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.
| 51. |
In a rolling process, the state of stress of the material undergoing deformation is |
| A. | Pure compression |
| B. | Pure shear |
| C. | Compression and shear |
| D. | Tension and shear |
| Answer» D. Tension and shear | |
| 52. |
In the deep drawing of cups, blanks show a tendency to wrinkle up around the periphery (flange). The most likely cause and remedy of the phenomenon are, respectively, |
| A. | Buckling due to circumferential compression ; Increase blank holder pressure |
| B. | High blank holder pressure and high friction ; Reduce blank holder pressure and apply lubricant. |
| C. | High temperature causing increase in circumferential length ; Apply coolant to blank |
| D. | Buckling due to circumferential compression ; decrease blank holder pressure |
| Answer» B. High blank holder pressure and high friction ; Reduce blank holder pressure and apply lubricant. | |
| 53. |
Cutting and forming operation can be performed in a single operation in a _______ die. |
| A. | Progressive |
| B. | Combination |
| C. | Simple |
| D. | Compound |
| Answer» C. Simple | |
| 54. |
In the process of metal rolling operation, along the arc of contact in the roll gap there is a point called the neutral point, because |
| A. | on one side of this point, the work material is in tension and on the other side, the work material is in compression |
| B. | on one side of this point, the work material has velocity greater than that of the roll and on the other side, it has velocity lesser than that of the roll |
| C. | on one side of this point, the work material has rough surface finish and on the other side, the work material has very fine finish |
| D. | at this point there is no increase in material width, but on either side of neutral point, the material width increases |
| Answer» C. on one side of this point, the work material has rough surface finish and on the other side, the work material has very fine finish | |
| 55. |
In a wire drawing operation, diameter of a steel wire is reduced from 10 mm to 8 mm. The mean flow stress of the material is 400 MPa. The ideal force requied for drawing (ignoring friction and redundant work) is: |
| A. | 4.48 kN |
| B. | 8.97 kN |
| C. | 20.11 kN |
| D. | 31.41 kN |
| Answer» C. 20.11 kN | |
| 56. |
A shell of 100 mm diameter and 100 mm height with the corner radius of 0.4 mm is to be produced by cup drawing. The required blank diameter is |
| A. | 118 mm |
| B. | 161 mm |
| C. | 224 mm |
| D. | 312 mm |
| Answer» D. 312 mm | |
| 57. |
In the drawing process, tractix curve is a special profile in which the radius of curvature: |
| A. | Continuously increases |
| B. | Continuously decreases |
| C. | Remains same |
| D. | None of the above |
| Answer» B. Continuously decreases | |
| 58. |
Coining resembles |
| A. | upset forging |
| B. | flashless forging |
| C. | open-die forging |
| D. | swaging |
| Answer» C. open-die forging | |
| 59. |
A process of making cup-shaped parts from sheet metal blanks with the help of punch is known as: |
| A. | deep drawing |
| B. | extrusion |
| C. | piercing |
| D. | upsetting |
| Answer» B. extrusion | |
| 60. |
In powder metallurgy, sintering of the component |
| A. | Increases density and reduces ductility. |
| B. | Increases porosity and reduces density. |
| C. | Increases density and reduces porosity. |
| D. | Increases porosity and reduces brittleness. |
| Answer» D. Increases porosity and reduces brittleness. | |
| 61. |
Cold working increases |
| A. | impact strength |
| B. | ductility |
| C. | percentage of elongation |
| D. | fatigue strength |
| Answer» E. | |
| 62. |
In powder metallurgy, the metal powder particle size is reduced during atomization by |
| A. | Decreasing gas velocity |
| B. | Increasing gas velocity |
| C. | Decreasing gas pressure |
| D. | Decreasing metal volume |
| Answer» C. Decreasing gas pressure | |
| 63. |
In the forging operation, fullering is done to |
| A. | Draw out the material |
| B. | Bend the material |
| C. | Upset the material |
| D. | Extrude the material |
| Answer» B. Bend the material | |
| 64. |
Calculate the punch size in mm, for a circular blanking operation for which details are given below:Size of the blank 25 mmThickness of the sheet 2 mmRadial clearance between punch and die 0.06 mmDie allowance 0.05 mm |
| A. | 24.83 |
| B. | 24.89 |
| C. | 25.01 |
| D. | 25.17 |
| Answer» B. 24.89 | |
| 65. |
It is desired to make a product having T-shaped cross-section from a rectangular aluminium block. Which one of the following processes is expected to provide the highest strength of the product? |
| A. | Welding |
| B. | Casting |
| C. | Metal forming |
| D. | Machining |
| Answer» D. Machining | |
| 66. |
A toothpaste tube can be produced by |
| A. | solid forward extrusion |
| B. | solid backward extrusion |
| C. | hollow backward extrusion |
| D. | hollow forward extrusion |
| Answer» D. hollow forward extrusion | |
| 67. |
A hole of diameter 35 mm is to be punched in a sheet metal of thickness t and ultimate shear strength 400 MPa, using punching force of 44 kN. The maximum value of t is |
| A. | 0.5 mm |
| B. | 10 mm |
| C. | 1 mm |
| D. | 2 mm |
| Answer» D. 2 mm | |
| 68. |
A strip of thickness 40 mm is to be rolled to thickness of 20 mm using a two-high mill having rolls of diameter 200 mm. coefficient of friction and arc length in mm, respectively are |
| A. | 0.45 and 38.84 |
| B. | 0.39 and 38.84 |
| C. | 0.39 and 44.72 |
| D. | 0.45 and 44.72 |
| Answer» E. | |
| 69. |
In drop forging, forging is done by dropping |
| A. | the work piece at high velocity |
| B. | the hammer at high velocity |
| C. | the die with hammer at high velocity |
| D. | a weight on hammer to hammer to produce the requisite impact |
| Answer» D. a weight on hammer to hammer to produce the requisite impact | |
| 70. |
In open-die forging, a disc of diameter 200 mm and height 60 mm is compressed without any barreling effect. The final diameter of the disc is 400 mm. the true strain is |
| A. | 1.986 |
| B. | 1.686 |
| C. | 1.386 |
| D. | 0.602 |
| Answer» D. 0.602 | |
| 71. |
A hole of diameter (d) is to be punched through a sheet metal of thickness (t). How much force is required to punch the hole if the ultimate shear stress of the sheet metal is (τ)? |
| A. | dtτ |
| B. | \(\frac{\pi }{4}{d^2}t\tau \) |
| C. | πdtτ |
| D. | \(\frac{\pi }{4}{d^2}\tau \) |
| Answer» D. \(\frac{\pi }{4}{d^2}\tau \) | |
| 72. |
Channels, Angles and I - section, which are used in fabricating a shed structure frame, are manufactured from blooms using the process of |
| A. | Casting |
| B. | Drawing |
| C. | Swaging |
| D. | Rolling |
| Answer» E. | |
| 73. |
In a two-stage wire drawing operation, the fractional reduction (ratio of change in cross-sectional area to initial cross-sectional area) in the first stage is 0.4. The fractional reduction in the second stage is 0.3. The overall fractional reduction is |
| A. | 0.24 |
| B. | 0.58 |
| C. | 0.6 |
| D. | 1 |
| Answer» C. 0.6 | |
| 74. |
A 80 mm thick steel plate with 400 mm width is rolled to 40 mm thickness in 4 passes with equal reduction in each pass, by using rolls of 800 mm diameter. Assuming the plane-strain deformation, what is the minimum coefficient of friction required for unaided rolling to be possible? |
| A. | 0.111 |
| B. | 0.158 |
| C. | 0.223 |
| D. | 0.316 |
| Answer» C. 0.223 | |
| 75. |
In which process is the diameter of a tube reduced or increased by forcing into a confined die? |
| A. | Swaging |
| B. | Embossing |
| C. | Lancing |
| D. | Forging |
| Answer» B. Embossing | |
| 76. |
In a rolling operation, the thickness of a rectangular piece is reduced from t1 to t2. The radius of both the rolls are equal to R. The angle of bite (θ) will be given by: |
| A. | \(\theta = {\cos ^{ - 1}}\left[ {1 - \frac{{{t_1} - {t_2}}}{{2R}}} \right]\) |
| B. | \(\theta = {\cos ^{ - 1}}\left[ {\frac{{{t_1} - {t_2}}}{{2R}}} \right]\) |
| C. | \(\theta = {\cos ^{ - 1}}\left[ {1 - \frac{{2R}}{{{t_1} - {t_2}}}} \right]\) |
| D. | \(\theta = {\cos ^{ - 1}}\left[ {\frac{{2R}}{{{t_1} - {t_2}}}} \right]\) |
| Answer» B. \(\theta = {\cos ^{ - 1}}\left[ {\frac{{{t_1} - {t_2}}}{{2R}}} \right]\) | |
| 77. |
In a rolling process, the maximum possible draft, defined as the difference between the initial and the final thickness of the metal sheet, mainly depends on which pair of the following parametersP : StrainQ : Strength of the work materialR : Roll diameterS : Roll velocityT : Coefficient of friction between roll and work |
| A. | Q, S |
| B. | R, T |
| C. | S, T |
| D. | P, R |
| Answer» C. S, T | |
| 78. |
Match the following products with the suitable manufacturing process Product Manufacturing Process P Toothpaste tube 1 Centrifugal casting Q Metallic pipes 2 Blow moulding R Plastic bottles 3 Rolling S Threaded bolts 4 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 | |
| 79. |
In manufacturing of self-lubricating bearings by powder metallurgy, an important secondary operation that is carried out after sintering is |
| A. | Cold isostatic pressing |
| B. | Hot isostatic pressing |
| C. | Impregnation |
| D. | Infiltration |
| Answer» D. Infiltration | |
| 80. |
In drop forging, forging is done by droping: |
| A. | The work piece at high velocity |
| B. | The hammer at high velocity |
| C. | The die with hammer at high velocity |
| D. | A weight on hammer to hammer to produce the requisite impact |
| Answer» D. A weight on hammer to hammer to produce the requisite impact | |
| 81. |
In wire drawing process, the bright shining surface on the wire is obtained if one |
| A. | Not using a lubricant |
| B. | Low tooling cost |
| C. | Uses thick paste lubricant |
| D. | Use thin fluid lubricant |
| Answer» E. | |
| 82. |
Materials used for thread rolling operations should be |
| A. | Ductile |
| B. | Ferrous |
| C. | Malleable |
| D. | None of the above |
| Answer» B. Ferrous | |
| 83. |
Bolt heads are manufactured by |
| A. | Swagging |
| B. | Roll forging |
| C. | Tumbling |
| D. | Upset forging |
| Answer» E. | |
| 84. |
In blanking operation, the angle of shear is provided on |
| A. | die |
| B. | punch |
| C. | both punch and die |
| D. | can be on either die or punch |
| Answer» B. punch | |
| 85. |
In sheet metal working, shear is provided on punches and dies so that: |
| A. | Press load is reduced |
| B. | Good cut edge is obtained |
| C. | Warping of sheet is minimised |
| D. | Cut blanks are straight |
| Answer» B. Good cut edge is obtained | |
| 86. |
Anisotropy in rolled components is caused by |
| A. | Change in dimensions |
| B. | Scale formation |
| C. | Closure of defects |
| D. | Grain orientation |
| Answer» E. | |
| 87. |
In hot die forging, thin layer of material all around the forging is |
| A. | gutter space, which fills up hot gases |
| B. | flash, the width of it is an indicator of the pressure developed in the cavity |
| C. | coining, which indicates the quality of the forging |
| D. | cavity, which is filled with hot impurities in the material |
| Answer» C. coining, which indicates the quality of the forging | |
| 88. |
Assuming force vs displacement curve to be rectangular, the work done (in J) is |
| A. | 100 |
| B. | 200 |
| C. | 250 |
| D. | 300 |
| Answer» B. 200 | |
| 89. |
“A process of pushing the heated billet or slug of metal through an orifice provided into a die” is known as: |
| A. | extrusion |
| B. | deep drawing |
| C. | piercing |
| D. | rolling |
| Answer» B. deep drawing | |
| 90. |
In sheet metal work the cutting force on the tool can be reduced by |
| A. | grinding the cutting edges sharp |
| B. | increasing the hardness of die |
| C. | increasing the hardness of punch |
| D. | providing “shear” on tool |
| Answer» E. | |
| 91. |
Match the component with the corresponding manufacturing process in the table below.ComponentManufacturing processPAluminum alloy piston for IC engine1Blow moldingQLow carbon steel oil pan2Powder metallurgyRTungsten carbide cuttingtool insert3Sand castingSPlastic bottle4Deep drawing |
| A. | P-3, Q-2, R-1, S-4 |
| B. | P-3, Q-4, R-2, S-1 |
| C. | P-2, Q-3, R-4, S-1 |
| D. | P-1, Q-3, R-2, S-4 |
| Answer» C. P-2, Q-3, R-4, S-1 | |
| 92. |
______ process induces compressive residual stresses on a component to nullify the residual stresses within a steel structure. |
| A. | Welding |
| B. | Heat treatment |
| C. | Brazing |
| D. | Shot peening |
| Answer» E. | |
| 93. |
In open-die forging, disc of diameter 200 mm and height 60 mm is compressed without any barreling effect. The final diameter of the disc is 400 mm. The true strain is |
| A. | 1.386 |
| B. | -1.686 |
| C. | -1.386 |
| D. | 0.602 |
| Answer» D. 0.602 | |
| 94. |
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. | 0 |
| B. | 2.07 |
| C. | 20.7 |
| D. | 41.4 |
| Answer» E. | |
| 95. |
In _____ process, the cross-section of the bar is increased at the cost of reducing its length. |
| A. | Drawing down |
| B. | Spinning |
| C. | Upsetting |
| D. | Reaming |
| Answer» D. Reaming | |
| 96. |
In wire-drawing operation, the maximum reduction per pass for perfectly plastic material in ideal condition is |
| A. | 68% |
| B. | 63% |
| C. | 58% |
| D. | 50% |
| Answer» C. 58% | |
| 97. |
In powder metallurgy, the process ‘atomization’ refers to a method of |
| A. | Producing powders |
| B. | Compaction of powders |
| C. | Sintering of powder compacts |
| D. | Blending of metal powders |
| Answer» B. Compaction of powders | |
| 98. |
In deep drawing of sheets the limiting draw ratio depends on |
| A. | percentage of elongation of sheet metal |
| B. | yield strength of sheet metal |
| C. | types of press used |
| D. | thickness of sheet metal |
| Answer» C. types of press used | |
| 99. |
Crank shafts are generally |
| A. | Die-cast |
| B. | Forged |
| C. | Sand cast |
| D. | Turned from bar stock |
| Answer» C. Sand cast | |
| 100. |
A solid aluminium cylinder is forged between two frictionless flat dies increasing diameter twice. The percentage change in length from original one will be |
| A. | 50 percent |
| B. | 75 percent |
| C. | 25 percent |
| D. | -75 percent |
| Answer» E. | |