MCQOPTIONS
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MCQOPTIONS
This section includes 493 Mcqs, each offering curated multiple-choice questions to sharpen your Mongodb knowledge and support exam preparation. Choose a topic below to get started.
| 351. |
The grinding wheel speed (surface speed in m/min) usually varies from |
| A. | 500 to 1000 |
| B. | 1000 to 1500 |
| C. | 1500 to 2000 |
| D. | 2000 to 2500 |
| Answer» D. 2000 to 2500 | |
| 352. |
The angle between the lathe centres is |
| A. | 30° |
| B. | 45° |
| C. | 60° |
| D. | 90° |
| Answer» D. 90° | |
| 353. |
Gear finishing operation is called |
| A. | shaping |
| B. | milling |
| C. | hobbing |
| D. | burnishing |
| Answer» E. | |
| 354. |
The cutting speed of a drill varies from point to point on the cutting edge of the drill. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» B. Incorrect | |
| 355. |
An open structure of a grinding wheel is denoted by the number 1 to 8. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 356. |
In centreless grinding, the surface speed of regulating wheel is |
| A. | 5 to 15 m/min |
| B. | 15 to 60 m/min |
| C. | 60 to 90 m/min |
| D. | 90 to 120 m/min |
| Answer» C. 60 to 90 m/min | |
| 357. |
The form grinding is used to grind gear teeth, threads, splined shafts and holes. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» B. Incorrect | |
| 358. |
Ceramic tools are fixed to tool body by |
| A. | soldering |
| B. | brazing |
| C. | welding |
| D. | clamping |
| Answer» C. welding | |
| 359. |
Internal gears can be made by |
| A. | hobbing |
| B. | shaping with pinion cutter |
| C. | shaping with rack cutter |
| D. | milling |
| Answer» C. shaping with rack cutter | |
| 360. |
The increase in depth of cut and feed rate __________ surface finish. |
| A. | improves |
| B. | deteriorates |
| C. | does not effect |
| D. | None of these |
| Answer» C. does not effect | |
| 361. |
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 | |
| 362. |
Side relief angle of a single point tool is the angle |
| A. | by which the face of the tool is inclined towards back |
| B. | by which the face of the tool is inclined sideways |
| C. | between the surface of the flank immediately below the point and a plane at right angles to the centre line of the point of tool |
| D. | between the surface of the flank immediately below the point and a line drawn from the point perpendicular to the base |
| Answer» D. between the surface of the flank immediately below the point and a line drawn from the point perpendicular to the base | |
| 363. |
The operation of smoothing and squaring the surface around a hole is known as |
| A. | counter-sinking |
| B. | counter-boring |
| C. | trepanning |
| D. | spot facing |
| Answer» E. | |
| 364. |
Tumbler gears in lathe are used to |
| A. | reduce the spindle speed |
| B. | cut gears |
| C. | give desired direction of movement to the lathe carriage |
| D. | drill a workpiece |
| Answer» D. drill a workpiece | |
| 365. |
The factor responsible for the formation of discontinuous chips is |
| A. | low cutting speed and large rake angle |
| B. | low cutting speed and small rake angle |
| C. | high cutting speed and large rake angle |
| D. | high cutting speed and small rake angle |
| Answer» C. high cutting speed and large rake angle | |
| 366. |
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 | |
| 367. |
The factor considered for evaluation of machinability is |
| A. | cutting forces and power consumption |
| B. | tool life |
| C. | type of chips and shear angle |
| D. | all of these |
| Answer» E. | |
| 368. |
The angle on which the strength of the tool depends is |
| A. | rake angle |
| B. | cutting angle |
| C. | clearance angle |
| D. | lip angle |
| Answer» B. cutting angle | |
| 369. |
The width of cutting edge of a parting-off tool varies from |
| A. | 3 to 12 mm |
| B. | 5 to 20 mm |
| C. | 8 to 30 mm |
| D. | 15 to 40 mm |
| Answer» B. 5 to 20 mm | |
| 370. |
The usual value of the helix angle of a drill is |
| A. | 20° |
| B. | 30° |
| C. | 45° |
| D. | 60° |
| Answer» C. 45° | |
| 371. |
The operation of reproduction of an outline of a template on a workpiece is called face milling. |
| A. | Yes |
| B. | No |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 372. |
The average cutting speed for turning brass with a high speed steel tool is |
| A. | 15 to 19 m/min |
| B. | 25 to 31 m/min |
| C. | 60 to 90 m/min |
| D. | 90 to 120 m/min |
| Answer» D. 90 to 120 m/min | |
| 373. |
The lip angle of a single point tool is usually |
| A. | 20° to 40° |
| B. | 40° to 60° |
| C. | 60° to 80° |
| D. | none of these |
| Answer» D. none of these | |
| 374. |
Side rake angle on tools is provided to control chip flow. |
| A. | True |
| B. | False |
| C. | Can't say |
| D. | None of these |
| Answer» B. False | |
| 375. |
The maximum production of small and slender parts is done by |
| A. | watch maker's lathe |
| B. | sliding head stock automatic lathe |
| C. | multispindle automatic lathe |
| D. | capastan lathe |
| Answer» D. capastan lathe | |
| 376. |
Cast iron during machining produces |
| A. | continuous chips |
| B. | discontinuous chips |
| C. | continuous chips with built-up-edge |
| D. | none of these |
| Answer» C. continuous chips with built-up-edge | |
| 377. |
The method of grinding used to produce a straight or tapered surface on a workpiece, is |
| A. | internal cylindrical grinding |
| B. | form grinding |
| C. | external cylindrical grinding |
| D. | surface grinding |
| Answer» D. surface grinding | |
| 378. |
A single point thread cutting tool should ideally have |
| A. | zero rake angle |
| B. | positive rake angle |
| C. | negative rake angle |
| D. | point angle |
| Answer» B. positive rake angle | |
| 379. |
The work or surface speed for cylindrical grinding varies from |
| A. | 5 to 10 m/min |
| B. | 10 to 20 m/min |
| C. | 20 to 30 m/min |
| D. | 40 to 60 m/min |
| Answer» D. 40 to 60 m/min | |
| 380. |
The cutting tool in a milling machine is mounted on |
| A. | spindle |
| B. | arbor |
| C. | column |
| D. | knee |
| Answer» C. column | |
| 381. |
A fine grained grinding wheel is used to grind hard materials. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» B. Incorrect | |
| 382. |
A twist drill is a |
| A. | side cutting tool |
| B. | front cutting tool |
| C. | end cutting tool |
| D. | none of these |
| Answer» D. none of these | |
| 383. |
Twist drills are made of |
| A. | high speed steel |
| B. | carbon steel |
| C. | stainless steel |
| D. | either (a) or (b) |
| Answer» E. | |
| 384. |
A push broach as compared to pull broach |
| A. | has less number of teeth |
| B. | is short and stocky |
| C. | removes less material for each pass of the tool |
| D. | all of the above |
| Answer» E. | |
| 385. |
The rake angle required to machine brass by high speed steel tool is |
| A. | 0° |
| B. | 10° |
| C. | 20° |
| D. | -10° |
| Answer» B. 10° | |
| 386. |
The tool made of cemented carbide wear out faster at |
| A. | slow speeds |
| B. | medium speeds |
| C. | fast speeds |
| D. | very fast speeds |
| Answer» B. medium speeds | |
| 387. |
The correct sequence of tool materials in increasing order of their ability to retain their hot hardness is |
| A. | carbide, ceramic, cermet, borazon |
| B. | ceramic, carbide, borazon, cermet |
| C. | cermet, carbide, ceramic, borazon |
| D. | borazon, ceramic, carbide, cermet |
| Answer» D. borazon, ceramic, carbide, cermet | |
| 388. |
A left 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» B. from right to left end of the lathe bed | |
| 389. |
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 | |
| 390. |
Which of the following statement is incorrect with reference of lathe cutting tools? |
| A. | The flank of the tool is the surface or surfaces below and adjacent to the cutting edges |
| B. | The nose is the corner, arc or chamfer joining the side cutting and the end cutting edges |
| C. | The heel is that part of the tool which is shaped to produce the cutting edges and face |
| D. | The base is that surface of the shank which bears against the support and takes tangent pressure of the cut |
| Answer» D. The base is that surface of the shank which bears against the support and takes tangent pressure of the cut | |
| 391. |
In up milling, the thickness of chip is |
| A. | minimum at the beginning of the cut and maximum at the end of the cut |
| B. | maximum at the beginning of the cut and minimum at the end of the cut |
| C. | uniform throughout the cut |
| D. | none of these |
| Answer» B. maximum at the beginning of the cut and minimum at the end of the cut | |
| 392. |
Gear lapping is an operation |
| A. | after heat treatment |
| B. | prior to heat treatment |
| C. | for gear reconditioning |
| D. | none of these |
| Answer» B. prior to heat treatment | |
| 393. |
The facing is an operation of |
| A. | bevelling 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. | machining the ends of a workpiece to produce a flat surface square with the axis |
| Answer» E. | |
| 394. |
A fixture does not guide the tool. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» B. Incorrect | |
| 395. |
The swing diameter over carriage is always less than the swing diameter over bed. |
| A. | Yes |
| B. | No |
| C. | Can't say |
| D. | None of these |
| Answer» B. No | |
| 396. |
Crater wear occurs mainly on the |
| A. | nose part, front relief face and side relief face of the cutting tool |
| B. | face of the cutting tool at a short distance from the cutting edge only |
| C. | cutting edge only |
| D. | front face only |
| Answer» C. cutting edge only | |
| 397. |
An operation of enlarging the end of a hole cylindrically is known as grooving. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 398. |
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 | |
| 399. |
In drilling aluminium, 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» D. any helix angle can be used | |
| 400. |
In which of the following machine, the work is usually rotated while the drill is fed into work? |
| A. | Sensitive drilling machine |
| B. | Radial drilling machine |
| C. | Gang drilling machine |
| D. | Deep hole drilling machine |
| Answer» E. | |