McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
| 451. |
The welding of steel structures on the site of a building is done by |
| A. | Arc welding |
| B. | Spot welding |
| C. | Projection welding |
| D. | Thermit welding |
| E. | TIG welding |
| Answer» A. Arc welding | |
| 452. |
The advantage of a pneumatically operated control system is |
| A. | It can be used in hazardous atmosphere |
| B. | Simplicity of components |
| C. | Easily maintained |
| D. | Relatively inexpensive |
| E. | All of the above |
| Answer» E. All of the above | |
| 453. |
The surface speed of grinding wheel in case of centreless grinding is |
| A. | 1000 - 1500 M/min |
| B. | 15 - 75 M/min |
| C. | 1500 - 1800 M/min |
| D. | 100 - 500 M/min |
| E. | 500 - 800 M/min |
| Answer» C. 1500 - 1800 M/min | |
| 454. |
An examiner has given the following as parts of drill bit. Find which one is not correct |
| A. | Cutting edge |
| B. | Eye |
| C. | Shank |
| D. | Point |
| E. | Dead centre |
| Answer» B. Eye | |
| 455. |
A 20 number crucible |
| A. | Will have height of 20 cm |
| B. | Can take 20 cc of molten material |
| C. | Will have capacity to melt 20 kg of copper |
| D. | Will have internal diameter of 20 cm |
| E. | Can produce castings of 20 kg only |
| Answer» C. Will have capacity to melt 20 kg of copper | |
| 456. |
For the measurement of pressure corrosive and highly viscous liquids with the halp of pressure gauge |
| A. | Gauge scale is modified |
| B. | Seal pots are used |
| C. | Bourdon tube of the gauge is changed |
| D. | Necessary corrections are applied |
| E. | Pressure gauge is never used in such situations |
| Answer» B. Seal pots are used | |
| 457. |
2% Nickel in steel makes it suitable for |
| A. | Boiler plates, rivets etc |
| B. | Electronic valves |
| C. | Connecting rods |
| D. | Anti corrosion characteristics |
| E. | Turbine blade |
| Answer» A. Boiler plates, rivets etc | |
| 458. |
IS code considers how many types of steels for designating carbon content in the steel? |
| A. | 1 |
| B. | 4 |
| C. | Parting off |
| D. | 2 |
| E. | 3 |
| Answer» B. 4 | |
| 459. |
In a turning operation on a horizontal axis lathe, the forces on tool act |
| A. | only in horizontal plane in the directions of feed and cut |
| B. | only in vertical plane in the direction of feed and vertically |
| C. | only in vertical plane in the direction of feed and radially |
| D. | None of the above |
| E. | Parting off |
| Answer» B. only in vertical plane in the direction of feed and vertically | |
| 460. |
In a stationary type mechanical seal the sealing ring is generally located |
| A. | In machine housing |
| B. | Along machine shaft |
| C. | Independently |
| D. | None of the above |
| E. | None of the above |
| Answer» A. In machine housing | |
| 461. |
Gold ornaments are generally produced by |
| A. | Pressed casting |
| B. | Slush casting |
| C. | Investment casting |
| D. | Die-casting |
| E. | Centrifugal casting |
| Answer» A. Pressed casting | |
| 462. |
In manufacturing ERW tube the type of welding generally used is |
| A. | Induction welding |
| B. | Thermit welding |
| C. | Electrical resistance welding |
| D. | Gas welding |
| E. | Are welding |
| Answer» C. Electrical resistance welding | |
| 463. |
To clean a hand file |
| A. | It is rubbed on stone |
| B. | File card is used |
| C. | It is dipped in dilute acid |
| D. | It is rubbed on wood |
| E. | It is dipped in water |
| Answer» B. File card is used | |
| 464. |
During MIG welding the metal is transferred in the form of |
| A. | Metal is not transferred during MIG welding |
| B. | Solution |
| C. | Continuous flow of molten metal |
| D. | A fine spray of metal |
| E. | Electron beam |
| Answer» D. A fine spray of metal | |
| 465. |
In Rockwell test for hardness on B scale |
| A. | A diamond cone is used |
| B. | A mechanite ball is used |
| C. | A steel hammer is used |
| D. | A steel ball is used |
| E. | A plastic hammer is used |
| Answer» D. A steel ball is used | |
| 466. |
For soldering of brass and copper, the flux used is |
| A. | Zinc chloride |
| B. | Hydrochloric acid |
| C. | Cupric acid |
| D. | Ammonium chloride |
| E. | None of the above |
| Answer» A. Zinc chloride | |
| 467. |
During metal cutting operation on machine tools, the major portion of heat is carried away by |
| A. | Chip and tool have identical heat dissipation |
| B. | Chip |
| C. | Work piece |
| D. | Chip tool and work piece have identical proportion of heat dissipation |
| E. | Tool |
| Answer» B. Chip | |
| 468. |
The purpose of an automatic process control system generally is |
| A. | To automatically produce goods |
| B. | To automatically detect inferior quality goods |
| C. | To automatically process the raw materials |
| D. | To direct the forces that give stable plant and process operation by maintaining desired values of process variables or conditions |
| E. | None of the above |
| Answer» D. To direct the forces that give stable plant and process operation by maintaining desired values of process variables or conditions | |
| 469. |
Which of the following process has highest power consumption in kW/cm2/min? |
| A. | Plasma arc machining |
| B. | Electron beam machining |
| C. | Abrasive jet machining |
| D. | Electro chemical machining |
| E. | Ultrasonic machining |
| Answer» B. Electron beam machining | |
| 470. |
Cold heading is a process of |
| A. | Electro-machining process |
| B. | Explosive forming |
| C. | High energy rate forming |
| D. | Pneumatic mechanical forming |
| E. | Chipless machining |
| Answer» E. Chipless machining | |
| 471. |
For soft steel the cutting speed for lathe operations is around |
| A. | 100 m/min |
| B. | 30 m/min |
| C. | 150 m/min |
| D. | 300 m/min |
| E. | 1000 m/min |
| Answer» B. 30 m/min | |
| 472. |
In induction hardening the depth of hardening can be controlled by controlling |
| A. | voltage |
| B. | power factor |
| C. | frequency |
| D. | current |
| E. | Parting off |
| Answer» C. frequency | |
| 473. |
The surface of a slip gauge is produced by |
| A. | Milling |
| B. | Grinding |
| C. | Lapping |
| D. | Burnishing |
| E. | Any of the above |
| Answer» C. Lapping | |
| 474. |
The transmission lag in mercury thermometers is generally |
| A. | Low |
| B. | Average |
| C. | Negligible |
| D. | Very high |
| E. | High |
| Answer» A. Low | |
| 475. |
Brass is |
| A. | Copper aluminium alloy |
| B. | Copper-nickel alloy |
| C. | Copper-zinc alloy |
| D. | Copper-tin alloy |
| E. | Copper-lead alloy |
| Answer» C. Copper-zinc alloy | |
| 476. |
Photoelectric transducers are used for the measurement of any phenomenon which can be used to produce |
| A. | Variation in current |
| B. | Variation in voltage |
| C. | Variation in light intensity |
| D. | Variation in flux density |
| E. | Any of the above |
| Answer» C. Variation in light intensity | |
| 477. |
Chisels for metal cutting are |
| A. | Hardened in the middle |
| B. | Hardened at cutting edge |
| C. | Hardened all over |
| D. | Hardened at random |
| E. | Never hardened |
| Answer» C. Hardened all over | |
| 478. |
Kind of tools used to undercut corners on a job that is to be hardened and ground is |
| A. | Vee shaped tool |
| B. | Form tool |
| C. | Knurling tool |
| D. | Roundnose tool |
| E. | Parting tool |
| Answer» D. Roundnose tool | |
| 479. |
If a drill has different lengths of cutting edges |
| A. | Cutting edge will be over size |
| B. | The drilled hole will be rough |
| C. | The drilled hole will not be circular |
| D. | The drilled hole will be smooth |
| E. | Cutting edge will become blunt rapidly |
| Answer» E. Cutting edge will become blunt rapidly | |
| 480. |
Plastic gears are used in |
| A. | Toys |
| B. | Instruments |
| C. | Low load applications |
| D. | Low noise applications |
| E. | Any of the above |
| Answer» E. Any of the above | |
| 481. |
Fine sand is used for preparing the moulds for |
| A. | Symmetrical castings |
| B. | Large castings |
| C. | Small castings |
| D. | Non-ferrous castings |
| E. | Centrifugal castings |
| Answer» C. Small castings | |
| 482. |
Which one of the following measuring instruments is supposed to be most accurate? |
| A. | Micrometer |
| B. | Vernier dial gauge |
| C. | Optical projector |
| D. | Steel scale |
| E. | Vernier caliper |
| Answer» C. Optical projector | |
| 483. |
A diamond point chisel is used for |
| A. | V-shaped grooves |
| B. | Spherical surfaces |
| C. | Flat surfaces |
| D. | Convex surfaces |
| E. | Round surfaces |
| Answer» A. V-shaped grooves | |
| 484. |
Which of the following is a chipless machining process? |
| A. | Metal spinning |
| B. | Knurling |
| C. | Hobbing |
| D. | Lapping |
| E. | None of the above |
| Answer» A. Metal spinning | |
| 485. |
With HSS tools the maximum safe operating temperature is of the order of |
| A. | 200?C |
| B. | 440?C |
| C. | 640?C |
| D. | 540?C |
| E. | 340?C |
| Answer» D. 540?C | |
| 486. |
Relief angle on HSS tools usually vary from |
| A. | 11 to 15? |
| B. | 22 to 27? |
| C. | 16 to 150? |
| D. | 28 to 30? |
| E. | 3 to 10? |
| Answer» E. 3 to 10? | |
| 487. |
Spiral flutes are provided on drill bits to |
| A. | Help from the cutting edge of the drill point |
| B. | Curl the chip tightly for easier removal |
| C. | Provide passage for coolant supply |
| D. | All of the above |
| E. | None of the above |
| Answer» D. All of the above | |
| 488. |
Which one of the following is supposed to be least accurate? |
| A. | Surface plate |
| B. | Air gauge |
| C. | Optical projector |
| D. | Vernier micrometer |
| E. | Steel scale |
| Answer» E. Steel scale | |
| 489. |
Automobile gears are generally made of |
| A. | Alloy steel |
| B. | Cast iron |
| C. | Nitrided steel |
| D. | Cast steel |
| E. | Non-ferrous materials |
| Answer» A. Alloy steel | |
| 490. |
Marform is |
| A. | Is a foming process on lathe in which movement of tool is neither governed by cross slide nor by compound slide |
| B. | A work holding device in which plane of rotation can be changed while working |
| C. | A darwing process that forms metal sheet by using a movable steel punch and a rubber headed ram |
| D. | Is a forming tool and on lathe machine to generate spherical surfaces |
| E. | Is a gauge used to check regular surfaces |
| Answer» C. A darwing process that forms metal sheet by using a movable steel punch and a rubber headed ram | |
| 491. |
For aluminium, the cutting speed on lathe is around |
| A. | 150 m/min |
| B. | 300 m/min |
| C. | 100 m/min |
| D. | 1000 m/min |
| E. | 30 m/min |
| Answer» B. 300 m/min | |
| 492. |
Which of the following defect results due to mixing of two streams of molten metal that are too cold to fuse properly? |
| A. | Cold shut |
| B. | Swell |
| C. | Honey coming |
| D. | Scab |
| E. | Shrinkage |
| Answer» A. Cold shut | |
| 493. |
The range of voltage (open circuit) in are welding is generally |
| A. | 20 - 40 V |
| B. | 100 - 150 V |
| C. | 40 - 90 V |
| D. | 150 - 230 V |
| E. | 400 - 440 V |
| Answer» C. 40 - 90 V | |
| 494. |
A Bourdon tube is generally made of |
| A. | Monel metal |
| B. | Beryllium copper alloy |
| C. | Phosphor bronze |
| D. | Stainless steel |
| E. | Any of the above |
| Answer» E. Any of the above | |
| 495. |
The chemical used in generating acetylene is |
| A. | Charcoal |
| B. | Calcium carbonate |
| C. | Calcium carbide |
| D. | Carbon |
| E. | Crushed bone |
| Answer» E. Crushed bone | |
| 496. |
Which one of the following is not a part of micrometer |
| A. | Sleeve |
| B. | Spindle |
| C. | Thimble |
| D. | Anvil |
| E. | Beam |
| Answer» E. Beam | |
| 497. |
Plug rolling is used to |
| A. | Reduce the wall thickness and increase the diameter of tubes already made |
| B. | Remove out of roundness of pipes |
| C. | Increase the wall thickness of pipes at ends |
| D. | Reduce the diameter of pipe |
| E. | Cut threads at the ends of pipes |
| Answer» A. Reduce the wall thickness and increase the diameter of tubes already made | |
| 498. |
Burr is |
| A. | Boundary between finished and unifinished portion on a work piece |
| B. | Sharp edge remaining on the metal after curring, stamping or machining |
| C. | A marking or work piece to identify for correct position on a work piece |
| D. | Burnt surface of a casting |
| E. | Unmachined portion of work piece |
| Answer» B. Sharp edge remaining on the metal after curring, stamping or machining | |
| 499. |
Which process is used for manufacturing the body of a carburettor? |
| A. | Die casting |
| B. | Fine sand casting |
| C. | Electro forming |
| D. | Sintering |
| E. | Metal spraying |
| Answer» A. Die casting | |
| 500. |
The silver point temperature is |
| A. | 760?C |
| B. | 1500.5?C |
| C. | 500?C |
| D. | 960.5?C |
| E. | 1100.5?C |
| Answer» D. 960.5?C | |
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