MCQOPTIONS
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MCQOPTIONS
This section includes 119 Mcqs, each offering curated multiple-choice questions to sharpen your Manufacturing Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The work involved with the internal shearing process due to non-uniform deformation is? |
| A. | Ideal work |
| B. | Frictional work |
| C. | Redundant work |
| D. | Slip work |
| Answer» D. Slip work | |
| 2. |
In metal forming process the hardness of the material? |
| A. | Decreases |
| B. | Remains same |
| C. | Initially increases and then decreases |
| D. | Increases |
| Answer» E. | |
| 3. |
In which of the following process plastic deformation takes place? |
| A. | Cold working |
| B. | Hot working |
| C. | Both cold working and hot working |
| D. | Cannot say |
| Answer» D. Cannot say | |
| 4. |
Which of the following defect is eliminated by hot working process? |
| A. | Cold shut |
| B. | Misrun |
| C. | Blow holes |
| D. | Fusion |
| Answer» D. Fusion | |
| 5. |
During hot working, the grain growth can take place in which part of the material? |
| A. | Exterior |
| B. | Interior |
| C. | Along the edges |
| D. | Side faces |
| Answer» C. Along the edges | |
| 6. |
If Tm is the melting temperature, then in hot working the value for that material is? |
| A. | 0.5 Tm |
| B. | 0.6 Tm |
| C. | 0.4 Tm |
| D. | 0.7 Tm |
| Answer» C. 0.4 Tm | |
| 7. |
In drawing operation the metal flows due to |
| A. | Ductility |
| B. | Work hardening |
| C. | Plasticity |
| D. | Shearing |
| Answer» D. Shearing | |
| 8. |
Match the correct combination for following metal-working processes.ProcessesAssociated state of stressP. Blanking 1. TensionQ. Stretch Forming 2. CompressionR. Coining 3. ShearS. Deep Drawing4. Tension and Compression 5. Tension and Shear |
| A. | P – 2, Q – 1, R – 3, S – 4 |
| B. | P – 3, Q – 4, R – 1, S – 5 |
| C. | P – 5, Q – 4, R – 3, S – 1 |
| D. | P – 3, Q – 1, R – 2, S – 4 |
| Answer» E. | |
| 9. |
Extrusion is a type of ______ operation. |
| A. | Hot Working and Cold Working |
| B. | Casting |
| C. | Welding |
| D. | Fitting |
| Answer» B. Casting | |
| 10. |
A 1.5 mm thick sheet is subjected to unequal biaxial stretching and the true strains in the directions of stretching are 0.05 and 0.09 the final thickness of the sheet in mm is |
| A. | 1.473 |
| B. | 1.304 |
| C. | 1.362 |
| D. | 289 |
| Answer» C. 1.362 | |
| 11. |
For wire drawing operation, the work material should be- |
| A. | Ductile |
| B. | Tough |
| C. | Malleable |
| D. | Resilient |
| Answer» B. Tough | |
| 12. |
Blanking and piercing operations can be performed simultaneously in |
| A. | Simple die |
| B. | Compound die |
| C. | Progressive die |
| D. | Combination die |
| Answer» D. Combination die | |
| 13. |
A 2 mm thick metal sheet is to be bent at an angle of 1.6 radian with the radius of 150 mm. Distance of neutral axis from inside surface is 0.5 × sheet thickness. Find out bend allowance. |
| A. | 241.6 mm |
| B. | 281.6 mm |
| C. | 301.6 mm |
| D. | 321.6 mm |
| Answer» B. 281.6 mm | |
| 14. |
_____________ consists of pressing a metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part. |
| A. | Hot spinning |
| B. | Hot extrusion |
| C. | Hot pickling |
| D. | Cold peening |
| Answer» C. Hot pickling | |
| 15. |
A metallic strip having a thickness of 12 mm is to be rolled using two steel rolls, each of 800 mm diameter. It is assumed that there is no change in the width of the strip during rolling. In order to achieve 10% reduction in the cross-sectional area of the strip after rolling, the angle subtended (in degrees) by the deformation zone at the center of the roll is |
| A. | 1.84 |
| B. | 3.14 |
| C. | 6.84 |
| D. | 8.23 |
| Answer» C. 6.84 | |
| 16. |
In a single pass rolling operation, the thickness of a 100 mm wide plate is reduced from 20 mm to 15 mm. The roller radius is 125 mm and rotational speed is 8 rpm. The average flow stress for the plate material is 400 MPa. The power required for rolling operation in kW is? |
| A. | \(\frac{12.5\pi }{3}\) |
| B. | 10π |
| C. | \(\frac{40\pi }{3}\) |
| D. | \(\frac{20\pi }{3}\) |
| Answer» E. | |
| 17. |
Following is the process used to form powder metal to shape. |
| A. | Sintering |
| B. | Explosive compacting |
| C. | Isostatic moulding |
| D. | All of these |
| Answer» D. All of these | |
| 18. |
In metal forming, ring compression test is carried out to find out |
| A. | Compressive strength |
| B. | Interface friction |
| C. | Upset ratio |
| D. | None of these |
| Answer» C. Upset ratio | |
| 19. |
A cylindrical cup of circular cross section of 50 mm diameter and 60 mm height with corner radius of 2.5 mm is to be made of 0.5 mm thick sheet of steel. Its blank diameter (approximately) will be: |
| A. | 120 mm |
| B. | 140 mm |
| C. | 160 mm |
| D. | 180 mm |
| Answer» B. 140 mm | |
| 20. |
Consider the following statements regarding powder metallurgy:1) Refractory materials made of tungsten can be manufactured easily.2) In metal powder control of grain size results in relatively much uniform structure.3) The power heated in die or mould at high temperature is then pressed and compressed to get desired shape and strength.4) In sintering, the metal power is gradually heated resulting in coherent bond.Which of the above statements are correct? |
| A. | 1, 2 and 3 only |
| B. | 1, 2 and 4 only |
| C. | 2, 3 and 4 only |
| D. | 1, 2, 3 and 4 |
| Answer» C. 2, 3 and 4 only | |
| 21. |
Match List I correctly with List-II and select your answer using the codes given below the lists:List IList IIa) Aluminium brake shoe1. Deep drawingb) Plastic water bottle2. Blow mouldingc) Stainless steel cups3. Sand castingd) Soft drink can (aluminium)4. Centrifugal casting 5. Impact extrusion 6. Upset forging |
| A. | a-1, b-2, c-3, d-4 |
| B. | a-4, b-3, c-2, d-1 |
| C. | a-3, b-2, c-5, d-1 |
| D. | a-3, b-6, c-5, d-4 |
| Answer» D. a-3, b-6, c-5, d-4 | |
| 22. |
_______ is the process by which great pressure is applied to a heated metal billet or blank causing it to flow through a restricted orifice. |
| A. | Extrusion |
| B. | Hot rolling |
| C. | Tubing |
| D. | Cold rolling |
| Answer» B. Hot rolling | |
| 23. |
A shear of 20 mm (S = 20 mm) is now provided on the blade. Assuming force vs displacement curve to be trapezoidal, the maximum force (in kN) exerted is |
| A. | 5 |
| B. | 10 |
| C. | 20 |
| D. | 40 |
| Answer» C. 20 | |
| 24. |
In a single pass rolling operation, a 20 mm thick plate with plate width of 100 mm, is reduced to 18 mm. The roller radius is 250 mm and rotational speed is 10 rpm. The average flow stress for the plate material is 300 MPa. The power required for the rolling operation in kW is closest to |
| A. | 15.2 |
| B. | 17.5 |
| C. | 30.4 |
| D. | None of these |
| Answer» B. 17.5 | |
| 25. |
“Hems and seams” are related to: |
| A. | sheet metal |
| B. | casting |
| C. | alloying |
| D. | heat treatment |
| Answer» B. casting | |
| 26. |
In a single pass rolling process using 410 mm diameter steel rollers, a strip of width 140 mm and thickness 8 mm undergoes 10% reduction of thickness. The angle of bite in radians is |
| A. | 0.006 |
| B. | 0.031 |
| C. | 0.062 |
| D. | 0.6 |
| Answer» D. 0.6 | |
| 27. |
A 4 mm thick sheet is rolled with 300 mm diameter rolls to reduce thickness without any change in its width. The friction coefficient at the work-roll interface is 0.1. The minimum possible thickness of the sheet that can be produced in a single pass is: |
| A. | 1.0 mm |
| B. | 1.5 mm |
| C. | 2.5 mm |
| D. | 3.7 mm |
| Answer» D. 3.7 mm | |
| 28. |
In a deep drawing of sheets, the value of limiting draw ratio depends on: |
| A. | thickness of a sheet |
| B. | type of press used |
| C. | yield strength of sheet metal |
| D. | percentage elongation of sheet metal |
| Answer» B. type of press used | |
| 29. |
A punch is used for making holes in steel plates with thickness 8 mm. If the punch diameter is 20 mm and force required for creating a hole is 110 kN, the average shear stress in the plate will be nearly |
| A. | 139 MPa |
| B. | 219 MPa |
| C. | 336 MPa |
| D. | 416 MPa |
| Answer» C. 336 MPa | |
| 30. |
Identify the stress state in the flange portion of a partially drawn cylindrical cup when deep drawing without a blank holder |
| A. | Tensile in all three directions |
| B. | No stress in the flange at all, because there is no blank holder |
| C. | Tensile stress in one direction and compressive in the other direction |
| D. | Compressive in two directions and tensile in the third direction |
| Answer» D. Compressive in two directions and tensile in the third direction | |
| 31. |
Mechanical pulverization, electrolytic process, chemical reduction process and atomization are the different processes employed for: |
| A. | Mixing of different constituents before melting of metals in furnace |
| B. | Preparation of powders in powder metallurgy |
| C. | Cleaning and deburring of castings |
| D. | Surface finishing processes for castings |
| Answer» C. Cleaning and deburring of castings | |
| 32. |
A 100 mm long cylindrical workpiece of diameter 50 mm is reduced to 25 mm diameter using extrusion process. The flow curve for the metal has strength coefficient as K = 750 MPa and the strain hardening co-efficient is 0.15. Assuming no friction and no redundant work, the required ram pressure (in MPa) is closest to |
| A. | 164 |
| B. | 364 |
| C. | 428 |
| D. | 950 |
| Answer» E. | |
| 33. |
A rod of length 20 mm is stretched to make a rod of length 40 mm. Subsequently, it is compressed to make a rod of final length 10 mm. Consider the longitudinal tensile strain as positive and compressive strain as negative. The total true longitudinal strain in the rod is |
| A. | -0.5 |
| B. | – 0.69 |
| C. | – 0.75 |
| D. | – 1.0 |
| Answer» C. – 0.75 | |
| 34. |
A rolling mill is used to reduce the thickness of a plate from 50 mm to 25 mm. The roll diameter is 700 mm and the coefficient of friction at the roll work interface is 0.1. It is required that the draft in each pass must be the same. Assuming no front and back tensions, the minimum number of passes required in the rolling are: |
| A. | 16 |
| B. | 8 |
| C. | 4 |
| D. | 12 |
| Answer» C. 4 | |
| 35. |
Extrusion is the process of |
| A. | Producing holes by arc |
| B. | Metal shaping on presses |
| C. | Pushing the heated billet of metal through the orifice |
| D. | Welding two dissimilar metals |
| Answer» D. Welding two dissimilar metals | |
| 36. |
A 10 mm diameter annealed steel wire is drawn through a die at a speed of 0.5 m/sec to reduce the diameter by 20%. The yield stress of material is 800 MPa. Neglecting friction & strain hardening, calculate the power required for the drawing process (in kW) is _____? |
| A. | 8.97 |
| B. | 14 |
| C. | 17.95 |
| D. | 28 |
| Answer» B. 14 | |
| 37. |
One of the advantages given below of the forged parts is not correct, find it: |
| A. | High production rate |
| B. | Higher forging head |
| C. | Less die wear |
| D. | Lower forging temperature |
| Answer» D. Lower forging temperature | |
| 38. |
Mass production of seamless tubes is by the process of |
| A. | Rolling |
| B. | Spinning |
| C. | Welding |
| D. | Extrusion |
| Answer» E. | |
| 39. |
A hydraulic press is used to produce circular blanks of 10 mm diameter from a sheet of 2 mm thickness. If the shear strength of sheet material is 400 N/mm2, the force required to produce a circular blank is- |
| A. | 8 kN |
| B. | 25.13 kN |
| C. | 31.42 kN |
| D. | 125.66 kN |
| Answer» C. 31.42 kN | |
| 40. |
Find the blanking force required to punch 10 mm diameter holes in a steel sheet of 3 mm thickness. Given shear strength of material = 400 MPa, penetration = 40% and shear provided on the punch = 2 mm. |
| A. | 22.6 kN |
| B. | 37.7 kN |
| C. | 61.6 kN |
| D. | 94.3 kN |
| Answer» B. 37.7 kN | |
| 41. |
An important product manufactured by rolling is |
| A. | I - section |
| B. | Tubes |
| C. | Metal Rolls |
| D. | Rollers |
| Answer» B. Tubes | |
| 42. |
Match the following metal forming process with their associated stress in the workpiece.List IList IIPCoining1.TensileQWire Drawing2.ShearRBlanking3.Tensile compressiveSDeep drawing4.Compressive |
| A. | P – 4, Q – 1, R – 2, S – 3 |
| B. | P – 4, Q – 1, R – 3, S – 2 |
| C. | P – 1, Q – 2, R – 4, S – 3 |
| D. | P – 1, Q – 3, R – 2, S – 4 |
| Answer» B. P – 4, Q – 1, R – 3, S – 2 | |
| 43. |
Match the items in columns I and II.Column IColumn II(P) Wrinkling(1) Yield point elongation(Q) Orange peel(2) Anisotropy(R) Stretcher strains(3) Large grain size(S) Earing(4) Insufficient blank holding force (5) Fine grain size (6) Excessive blank holding force |
| A. | P - 6 Q - 3 R - 1 S - 2 |
| B. | P - 4 Q - 5 R - 6 S - 1 |
| C. | P - 2 Q - 5 R - 3 S – 4 |
| D. | P - 4 Q - 3 R - 1 S - 2 |
| Answer» E. | |
| 44. |
In a blanking operation, the clearance is provided on |
| A. | the die |
| B. | both the die and the punch equally |
| C. | the punch |
| D. | neither the punch nor the die |
| Answer» D. neither the punch nor the die | |
| 45. |
Cold working of metal forming processes is carried out ______. |
| A. | below the recrystallising temperature |
| B. | above the recrystallising temperature |
| C. | above the melting point |
| D. | below the melting point |
| Answer» B. above the recrystallising temperature | |
| 46. |
A set of jobs A, B, C, D, E, F, G, H arrive at time t = 0 for processing on turning and grinding machines. Each job needs to be processed in sequence - first on the turning machine and second on the grinding machine, and the grinding must occur immediately after turning. The processing times of the jobs are given below.JobABCDEFGHTurning (minutes)248976510 Grinding (minutes) 61379524If the makespan is to be minimized, then the optimal sequence in which these jobs must be processed on the turning and grinding machines is |
| A. | A-D-E-F-H-C-G-B |
| B. | G-E-D-F-H-C-A-B |
| C. | A-E-D-F-H-C-G-B |
| D. | B-G-C-H-F-D-E-A |
| Answer» D. B-G-C-H-F-D-E-A | |
| 47. |
Consider the following statements about forging:1. Forgings have high strength and ductility.2. Forgings offer great resistance to impact and fatigue loads.3. Forging assures uniformity in density as well as dimensions of the forged parts.Which of the above statements are correct? |
| A. | 1 and 2 only |
| B. | 1 and 3 only |
| C. | 2 and 3 only |
| D. | 1, 2 and 3 |
| Answer» D. 1, 2 and 3 | |
| 48. |
In hammer forging, the hammer does not consist of: |
| A. | Falling Weight |
| B. | Anvil |
| C. | Die |
| D. | Lifting mechanism for the ram |
| Answer» C. Die | |
| 49. |
In Die cutting operation, punching a number of holes in a sheet is called |
| A. | Perforating |
| B. | Parting |
| C. | Notching |
| D. | Lancing |
| Answer» B. Parting | |
| 50. |
For successful extrusion, the metal should be |
| A. | Ductile |
| B. | Malleable |
| C. | Plastic |
| D. | Tough |
| Answer» D. Tough | |