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.
| 301. |
_ A diamond pointed chisel is used for cutting$? |
| A. | Flat surfaces |
| B. | Grooves |
| C. | Key-ways |
| D. | V-shaped grooves |
| Answer» E. | |
| 302. |
_ A file removes the metal during$? |
| A. | Forward stroke |
| B. | Return stroke |
| C. | Both forward and return strokes |
| D. | None of these |
| Answer» B. Return stroke | |
| 303. |
_ A rip saw$? |
| A. | Is a two man saw |
| B. | Is used for cutting along the grains of wood |
| C. | Has a narrow blade with two wooden handles |
| D. | All of the above |
| Answer» C. Has a narrow blade with two wooden handles | |
| 304. |
_ In order to ram the sand harder at the back of the mould and softer on the pattern face, a ________ is used.$? |
| A. | Sand slinger |
| B. | Squeezing machine |
| C. | Jolt machine |
| D. | Stripper plate machine |
| Answer» C. Jolt machine | |
| 305. |
_ The acetylene cylinder is usually painted with$? |
| A. | Black colour |
| B. | White colour |
| C. | Maroon colour |
| D. | Yellow colour |
| Answer» D. Yellow colour | |
| 306. |
_ For welding plates of thickness less than 5 mm, its edges$? |
| A. | Do not require bevelling |
| B. | Should be bevelled to a single-V or U-groove |
| C. | Should have a double-V or U-groove on one side |
| D. | Should have a double-V or U-groove on both sides |
| Answer» B. Should be bevelled to a single-V or U-groove | |
| 307. |
_ The blank diameter used in thread rolling will be$? |
| A. | Equal to minor diameter of the thread |
| B. | Equal to pitch diameter of the thread |
| C. | A little larger than the minor diameter of the thread |
| D. | A little larger than the pitch diameter of the thread |
| Answer» D. A little larger than the pitch diameter of the thread | |
| 308. |
_ In sheet metal blanking, shear is provided on punches and dies so that$? |
| A. | Press load is reduced |
| B. | Good cut edge is obtained |
| C. | Warping of sheet is minimized |
| D. | Cut blanks is straight |
| Answer» B. Good cut edge is obtained | |
| 309. |
_ When a pattern is made in three parts, the top part, is known as a$? |
| A. | Drag |
| B. | Cheek |
| C. | Cope |
| D. | None of these |
| Answer» D. None of these | |
| 310. |
_ Piercing is an operation of cutting$? |
| A. | A cylindrical hole in a sheet of metal by the punch and the die |
| B. | A hole (other than cylindrical) in a sheet of metal by the punch and the die |
| C. | A flat sheet to the desired shape |
| D. | A number of holes evenly spaced in a regular pattern on a sheet of metal |
| Answer» C. A flat sheet to the desired shape | |
| 311. |
_ A casting defect which results in general enlargement of a casting is known as$? |
| A. | Shift |
| B. | Sand wash |
| C. | Swell |
| D. | Scab |
| Answer» D. Scab | |
| 312. |
_ The adhesiveness is the property of sand due to which$? |
| A. | It evolves a great amount of steam and other gases |
| B. | The sand grains stick together |
| C. | It clings to the sides of a moulding box |
| D. | None of these |
| Answer» D. None of these | |
| 313. |
_ The material which can be best cut with oxygen cutting process is$? |
| A. | Mild steel |
| B. | Brass |
| C. | Copper |
| D. | Aluminium |
| Answer» B. Brass | |
| 314. |
_ the most preferred process for casting gas turbine blades is$? |
| A. | Die casting |
| B. | Shell moulding |
| C. | Investment moulding |
| D. | Sand casting |
| Answer» C. Investment moulding | |
| 315. |
_ The draft or taper allowance on casting is generally$? |
| A. | 1 to 2 mm/m |
| B. | 2 to 5 mm/m |
| C. | 5 to 10 mm/m |
| D. | 10 to 15 mm/m |
| Answer» B. 2 to 5 mm/m | |
| 316. |
_ The advantage of Thermit welding is that$? |
| A. | All parts of the weld section are molten at the same time |
| B. | Weld cools almost uniformly |
| C. | Results in a minimum problem with internal residual stresses |
| D. | All of the above |
| Answer» E. | |
| 317. |
_ In a four high rolling mill, the diameter of backing up rolls is ________ the diameter of working rolls.$? |
| A. | Equal to |
| B. | Smaller than |
| C. | Larger than |
| D. | None of these |
| Answer» D. None of these | |
| 318. |
_ Tandem drawing of wires and tubes is necessary because$? |
| A. | It is not possible to reduce at one stage |
| B. | Annealing is needed between stages |
| C. | Accuracy in dimensions is not possible otherwise |
| D. | Surface finish improves after every drawing stage |
| Answer» C. Accuracy in dimensions is not possible otherwise | |
| 319. |
_ If an aluminium pattern made from a wooden master pattern is to be used for grey iron castings, then the shrinkage allowance allowed on the wooden pattern should be$? |
| A. | 10 mm/m |
| B. | 16 mm/m |
| C. | 20 mm/m |
| D. | 26 mm/m |
| Answer» E. | |
| 320. |
_ The surface to be left unmachined is marked on the pattern by$? |
| A. | Red colour |
| B. | Yellow colour |
| C. | Black colour |
| D. | Blue colour |
| Answer» D. Blue colour | |
| 321. |
__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 | |
| 322. |
__In a gas welding of mild steel using an oxyacetylene flame, the total amount of acetylene consumed is 10 litres. The oxygen consumption from the cylinder is__ |
| A. | 5 litres |
| B. | 10 litres |
| C. | 15 litres |
| D. | 20 litres |
| Answer» C. 15 litres | |
| 323. |
__The welding set up is said to have straight polarity, when__ |
| A. | Work is connected to the positive terminal and the electrode holder to the negative terminal |
| B. | Work is connected to the negative terminal and the electrode holder to the positive terminal |
| C. | Work is connected to the positive terminal and the electrode holder is earthed |
| D. | Work is connected to the negative terminal and the electrode holder is earthed |
| Answer» B. Work is connected to the negative terminal and the electrode holder to the positive terminal | |
| 324. |
__In a simple die__ |
| A. | Two or more operations are performed simultaneously at the single stroke of the ram |
| B. | Two or more cutting operations are performed at one station of the press in every stroke of the ram |
| C. | Both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram |
| D. | None of the above |
| Answer» E. | |
| 325. |
__The minimum size of a bloom is__ |
| A. | 5 cm √ó 5 cm |
| B. | 10 cm √ó 10 cm |
| C. | 15 cm √ó 15 cm |
| D. | 20 cm √ó 20 cm |
| Answer» D. 20 cm ‚àö√≥ 20 cm | |
| 326. |
__Cutting and forming operations can be performed in a single operation in a__ |
| A. | Simple die |
| B. | Progressive die |
| C. | Compound die |
| D. | Combination die |
| Answer» E. | |
| 327. |
_A progressive limit gauge has$? |
| A. | 'Go' and 'Not go' member on the same side of the gauge |
| B. | Separate 'Go' and 'Not go' members |
| C. | 'Go' member at one end and 'Not go' member at the other end |
| D. | None of the above |
| Answer» B. Separate 'Go' and 'Not go' members | |
| 328. |
_The width of slot cut by a hacksaw blade is _______ the width of the blade.$? |
| A. | Equal to |
| B. | Less than |
| C. | Greater than |
| D. | None of these |
| Answer» D. None of these | |
| 329. |
_A three high rolling mill consists of three rolls placed one above the other. Which of the following statement is correct?$? |
| A. | The upper and middle rolls rotate in the same direction whereas the bottom roll rotates in opposite direction |
| B. | The upper and bottom rolls rotate in the same direction whereas the middle roll rotates in opposite direction |
| C. | The bottom and middle roll rotate in the same direction |
| D. | Any one of the above |
| Answer» C. The bottom and middle roll rotate in the same direction | |
| 330. |
_In backhand welding, the angle between the welding torch and the work is kept as$? |
| A. | 30°-40° |
| B. | 40°-50° |
| C. | 50°-60° |
| D. | 60°-70° |
| Answer» C. 50¬¨‚àû-60¬¨‚àû | |
| 331. |
_In order to get uniform thickness of the plate by rolling process, one provides$? |
| A. | Camber on the rolls |
| B. | Offset on the rolls |
| C. | Hardening of the rolls |
| D. | Antifriction bearings |
| Answer» D. Antifriction bearings | |
| 332. |
_Metal patterns are used for$? |
| A. | Small castings |
| B. | Large castings |
| C. | Complicated castings |
| D. | Large scale production of castings |
| Answer» E. | |
| 333. |
_In welding copper alloys with TIG arc welding$? |
| A. | Direct current with straight polarity is used |
| B. | Direct current with reversed polarity is used |
| C. | Alternating current is used |
| D. | Any one of these |
| Answer» B. Direct current with reversed polarity is used | |
| 334. |
_The process used to improve fatigue resistance of the metal by setting up compressive stresses in its surface, is known as$? |
| A. | Hot piercing |
| B. | Extrusion |
| C. | Cold peening |
| D. | Cold heading |
| Answer» D. Cold heading | |
| 335. |
_The welding process used to join the ends of two pipes of uniform cross-section, is$? |
| A. | Spot welding |
| B. | Seam welding |
| C. | Projection welding |
| D. | Upset butt welding |
| Answer» E. | |
| 336. |
_In average work, the tolerance produced by investment casting method is$? |
| A. | ±0.05 mm |
| B. | +0.2 mm |
| C. | +05 mm |
| D. | +1 mm |
| Answer» B. +0.2 mm | |
| 337. |
_Structural sections such as rails, angles, I-beams are made by$? |
| A. | Hot rolling |
| B. | Hot drawing |
| C. | Hot piercing |
| D. | Hot extrusion |
| Answer» B. Hot drawing | |
| 338. |
_The recrystallisation temperature of steel is$? |
| A. | 400°C |
| B. | 600°C |
| C. | 800°C |
| D. | None of these |
| Answer» D. None of these | |
| 339. |
_The electrode tip diameter (d) in spot welding should be equal to (where t = Thickness of plate to be welded)$? |
| A. | ‚à öt |
| B. | 1.5 t |
| C. | 3 t |
| D. | 6 t |
| Answer» B. 1.5 t | |
| 340. |
_For gas welding, the pressure desired at the welding torch for acetylene is$? |
| A. | 7 to 103 kN/m² |
| B. | 70 to 280 kN/m² |
| C. | 280 to 560 kN/m² |
| D. | 560 to 840 kN/m² |
| Answer» B. 70 to 280 kN/m¬¨‚⧠| |
| 341. |
_A casting defect which occurs due to improper venting of sand is known as$? |
| A. | Cold shuts |
| B. | Blow holes |
| C. | Shift |
| D. | Swell |
| Answer» C. Shift | |
| 342. |
_Thread rolling is restricted to$? |
| A. | Ferrous materials |
| B. | Ductile materials |
| C. | Hard materials |
| D. | None of these |
| Answer» C. Hard materials | |
| 343. |
_In forehand welding, the weld is made$? |
| A. | From left to right |
| B. | From right to left |
| C. | First from left to right and then from right to left |
| D. | Either from left to right or from right to left |
| Answer» C. First from left to right and then from right to left | |
| 344. |
_In arc welding, the electric arc is produced between the work and the electrode by$? |
| A. | Voltage |
| B. | Flow of current |
| C. | Contact resistance |
| D. | All of these |
| Answer» D. All of these | |
| 345. |
_For welding plates of thickness more than 12.5 mm, its edges$? |
| A. | Do not require bevelling |
| B. | Should be bevelled to a single-V or U-groove |
| C. | Should have a double-V or U-groove on one side |
| D. | Should have a double-V or U-groove on both sides |
| Answer» E. | |
| 346. |
_In order to produce uniform packing of sand in the moulds, a _________ is used.$? |
| A. | Sand slinger |
| B. | Squeezing machine |
| C. | Jolt machine |
| D. | Stripper plate machine |
| Answer» B. Squeezing machine | |
| 347. |
_The temperature of the inner luminous cone of neutral flame is about$? |
| A. | 1000°C |
| B. | 1250°C |
| C. | 2100°C |
| D. | 3200°C |
| Answer» E. | |
| 348. |
_A file with 20 teeth in 25 mm is called$? |
| A. | Rough file |
| B. | Bastard file |
| C. | Second cut file |
| D. | Smooth file |
| Answer» B. Bastard file | |
| 349. |
_Green sand is a mixture of$? |
| A. | 30% sand and 70% clay |
| B. | 50% sand and 50% clay |
| C. | 70% sand and 30% clay |
| D. | 90% sand and 10% clay |
| Answer» D. 90% sand and 10% clay | |
| 350. |
_In TIG arc welding, the welding zone is shielded by an atmosphere of$? |
| A. | Helium gas |
| B. | Argon gas |
| C. | Either (A) or (B) |
| D. | None of these |
| Answer» D. None of these | |