MCQOPTIONS
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MCQOPTIONS
This section includes 800 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. |
The method of centre less grinding used to produce taper is |
| A. | In-feed grinding |
| B. | Through feed grinding |
| C. | End feed grinding |
| D. | Any one of these |
| Answer» D. Any one of these | |
| 302. |
Volume of a cube of side ‘l’ and volume of a sphere of radius ‘r’ are equal. Both the cube and the sphere are solid and of same material. They are being cast. The ratio of the solidification time of the cube to the same of the sphere is |
| A. | (4π/6)³ × (r/l)⁶ |
| B. | (4π/6) × (r/l)² |
| C. | (4π/6)² × (r/l)³ |
| D. | (4π/6)² × (r/l)⁴ |
| Answer» E. | |
| 303. |
Which of the following operations can be performed with milling cutters? |
| A. | Cutting key ways on shafts |
| B. | Cutting external screw threads |
| C. | Cutting teeth of spur gears |
| D. | All of these |
| Answer» E. | |
| 304. |
In metal machining, the zone where the maximum heat is generated due to the plastic deformation of metal, is called |
| A. | Friction zone |
| B. | Work-tool contact zone |
| C. | Shear zone |
| D. | None of these |
| Answer» D. None of these | |
| 305. |
In lapping operation, the amount of metal removed is |
| A. | 0.005 to 0.01 mm |
| B. | 0.01 to 0.1 mm |
| C. | 0.05 to 0.1 mm |
| D. | 0.5 to 1 mm |
| Answer» B. 0.01 to 0.1 mm | |
| 306. |
For machining a mild steel workpiece using carbide tool, the maximum material will be removed at a temperature of |
| A. | 50°C |
| B. | 100°C |
| C. | 175°C |
| D. | 275°C |
| Answer» C. 175°C | |
| 307. |
High speed steel tools retain their hardness up to a temperature of |
| A. | 250°C |
| B. | 350°C |
| C. | 500°C |
| D. | 900°C |
| Answer» E. | |
| 308. |
Stellite preserves hardness up to a temperature of |
| A. | 350°C |
| B. | 500°C |
| C. | 900°C |
| D. | 1100°C |
| Answer» E. | |
| 309. |
In a single point turning operation with a cemented carbide and steel combination having a Taylor exponent of 0.25, if the cutting speed is halved, then tool life will become |
| A. | Half |
| B. | Two times |
| C. | Eight times |
| D. | Sixteen times |
| Answer» E. | |
| 310. |
In _________ operation, the cutting force is maximum when the tooth begins its cut and reduces it to minimum when the tooth leaves the work. |
| A. | Up milling |
| B. | Down milling |
| C. | Face milling |
| D. | End milling |
| Answer» C. Face milling | |
| 311. |
The taper on the lathe spindle is |
| A. | 1 in 10 |
| B. | 1 in 15 |
| C. | 1 in 20 |
| D. | 1 in 30 |
| Answer» D. 1 in 30 | |
| 312. |
A right hand tool on a lathe cuts most efficiently when it travels%! |
| A. | From left to right end of the lathe bed |
| B. | From right to left end of the lathe bed |
| C. | With the help of a compound slide |
| D. | Across the bed |
| Answer» C. With the help of a compound slide | |
| 313. |
In the relation VTn = C, the value of n for ceramic tools is%! |
| A. | 0.1 to 0.2 |
| B. | 0.20 to 0.25 |
| C. | 0.25 to 0.40 |
| D. | 0.40 to 0.55 |
| Answer» E. | |
| 314. |
A right hand tool on a lathe cuts most efficiently when it travels%! |
| A. | From left to right end of the lathe bed |
| B. | From right to left end of the lathe bed |
| C. | With the help of a compound slide |
| D. | Across the bed |
| Answer» C. With the help of a compound slide | |
| 315. |
In the relation VTn = C, the value of n for ceramic tools is%! |
| A. | 0.1 to 0.2 |
| B. | 0.20 to 0.25 |
| C. | 0.25 to 0.40 |
| D. | 0.40 to 0.55 |
| Answer» E. | |
| 316. |
The surface finish is improved by the increase in%! |
| A. | Cutting speed |
| B. | Nose radius |
| C. | True rake angle |
| D. | All of these |
| Answer» E. | |
| 317. |
In drilling brass, a drill with%! |
| A. | Zero helix angle is used |
| B. | Low helix angle is used |
| C. | High helix angle is used |
| D. | Any helix angle can be used |
| Answer» C. High helix angle is used | |
| 318. |
In the relation VTn = C, the value of n for carbide tools is%! |
| A. | 0.1 to 0.2 |
| B. | 0.20 to 0.25 |
| C. | 0.25 to 0.40 |
| D. | 0.40 to 0.55 |
| Answer» C. 0.25 to 0.40 | |
| 319. |
Gears can be best produced on mass production by%! |
| A. | Shaping |
| B. | Casting |
| C. | Forming |
| D. | Hobbing |
| Answer» E. | |
| 320. |
In up-cut milling the work piece is fed%! |
| A. | Against the rotating cutter |
| B. | |
| C. | In the direction of the cutter |
| Answer» B. | |
| 321. |
Gears can be best produced on mass production by%! |
| A. | Shaping |
| B. | Casting |
| C. | Forming |
| D. | Hobbing |
| Answer» E. | |
| 322. |
The binding material used in cemented carbide tools is%! |
| A. | Tungsten |
| B. | Chromium |
| C. | Silicon |
| D. | Cobalt |
| Answer» E. | |
| 323. |
In hot machining, the work is heated by%! |
| A. | Simple heating |
| B. | Flame heating |
| C. | Induction heating |
| D. | Any one of these |
| Answer» E. | |
| 324. |
Which of the following statement is wrong about ultrasonic machining?%! |
| A. | It is best suited for machining hard and brittle materials. |
| B. | It cuts materials at very slow speeds |
| C. | It removes large amount of material |
| D. | It produces good surface finish |
| Answer» D. It produces good surface finish | |
| 325. |
A 15 mm drilling machine means that it can drill a hole%! |
| A. | Of maximum diameter 15 mm |
| B. | In 15 mm thick plates |
| C. | |
| Answer» B. In 15 mm thick plates | |
| 326. |
An open structure of a grinding wheel is used for%! |
| A. | Soft materials |
| B. | Tough materials |
| C. | Ductile materials |
| D. | All of these |
| Answer» E. | |
| 327. |
A fixture is defined as a device which%! |
| A. | Holds and locates a workpiece and guides and controls one or more cutting tools |
| B. | Holds and locates a workpiece during an inspection or for a manufacturing operation |
| C. | Is used to check the accuracy of workpiece |
| D. | All of the above |
| Answer» C. Is used to check the accuracy of workpiece | |
| 328. |
The material which on machining produces chips with built up edge is%! |
| A. | Brittle material |
| B. | Tough material |
| C. | Hard material |
| D. | Ductile material |
| Answer» E. | |
| 329. |
What is the type of welding defect is caused due to stresses on heating and cooling called?%! |
| A. | Incomplete penetration |
| B. | Shrinkage void |
| C. | Slag Entrapment (Inclusions) |
| D. | Incomplete fusion |
| Answer» C. Slag Entrapment (Inclusions) | |
| 330. |
In electrochemical machining, the gap between the tool and work is kept as%! |
| A. | 0.1 mm |
| B. | 0.4 mm |
| C. | 0.35 mm |
| D. | 0.75 mm |
| Answer» E. | |
| 331. |
Low helix angle drills are preferred for drilling holes in%! |
| A. | Plastics |
| B. | Copper |
| C. | Cast steel |
| D. | Carbon steel |
| Answer» B. Copper | |
| 332. |
Friction at the tool-chip interface can be reduced by%! |
| A. | Decreasing the rake angle |
| B. | Increasing the depth of cut |
| C. | Decreasing the cutting speed |
| D. | Increasing the cutting speed |
| Answer» E. | |
| 333. |
As tool and work are not in contact in EDM process%! |
| A. | No relative motion occurs between them |
| B. | No wear of tool occurs |
| C. | No power is consumed during metal cutting |
| D. | No force between tool and work occurs |
| Answer» E. | |
| 334. |
Larger end cutting edge angle _________ tool life.%! |
| A. | Increases |
| B. | Decreases |
| C. | Does not effect |
| D. | None of these |
| Answer» B. Decreases | |
| 335. |
In a plain milling machine, the table can be moved%! |
| A. | Longitudinally |
| B. | Crosswise |
| C. | Vertically |
| D. | All of these |
| Answer» E. | |
| 336. |
The tool life is said to be over if%! |
| A. | Poor surface finish is obtained |
| B. | There is sudden increase in cutting forces and power consumption |
| C. | Overheating and fuming due to heat of friction starts |
| D. | All of the above |
| Answer» E. | |
| 337. |
Which of the following operations is carried out at a minimum cutting velocity if the machines are equally rigid and the tool work materials are the same?%! |
| A. | Turning |
| B. | Grinding |
| C. | Boring |
| D. | Milling |
| Answer» E. | |
| 338. |
In transverse grinding%! |
| A. | The work is reciprocated as the wheel feeds to produce cylinders longer than the width of wheel face |
| B. | The work rotates in a fixed position as the wheel feeds to produce cylinders equal to or shorter than the width of wheel face |
| C. | The work is reciprocated as the wheel feeds to produce cylinders shorter than the width of wheel face |
| D. | The work rotates in a fixed position as the wheel feeds to produce cylinders longer than the width of wheel face |
| Answer» B. The work rotates in a fixed position as the wheel feeds to produce cylinders equal to or shorter than the width of wheel face | |
| 339. |
A jig is defined as a device which%! |
| A. | Holds and locates a workpiece and guides and controls one or more cutting tools |
| B. | Holds and locates a workpiece during an inspection or for a manufacturing operation |
| C. | Is used to check the accuracy of workpiece |
| D. | All of the above |
| Answer» B. Holds and locates a workpiece during an inspection or for a manufacturing operation | |
| 340. |
High speed steel drills can be operated at about _________ the speed of high carbon steel drills.%! |
| A. | One-half |
| B. | One-fourth |
| C. | Double |
| D. | Four times |
| Answer» D. Four times | |
| 341. |
The operation of producing grooves around the periphery of a cylindrical or conical workpiece is called%! |
| A. | Profile milling |
| B. | Gang milling |
| C. | Saw milling |
| D. | Helical milling |
| Answer» E. | |
| 342. |
The grooving is an operation of%! |
| A. | Beveling the extreme end of a workpiece |
| B. | Embossing a diamond shaped pattern on the surface of a workpiece |
| C. | Reducing the diameter of a workpiece over a very narrow surface |
| D. | Enlarging the end of a hole cylindrically |
| Answer» D. Enlarging the end of a hole cylindrically | |
| 343. |
The cutting speed for drilling __________ with high speed steel drills is 24 to 45 m/min.%! |
| A. | Mild steel |
| B. | Copper |
| C. | Aluminium |
| D. | Brass |
| Answer» B. Copper | |
| 344. |
A better machinable metal is one which gives%! |
| A. | Lower chip-tool contact area and larger shear angle |
| B. | Higher chip-tool contact area and smaller shear angle |
| C. | Lower chip-tool contact area and smaller shear angle |
| D. | Higher chip-tool contact area and larger shear angle |
| Answer» B. Higher chip-tool contact area and smaller shear angle | |
| 345. |
Which of the following parameters govern the value of shear angle in continuous chip formation?%! |
| A. | True feed |
| B. | Chip thickness |
| C. | Rake angle of the cutting tool |
| D. | All of these |
| Answer» E. | |
| 346. |
Hard and tough materials like cast iron should be turned at%! |
| A. | Slow speed |
| B. | High speed |
| C. | Any speed |
| D. | Certain specific speed |
| Answer» B. High speed | |
| 347. |
The helix angle of a drill is __________ for drilling brass.%! |
| A. | Equal to 30° |
| B. | Less than 30° |
| C. | More than 30° |
| D. | None of these |
| Answer» C. More than 30¬¨‚àû | |
| 348. |
The drill spindles are provided with standard taper known as%! |
| A. | Morse taper |
| B. | Seller's taper |
| C. | Chapman taper |
| D. | Brown and Sharpe taper |
| Answer» B. Seller's taper | |
| 349. |
Twist drills are made of%! |
| A. | High speed steel |
| B. | Carbon steel |
| C. | Stainless steel |
| D. | Either (A) or (B) |
| Answer» E. | |
| 350. |
A grinding wheel is said to be of _________ if it holds the abrasive grains more securely.%! |
| A. | Soft grade |
| B. | Medium grade |
| C. | Hard grade |
| D. | None of these |
| Answer» D. None of these | |