MCQOPTIONS
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MCQOPTIONS
This section includes 455 Mcqs, each offering curated multiple-choice questions to sharpen your Mechanical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 351. |
Rotary swaging$? |
| A. | Is extensively used for making bolts and rivets |
| B. | Is used for reducing the diameters of round bars and a tube by rotating dies which open and close rapidly on the work |
| C. | Is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface |
| D. | Consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part |
| Answer» C. Is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface | |
| 352. |
The sand used for making cores is$? |
| A. | Green sand |
| B. | Dry sand |
| C. | Loam sand |
| D. | Oil sand |
| Answer» E. | |
| 353. |
The centrifugal casting method, is used for casting articles of$? |
| A. | Symmetrical shape about vertical axis |
| B. | Symmetrical shape about horizontal axis |
| C. | Irregular shape |
| D. | Nonferrous metal only |
| Answer» C. Irregular shape | |
| 354. |
In arc welding, the temperature of heat produced by the electric arc is of the order of$? |
| A. | 3000°C to 4000°C |
| B. | 4000°C to 5000°C |
| C. | 5000°C to 6000°C |
| D. | 6000°C to 7000°C |
| Answer» E. | |
| 355. |
The mode of deformation of the metal during spinning is$? |
| A. | Bending |
| B. | Stretching |
| C. | Rolling and stretching |
| D. | Bending and stretching |
| Answer» E. | |
| 356. |
The chisel used for cutting key ways is$? |
| A. | Flat chisel |
| B. | Cape chisel |
| C. | Round nose chisel |
| D. | Diamond pointed chisel |
| Answer» C. Round nose chisel | |
| 357. |
Shift is a casting defect which$? |
| A. | Results in a mismatching of the top and bottom parts of a casting |
| B. | Results in general enlargement of a casting |
| C. | Occurs near the ingates as rough lumps on the surface of a casting |
| D. | Occurs as sand patches on the upper surface of a casting |
| Answer» B. Results in general enlargement of a casting | |
| 358. |
The shrinkage allowance for cast iron pattern is$? |
| A. | 10 mm/m |
| B. | 16 mm/m |
| C. | 20 mm/m |
| D. | 26 mm/m |
| Answer» B. 16 mm/m | |
| 359. |
In die casting, machining allowance is$? |
| A. | Small |
| B. | Large |
| C. | Very large |
| D. | Not provided |
| Answer» E. | |
| 360. |
In a unilateral system of tolerance, the tolerance is allowed on$? |
| A. | One side of the actual size |
| B. | One side of the nominal size |
| C. | Both sides of the actual size |
| D. | Both sides of the nominal size |
| Answer» C. Both sides of the actual size | |
| 361. |
A mortise gauge is a$? |
| A. | Striking tool |
| B. | Planing tool |
| C. | Boring tool |
| D. | Marking tool |
| Answer» E. | |
| 362. |
In ________ welding, the weld may be made either from left to right or from right to left.$? |
| A. | Forehand |
| B. | Backhand |
| C. | Vertical |
| D. | None of these |
| Answer» D. None of these | |
| 363. |
A pattern maker's shrinkage rule considers$? |
| A. | All pattern allowances |
| B. | Only shrinkage allowance |
| C. | All materials to be cast |
| D. | All materials of the pattern |
| Answer» C. All materials to be cast | |
| 364. |
Cold working of metal increases$? |
| A. | Tensile strength |
| B. | Yield strength |
| C. | Hardness |
| D. | All of these |
| Answer» E. | |
| 365. |
The tolerance produced by shell moulding process of casting is$? |
| A. | +0.05 mm |
| B. | ±0.2 mm |
| C. | +0.5 mm |
| D. | ±1 mm |
| Answer» C. +0.5 mm | |
| 366. |
According to Indian standards, the total numbers of tolerance grades are$? |
| A. | 8 |
| B. | 12 |
| C. | 18 |
| D. | 20 |
| Answer» D. 20 | |
| 367. |
In spot welding, the distance between the nearest edge of the plate and centre of weld should be equal to$? |
| A. | d |
| B. | 1.5 d |
| C. | 3d |
| D. | 6d |
| Answer» C. 3d | |
| 368. |
In a compound die$? |
| A. | Only one operation is performed at each stroke of the ram |
| B. | Two or more operations are performed simultaneously at the single stroke of the ram |
| C. | Two or more cutting operations are performed at one station of the press in every stroke of the ram |
| D. | Both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram |
| Answer» D. Both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram | |
| 369. |
The cold chisels are made by$? |
| A. | Drawing |
| B. | Rolling |
| C. | Piercing |
| D. | Forging |
| Answer» E. | |
| 370. |
In permanent mould casting method$? |
| A. | Molten metal is poured in a metallic mould, retained in the mould long enough for the outer skin to solidify and finally mould is turned over to remove molten metal still in molten condition |
| B. | Molten metal is poured and allowed to solidify while the mould is revolving |
| C. | Molten metal is forced into mould under high pressure |
| D. | None of the above |
| Answer» E. | |
| 371. |
The hot working of metals is carried out$? |
| A. | At the recrystallisation temperature |
| B. | Below the recrystallisation temperature |
| C. | Above the recrystallisation temperature |
| D. | At any temperature |
| Answer» D. At any temperature | |
| 372. |
The cold chisels are made from$? |
| A. | Cast iron |
| B. | Mild steel |
| C. | High speed steel |
| D. | Cast tool steel |
| Answer» E. | |
| 373. |
In forehand welding, the angle between the welding rod and the work is kept as$? |
| A. | 30°-40° |
| B. | 40°-50° |
| C. | 50°-60° |
| D. | 60°-70° |
| Answer» B. 40¬¨‚àû-50¬¨‚àû | |
| 374. |
Carburising flame is used to weld$? |
| A. | Steel, cast iron, copper, aluminium etc |
| B. | Brass and bronze |
| C. | Hard surfacing materials such as stellite |
| D. | All of these |
| Answer» D. All of these | |
| 375. |
Most of the oxyacetylene welding is done with$? |
| A. | Neutral flame |
| B. | Oxidizing flame |
| C. | Carburising flame |
| D. | All of these |
| Answer» B. Oxidizing flame | |
| 376. |
The hot working of metals is carried out? |
| A. | At the recrystallisation temperature |
| B. | Below the recrystallisation temperature |
| C. | Above the recrystallisation temperature |
| D. | At any temperature |
| Answer» D. At any temperature | |
| 377. |
In spot welding, the distance between the nearest edge of the plate and centre of weld should be equal to? |
| A. | d |
| B. | 1.5 d |
| C. | 3d |
| D. | 6d |
| Answer» C. 3d | |
| 378. |
In a compound die? |
| A. | Only one operation is performed at each stroke of the ram |
| B. | Two or more operations are performed simultaneously at the single stroke of the ram |
| C. | Two or more cutting operations are performed at one station of the press in every stroke of the ram |
| D. | Both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram |
| Answer» D. Both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram | |
| 379. |
The cold chisels are made by? |
| A. | Drawing |
| B. | Rolling |
| C. | Piercing |
| D. | Forging |
| Answer» E. | |
| 380. |
In permanent mould casting method? |
| A. | Molten metal is poured in a metallic mould, retained in the mould long enough for the outer skin to solidify and finally mould is turned over to remove molten metal still in molten condition |
| B. | Molten metal is poured and allowed to solidify while the mould is revolving |
| C. | Molten metal is forced into mould under high pressure |
| D. | None of the above |
| Answer» E. | |
| 381. |
Carburising flame is used to weld? |
| A. | Steel, cast iron, copper, aluminium etc |
| B. | Brass and bronze |
| C. | Hard surfacing materials such as stellite |
| D. | All of these |
| Answer» D. All of these | |
| 382. |
Most of the oxyacetylene welding is done with? |
| A. | Neutral flame |
| B. | Oxidizing flame |
| C. | Carburising flame |
| D. | All of these |
| Answer» B. Oxidizing flame | |
| 383. |
The cold chisels are made from? |
| A. | Cast iron |
| B. | Mild steel |
| C. | High speed steel |
| D. | Cast tool steel |
| Answer» E. | |
| 384. |
In forehand welding, the angle between the welding rod and the work is kept as? |
| A. | 30°-40° |
| B. | 40°-50° |
| C. | 50°-60° |
| D. | 60°-70° |
| Answer» B. 40¬¨‚àû-50¬¨‚àû | |
| 385. |
The tolerance produced by shell moulding process of casting is? |
| A. | +0.05 mm |
| B. | ±0.2 mm |
| C. | +0.5 mm |
| D. | ±1 mm |
| Answer» C. +0.5 mm | |
| 386. |
According to Indian standards, the total numbers of tolerance grades are? |
| A. | 8 |
| B. | 12 |
| C. | 18 |
| D. | 20 |
| Answer» D. 20 | |
| 387. |
A pattern maker's shrinkage rule considers? |
| A. | All pattern allowances |
| B. | Only shrinkage allowance |
| C. | All materials to be cast |
| D. | All materials of the pattern |
| Answer» C. All materials to be cast | |
| 388. |
Cold working of metal increases? |
| A. | Tensile strength |
| B. | Yield strength |
| C. | Hardness |
| D. | All of these |
| Answer» E. | |
| 389. |
Cores are used to |
| A. | Form internal cavities in the casting |
| B. | Improve mould surface |
| C. | Form a part of a green sand mould |
| D. | All of these |
| Answer» E. | |
| 390. |
The edge of a steel plate cut by oxygen cutting will get hardened when the carbon content is |
| A. | Less than 0.1 percent |
| B. | Less than 0.3 percent |
| C. | More than 0.3 percent |
| D. | Anywhere between 0.1 to 1 percent |
| Answer» D. Anywhere between 0.1 to 1 percent | |
| 391. |
The electron beam welding can be carried out in |
| A. | Open air |
| B. | A shielded gas environment |
| C. | Vacuum |
| D. | A pressurized inert gas chamber |
| Answer» D. A pressurized inert gas chamber | |
| 392. |
The parts of circular cross-section which are symmetrical about the axis of rotation are made by |
| A. | Hot forging |
| B. | Hot spinning |
| C. | Hot extrusion |
| D. | Hot drawing |
| Answer» C. Hot extrusion | |
| 393. |
A moving mandrel is used in |
| A. | Wire drawing |
| B. | Tube drawing |
| C. | Metal cutting |
| D. | Forging |
| Answer» C. Metal cutting | |
| 394. |
The cutting edge of a chisel should be |
| A. | Hardened |
| B. | Tempered |
| C. | Hardened and tempered |
| D. | Case hardened |
| Answer» D. Case hardened | |
| 395. |
Which of the following welding method uses a pool of molten metal? |
| A. | Carbon arc welding |
| B. | Submerged arc welding |
| C. | TIG arc welding |
| D. | MIG arc welding |
| Answer» C. TIG arc welding | |
| 396. |
Thermit welding is often used in |
| A. | Replacing broken gear teeth |
| B. | Repairing broken shears |
| C. | Joining rails, truck frames and locomotive frames etc. |
| D. | All of the above |
| Answer» E. | |
| 397. |
When the dimension is expressed as, then the tolerance is |
| A. | 0.035 mm |
| B. | 0.025 mm |
| C. | 0.01 mm |
| D. | 0.06 mm |
| Answer» E. | |
| 398. |
For cutting brass, the hacksaw blade should have ________ teeth per 25 mm. |
| A. | 14 |
| B. | 24 |
| C. | 32 |
| D. | 40 |
| Answer» B. 24 | |
| 399. |
In welding magnesium with TIG arc welding, direct current with ________ is used. |
| A. | Straight polarity |
| B. | Reversed polarity |
| C. | Both (A) and (B) |
| D. | None of these |
| Answer» C. Both (A) and (B) | |
| 400. |
For smoothing and cleaning out depressions in the mould, a ________ is used. |
| A. | Slick |
| B. | Lifter |
| C. | Swab |
| D. | Gagger |
| Answer» C. Swab | |