McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
| 501. |
In most high speed milling cutters, positive radial rake angle is |
| A. | 10 - 15? |
| B. | Less than 50? |
| C. | 15 - 25? |
| D. | 25 - 35? |
| E. | 5 - 10? |
| Answer» A. 10 - 15? | |
| 502. |
A feeder gauge is used to check |
| A. | Screw pitch |
| B. | Surface roughness |
| C. | Diameter of round objects |
| D. | Unsymmetrical shape |
| E. | Thickness of a clearance |
| Answer» E. Thickness of a clearance | |
| 503. |
Surface finish of a casting is affected by |
| A. | fineness of sand |
| B. | pattern finish |
| C. | mould dressings |
| D. | All of the above |
| E. | Parting off |
| Answer» D. All of the above | |
| 504. |
In which of the following welding process the two pieces to be joined are over-lapped and placed between two electrodes? |
| A. | Projection welding |
| B. | Spot welding |
| C. | Seam welding |
| D. | Butt welding |
| E. | Percussion welding |
| Answer» B. Spot welding | |
| 505. |
The range of temperature for soldering process is |
| A. | 10?C to 50?C |
| B. | 400?C to 650?C |
| C. | 250?C to 400?C |
| D. | 180?C to 250?C |
| E. | 50?C to 100?C |
| Answer» D. 180?C to 250?C | |
| 506. |
The equipment used in pit for supply of air is |
| A. | Centrifugal blower |
| B. | Fan |
| C. | Hand blower |
| D. | Reciprocating air compressor |
| E. | Air cylinder |
| Answer» A. Centrifugal blower | |
| 507. |
Material used for surface plate in fitting shop is |
| A. | Mild steel |
| C. | Parting off |
| D. | Cast iron |
| E. | Cast steel |
| Answer» D. Cast iron | |
| 508. |
During ultrasonic machining the metal removal is effected by |
| A. | High frequency sound waves |
| B. | High frequency eddy currents |
| C. | Rubbing action between tool and work piece |
| D. | Hammering action of abrasive particles |
| E. | All of the above |
| Answer» D. Hammering action of abrasive particles | |
| 509. |
Solid punches are used for making holes having diameter equal to |
| A. | Parting off |
| B. | (2.5 - 10) mm |
| C. | (4 - 6) mm |
| E. | (1 - 3) mm |
| Answer» B. (2.5 - 10) mm | |
| 510. |
During arc welding the welding speed is too low, it is likely to result in |
| A. | Excessive pilling up of weld metal |
| B. | Overlapping without penetration edges |
| C. | Wastage of electrode material |
| D. | All of the above |
| E. | None of the above |
| Answer» D. All of the above | |
| 511. |
In arc welding as the thickness of the material to be welded increases, the welding current requirement |
| A. | Decreases |
| B. | 8 mm |
| C. | Does not change |
| E. | Increases |
| Answer» E. Increases | |
| 512. |
Molasses in a foundry shop is used |
| A. | For preventing rusting of castings |
| B. | For use as a fuel in furnace |
| C. | For making moulds |
| D. | For core making |
| E. | For cleaning castings |
| Answer» D. For core making | |
| 513. |
Prescribed maximum reading distance for a 100 mm dial is generally |
| A. | 1.5 - 2.0 m |
| B. | 4 - 5 m |
| C. | 2.5 - 3 m |
| D. | 1 - 1.5 m |
| E. | 1 m |
| Answer» C. 2.5 - 3 m | |
| 514. |
In plasma arc machining the achievable tolerances are nearly |
| A. | 0.01 |
| B. | 1 |
| C. | 25 |
| D. | 250 |
| E. | 0.1 |
| Answer» D. 250 | |
| 515. |
Which of the following material is cut at the highest cutting speed? |
| A. | Copper |
| B. | Alloy steel |
| C. | Brass |
| D. | Cast iron |
| E. | High carbon steel |
| Answer» C. Brass | |
| 516. |
Weld spatter defect in welding is generally the result of |
| A. | Using too high welding current |
| B. | Using too low welding current |
| C. | Low voltage |
| D. | High voltage |
| E. | None of the above |
| Answer» A. Using too high welding current | |
| 517. |
A 30 ton press means |
| A. | The weight of die is 30 tons |
| B. | The quantity of work produced in 8 hours will be 30 tons |
| C. | The flywheel of the press weighs 30 tons |
| D. | Gross weight of the press is 30 tons |
| E. | The pressure exerted by slide is 30 tons |
| Answer» E. The pressure exerted by slide is 30 tons | |
| 518. |
For drills having diameter upto 12.7 mm. |
| A. | Parallel shank is provided |
| B. | Tapered shank is provided |
| C. | Shank may be either of (A) or (B) |
| E. | Bell metal |
| Answer» A. Parallel shank is provided | |
| 519. |
The machining allowance provided on patterns depends on |
| A. | The material of the casting |
| B. | Size and shape of casting |
| C. | The material of the pattern |
| D. | The composition of moulding sand |
| E. | Temperature of molten material |
| Answer» B. Size and shape of casting | |
| 520. |
For the same capacity which of the following process has the lowest capital cost? |
| A. | Abrasive jet machining |
| B. | Chemical machining |
| C. | Electron jet machining |
| D. | Abrasive jet machining |
| E. | Electro chemical machining |
| Answer» D. Abrasive jet machining | |
| 521. |
For centreless grinding the surface speed is |
| A. | 1200 to 1500 metres per minute |
| B. | 600 to 900 metres per minute |
| C. | 500 to 600 metres per minute |
| D. | 1500 to 1800 metres per minute |
| E. | Parting off |
| Answer» D. 1500 to 1800 metres per minute | |
| 522. |
The rating of solder iron normally used for electronics work is |
| A. | 1 kW to 2 kW |
| B. | 750 to 1000 watts |
| C. | 500 to 750 watts |
| D. | 250 to 500 watts |
| E. | 50 to 100 watts |
| Answer» E. 50 to 100 watts | |
| 523. |
The process of bringing out the lustre of metal usually by the use of cloth wheels is known as |
| A. | Finishing |
| B. | Buffing |
| C. | Deburring |
| D. | Burnishing |
| E. | Carmetting |
| Answer» B. Buffing | |
| 524. |
During soldering |
| A. | Borax is used a flux |
| B. | Solder iron bit is red hot |
| C. | Metal is heated from top as well as bottom |
| D. | Arc is produced between solder iron and metal to be soldered |
| E. | Joint area must be clean and close fitting |
| Answer» E. Joint area must be clean and close fitting | |
| 525. |
An optical gauge works on the principle of |
| A. | Dispersion of light rays |
| B. | Polarisation of light rays |
| C. | Interference of light rays |
| D. | Reflection of light rays |
| E. | Refraction of light rays |
| Answer» C. Interference of light rays | |
| 526. |
Antioch is |
| A. | A soft soldering process |
| B. | A process for making porous moulds |
| C. | An instrument for measurement of porosity of sand |
| D. | A process for removal of excess solder from joints |
| E. | A hand tool used for repairing moulds |
| Answer» D. A process for removal of excess solder from joints | |
| 527. |
A gate is the |
| A. | Vent hole to allow for the hot gases to escape |
| B. | Channel for the flow of excess molten material |
| C. | Passage through which metal rises when the mould is filled |
| D. | Passage through which metal is poured into the mould |
| E. | Passage that finally leads molten metal from the runner into the mould cavity |
| Answer» E. Passage that finally leads molten metal from the runner into the mould cavity | |
| 528. |
Shrinkage of cast iron on solidification is nearly |
| A. | 1% |
| B. | 13% |
| C. | Parting off |
| D. | 5% |
| E. | 6.50% |
| Answer» A. 1% | |
| 529. |
Machinability is affected by |
| A. | tool geometry and material |
| B. | cutting fluids |
| C. | regidity of tool and machine |
| D. | All of the above |
| E. | Parting off |
| Answer» D. All of the above | |
| 530. |
Two 3 mm thick MS sheets are to be welded. Electrodes of 16, 12, 10 Nos, are available which one would you choose. |
| A. | 16 |
| B. | 12 |
| C. | 10 |
| D. | Any of the above |
| E. | None of the above |
| Answer» C. 10 | |
| 531. |
In electro chemical machining the metal is removed by |
| A. | Molecular transfer |
| B. | Ionic bombardment |
| C. | Collimated light rays |
| D. | Ultraviolet rays |
| E. | Dissolution in electrolyte solution |
| Answer» E. Dissolution in electrolyte solution | |
| 532. |
The property of sand due to which it clings to the sides of a moulding box, is called |
| A. | permeability |
| B. | adhesiveness |
| C. | electron affinity |
| D. | cohesiveness |
| E. | Parting off |
| Answer» B. adhesiveness | |
| 533. |
Cutting speed in turning operation for aluminium is |
| A. | 30 m/min |
| B. | 15 m/min |
| C. | 200 m/min |
| D. | 400 m/min |
| E. | 1000 m/min |
| Answer» C. 200 m/min | |
| 534. |
In a 32A 49-H 8V BE grinding wheel the grit size is represented by |
| A. | H |
| B. | 8 |
| C. | 46 |
| D. | BE |
| E. | 32 |
| Answer» C. 46 | |
| 535. |
In theory of metal cutting the shear plane angle is the angle between |
| A. | Shear plane and tool axis |
| B. | Shear plane and job surface |
| C. | Shear plane and tool surface |
| D. | Shear plane and horizontal plane |
| E. | Shear plane and verticalplane |
| Answer» B. Shear plane and job surface | |
| 536. |
Load cells are used |
| A. | For the measurement of weight |
| B. | For pile driving |
| C. | For the measurement of strain |
| D. | For the measurement of stress |
| E. | For the measurement bearing capacity of soils |
| Answer» A. For the measurement of weight | |
| 537. |
A sinebar is used to measure |
| A. | Surface roughness |
| B. | Gear profiles |
| C. | Internal tapers |
| D. | External tapers |
| E. | All of the above |
| Answer» D. External tapers | |
| 538. |
In a power hacksaw machine blade the number of teeth per inch are generally |
| A. | 10 -- 12 |
| B. | 4 -- 6 |
| C. | 20 -- 24 |
| D. | 12 -- 20 |
| E. | 24 -- 32 |
| Answer» B. 4 -- 6 | |
| 539. |
Shanks of taper drills are provided standard taper known as |
| A. | Jarno and Reed taper |
| B. | Morse taper |
| C. | Brown and Sharpe taper |
| D. | Chapman taper |
| E. | Sellers taper |
| Answer» B. Morse taper | |
| 540. |
A step cone pulley is provided on a lathe to |
| A. | To reverse the spindle rotation |
| B. | To drive the lead screw |
| C. | For taper turning |
| D. | Reduce power consumption |
| E. | To change spindle speeds |
| Answer» E. To change spindle speeds | |
| 541. |
Usual thickness of a hacksaw blade is |
| A. | 1 mm |
| B. | Parting off |
| C. | 0.7 mm |
| E. | 0.4 mm |
| Answer» C. 0.7 mm | |
| 542. |
For ultrasonic welding the thickness of metal is usually restricted to |
| A. | 15 mm |
| B. | 10 mm |
| C. | 25 mm |
| D. | 6 mm |
| E. | 3 mm |
| Answer» E. 3 mm | |
| 543. |
Lathe bed is usually made of |
| A. | Cast iron |
| B. | Satellite |
| C. | Alloy steel |
| D. | Mild steel |
| E. | High speed steel |
| Answer» A. Cast iron | |
| 544. |
Plate liners used between the vice-jaw and the work piece are made of |
| A. | Copper or Tin |
| B. | Mild steel |
| C. | Parting off |
| E. | Hard steel |
| Answer» A. Copper or Tin | |
| 545. |
In case of grey cast iron the volumetric shrinkage is around |
| A. | 15% |
| B. | 2% |
| C. | 10% |
| D. | 25% |
| E. | 20% |
| Answer» B. 2% | |
| 546. |
For the soldering of galvanized iron the flux used is |
| A. | Hydrochloric acid |
| B. | Zinc oxide |
| C. | Muriatic acid |
| D. | Ammonium chloride |
| E. | None of the above |
| Answer» C. Muriatic acid | |
| 547. |
Automobile gears are generally manufactured by |
| A. | Extrusion |
| B. | Die casting |
| C. | Stamping |
| D. | Rolling |
| E. | Hobbing |
| Answer» E. Hobbing | |
| 548. |
Which is not a part of shaper? |
| A. | Vernier caliper |
| B. | Table |
| C. | Cross slide |
| D. | Ram |
| E. | Tool head |
| Answer» C. Cross slide | |
| 549. |
A bleed type relay is generally used in |
| A. | Pneumatic systems |
| B. | Electrical systems |
| C. | Electronic systems |
| D. | Mechanical systems |
| E. | None of the above |
| Answer» A. Pneumatic systems | |
| 550. |
For aluminum casting to be turned on a lathe, which chuck would be preferred? |
| A. | Four jaw independent chuck |
| B. | Pneumatic chuck |
| C. | Collet chuck |
| D. | Three jaw self-centring chuck |
| E. | Face plane |
| Answer» A. Four jaw independent chuck | |
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