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.
| 301. |
The tap used to cut threads in a blind hole is |
| A. | taper tap |
| B. | second tap |
| C. | bottoming tap |
| D. | any one of these |
| Answer» D. any one of these | |
| 302. |
Which of the following statement is correct regarding grinding of high carbon steel? |
| A. | Grinding at high speed results in the reduction of chip thickness and cutting forces per grit. |
| B. | Aluminium oxide wheels are employed. |
| C. | The grinding wheel has to be of open structure. |
| D. | all of the above |
| Answer» E. | |
| 303. |
Which of the following statement is wrong as regard to down milling? |
| A. | It can not be used on old machines due to backlash between the feed screw of the table and the nut. |
| B. | The chips are disposed off easily and do not interfere with the cutting. |
| C. | The surface milled appears to be slightly wavy. |
| D. | The coolant can be poured directly at the cutting zone where the cutting force is maximum. |
| Answer» D. The coolant can be poured directly at the cutting zone where the cutting force is maximum. | |
| 304. |
Which of the following statement is correct for oblique cutting system? |
| A. | The cutting edge is inclined at an angle less than 90° with the normal to the velocity of the tool. |
| B. | Frequently, more than one cutting edges are in action. |
| C. | The chip flows on the tool face at an angle less than 90° with the normal on the cutting edge. |
| D. | all of the above |
| Answer» E. | |
| 305. |
The operation performed on a shaper is |
| A. | machining horizontal surface |
| B. | machining vertical surface |
| C. | machining angular surface |
| D. | all of these |
| Answer» E. | |
| 306. |
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 | |
| 307. |
A lathe with four steps on the cone pulley and with backgears will have |
| A. | four direct speeds |
| B. | four indirect speeds |
| C. | four direct and four indirect speeds |
| D. | eight indirect speeds |
| Answer» D. eight indirect speeds | |
| 308. |
Which of the following statement is correct about hot machining? |
| A. | It requires less power than machining metals at room temperature. |
| B. | The rate of tool wear is lower. |
| C. | It is used for machining high strength and high temperature resistant materials. |
| D. | all of the above |
| Answer» E. | |
| 309. |
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 | |
| 310. |
In grinding irregular, curved, tapered, convex and concave surfaces, the grinder used is |
| A. | cylindrical grinder |
| B. | internal grinder |
| C. | surface grinder |
| D. | tool and cutter grinder |
| Answer» D. tool and cutter grinder | |
| 311. |
Which of the following statement is correct as regard to up milling? |
| A. | It can not be used on old machines due to backlash between the feed screw of the table and the nut. |
| B. | The chips are disposed off easily and do not interfere with the cutting. |
| C. | The surface milled appears to be slightly wavy. |
| D. | The coolant can be poured directly at the cutting zone where the cutting force is maximum. |
| Answer» D. The coolant can be poured directly at the cutting zone where the cutting force is maximum. | |
| 312. |
The cutting angle of a flat drill varies from |
| A. | 3° to 8° |
| B. | 20° to 30° |
| C. | 60° to 90° |
| D. | 90° to 120° |
| Answer» E. | |
| 313. |
For turning internal tapers, 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» D. by swivelling the compound rest | |
| 314. |
Continuous chips with built up edge are formed during machining of |
| A. | brittle metals |
| B. | ductile metals |
| C. | hard metals |
| D. | soft metals |
| Answer» C. hard metals | |
| 315. |
The average cutting speed for turning mild steel 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» C. 60 to 90 m/min | |
| 316. |
Jigs are used |
| A. | for holding and guiding the tool in drilling, reaming or tapping operations |
| B. | for holding the work in milling, grinding, planing or turning operations |
| C. | to check the accuracy of workpiece |
| D. | none of the above |
| Answer» B. for holding the work in milling, grinding, planing or turning operations | |
| 317. |
The vector sum of cutting velocity and chip velocity is __________ shear velocity. |
| A. | equal to |
| B. | less than |
| C. | more than |
| D. | None of these |
| Answer» B. less than | |
| 318. |
Internal or external threads of different pitches can be produced by |
| A. | pantograph milling machine |
| B. | profiling machine |
| C. | planetary milling machine |
| D. | piano-miller |
| Answer» D. piano-miller | |
| 319. |
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. | |
| 320. |
Gear burnishing is a process for |
| A. | surface finishing |
| B. | under-cut gears |
| C. | cycloidal gears |
| D. | removing residual stresses from teeth roots |
| Answer» B. under-cut gears | |
| 321. |
In centreless grinding, work place centre will be |
| A. | above the line joining the two wheel centres |
| B. | below the line joining the two wheel centres |
| C. | on the line joining the two wheel centres |
| D. | at the intersection of the line joining the wheel centres with the work place plane |
| Answer» B. below the line joining the two wheel centres | |
| 322. |
In order to grind soft material |
| A. | coarse grained grinding wheel is used |
| B. | fine grained grinding wheel is used |
| C. | medium grained grinding wheel is used |
| D. | any one of these |
| Answer» B. fine grained grinding wheel is used | |
| 323. |
Gears can be cut on a shaper. |
| A. | Agree |
| B. | Disagree |
| C. | Can't say |
| D. | None of these |
| Answer» B. Disagree | |
| 324. |
Jigs are heavier than fixtures in construction. |
| A. | Yes |
| B. | No |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 325. |
The cutting fluid mostly used for machining steel is |
| A. | water |
| B. | soluble oil |
| C. | dry |
| D. | heavy oils |
| Answer» C. dry | |
| 326. |
Soft materials can not be economically ground due to |
| A. | high temperature involved |
| B. | frequent wheel clogging |
| C. | rapid wheel wear |
| D. | low work piece stiffness |
| Answer» C. rapid wheel wear | |
| 327. |
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. | |
| 328. |
A set of eight form relieved milling cutters for each module is provided to enable cutting of gears of different |
| A. | materials |
| B. | types of gears |
| C. | number of teeth |
| D. | width of gears |
| Answer» D. width of gears | |
| 329. |
An operation of embossing a diamond shaped pattern on the surface of a workpiece, is known as |
| A. | counter-boring |
| B. | grooving |
| C. | knurling |
| D. | facing |
| Answer» D. facing | |
| 330. |
While cutting helical gears on a non-differential gear hobber, the feed change gear ratio is |
| A. | independent of index change gear ratio |
| B. | dependent on speed change gear ratio |
| C. | inter-related to index change gear ratio |
| D. | independent of speed and index change gear ratio |
| Answer» D. independent of speed and index change gear ratio | |
| 331. |
The saw milling is an operation of |
| A. | producing grooves around the periphery of a cylindrical or conical workpiece |
| B. | producing narrow slots or grooves on a workpiece |
| C. | reproduction of an outline of a template on a workpiece |
| D. | machining several surfaces of a workpiece simultaneously |
| Answer» C. reproduction of an outline of a template on a workpiece | |
| 332. |
The swing diameter over the bed is __________ the height of the centre measured from the bed of the lathe. |
| A. | equal to |
| B. | twice |
| C. | thrice |
| D. | one-half |
| Answer» C. thrice | |
| 333. |
In gear hobbing |
| A. | only hob rotates |
| B. | only gear blank rotates |
| C. | both hob and gear blank rotates |
| D. | neither hob nor gear blank rotates |
| Answer» D. neither hob nor gear blank rotates | |
| 334. |
The chamfering 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» B. embossing a diamond shaped pattern on the surface of a workpiece | |
| 335. |
The cutting fluid mostly used for machining alloy steels is |
| A. | water |
| B. | soluble oil |
| C. | dry |
| D. | sulphurised mineral oil |
| Answer» E. | |
| 336. |
The tool material, for faster machining, should have |
| A. | wear resistance |
| B. | red hardness |
| C. | toughness |
| D. | all of these |
| Answer» E. | |
| 337. |
A round nose tool has no back rake and side rake. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» B. Incorrect | |
| 338. |
A drill mainly used in drilling brass, copper or softer materials, is |
| A. | flat drill |
| B. | straight fluted drill |
| C. | parallel shank twist drill |
| D. | tapered shank twist drill |
| Answer» C. parallel shank twist drill | |
| 339. |
The depth of cut in drilling is __________ the drill diameter. |
| A. | equal to |
| B. | one-fourth |
| C. | one-half |
| D. | double |
| Answer» D. double | |
| 340. |
The broaching operation in which either the work or the tool moves across the other, is known as |
| A. | pull broaching |
| B. | push broaching |
| C. | surface broaching |
| D. | continuous broaching |
| Answer» D. continuous broaching | |
| 341. |
The trade name of a non-ferrous cast alloy composed of cobalt, chromium and tungsten is called |
| A. | ceramic |
| B. | stellite |
| C. | diamond |
| D. | cemented carbide |
| Answer» C. diamond | |
| 342. |
The enlarging of an existing circular hole with a rotating single point tool is called |
| A. | boring |
| B. | drilling |
| C. | reaming |
| D. | internal turning |
| Answer» B. drilling | |
| 343. |
A grinding wheel becomes glazed (i.e. cutting edge takes a glass-like appearance) due to |
| A. | wear of bond |
| B. | breaking of abrasive grains |
| C. | wear of abrasive grains |
| D. | cracks on grinding wheel |
| Answer» D. cracks on grinding wheel | |
| 344. |
Flank 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 |
| C. | cutting edge only |
| D. | front face only |
| Answer» B. face of the cutting tool at a short distance from the cutting edge | |
| 345. |
The plain milling machine is more rigid and heavier in construction than a universal milling machine of the same size. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» B. Incorrect | |
| 346. |
The abrasive recommended for grinding materials of low tensile strength is |
| A. | silicon carbide |
| B. | aluminium oxide |
| C. | sand stone |
| D. | diamond |
| Answer» B. aluminium oxide | |
| 347. |
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 | |
| 348. |
The broaching operation in which the work moves past the stationary tool is called |
| A. | pull broaching |
| B. | push broaching |
| C. | surface broaching |
| D. | continuous broaching |
| Answer» E. | |
| 349. |
Crater wear is mainly due to the phenomenon known as |
| A. | adhesion of metals |
| B. | oxidation of metals |
| C. | diffusion of metals |
| D. | all of these |
| Answer» D. all of these | |
| 350. |
The type of reamer used for reaming soft aluminium or copper, is |
| A. | straight fluted reamer |
| B. | left hand spiral fluted reamer |
| C. | right hand spiral fluted reamer |
| D. | any one of these |
| Answer» C. right hand spiral fluted reamer | |