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.
| 251. |
The continuous chips are in the form of long coils having the same thickness throughout. |
| A. | Agree |
| B. | Disagree |
| C. | Can't say |
| D. | None of these |
| Answer» B. Disagree | |
| 252. |
Tool life is measured by the |
| A. | number of pieces machined between tool sharpenings |
| B. | time the tool is in contact with the job |
| C. | volume of material removed between tool sharpenings |
| D. | all of the above |
| Answer» E. | |
| 253. |
The usual value of the point angle of a drill is |
| A. | 70° |
| B. | 100° |
| C. | 118° |
| D. | 130° |
| Answer» D. 130° | |
| 254. |
The cutting speed for drilling copper with high speed steel drills varies from |
| A. | 10 to 20 m/min |
| B. | 18 to 30 m/min |
| C. | 24 to 45 m/min |
| D. | 60 to 90 m/min |
| Answer» C. 24 to 45 m/min | |
| 255. |
In reaming process |
| A. | metal removal rate is high |
| B. | high surface finish is obtained |
| C. | high form accuracy is obtained |
| D. | high dimensional accuracy is obtained |
| Answer» D. high dimensional accuracy is obtained | |
| 256. |
In hot machining, solid carbide tools are preferred over high speed steel tools. |
| A. | True |
| B. | False |
| C. | Can't say |
| D. | None of these |
| Answer» B. False | |
| 257. |
In a planer |
| A. | tool is stationary and work reciprocates |
| B. | work is stationary and tool reciprocates |
| C. | tool moves over stationary work |
| D. | tool moves over reciprocating work |
| Answer» B. work is stationary and tool reciprocates | |
| 258. |
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 | |
| 259. |
In lapping operaion, 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 | |
| 260. |
The shear velocity is the velocity of |
| A. | tool relative to the workpiece |
| B. | chip relative to the tool |
| C. | tool along the tool face |
| D. | none of these |
| Answer» E. | |
| 261. |
Climb milling is chosen while machining because |
| A. | the chip thickness increase gradually |
| B. | it enables the cutter to dig in and start the cut |
| C. | the specific power consumption is reduced |
| D. | better surface finish can be obtained |
| Answer» C. the specific power consumption is reduced | |
| 262. |
To grind brittle materials, a coarse grained grinding wheel is used. |
| A. | Agree |
| B. | Disagree |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 263. |
Any number of equal divisions can be obtained on milling machine by |
| A. | direct indexing |
| B. | simple indexing |
| C. | compound indexing |
| D. | differential indexing |
| Answer» C. compound indexing | |
| 264. |
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. | |
| 265. |
The process of removing metal by a cutter which is rotated against the direction of travel of workpiece, is called |
| A. | up milling |
| B. | down milling |
| C. | face milling |
| D. | end milling |
| Answer» B. down milling | |
| 266. |
High speed steel cutting tools operate at cutting speeds __________ than carbon steel tools. |
| A. | 2 to 3 times lower |
| B. | 2 to 3 times higher |
| C. | 5 to 8 times higher |
| D. | 8 to 20 times higher |
| Answer» C. 5 to 8 times higher | |
| 267. |
The abrasive slurry used in ultra-sonic machining contains fine particles of |
| A. | aluminium oxide |
| B. | boron carbide |
| C. | silicon carbide |
| D. | any one of these |
| Answer» E. | |
| 268. |
In a shaper, the metal is removed during |
| A. | forward stroke |
| B. | return stroke |
| C. | both the forward and return strokes |
| D. | neither the forward nor the return stroke |
| Answer» B. return stroke | |
| 269. |
The main purpose of a boring operation, as compared to drilling, is to |
| A. | drill a hole |
| B. | finish the drilled hole |
| C. | correct the hole |
| D. | enlarge the existing hole |
| Answer» E. | |
| 270. |
In drilling softer materials, the cutting speed is __________ as compared to harder materials. |
| A. | same |
| B. | low |
| C. | high |
| D. | None of these |
| Answer» D. None of these | |
| 271. |
The point angle of a drill, for drilling stainless steel, is |
| A. | 90° |
| B. | 118° |
| C. | 135° |
| D. | 150° |
| Answer» D. 150° | |
| 272. |
The aluminium oxide abrasive is chiefly used for grinding |
| A. | high speed steel |
| B. | carbon steel |
| C. | wrought iron |
| D. | all of these |
| Answer» E. | |
| 273. |
The factor responsible for the formation of continuous chips with built up edge 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 | |
| 274. |
A 15 mm drilling machine means that it can drill a hole |
| A. | ofmaximumdiameter 15 mm |
| B. | in 15 mm thick plates |
| C. | having cross-sectional area of 15 mm² |
| D. | none of these |
| Answer» B. in 15 mm thick plates | |
| 275. |
A process of removing metal by pushing or pulling a cutting tool is called |
| A. | up milling |
| B. | down milling |
| C. | forming |
| D. | broaching |
| Answer» E. | |
| 276. |
The size of abrasive grain required in a grinding wheel depends upon the |
| A. | amount of material to be removed |
| B. | hardness of material being ground |
| C. | finish desired |
| D. | all of these |
| Answer» C. finish desired | |
| 277. |
A __________ grinding wheel is used to grind soft materials. |
| A. | coarse grained |
| B. | medium grained |
| C. | finegrained |
| D. | None of these |
| Answer» B. medium grained | |
| 278. |
When the end of a tap is tapered for about three or four threads, it is known as a |
| A. | taper tap |
| B. | bottoming tap |
| C. | second tap |
| D. | none of these |
| Answer» D. none of these | |
| 279. |
The relation between the tool life (T) in minutes and cutting speed (V) in m/min is (where n = An exponent, which depends upon the tool and workpiece, and C = A constant) |
| A. | VnT = C |
| B. | VTn = C |
| C. | Vn/T = C |
| D. | V/Tn = C |
| Answer» C. Vn/T = C | |
| 280. |
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 | |
| 281. |
For softer materials, the point angle of the drill is kept |
| A. | equal to 118° |
| B. | less than 118° |
| C. | more than 118° |
| D. | any one of these |
| Answer» C. more than 118° | |
| 282. |
The cutting speed is zero at the periphery and it is maximum at the centre of the drill. |
| A. | Yes |
| B. | No |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 283. |
A fine grained grinding wheel is used to grind |
| A. | hard and brittle materials |
| B. | soft and ductile materials |
| C. | hard and ductile materials |
| D. | soft and brittle materials |
| Answer» B. soft and ductile materials | |
| 284. |
A tool used to withdraw a drill from the sleeve is called |
| A. | drill remover |
| B. | drill puller |
| C. | drift |
| D. | drill drawer |
| Answer» D. drill drawer | |
| 285. |
A dynamometer is a device used for the measurement of |
| A. | chip thickness ratio |
| B. | forces during metal cutting |
| C. | wear of the cutting tool |
| D. | deflection of the cutting tool |
| Answer» C. wear of the cutting tool | |
| 286. |
The angle between the face of the tool and a line tangent to the machined surface at the cutting point is called cutting angle. |
| A. | Correct |
| B. | Incorrect |
| C. | Can't say |
| D. | None of these |
| Answer» B. Incorrect | |
| 287. |
The method of centreless grinding used to produce taper is |
| A. | infeed grinding |
| B. | through feed grinding |
| C. | endfeed grinding |
| D. | any one of these |
| Answer» D. any one of these | |
| 288. |
It is required to cut screw threads of 2 mm pitch on a lathe. The lead screw has a pitch of 6 mm. If the spindle speed is 60 r.p.m., then the speed of lead screw will be |
| A. | 10 r.p.m. |
| B. | 20 r.p.m. |
| C. | 120 r.p.m. |
| D. | 180 r.p.m. |
| Answer» C. 120 r.p.m. | |
| 289. |
A twist drill is specified by its |
| A. | shank, material and diameter |
| B. | shank, lip angle and size of flute |
| C. | material, length of body and helix angle |
| D. | any one of these |
| Answer» B. shank, lip angle and size of flute | |
| 290. |
The relief or clearance at the cutting edge of a flat drill varies from |
| A. | 3° to 8° |
| B. | 20° to 30° |
| C. | 60° to 90° |
| D. | 90° to 120° |
| Answer» B. 20° to 30° | |
| 291. |
In American Standard Association (A S A) system, if the tool nomenclature is 8-6-5-5-10-15-2 mm, then the side rake angle will be |
| A. | 5° |
| B. | 6° |
| C. | 8° |
| D. | 10° |
| Answer» C. 8° | |
| 292. |
It is desired to perform the operations like drilling, reaming, counter-boring etc. on a work piece. Which of the following machine will be used? |
| A. | Sensitive drilling machine |
| B. | Radial drilling machine |
| C. | Gang drilling machine |
| D. | Multiple spindle drilling machine |
| Answer» D. Multiple spindle drilling machine | |
| 293. |
The specific cutting energy used for establishing the machinability of the metal depends upon its |
| A. | coefficient of friction |
| B. | microstructure |
| C. | work hardening characteristics |
| D. | all of these |
| Answer» E. | |
| 294. |
The cutting speed of a drill depends upon the |
| A. | material of drill |
| B. | type of material to be drilled |
| C. | quality of surface finish desired |
| D. | all of these |
| Answer» E. | |
| 295. |
The angle made by the face of the tool and the plane parallel to the base of cutting tool is called |
| A. | rake angle |
| B. | cutting angle |
| C. | clearance angle |
| D. | lip angle |
| Answer» B. cutting angle | |
| 296. |
A dense structure of a grinding wheel is denoted by the number 9 to 15 or higher. |
| A. | Yes |
| B. | No |
| C. | Can't say |
| D. | None of these |
| Answer» C. Can't say | |
| 297. |
In a plain milling cutter, the portion of the gash adjacent to the cutting edge on which the chip impinges is called |
| A. | face |
| B. | fillet |
| C. | land |
| D. | lead |
| Answer» B. fillet | |
| 298. |
The cutting speed is minimum while machining __________ with a high speed steel tool. |
| A. | cast iron |
| B. | mild steel |
| C. | brass |
| D. | aluminium |
| Answer» B. mild steel | |
| 299. |
In which of the following milling machine, the table can be tilted in a vertical plane by providing a swivel arrangement at the knee? |
| A. | Universal milling machine |
| B. | Plain milling machine |
| C. | Omniversal milling machine |
| D. | Hand milling machine |
| Answer» D. Hand milling machine | |
| 300. |
Which of the following operation is first performed? |
| A. | Spot facing |
| B. | Boring |
| C. | Tapping |
| D. | Drilling |
| Answer» C. Tapping | |