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.
| 401. |
Holes are machined by push broaches only for sizing. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» B. Incorrect | |
| 402. |
Buffing wheels are made of |
| A. | softer metals |
| B. | cotton fabric |
| C. | carbon |
| D. | graphite |
| Answer» C. carbon | |
| 403. |
Drilling is an example of |
| A. | orthogonal cutting |
| B. | oblique cutting |
| C. | simple cutting |
| D. | uniform cutting |
| Answer» C. simple cutting | |
| 404. |
A broach has |
| A. | roughing teeth |
| B. | semi-finishing teeth |
| C. | finishing teeth |
| D. | all of these |
| Answer» E. | |
| 405. |
In down 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» C. uniform throughout the cut | |
| 406. |
If the diameter of the hole is subject to considerable variation, then for locating in jigs and fixtures, the pressure type of locator used is |
| A. | conical locator |
| B. | cylindrical locator |
| C. | diamond pin locator |
| D. | vee locator |
| Answer» B. cylindrical locator | |
| 407. |
When the tool moves parallel to the lathe axis, the movement is termed as |
| A. | cross feed |
| B. | angular feed |
| C. | longitudinal feed |
| D. | any one of these |
| Answer» D. any one of these | |
| 408. |
The cutting speed for counter-boring should be __________ that of drilling operation. |
| A. | equal to |
| B. | less than |
| C. | greater than |
| D. | None of these |
| Answer» D. None of these | |
| 409. |
Dielectric is used in |
| A. | electro-chemical machining |
| B. | ultra-sonic machining |
| C. | electro-discharge machining |
| D. | laser machining |
| Answer» D. laser machining | |
| 410. |
Spot facing is an operation of smoothing and squaring the surface around a hole. |
| A. | True |
| B. | False |
| C. | Can't say |
| D. | None of these |
| Answer» B. False | |
| 411. |
The relation between tool life (T) and cutting speed (V) is VTn = Constant. In this relation, the value of n depends upon |
| A. | work material |
| B. | tool material |
| C. | working conditions |
| D. | type of chip produced |
| Answer» C. working conditions | |
| 412. |
When the cutting edge of the tool is dull, then during machining |
| A. | continuous chips are formed |
| B. | discontinuous chips are formed |
| C. | continuous chips with built-up edge are formed |
| D. | no chips are formed |
| Answer» D. no chips are formed | |
| 413. |
A round nose tool may be fed eitner from left to right end or from right to left end of the lathe bed. |
| A. | Yes |
| B. | No |
| C. | Can't say |
| D. | None of these |
| Answer» B. No | |
| 414. |
In order to prevent tool from rubbing the work __________ on tools are provided. |
| A. | rake angles |
| B. | relief angles |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 415. |
The silicon carbide abrasive is chiefly used for grinding |
| A. | cemented carbide |
| B. | ceramic |
| C. | cast iron |
| D. | all of these |
| Answer» E. | |
| 416. |
The advantage of a broaching operation is that |
| A. | rate of production is very high |
| B. | high accuracy and high class of surface finish is possible |
| C. | roughing and finishing cuts are completed in one pass of the tool |
| D. | all of the above |
| Answer» E. | |
| 417. |
In order to achieve a specific surface finish in single point turning, the most important factor to be controlled is |
| A. | depth of cut |
| B. | cutting speed |
| C. | feed |
| D. | tool rake angle |
| Answer» C. feed | |
| 418. |
The tool life __________ as the cutting speed increases. |
| A. | decreases |
| B. | increases |
| C. | Can't say |
| D. | None of these |
| Answer» B. increases | |
| 419. |
Lathe bed is made of |
| A. | mild steel |
| B. | alloy steel |
| C. | pig iron |
| D. | chilled cast iron |
| Answer» E. | |
| 420. |
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. | |
| 421. |
Which of the following statement is correct in regard to centreless grinding? |
| A. | The workpiece is supported throughout its entire length as grinding takes place. |
| B. | It is a continuous process and adopted for production work. |
| C. | It requires no holding device for the work. |
| D. | all of the above |
| Answer» E. | |
| 422. |
In a centre lathe, the cutting tool is fed in __________ with reference to the lathe axis. |
| A. | cross direction only |
| B. | longitudinal direction only |
| C. | both cross and longitudinal direction |
| D. | any direction |
| Answer» D. any direction | |
| 423. |
Low helix angle drills are preferred for drilling holes in |
| A. | plastics |
| B. | copper |
| C. | cast steel |
| D. | carbon steel |
| Answer» B. copper | |
| 424. |
The tool life in case of a grinding wheel is the time |
| A. | between two successive regrinds of the wheel |
| B. | taken for the wheel to be balanced |
| C. | taken between two successive wheel dressings |
| D. | taken for a wear of 1 mm on its diameter |
| Answer» D. taken for a wear of 1 mm on its diameter | |
| 425. |
The rate of removing metal is __________ by increasing the depth of cut. |
| A. | decreased |
| B. | increased |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 426. |
In machining metals, surface roughness is due to |
| A. | feed marks or ridges left by the cutting tool |
| B. | fragment of built-up edge on the machined surface |
| C. | cutting tool vibrations |
| D. | all of these |
| Answer» E. | |
| 427. |
The grinding operaion is a |
| A. | shaping operation |
| B. | forming operation |
| C. | surface finishing operation |
| D. | dressing operation |
| Answer» D. dressing operation | |
| 428. |
Gears can be best produced on mass production by |
| A. | shaping |
| B. | casting |
| C. | forming |
| D. | hobbing |
| Answer» E. | |
| 429. |
The velocity of tool along the tool face is known as |
| A. | shear velocity |
| B. | chip velocity |
| C. | cutting velocity |
| D. | mean velocity |
| Answer» C. cutting velocity | |
| 430. |
Back rake angle of a single point tool is the angle by which the face of the tool is inclined towards back. |
| A. | Agree |
| B. | Disagree |
| C. | Can't say |
| D. | None of these |
| Answer» B. Disagree | |
| 431. |
Up milling is also called conventional milling. |
| A. | Agree |
| B. | Disagree |
| C. | Can't say |
| D. | None of these |
| Answer» B. Disagree | |
| 432. |
Mild steel during machining produces __________ chips. |
| A. | continuous |
| B. | discontinuous |
| C. | Can't say |
| D. | None of these |
| Answer» B. discontinuous | |
| 433. |
The process of changing the shape of grinding wheel as it becomes worn due to breaking away of the abrasive and bond, is called |
| A. | truing |
| B. | dressing |
| C. | facing |
| D. | clearing |
| Answer» B. dressing | |
| 434. |
In oblique cutting of metals, the cutting edge of the tool is |
| A. | perpendicular to the workpiece |
| B. | perpendicular to the direction of tool travel |
| C. | parallel to the direction of tool travel |
| D. | inclined at an angle less than 90° to the direction of tool travel |
| Answer» E. | |
| 435. |
The process of improving the cutting action of the grinding wheel is called |
| A. | truing |
| B. | dressing |
| C. | facing |
| D. | clearing |
| Answer» C. facing | |
| 436. |
The infeed grinding is used to |
| A. | produce tapers |
| B. | grind shoulders and formed surfaces |
| C. | grind long, slender shafts or bars |
| D. | ail of these |
| Answer» C. grind long, slender shafts or bars | |
| 437. |
For machining a mild steel workpiece by a high speed steel tool, the average cutting speed is |
| A. | 5 m/min |
| B. | 10 m/min |
| C. | 15 m/min |
| D. | 30 m/min |
| Answer» E. | |
| 438. |
For turning small taper on long workpiece, the suitable method is |
| A. | by a form tool |
| B. | by setting over the tail stock |
| C. | by a taper turning attachment |
| D. | by swivelling the compound rest |
| Answer» C. by a taper turning attachment | |
| 439. |
In metal cutting operations, the shear angle is the angle made by the shear plane with the |
| A. | direction of the tool axis |
| B. | direction of tool travel |
| C. | perpendicular to the direction of the tool axis |
| D. | central plane of the workpiece |
| Answer» C. perpendicular to the direction of the tool axis | |
| 440. |
The actual feed in centreless grinders is given by (where d = Dia. of regulating wheel, n = Revolutions per minute, and α = Angle of inclination of wheel) |
| A. | πd |
| B. | πd n |
| C. | πd n sin α |
| D. | πd n cos α |
| Answer» D. πd n cos α | |
| 441. |
The tool life, in case of continuous cutting, is much better than intermittent cutting. |
| A. | Agree |
| B. | Disagree |
| C. | Can't say |
| D. | None of these |
| Answer» B. Disagree | |
| 442. |
The grooving 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. | enlarging the end of a hole cylindrically |
| Answer» D. enlarging the end of a hole cylindrically | |
| 443. |
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. | |
| 444. |
The lathe spindles at the nose end have |
| A. | internal screw threads |
| B. | external screw threads |
| C. | no threads |
| D. | tapered threads |
| Answer» C. no threads | |
| 445. |
The machining of titanium is difficult due to |
| A. | high thermal conductivity of titanium |
| B. | chemical reaction between tool and work |
| C. | low tool-chip contact area |
| D. | none of these |
| Answer» D. none of these | |
| 446. |
In oblique cutting system, the cutting edge of the tool |
| A. | may clear the width of the workpiece |
| B. | may or may not clear the width of the workpiece |
| C. | may not clear the width of the workpiece |
| D. | should always clear the width of the workpiece |
| Answer» D. should always clear the width of the workpiece | |
| 447. |
Surface grinding is done to produce |
| A. | tapered surface |
| B. | flat surface |
| C. | internal cylindrical holes |
| D. | all of these |
| Answer» C. internal cylindrical holes | |
| 448. |
The tool may fail due to |
| A. | cracking at the cutting edge due to thermal stresses |
| B. | chipping of the cutting edge |
| C. | plastic deformation of the cutting edge |
| D. | all of these |
| Answer» E. | |
| 449. |
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 | |
| 450. |
In a universal milling machine, the table can be swiveled horizontally and can be fed at an angle to the milling machine spindle. |
| A. | True |
| B. | False |
| C. | Can't say |
| D. | None of these |
| Answer» B. False | |