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.
| 51. |
When 3-2-1 principle is used to support and locate a three dimensional work-piece during machining, the number of degrees of freedom that are restricted is |
| A. | 7 |
| B. | 8 |
| C. | 9 |
| D. | 10 |
| Answer» D. 10 | |
| 52. |
When the temperature of a solid metal increases, |
| A. | Strength of the metal decreases but ductility increases |
| B. | Both strength and ductility of the metal decreases |
| C. | Both strength and ductility of the metal increases |
| D. | Strength of the metal increases but ductility decreases |
| Answer» B. Both strength and ductility of the metal decreases | |
| 53. |
NC contouring is an example of |
| A. | Continuous path positioning |
| B. | Point-to-point positioning |
| C. | Absolute positioning |
| D. | Incremental positioning |
| Answer» B. Point-to-point positioning | |
| 54. |
A ring gauge is used to measure |
| A. | Outside diameter but not roundness |
| B. | Roundness but not outside diameter |
| C. | Both outside diameter and roundness |
| D. | Only external threads |
| Answer» B. Roundness but not outside diameter | |
| 55. |
Which type of motor is not used in axis or spindle drives of CNC machine tools? |
| A. | Induction motor |
| B. | DC servo motor |
| C. | Stepper motor |
| D. | Linear servo motor |
| Answer» D. Linear servo motor | |
| 56. |
The main purpose of spheroidising treatment is to improve |
| A. | Hardenability of low carbon steels |
| B. | Machinability of low carbon steels |
| C. | Hardenability of high carbon steels |
| D. | Machinability of high carbon steels |
| Answer» E. | |
| 57. |
The effective number of lattice points in the unit cell of simple cubic, body centered cubic, and face centered cubic space lattices, respectively, are |
| A. | 1, 2, 2 |
| B. | 1, 2, 4 |
| C. | 2, 3, 4 |
| D. | 2, 4, 4 |
| Answer» C. 2, 3, 4 | |
| 58. |
Friction at the tool-chip interface can be reduced by |
| A. | Decreasing the rake angle |
| B. | Increasing the depth of cut |
| C. | Decreasing the cutting speed |
| D. | Increasing the cutting speed |
| Answer» E. | |
| 59. |
The material property which depends only on the basic crystal structure is |
| A. | Fatigue strength |
| B. | Work hardening |
| C. | Fracture strength |
| D. | Elastic constant |
| Answer» D. Elastic constant | |
| 60. |
In a CNC program block, N002 GO2 G91 X40 Z40......, GO2 and G91 refer to |
| A. | Circular interpolation in counter clockwise direction and incremental dimension |
| B. | Circular interpolation in counter clockwise direction and absolute dimension |
| C. | Circular interpolation in clockwise direction and incremental dimension |
| D. | Circular interpolation in clockwise direction and absolute dimension |
| Answer» D. Circular interpolation in clockwise direction and absolute dimension | |
| 61. |
The crystal structure of austenite is |
| A. | Body centered cubic |
| B. | Base centered cubic |
| C. | Hexagonal closed packed |
| D. | Body centered tetragonal |
| Answer» C. Hexagonal closed packed | |
| 62. |
As tool and work are not in contact in EDM process |
| A. | No relative motion occurs between them |
| B. | No wear of tool occurs |
| C. | No power is consumed during metal cutting |
| D. | No force between tool and work occurs |
| Answer» E. | |
| 63. |
In orthogonal turning of a low carbon steel bar of diameter 150 mm with uncoated carbide tool, the cutting velocity is 90 m/min. The feed is 0.24 mm/rev and the depth of cut is 2 mm. The chip thickness obtained is 0.48 mm. If the orthogonal rake angle is zero and the principle cutting edge angle is 90 , the shear angle in degree is |
| A. | 20.56 |
| B. | 26.56 |
| C. | 30.56 |
| D. | 36.56 |
| Answer» C. 30.56 | |
| 64. |
If a particular Fe-C alloy contains less than 0.83?rbon, it is called |
| A. | High speed steel |
| B. | Hypo eutectoid steel |
| C. | Hyper eutectoid steel |
| D. | Cast iron |
| Answer» C. Hyper eutectoid steel | |
| 65. |
Which of the following is the correct data structure for solid models? |
| A. | Solid part - faces - edges - vertices |
| B. | Solid part - edges - faces - vertices |
| C. | Vertices - edges - faces - solid parts |
| D. | Vertices - faces- edges - solid parts |
| Answer» D. Vertices - faces- edges - solid parts | |
| 66. |
For generating a Coon s surface we require |
| A. | A set of grid points on the surface |
| B. | A set of grid control points |
| C. | Four bounding curves defining the surface |
| D. | Two bounding curves and a set of grid control points |
| Answer» D. Two bounding curves and a set of grid control points | |
| 67. |
Internal gear cutting operation can be performed by |
| A. | Milling |
| B. | Shaping with rack cutter |
| C. | Shaping with pinion cutter |
| D. | Hobbing |
| Answer» D. Hobbing | |
| 68. |
If the flame of the welding torch is directed towards the progress of welding, then what will you call the welding technique? |
| A. | Forehand welding |
| B. | Flux cored ARC welding |
| C. | Electro slag welding |
| D. | Pulsed spray welding |
| Answer» B. Flux cored ARC welding | |
| 69. |
What is the type of joining process called, where the parts to be welded are kept in contact and rotated relative to each other and axial pressure is applied when the desired temperature is obtained? |
| A. | Ultrasonic welding |
| B. | Forge welding |
| C. | Electron beam welding |
| D. | Friction welding |
| Answer» E. | |
| 70. |
What is the type of welding defect caused due to poor manipulation of weld rod or a dirty joint called? |
| A. | Porosity |
| B. | Undercut |
| C. | Under fill |
| D. | Crack |
| Answer» C. Under fill | |
| 71. |
What is the type of welding defect caused due to poor deposition of weld rod is called? |
| A. | Porosity |
| B. | Undercut |
| C. | Under fill |
| D. | Crack |
| Answer» B. Undercut | |
| 72. |
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. | |
| 73. |
The cutting force in punching and blanking operations mainly depends on |
| A. | The modulus of elasticity of metal |
| B. | The shear strength of metal |
| C. | The bulk modulus of metal |
| D. | The yield strength of metal |
| Answer» C. The bulk modulus of metal | |
| 74. |
Trepanning is performed for |
| A. | Finishing a drilled hole |
| B. | Producing a large hole without drilling |
| C. | Truing a hole for alignment |
| D. | Enlarging a drilled hole |
| Answer» C. Truing a hole for alignment | |
| 75. |
Hot rolling of mild steel is carried out |
| A. | At recrystallization temperature |
| B. | Between 100 C to 150 C |
| C. | Between recrystallization temperature |
| D. | Above recrystallization temperature |
| Answer» E. | |
| 76. |
The hardness of a grinding wheel is determined by the |
| A. | Hardness of abrasive grains |
| B. | Ability of the bond to retain abrasives |
| C. | Hardness of the bond |
| D. | Ability of the grinding wheel to penetrate the work piece |
| Answer» C. Hardness of the bond | |
| 77. |
A lead-screw with half nuts in a lathe, free to rotate in both directions has |
| A. | V-threads |
| B. | Whitworth threads |
| C. | Buttress threads |
| D. | Acme threads |
| Answer» E. | |
| 78. |
Misrun is a casting defect which occurs due to |
| A. | Very high pouring temperature of the metal |
| B. | Insufficient fluidity of the molten metal |
| C. | Absorption of gases by the liquid metal |
| D. | Improper alignment of the mould flasks |
| Answer» C. Absorption of gases by the liquid metal | |
| 79. |
An expendable pattern is used in |
| A. | Slush casting |
| B. | Squeeze casting |
| C. | Centrifugal casting |
| D. | Investment casting |
| Answer» E. | |
| 80. |
Which of the following engineering materials is the most suitable candidate for hot chamber die casting? |
| A. | Low carbon steel |
| B. | Titanium |
| C. | Copper |
| D. | Tin |
| Answer» E. | |
| 81. |
Two streams of liquid metal which are not hot enough to fuse properly result into a casting defect known as |
| A. | Cold shut |
| B. | Swell |
| C. | Sand wash |
| D. | Scab |
| Answer» B. Swell | |
| 82. |
Hardness of steel greatly improves with |
| A. | Annealing |
| B. | Cyaniding |
| C. | Normalizing |
| D. | Tempering |
| Answer» C. Normalizing | |
| 83. |
In which type of welding a gas shield, a consumable electrode is used and the welding can be done in all positions. |
| A. | ARC welding |
| B. | Submerged ARC welding |
| C. | TIG welding |
| D. | MIG welding |
| Answer» E. | |
| 84. |
In a metal arc welding process, metal transfer across the arc may take place by a method of material transfer where the metal transfers across the arc is in larger drops. This is at the rate of 100 drops/sec or less, what is this known as |
| A. | Globular transfer |
| B. | Spray transfer |
| C. | GMAW practice |
| D. | Dip transfer |
| Answer» E. | |
| 85. |
The percentage of carbon that must be present in steel before it can be hardened noticeably is |
| A. | 0.20 percent |
| B. | 0.30 percent |
| C. | 0.70 percent |
| D. | 0.10 percent |
| E. | 0.05 percent |
| Answer» B. 0.30 percent | |
| 86. |
Which of the following process is used for casting ornamental objects, toys and similar articles? |
| A. | Slush casting |
| B. | Open mould casting |
| C. | Semi-centrifugal casting |
| D. | Die casting |
| E. | None of the above |
| Answer» B. Open mould casting | |
| 87. |
Which of the following materials will have highest value of contraction allowance |
| A. | Aluminium |
| B. | Brass |
| C. | Cast iron |
| D. | Malleable iron |
| E. | Bronze |
| Answer» C. Cast iron | |
| 88. |
Which of the following is always die casted? |
| A. | Rollers for bearings |
| B. | Carburettor body |
| C. | Parting off |
| D. | Pump shafts |
| E. | Balls for ball mills |
| Answer» C. Parting off | |
| 89. |
While machining copper alloys with HSS tools, the cutting speed is |
| A. | 100 to 150 m/min |
| B. | 50 to 100 m/min |
| C. | 200 to 300 m/min |
| D. | Parting off |
| E. | 20 to 30 m/min |
| Answer» D. Parting off | |
| 90. |
Which of the following drilling machine is used for mass production? |
| A. | Radial drilling machine |
| B. | Gang drilling machine |
| C. | Parting off |
| D. | Pistol drilling machine |
| E. | Bench drilling machine |
| Answer» C. Parting off | |
| 91. |
While turning which of the following material back rake angle is the largest? |
| A. | Parting off |
| B. | Hard steel |
| C. | Aluminium |
| D. | Cast iron |
| E. | Monel matal |
| Answer» D. Cast iron | |
| 92. |
A stick is |
| A. | A tool for lifting the pattern from mould |
| B. | A tool for mostening the sand |
| C. | A hand tool for repairing mould in foundry shop |
| D. | A device for measuring moisture content in foundry sand |
| E. | Automatic moulding tool |
| Answer» D. A device for measuring moisture content in foundry sand | |
| 93. |
A gold point is |
| A. | The pointed on a instrument a reading beyond which may be dangerous to system |
| B. | The pointed location spot gold plated |
| C. | The temperature of equilibrium between liquid gold and gold vapour at normal atmospheric pressure |
| D. | The temperature at which gold melts |
| E. | The temperature of equilibrium between solid gold and liquid gold at normal atmospheric pressure |
| Answer» F. | |
| 94. |
Spindle speed in a lathe for turning a 40 cm dia rod at a cutting speed of 30 m/min would be |
| A. | 100 rpm |
| B. | 336 rpm |
| C. | 238 rpm |
| D. | 468 rpm |
| E. | 206 rpm |
| Answer» D. 468 rpm | |
| 95. |
Lead and sulphur when added to low carbon steel promote |
| A. | chip breaking |
| B. | continuous chip formation |
| C. | continuous chip with built up edges |
| D. | None of the above |
| E. | Parting off |
| Answer» B. continuous chip formation | |
| 96. |
In a 48A 100-H-8-S-BE grinding wheel the type of bond used is |
| A. | Silicate |
| B. | Resinoid |
| C. | Shellac |
| D. | Vitrified |
| E. | Rubber |
| Answer» B. Resinoid | |
| 97. |
Austenitic stainless steel contain |
| A. | at least 24 percent of combined chromium and nickel |
| B. | 4 to 6 percent of chromium |
| C. | chromium which is 17 times the percentage of carbon |
| D. | None of the above |
| E. | Parting off |
| Answer» B. 4 to 6 percent of chromium | |
| 98. |
The feed depends on |
| A. | finish required |
| B. | depth of cut |
| C. | rigidity of machine |
| D. | All of the above |
| E. | Parting off |
| Answer» E. Parting off | |
| 99. |
Chromatography is |
| A. | The method of determining alloying elements in steels |
| B. | The method of analysis of flame types |
| C. | The method of determination of smoke density of exhaust gases |
| D. | The method of determining each constituent in a complex vapour or gas mixture |
| E. | The method of analysis of flame colours for temperature determination |
| Answer» E. The method of analysis of flame colours for temperature determination | |
| 100. |
Materials that produce continuous chips are |
| A. | Cast iron |
| B. | Low carbon steel |
| C. | Brass |
| D. | None of the above |
| E. | Parting off |
| Answer» C. Brass | |