McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
| 51. |
Which of the following is an inert gas? |
| A. | Carbondioxide |
| B. | Carbon monoxide |
| C. | Nitrogen |
| D. | Argon |
| E. | All of the above |
| Answer» D. Argon | |
| 52. |
In lathe machine the chasing dial is used during |
| A. | Taper turning |
| B. | Drilling |
| C. | Parting off |
| D. | Thread cutting |
| E. | Knurling |
| Answer» D. Thread cutting | |
| 53. |
The depth of cut depends on the |
| A. | curring speed |
| B. | rigidity of machine tool |
| C. | tool material |
| D. | all of the above |
| E. | Parting off |
| Answer» D. all of the above | |
| 54. |
Which of the following is a gear finishing operation? |
| A. | Gear burnishing |
| B. | Phosphate coating |
| C. | Gear lapping |
| D. | All of the above |
| E. | Parting off |
| Answer» D. All of the above | |
| 55. |
While cutting with a hacksaw, the number of teeth contacting the job should be |
| A. | More than one |
| B. | Only one |
| C. | Any of (A) or (B) |
| E. | Parting off |
| Answer» A. More than one | |
| 56. |
Which one of the following is not included in the combinations set? |
| A. | A centre head |
| B. | A protector |
| C. | Square |
| D. | A rule |
| E. | Short rule |
| Answer» E. Short rule | |
| 57. |
Choose the incorrect statement. The mechanism of tool wear is |
| A. | oxidation |
| B. | reduction |
| C. | diffusion |
| D. | None of the above |
| E. | Parting off |
| Answer» B. reduction | |
| 58. |
Discontinuous type chips are generally produced in |
| A. | Alloy steels |
| B. | Cast iron |
| C. | Aluminium |
| D. | Duralumin |
| E. | Mild steel |
| Answer» B. Cast iron | |
| 59. |
Yellow colour on a pattern indicates |
| A. | Seat for loose core prints |
| B. | Surface to be left unmachined |
| C. | Surface to be machined |
| D. | Fillets |
| E. | Core prints |
| Answer» C. Surface to be machined | |
| 60. |
Taper shank on drills is provided for |
| A. | Use on tapered surfaces |
| B. | Eye |
| C. | Quick intersection in spindle |
| D. | None of these |
| E. | Drilling taper holes |
| Answer» C. Quick intersection in spindle | |
| 61. |
Coated tools are good at |
| A. | reducing machining cost |
| B. | increasing surface finish on scoled surfaces |
| C. | reducing diffusion wear |
| D. | None of the above |
| E. | Carmetting |
| Answer» C. reducing diffusion wear | |
| 62. |
Noise level in case of an aircraft is |
| A. | In the range of 80 - 110 db |
| B. | Always more than 100 db |
| C. | Generally less than 100 db |
| D. | In the range of 60 - 80 db |
| E. | Generally more than 100 db |
| Answer» B. Always more than 100 db | |
| 63. |
A process of zinc diffusion is known as |
| A. | Brazing |
| B. | Anodising |
| C. | Sintering |
| D. | Sherardizing |
| E. | Metallizing |
| Answer» D. Sherardizing | |
| 64. |
Which of the following can be used to produce laser? |
| A. | Diamond |
| B. | Gold |
| C. | Platinum |
| D. | Emerald |
| E. | Ruby |
| Answer» E. Ruby | |
| 65. |
The accuracy of a limit gauge can be checked by |
| A. | Vernier caliper |
| B. | Micrometer |
| C. | Slip gauge |
| D. | Sine bar |
| E. | Any of the above |
| Answer» C. Slip gauge | |
| 66. |
The tool used for grooving a seam is called |
| A. | Parting off |
| B. | Breasing stake |
| C. | Rivet set |
| D. | Groover |
| Answer» D. Groover | |
| 67. |
The tool may fail suddenly because of |
| A. | crater wear |
| B. | both crater and flank wear |
| C. | spalling |
| D. | Parting off |
| E. | flank wear |
| Answer» C. spalling | |
| 68. |
Knurling is an operation |
| A. | Of cutting smooth collars |
| B. | Of under cutting |
| C. | Done prior to screw cutting |
| D. | Of generally roughing the surface for hand grip |
| E. | Done without use of coolant |
| Answer» D. Of generally roughing the surface for hand grip | |
| 69. |
Which of the following material has maximum shrinkage during solidification? |
| A. | Parting off |
| B. | Copper |
| C. | Aluminium |
| D. | Steel |
| E. | Cast iron |
| Answer» C. Aluminium | |
| 70. |
Which of the following process is preferred for cutting and welding of nonferrous metals? |
| A. | Submerged arc welding |
| B. | Inert gas arc welding |
| C. | MIG welding |
| D. | DC arc welding |
| E. | None of the above |
| Answer» B. Inert gas arc welding | |
| 71. |
The riser in a mould should be located in such a way so that |
| A. | it touches all parts of the casting |
| B. | it is first to receive the molten metal |
| C. | Parting off |
| D. | it is last to solidify |
| E. | it is first to solidify |
| Answer» D. it is last to solidify | |
| 72. |
In a drilling operation |
| A. | Torque is equal to the axial force |
| B. | Torque is more than the axial force |
| C. | None of above |
| D. | Torque is half the axial force |
| E. | Torque is less than the axial force |
| Answer» D. Torque is half the axial force | |
| 73. |
Poor fusion in a welded joint may be due to |
| A. | Lack of flux |
| B. | Improper current |
| C. | High welding speed |
| D. | Dirty metal surface |
| E. | None of the above |
| Answer» B. Improper current | |
| 74. |
Merchant's machinability constant is |
| A. | 2 ? - ? - ? |
| B. | 500 tons to 1000 tons |
| C. | 2 ? - ? + ? |
| D. | ? + ? - ? |
| E. | 2 ? + ? - ? |
| Answer» E. 2 ? + ? - ? | |
| 75. |
Type of gears used in electric switch gear is |
| A. | Bevel gears |
| B. | Herringbone gears |
| C. | Gears are not used in switch gear |
| D. | Helical gears |
| E. | Spiral gears |
| Answer» C. Gears are not used in switch gear | |
| 76. |
The power consumption in laser beam machining is of the order of |
| A. | 2 kW/m3/min |
| B. | 270 kW/m3/min |
| C. | 2700 kW/m3/min |
| D. | 5000 kW/m3/min |
| E. | 27 kW/m3/min |
| Answer» C. 2700 kW/m3/min | |
| 77. |
A foil is |
| A. | Same as sheet |
| B. | Same as strip |
| C. | A cold rolled sheet |
| D. | A thin strip with maximum width 300 mm and a maximum thickness of 1.5 mm |
| E. | None of the above |
| Answer» D. A thin strip with maximum width 300 mm and a maximum thickness of 1.5 mm | |
| 78. |
Vertical centrifugal castings as compared to horizontal centrifugal castings are spun at |
| A. | Lower speeds |
| B. | Higher speeds |
| C. | Same speed |
| D. | Varying speeds |
| E. | None of the above |
| Answer» B. Higher speeds | |
| 79. |
For a peripheral speed of 35 m/s, a grinding wheel of 800 mm diameter must rotate at |
| A. | 1600 rpm |
| B. | 835 rpm |
| C. | 435 rpm |
| D. | 60 rpm |
| E. | 85 rpm |
| Answer» B. 835 rpm | |
| 80. |
In a lathe gear box if first four consecutive speed are 19, 30, 47, 74 rpm, the next speed would be |
| A. | 116 rpm |
| B. | 104 rpm |
| C. | 111 rpm |
| D. | 93 rpm |
| E. | 101 rpm |
| Answer» A. 116 rpm | |
| 81. |
EDM is generally preferred for |
| A. | Hard materials |
| B. | Cast materials |
| C. | Non-metallic compounds |
| D. | Non-ferrous materials |
| E. | Polymers |
| Answer» A. Hard materials | |
| 82. |
Grey iron is usually welded by |
| A. | Resistance welding |
| B. | Arc welding |
| C. | TIG welding |
| D. | Gas welding |
| E. | MIG welding |
| Answer» D. Gas welding | |
| 83. |
The machine allowance on castings does depend on |
| A. | Size of the casting |
| B. | Shape of the casting |
| C. | Temperature of molten material |
| D. | All of the above |
| E. | None of the above |
| Answer» C. Temperature of molten material | |
| 84. |
A strip is |
| A. | A section other than rectangular |
| B. | A sheet less than 6 mm in thickness and 300 mm in width |
| C. | A cold rolled sheet |
| D. | Same as sheet |
| E. | Same as plate |
| Answer» B. A sheet less than 6 mm in thickness and 300 mm in width | |
| 85. |
On a die accurate holes are to be drilled. Which machine would you prefer for this operation? |
| A. | Parting off |
| B. | Radial drilling machine |
| C. | Portable drilling machine |
| D. | Jig boring machine |
| E. | Multi-pindle drilling machine |
| Answer» D. Jig boring machine | |
| 86. |
Which one of the following is used for thermocouple junctions? |
| A. | Muntz metal |
| B. | Elinvar |
| C. | Manganin |
| D. | Duralumin |
| E. | Nichrome |
| Answer» C. Manganin | |
| 87. |
The property due to which sand grains stick together is known as |
| A. | adhesiveness |
| B. | Parting off |
| C. | permeability |
| D. | cohesiveness |
| E. | plasticity |
| Answer» D. cohesiveness | |
| 88. |
In case of very hard surfaces the Brinell Hardness test method fails to give reliable results because |
| A. | Ball does not force into the metal |
| B. | Ball deforms on very hard surfaces |
| C. | Ball slips along the surface |
| D. | It is generally not desired to use this method in such cases |
| E. | None of the above |
| Answer» B. Ball deforms on very hard surfaces | |
| 89. |
Shot blasting is |
| A. | Process of cleaning moulding sand |
| B. | Process of cleaning spherical objects only |
| C. | Process of supplying blast of hot air to cupola |
| D. | Process of cleaning castings |
| E. | Process of cleaning core sand |
| Answer» D. Process of cleaning castings | |
| 90. |
Which of the following source for laser beam can give the highest power density (W/mm2)? |
| A. | Laser continuous |
| B. | Plasma arc |
| C. | Laser pulsed |
| D. | All have the same power density |
| E. | Electron beam |
| Answer» C. Laser pulsed | |
| 91. |
A flycutter is used on |
| A. | Planer |
| B. | Slotter |
| C. | Shaper |
| D. | Milling machine |
| E. | Lathe |
| Answer» D. Milling machine | |
| 92. |
High rate of oscillation of tools in ultrasonic machining is produced by |
| A. | Pneumatic generator |
| B. | Explosives |
| C. | D.C. motor |
| D. | Oscillator |
| E. | A.C. motor |
| Answer» D. Oscillator | |
| 93. |
Slip gauges are made of |
| A. | Aluminium |
| B. | Copper |
| C. | Alloy steel |
| D. | Stainless steel |
| E. | Cast iron |
| Answer» C. Alloy steel | |
| 94. |
A third flask sometimes used between cope and drag is called |
| A. | Core |
| B. | Middle |
| C. | Check |
| D. | Riddle |
| E. | Fillet |
| Answer» C. Check | |
| 95. |
Which of the following is a ferrous cutting tool? |
| A. | Diamond |
| B. | Cast carbides |
| C. | HSS |
| D. | Ceramics |
| E. | Parting off |
| Answer» C. HSS | |
| 96. |
Gear cutter No. 1 for cutting gears on milling machine is used for |
| A. | 17 to 20 teeth |
| B. | 135 to 150 teeth |
| C. | 12 to 13 teeth |
| D. | Racks only |
| E. | 55 to 120 teeth |
| Answer» B. 135 to 150 teeth | |
| 97. |
DIN specifications have been developed in |
| A. | Austria |
| B. | Russia |
| C. | America |
| D. | Germany |
| E. | England |
| Answer» D. Germany | |
| 98. |
A steady rest is used |
| A. | During taper turning |
| B. | During threading operation |
| C. | For supporting the bed |
| D. | While cutting heavy and log jobs |
| E. | During finishing operation |
| Answer» D. While cutting heavy and log jobs | |
| 99. |
During electron beam welding the vacuum is of the order of |
| A. | 10-5 torr |
| B. | 1 torr |
| C. | 10-3 torr |
| D. | 10-4 torr |
| E. | 10-2 torr |
| Answer» A. 10-5 torr | |
| 100. |
Which one does not fit with rest in the following? |
| A. | Jaw chuck |
| B. | Drill |
| C. | Tapping |
| D. | Reamer |
| E. | Pipe cutter |
| Answer» E. Pipe cutter | |
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