arc welding with magnetized flux is used and can be done in all the positions i.e. flat position, vertical position or inclined position. |
| A. | Globular transfer |
| B. | Spray transfer |
| C. | GMAW practice |
| D. | Dip transfer |
| Answer» D. Dip transfer | |
| 26. |
If a gas metal arc process uses a low arc voltage and the arc is continuously interrupted as the molten electrode metal fills up the arc gap is known as |
| A. | ARC |
| B. | Short ARC |
| C. | ARC length |
| D. | ARC blow |
| Answer» C. ARC length | |
| 27. |
In Oxyacetylene gas welding, temperature at the inner cone of the flame is around |
| A. | 3500 C |
| B. | 3200 C |
| C. | 2900 C |
| D. | 2550 C |
| Answer» C. 2900 C | |
| 28. |
Two 1 mm thick steel sheets are to be spot welded at a current of 5000 A. Assuming effective resistance to be 200 m and current flow time of 0.2 second, heat generated during the process will be |
| A. | 0.2 Joule |
| B. | 1 Joule |
| C. | 5 Joule |
| D. | 1000 Joule |
| Answer» E. | |
| 29. |
In up-cut milling the work piece is fed |
| A. | Against the rotating cutter |
| B. | At angle of 60 to the cutter |
| C. | In the direction of the cutter |
| D. | At the right angle to the cutter |
| Answer» B. At angle of 60 to the cutter | |
| 30. |
What is the name of the device used in arc welding circuits for the purpose of modifying the rate of current change when the weld road is varied rapidly? |
| A. | Reactor |
| B. | Kerf |
| C. | Inductor |
| D. | Cone |
| Answer» D. Cone | |
| 31. |
A type of welding flows, which is the result of a perfect proportion and mixture of acetylene and oxygen and is used for fusion welding of steel and cast iron, is |
| A. | Carburizing flame |
| B. | Oxidizing flame |
| C. | Oxy-acetylene flame |
| D. | Neutral flame |
| Answer» E. | |
| 32. |
What is the type of shielding gas for GTAW (Gas Tungsten Arc Welding) used for carbon steels only called? |
| A. | Argon H |
| B. | Argon CO |
| C. | Argon Helium |
| D. | Helium |
| Answer» C. Argon Helium | |
| 33. |
While current is shut down in the welding circuit, what kind of voltage exists between the output terminals of the welding machine? |
| A. | GTAW |
| B. | Open air cut voltage |
| C. | Kerf |
| D. | Gouging |
| Answer» C. Kerf | |
| 34. |
The capacity of a material to be welded under the imposed fabrication conditions into a specific, suitably designed structure and to perform satisfactorily in the intended service is known as? |
| A. | Weldment |
| B. | Weld tab |
| C. | Weldability |
| D. | Tack weld |
| Answer» D. Tack weld | |
| 35. |
Shrinkage allowance on pattern is provided to compensate for shrinkage when |
| A. | The temperature of liquid metal drops from pouring to freezing temperature |
| B. | The metal changes from liquid to solid state at freezing temperature |
| C. | The temperature of solid phase drops from freezing to room temperature |
| D. | The temperature of metal drops from pouring to room temperature |
| Answer» D. The temperature of metal drops from pouring to room temperature | |
| 36. |
The primary purpose of a sprue in a casting mould is to |
| A. | Feed the casting at a rate consistent with the rate of solidification |
| B. | Act as a reservoir for molten metal |
| C. | Feed molten metal from the pouring basin to the gate |
| D. | Help feed the casting until all solidification takes place |
| Answer» D. Help feed the casting until all solidification takes place | |
| 37. |
Which one of the following is a solid state joining process? |
| A. | Gas tungsten arc welding |
| B. | Resistance spot welding |
| C. | Friction welding |
| D. | Submerged arc welding |
| Answer» D. Submerged arc welding | |
| 38. |
Hardness of green sand mould increases with |
| A. | Increase in moisture content beyond 6 percent |
| B. | Increase in permeability |
| C. | Decrease in permeability |
| D. | Increase in both moisture content and permeability |
| Answer» D. Increase in both moisture content and permeability | |
| 39. |
In a gating system, the ratio 1: 2: 4 represents |
| A. | Sprue base area: runner area: ingate area |
| B. | Pouring basin area: ingate area: runner area |
| C. | Sprue base area: ingate area: casting area |
| D. | Runner area: ingate area: casting area |
| Answer» B. Pouring basin area: ingate area: runner area | |
| 40. |
Green sand mould indicates that |
| A. | Polymeric mould has been cured |
| B. | Mould has been totally dried |
| C. | Mould is green in colour |
| D. | Mould contains moisture |
| Answer» E. | |
| 41. |
Allowance in limits and fits refers to |
| A. | Maximum clearance between shaft and hole |
| B. | Minimum clearance between shaft and hole |
| C. | Difference between maximum and minimum sizes of hole |
| D. | Difference between maximum and minimum sizes of shaft |
| Answer» B. Minimum clearance between shaft and hole | |
| 42. |
In ECM, the material removal is due to |
| A. | Corrosion |
| B. | Erosion |
| C. | Fusion |
| D. | Ion displacement |
| Answer» E. | |
| 43. |
What is the type of welding defect is caused due to stresses on heating and cooling called? |
| A. | Incomplete penetration |
| B. | Shrinkage void |
| C. | Slag Entrapment (Inclusions) |
| D. | D. |
| Answer» C. Slag Entrapment (Inclusions) | |
| 44. |
Cold working of steel is defined as working |
| A. | At its recrystallisation temperature |
| B. | Above its recrystallisation temperature |
| C. | Below its recrystallisation temperature |
| D. | At two thirds of the melting temperature of the metal |
| Answer» D. At two thirds of the melting temperature of the metal | |
| 45. |
The percentage of carbon in gray cast iron is in the range of |
| A. | 0.25 to 0.75 percent |
| B. | 1.25 to 1.75 percent |
| C. | 3 to 4 percent |
| D. | 8 to 10 percent |
| Answer» D. 8 to 10 percent | |
| 46. |
Quality screw threads are produced by |
| A. | Thread milling |
| B. | Thread chasing |
| C. | Thread cutting with single point tool |
| D. | Thread casting |
| Answer» E. | |
| 47. |
In order to have interference fit, it is essential that the lower limit of the shaft should be |
| A. | Greater than the upper limit of the hole |
| B. | Lesser than the upper limit of the hole |
| C. | Greater than the lower limit of the hole |
| D. | Lesser than the lower limit of the hole |
| Answer» B. Lesser than the upper limit of the hole | |
| 48. |
During the execution of a CNC part program block NO20 GO2 X45.0 Y25.0 R5.0 ; the type of tool motion will be |
| A. | Circular Interpolation clockwise |
| B. | Circular Interpolation counter clockwise |
| C. | Linear Interpolation |
| D. | Rapid feed |
| Answer» B. Circular Interpolation counter clockwise | |
| 49. |
The mechanism of material removal in EDM process is |
| A. | Melting and Evaporation |
| B. | Melting and Corrosion |
| C. | Erosion and Cavitations |
| D. | Cavitations and Evaporation |
| Answer» B. Melting and Corrosion | |
| 50. |
Which among the NC operations given below are continuous path operations? Arc Welding (AW), Drilling (D), Laser Cutting of Sheet Metal (LC), Milling (M), Punching in Sheet Metal (P), Spot Welding (SW) |
| A. | AW, LC and M |
| B. | AW, D, LC and M |
| C. | D, LC, P and SW |
| D. | D, LC, and SW |
| Answer» B. AW, D, LC and M | |