MCQOPTIONS
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MCQOPTIONS
This section includes 843 Mcqs, each offering curated multiple-choice questions to sharpen your Materials Science and Manufacturing Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A circular hole of 25 mm diameter and depth of 20 mm is machined by EDM process. The material removal rate (in mm /min) is expressed as 4 104 IT 1.23 where I = 300 A and the melting point of the material, T = 1600 C. The time (in minutes) for machining this hole is (correct to two decimal places). |
| A. | 2.1431 min |
| B. | 7.1431 min |
| C. | 78.1431 min |
| D. | 9.1431 min |
| Answer» C. 78.1431 min | |
| 2. |
The flow stress (in MPa) of a material is given by = 500 0.1 where is true strain. The Young's modulus of elasticity of the material is 200 GPa. A block of thickness 100 mm made of this material is compressed to 95 mm thickness and then the load is removed. The final dimension of the block (in mm) is _____. |
| A. | 98.157mm |
| B. | 85.157mm |
| C. | 95.157mm |
| D. | 95mm |
| Answer» D. 95mm | |
| 3. |
Match the items in columns I and II Column-I P. Wrinkling Q. Orange peel R. Stretcher strains S. Earing Column-II 1. Yield point elongation 2. Anisotropy 3. Large grain 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-1 |
| D. | P-4, Q-3, R-1, S-2 |
| Answer» E. | |
| 4. |
Match the correct combination for following metal working processes. Processes ProcessesAssociated state of stressP. Blanking1. Tension Q. Stretch Forming2. CompressionR. Coining3. ShearS. Deep Drawing4. Tension and Compression5. 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-3, R-3, S-1 |
| D. | P-3, Q-1, R-2, S-4 |
| Answer» E. | |
| 5. |
The strength of a brazed joint |
| A. | decreases with increase in gap between the two joining surfaces |
| B. | increases with increase in gap between the two joining surfaces |
| C. | decreases up to certain gap between the two joining surfaces beyond which it increases |
| D. | increases up to certain gap between the two joining surfaces beyond which it decreases |
| Answer» E. | |
| 6. |
A 25 mm hole is pierced in at = 2.5 mm thick steel sheet having shear strength = 350 MPa. If the diametral clearance is given by the expression c = 0.0064 , the die diameter (in mm), punch diameter (in mm) and punch force in (kN) respectively are |
| A. | 25.0, 25.3, 171.8 |
| B. | 25.0, 24.7, 68.75 |
| C. | 24.7, 25.0, 171.8 |
| D. | 25.3, 25.0, 68.75 |
| Answer» E. | |
| 7. |
Determine the load required to punch a 20 mm diameter hole in 2 mm thick sheet. The properties of the material of the sheet are: Tensile strength 580 MPa Yield strength in tension 410 MPa Shear strength 350 MPa Yield strength in shear 250 MPa The load in kN is |
| A. | 31.40 |
| B. | 43.98 |
| C. | 64.40 |
| D. | 91.10 |
| Answer» C. 64.40 | |
| 8. |
Consider the following statements : The size of the heat affected zone (HAZ) will increase with 1. Increased starting temperature 2. Increased welding speed 3. Increased thermal conductivity of the base metal 4. Increase in base metal thickness Which of the statements given above are correct? |
| A. | 1, 2 and 3 |
| B. | 1 and 3 |
| C. | 1 and 4 |
| D. | 2 and 3 |
| Answer» C. 1 and 4 | |
| 9. |
Applying Taylor's equation VT0.25 = 160, the tool |
| A. | 20.36 |
| B. | 22.43 |
| C. | 674 |
| D. | 28.20 |
| Answer» D. 28.20 | |
| 10. |
The following data are given for calculating limits of dimension and tolerances for a hole: Tolerance unit i (microns) = 0.45 (D1/3) + 0.001 D. The unit of D is mm. Diameter step is 18 30. If the fundamental deviation for hole H is zero and IT8 = 26i, the maximum and minimum limits of dimension for a 25H8 hole (in mm) are |
| A. | 24.984 and 24.967 |
| B. | 25.017 and 24.984 |
| C. | 25.033 and 25.00 |
| D. | 25.00, 24.967 |
| Answer» D. 25.00, 24.967 | |
| 11. |
A cylinder of 25 mm diameter and 100 mm length is turned with a tool, for which the relation VT0.25 = 55 is applicable. The cutting velocity is 22 m/min. For a tool feed of 0.046 mm/rev, the number of tool regrinds required to produce 425 cylinders is |
| A. | 12 |
| B. | 22 |
| C. | 43 |
| D. | 85 |
| Answer» E. | |
| 12. |
During the above operation, the drill wears out after producing 200 holes.Taylor's tool life equation is of the form VT0.3 = C, where V = cutting speed in m/min and T= tool life in min. Taylor's constant C will be |
| A. | 15 |
| B. | 72 |
| C. | 93 |
| D. | 490 |
| Answer» C. 93 | |
| 13. |
A mould having dimensions 100 mm 90 mm 20 mm is filled with molten metal through a gate with height h and C.S. area A, the mould filling time is t1 The height is now quadrupled and the cross-sectional area is halved. The corresponding filling time is t2. The ratio t2 /t1 is |
| A. | 1/ |
| B. | 1 |
| C. | |
| D. | 2 |
| Answer» D. 2 | |
| 14. |
Match the following ProcessMedia usedA. EDM1. ElectrolyteB. ECM2. Dielectric3. Abrasive slurry3. MachinabilityD. EBM4. Vacuum |
| A. | A 1, B 2, C 3, D 4 |
| B. | A 2, B 1, C 3, D 4 |
| C. | A 4, B 3, C 2, D 1 |
| D. | A 3, B 4, C 1, D 2 |
| E. | A 3, B 4, C 2, D 1 |
| Answer» C. A 4, B 3, C 2, D 1 | |
| 15. |
Two cubical castings of the same metal and size of 2 cm side and 4 cm side are moulded in green sand. If the smaller casting solidifies in 2 mins, the expected time of solidifications of large casting will be |
| A. | 16 min |
| B. | 2 |
| C. | min |
| D. | 8 min |
| E. | 4 min |
| Answer» D. 8 min | |
| 16. |
Proper gating design in metal casting P. Influences the freezing range of the melt Q. Compensates the loss of fluidity of the melt R. Facilitates top feeding of the melt S. Avoids misrun |
| A. | P, R |
| B. | Q, S |
| C. | R, S |
| D. | P, S |
| Answer» E. | |
| 17. |
The mode of metal transfer in CO2 -MIG welding at low temperature is |
| A. | Spray transfer |
| B. | Short circuiting type of transfer |
| C. | Globular transfer |
| D. | Droplet transfer |
| Answer» E. | |
| 18. |
Match the following products with preferred manufacturing processes: ProductProcessP. Rails1. Blow moldingQ. Engine crankshaft2. ExtrusionR. Aluminium channels3. ForgingS. PET water bottles4. Rolling |
| A. | P-4, Q-3, R-1, S-2 |
| B. | P-4, Q-3, R-2, S-1 |
| C. | P-2, Q-4, R-3, S-1 |
| D. | P-3, Q-4, R-2, S-1 |
| Answer» C. P-2, Q-4, R-3, S-1 | |
| 19. |
The maximum interference in mm after assembly between a bush of size 30+0.06+0.03 and a shaft of size 30+0.04+0.02 is |
| A. | 0.07 |
| B. | 0.05 |
| C. | 0.02 |
| D. | 0.01 |
| Answer» E. | |
| 20. |
Details pertaining to an orthogonal metal cutting process are given below: Chip thickness ratio 0.4 Undeformed thickness 0.6 mm Rake angle +10 Cutting speed 2.5 m/s Mean thickness of primary shear zone 25 microns The shear strain rate in s-1 during the process is |
| A. | 0.1781 10 |
| B. | 0.7754 10 |
| C. | 1.0104 10 |
| D. | 4.397 10 |
| Answer» D. 4.397 10 | |
| 21. |
If the longitudinal feed in centreless grinding is expressed by Vf = DN sin , D stands for |
| A. | Diameter of blank |
| B. | Diameter of finished workpiece |
| C. | Diameter of control wheel |
| D. | Diameter of grinding wheel |
| Answer» D. Diameter of grinding wheel | |
| 22. |
Match the following products with the suitable manufacturing process ProductManufacturing ProcessP. Toothpaste tube1. Centrifugal castingQ. Metallic pipes2. Blow mouldingR. Plastic bottles3. RollingS. Threaded bolts4. Impact extrusion |
| A. | P-4,Q-3,R-1,S-2 |
| B. | P-2, Q-1, R-3, S-4 |
| C. | P-4, Q-1, R-2, S-3 |
| D. | P-1, Q-3, R-4, S-2 |
| Answer» D. P-1, Q-3, R-4, S-2 | |
| 23. |
Match the following: NC CodeDefinitionP. M051. Absolute coordinate systemQ. Q012. DwellR. Q043. Spindle stopS. G904. Linear interpolation |
| A. | P 2, Q 3, R 4, S 1 |
| B. | P 3, Q 4, R 1, S 2 |
| C. | P 3, Q 4, R 2, S 1 |
| D. | P 4, Q 3, R 2, S 1 |
| Answer» B. P 3, Q 4, R 1, S 2 | |
| 24. |
Match the following List-IA. ECM B. USM C. EDM D. LBM List-II 1. Erosion 2. Fusion and vaporization 3. Vaporization and ablation 4. lon displacement |
| A. | A 1, B 3, C 2, D 4 |
| B. | A 3, B 1, C 2, D 4 |
| C. | A 4, B 1, C 2, D 3 |
| D. | A 4, B 1, C 3, D 2 |
| Answer» D. A 4, B 1, C 3, D 2 | |
| 25. |
Match the following Products A. Porous bearings B. Fly wheels C. Double end spanners D. Plastic bottles Manufacturing Process 1. Powder metallurgy 2. Casting 3. Closed die forging 4. Blow moulding |
| A. | A 1, B 2, C 3, D 4 |
| B. | A 1, B 2, C 3, D 4 |
| C. | A 4, B 2, C 3, D 1 |
| D. | A 1, B 4, C 3, D 2 |
| Answer» C. A 4, B 2, C 3, D 1 | |
| 26. |
An electrochemical machining (ECM) is to be used to cut a through hole into a 12 mm thick aluminium plate. The hole has a rectangular cross- section, 10 mm 30 mm. The ECM operation will be accomplished in 2 minutes, with efficiency of 90%. Assuming specific removal rate for aluminium as 3.44 10 2 mm / (A s), the current (in A) required is _____ (correct to two decimal places). |
| A. | 988 |
| B. | 962 |
| C. | 968.992 |
| D. | 868 |
| Answer» D. 868 | |
| 27. |
Which among the NC operations given below are continuous path operations? Arc Welding (AW) Drilling (D) Laser Cutting of Sheet (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 | |
| 28. |
For the CNC part programming, match Group A with Group B: Group A P. Circular interpolation, counter clock wise Q. dwell R. circular interpolation, clock wise S. point to point countering Group B I. G02 II. G03 III.G04 IV. G00 |
| A. | P-II, Q-III, R-I, S-IV |
| B. | p -I, Q-III, R-II, S-IV |
| C. | P-I, Q-IV, R-II, S-III |
| D. | p-II, Q-I, R-III, S-IV |
| Answer» B. p -I, Q-III, R-II, S-IV | |
| 29. |
In an interchangeable assembly, shafts of size 25.000+0.040-0.010 mm mate with holes of size 25.000+0.030-0.020 mm. The maximum interference (in microns) in the assembly is |
| A. | 40 |
| B. | 30 |
| C. | 20 |
| D. | 10 |
| Answer» D. 10 | |
| 30. |
A cylindrical pin of diameter 1.996+0.015-0.015 mm is assembled into a hole of diameter 2.000+0.015-0.015 mm. The allowance (in mm) provides for this assembly is |
| A. | 0.001 |
| B. | 0.015 |
| C. | 0.025 |
| D. | 0.035 |
| Answer» B. 0.015 | |
| 31. |
The diameter of a hole is given as 50.00+0.015-0.0 mm. The upper limit on the dimensions in mm, of the shaft for achieving maximum interference of 50 microns is _______. |
| A. | 10 microns |
| B. | 30 microns |
| C. | 40 microns |
| D. | 28 microns |
| Answer» C. 40 microns | |
| 32. |
Component process A. Square hole in a high strength alloy B. Square hole in a ceramic component C. Blind holes in a die D. Turbine blade profile on high strength alloy 1. Milling 2. Drilling 3. ECM 4. Jig boring 5. EDM 6. USM |
| A. | A 5, B 6, C 1, D 3 |
| B. | A 5, B 5, C 2, D 3 |
| C. | A 1, B 6, C 2, D 3 |
| D. | A 5, B 6, C 2, D 3 |
| Answer» E. | |
| 33. |
Two metallic sheets, each of 2.0 mm thickness, are welded in a lap joint configuration by resistance spot welding at a welding current of 10 kA and welding time of 10 millisecond. A spherical fusion zone extending up to the full thickness of each sheet is formed and properties of the metallic sheets are given as: Ambient temperature = 293 K Melting temperature = 1793 K Density = 7000 kg/m Latent heat of fusion = 300 kJ/kg Specific heat = 800 J/kgK. Assume: (i) contact resistance along sheet-interface is 500 micro-ohm and along electrode-sheet interface is zero; (ii) no conductive heat loss through the bulk sheet materials; and (iii) the complete weld fusion zone is at the melting temperature. The melting efficiency (in%) of the process is |
| A. | 50.37 |
| B. | 60.37 |
| C. | 70.37 |
| D. | 80.37 |
| Answer» D. 80.37 | |
| 34. |
For the given assembly: 25 H78g8, match Group A with Group BGroup-AGroup BP. HI. Shaft TypeQ. IT8II. Hole TypeR. IT7III. Hole tolerance GradeS. 9IV. Shaft Tolerance Grade |
| A. | P I, Q III, R IV, S II |
| B. | P I, Q IV, R III, S II |
| C. | P II, Q III, R IV, S I |
| D. | P II, Q IV, R III, S I |
| Answer» E. | |
| 35. |
Cylindrical pins of 25+0.010+0.020mm diameter are electroplated in a shop. Thickness of the plating is 30 2.0 micron. Neglecting gauge tolerance, the sized of the GO gage in mm to inspect the plated component is |
| A. | 25.042 |
| B. | 25.052 |
| C. | 25.074 |
| D. | 25.084 |
| Answer» E. | |
| 36. |
Given the atomic weight of Fe is 56 and that of C is 12, the weight percentage of carbon in cementite (Fe3C) is _______. |
| A. | 68.7% |
| B. | 66.7% |
| C. | 70.7% |
| D. | 96.7% |
| Answer» C. 70.7% | |
| 37. |
Match the following ProcessProperties of work materialA. Casting1. DuctilityB. Forging2. MalleabilityC. Wire drawing3. MachinabilityD. Turning4. Fluidity |
| A. | A 2, B 4, C 1, D 3, |
| B. | A 4, B 1, C 2, D 3, |
| C. | A 4, B 2, C 1, D 3, |
| D. | A 4, B 3, C 1, D 2, |
| Answer» D. A 4, B 3, C 1, D 2, | |
| 38. |
Match the following Machine Components A. Machine tool bed B. Machine tool spindle C. Cutting tool D. Worm wheel Material used 1. Forged used 2. HSS 3. Bronze 4. Cast iron |
| A. | A 3, B 4, C 2, D 3 |
| B. | A 4, B 3, C 2, D 1 |
| C. | A 1, B 2, C 3, D 4 |
| D. | A 4, B 1, C 2, D 3 |
| Answer» E. | |
| 39. |
The skid in a stylus type roughness measuring instrument is used to provide... A.... and define .... B.... geometrical profile of the surface. A. support/datum B. micro/macro |
| A. | Datum |
| B. | Macro |
| C. | Both A and B |
| D. | None of the above |
| Answer» D. None of the above | |
| 40. |
Match the following A. Rail sections B. Plastic sheets C. Allen boltsD. Porous bearing1. Powder metallurgy 2. Rolling 3. Cold forming 4. Transfer moulding 5. Calendering 6. Injection molding |
| A. | A 2, B 5, C 3, D 1 |
| B. | A 5, B 2, C 3, D 1 |
| C. | A 1, B 5, C 3, D 2 |
| D. | A 2, B 3, C 5, D 1 |
| Answer» B. A 5, B 2, C 3, D 1 | |
| 41. |
Match the following Process A. Explosive welding B. Brazing C. Thermit welding D. Manual metal arc welding Associated Mechanism1. Liquid state 2. Solid state 3. Solid liquid state 4. Liquid state Chemical |
| A. | A-2, B - 3, C-4, D-4 |
| B. | A-3, B - 2, C-4, D-4 |
| C. | A-4, B - 3, C-2, D-1 |
| D. | A-2, B - 3, C-4, D-1 |
| Answer» B. A-3, B - 2, C-4, D-4 | |
| 42. |
The extrusion processes used for the production of toothpaste tubes is/are 1. tube extrusion 2. forward extrusion 3. impact extrusion |
| A. | 1 only |
| B. | 1 and 2 |
| C. | 2 and 3 |
| D. | 3 only |
| Answer» E. | |
| 43. |
Welding application process List-IA. High reactive metals B. Long straight butt joint in thick sections C. Site weld of rails D. MS rods to plate like components List-II1. Ultrasonic 2. Thermit 3. Electron beam 4. Submerged arc 5. Stud |
| A. | A - 3, B - 4, C - 2, D - 5 |
| B. | A - 5, B - 4, C - 2, D - 3 |
| C. | A - 3, B - 2, C - 4, D - 5 |
| D. | A - 4, B - 3, C - 2, D - 5 |
| Answer» B. A - 5, B - 4, C - 2, D - 3 | |
| 44. |
Assertion (A): End standards are used for precision component inspection. Reason (R): In end standards line of measurement coincides with line of indication. |
| A. | Both A and R are correct and R explains A |
| B. | Both A and R are true but R not explains A |
| C. | A is true but R is false |
| D. | A is false but R is true |
| Answer» D. A is false but R is true | |
| 45. |
Match the following List-I A. Grinding B. TappingC. AutomaticsD. BroachingList-II 1. Compounded oil 2. EP additive oil 3. Chemical fluids 4. Straight fatty oils |
| A. | A 3, B 4, C 1, D 2 |
| B. | A 2, B 4, C 3, D 2 |
| C. | A 2, B 4, C 1, D 3 |
| D. | A 4, B 3, C 1, D 2 |
| Answer» B. A 2, B 4, C 3, D 2 | |
| 46. |
Assertion (A): Grinding needs higher specific cutting energy than milling. Reason (R): Milling cutter material is harder than abrasive grains. |
| A. | Both A and R are true and R is the correct explanation of A |
| B. | Both A and R are true but R is not a correct explanation of A |
| C. | A Is true but R is false |
| D. | A is false but R is true |
| Answer» D. A is false but R is true | |
| 47. |
Consider the following statements with respect to the relief angle of cutting tool: 1. This affects the direction of chip flow. 2. This reduces excessive friction between the tool and workpiece 3. This affects tool life 4. This allows better access of coolant at the tool-workpiece interface Which of the statements given above are correct? |
| A. | 1 and 2 |
| B. | 2 and 3 |
| C. | 2 and 4 |
| D. | 3 and 4 |
| Answer» C. 2 and 4 | |
| 48. |
The purpose of helical grooves in a twist drill is to 1. Improve the stiffness 2. Save a tool material 3. Provide space for chip removal 4. Provide rake angle for the cutting edge Select the correct answer suing the codes given below: |
| A. | 1 and 2 |
| B. | 2 and 3 |
| C. | 3 and 4 |
| D. | 1 and 4 |
| Answer» D. 1 and 4 | |
| 49. |
Which pair amount the following solid state welding processes uses heat from an external source P. Diffusion welding Q. Friction welding R. Ultrasonic welding S. Forge welding |
| A. | P and R |
| B. | R and S |
| C. | Q and S |
| D. | P and S |
| Answer» E. | |
| 50. |
Assertion (A): A sound welded joint should not only be strong enough but should also exhibits a good amount of ductility. Reason (R): Welding process is used for fabricating mild Steel components only. |
| A. | Both A and R are true and R is the correct explanation of A |
| B. | Both A and R are true but R is not a correct explanation of A |
| C. | A is true but R is false |
| D. | A is false but R is true |
| Answer» D. A is false but R is true | |