MCQOPTIONS
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MCQOPTIONS
This section includes 843 Mcqs, each offering curated multiple-choice questions to sharpen your Materials Science and Manufacturing Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
If the abrasive grain is viewed as a cutting tool, then which of the following represents the cutting parameters in common grinding operations? |
| A. | Large negative rake angle, low shear angle and high cutting speed |
| B. | Large positive rake angle, low shear angle and high cutting speed |
| C. | Large negative rake angle, high shear angle and low cutting speed |
| D. | Zero negative rake angle, high shear angle and high cutting speed |
| Answer» B. Large positive rake angle, low shear angle and high cutting speed | |
| 252. |
The effects of setting a boring tool above centre height leads to a/an |
| A. | increase in the effective rake angle and a decrease in the effective clearance angle |
| B. | increase in both effective rake angle and effective clearance angle |
| C. | decrease in effective rake angle and an increase in the effective clearance angle |
| D. | decrease in both effective rake angle and effective clearance angle |
| Answer» D. decrease in both effective rake angle and effective clearance angle | |
| 253. |
Consider the following statements with respect to the relief angle of cutting tool: |
| A. | 1 and 2 |
| B. | 2 and 3 |
| C. | 2 and 4 |
| D. | 3 and 4 |
| Answer» C. 2 and 4 | |
| 254. |
In which of the choices given below, the cutting tool materials are placed in the ascending order of permissible cutting speed for machining of steel? |
| A. | K group cemented carbide - P group cemented carbide - Ceramic - Cubic boron nitride |
| B. | Cubic boron nitride - K group cemented carbide - Cubic boron nitride - Ceramic |
| C. | P group cemented carbide - K group cemented carbide - Cubic boron nitride - Ceramic |
| D. | Ceramic - Cubic boron nitride - K group cemented carbide - P group cemented carbide |
| Answer» B. Cubic boron nitride - K group cemented carbide - Cubic boron nitride - Ceramic | |
| 255. |
The cutting portion of a drill is to be welded to its shank. The process best suited for this is |
| A. | ultrasonic welding |
| B. | electron beam welding |
| C. | friction welding |
| D. | laser welding |
| Answer» D. laser welding | |
| 256. |
One brand of milling machining has the following two index plates supplied along with the indexing head. |
| A. | Plate 1: 1 revolution and 9 holes in 18 hole circles |
| B. | Plate 2 :1 revolution and 9 holes in 21 hole circles |
| C. | Plate 2 :1 revolution and 9 holes in 23 hole circles |
| D. | Plate 1 :1 revolution and 9 holes in 15 hole circles |
| Answer» C. Plate 2 :1 revolution and 9 holes in 23 hole circles | |
| 257. |
In the manufacture of twist drills, the shank is joined to the body of the drill using |
| A. | spot welding |
| B. | TIG welding |
| C. | projection welding |
| D. | friction welding |
| Answer» E. | |
| 258. |
Consider the following statements: 1. As the cutting speed increase, the cost of production initially reduces, then after an optimum cutting speed it increases. 2. As the cutting speed increase the cost of production also increases and after a critical value it reduces. 3. Higher feed rate for the same cutting speed reduce cost of production. 4. Higher feed rate for the same cutting speed increases the cost of production. Which of the statements given above are correct? |
| A. | 1 and 3 |
| B. | 2 and 3 |
| C. | 1 and 4 |
| D. | 3 only |
| Answer» B. 2 and 3 | |
| 259. |
A workpiece of 100 cm length and 30 cm width is machined by planning operation with a feed of 0.3 mm/stroke. The machine tool executes 10 double strokes per minute. The planning time for a single pass is |
| A. | 50 min |
| B. | 100 min |
| C. | 166.66 min |
| D. | 333.33 min |
| Answer» C. 166.66 min | |
| 260. |
The final finishing process for the surface plate made of cast iron which is used as a reference surface is |
| A. | Buffing |
| B. | Grinding |
| C. | Hand scraping |
| D. | Honing |
| Answer» B. Grinding | |
| 261. |
The cutting tool material normally used for turning steel of very high hardness is |
| A. | HSS |
| B. | Tungsten carbide |
| C. | CBN |
| D. | Diamond |
| Answer» C. CBN | |
| 262. |
Minimum power requirement (in kW) at a cutting speed of 150 m/min is |
| A. | 2.5 |
| B. | 3.25 |
| C. | 3.35 |
| D. | 3.45 |
| Answer» C. 3.35 | |
| 263. |
Diamond cutting tools are not recommended for machining of ferrous metals to |
| A. | High tool hardness |
| B. | High thermal conductivity of work material |
| C. | Poor tool toughness |
| D. | Chemical affinity of tool material with iron |
| Answer» E. | |
| 264. |
A tool with side cutting edge angle of 30 and end cutting edge angle 10 is used for fine turning with a feed of 1 mm/rev. Neglecting nose radius of the tool, the maximum (peak to valley) height of the surface roughness produced will be |
| A. | 0.16 mm |
| B. | 0.26 mm |
| C. | 0.32 mm |
| D. | 0.48 mm |
| Answer» B. 0.26 mm | |
| 265. |
Which of following gear manufacturing processes is based on generation principle. |
| A. | Gear hobbing |
| B. | Gear shaping |
| C. | Gear milling |
| D. | Gear shaving |
| Answer» B. Gear shaping | |
| 266. |
A gear with 84 teeth is to be machined using a milling process with indexing. The index plate has the following four hole circles: 36, 38, 42, 48. The change gear ratio required is |
| A. | 8/21 |
| B. | 10/21 |
| C. | 21/10 |
| D. | 21/8 |
| Answer» C. 21/10 | |
| 267. |
Brittle materials are machined with tools having zero or negative rake angles because it |
| A. | Results in lower cutting force |
| B. | Improves surface finish |
| C. | Provides adequate strength to cutting forces |
| D. | Results in more accurate dimensions |
| Answer» D. Results in more accurate dimensions | |
| 268. |
Reaming is primarily used for achieving |
| A. | Higher MRR |
| B. | Improved dimensional tolerance |
| C. | Fine surface finish |
| D. | Improved positional tolerance |
| Answer» C. Fine surface finish | |
| 269. |
Shear plane angle (in degrees) for minimum cutting force is |
| A. | 20.5 |
| B. | 28.6 |
| C. | 24.5 |
| D. | 32.5 |
| Answer» E. | |
| 270. |
The diameter of the best wire to measure the effective diameter of metric screw threads of 0.5 mm pitch is.... mm |
| A. | 0.28mm |
| B. | 0.38mm |
| C. | 0.25mm |
| D. | 0.29mm |
| Answer» B. 0.38mm | |
| 271. |
The skid in a stylus type roughness measuring instrument is used to provide... A.... and define .... B.... geometrical profile of the surface. |
| A. | Datum |
| B. | Macro |
| C. | Both A and B |
| D. | None of the above |
| Answer» D. None of the above | |
| 272. |
Which one of the instrument is a comparator |
| A. | Tool makers microscope |
| B. | GO/NOGOgauge |
| C. | Optical interferometer |
| D. | Dial gauge |
| Answer» E. | |
| 273. |
In mass manufacturing, two holes in a plate type of component are ideally located with the help of |
| A. | one solid pin in the larger hole and one diamond pin in the smaller hole |
| B. | two solid pin in either holes |
| C. | two diamond pins in either holes |
| D. | one solid pin in the smaller hole and one demand pin in the larger hole |
| Answer» B. two solid pin in either holes | |
| 274. |
Which of the following powder production methods produces spongy and porous particles? |
| A. | Atomization |
| B. | Reduction of metal oxides |
| C. | Electrolytic deposition |
| D. | Pulverization |
| Answer» C. Electrolytic deposition | |
| 275. |
The geometric tolerance that does not need a datum for its specification is |
| A. | Concentricity |
| B. | Run out |
| C. | Perpendicularity |
| D. | Flatness |
| Answer» E. | |
| 276. |
The effective pitch diameter of the thread is |
| A. | 14.723 |
| B. | 16.705 |
| C. | 17.122 |
| D. | 17.455 |
| Answer» B. 16.705 | |
| 277. |
The best wire size is |
| A. | 1.155 mm |
| B. | 2 mm |
| C. | 2.309 mm |
| D. | 4 mm |
| Answer» B. 2 mm | |
| 278. |
Which one of the following is modeled based on adaptation capabilities of biological systems? |
| A. | Relational database |
| B. | Fuzzy system |
| C. | Simulated annealing algorithm |
| D. | Genetic algorithm |
| Answer» E. | |
| 279. |
A sine bar has a length of 250 mm, each roller has a diameter of 20 mm, during taper angle measurement of a component, the height from the surface plate to the centre of a roller is 100 mm. The calculated taper angle (in degrees) is |
| A. | 21.1 |
| B. | 22.8 |
| C. | 23.6 |
| D. | 68.9 |
| Answer» B. 22.8 | |
| 280. |
Cellular manufacturing is suitable for |
| A. | a single production in large volumes |
| B. | one-off production of several varieties |
| C. | production with similar features made in batches |
| D. | large variety of products in large volumes |
| Answer» D. large variety of products in large volumes | |
| 281. |
For a 3-axes CNC table, the slide along the vertical axis of the table driven by a DC servo motor via lead screw nut mechanism. The lead screw has pitch of 5 mm. This lead screw is fitted with a relative (incremental) circular encoder. The basic length unit (BLU) of the slide along the vertical axis of the table is 0.005 mm. When the table moves along the vertical axis by 9 mm. The corresponding number of pulses generated by the encoder is |
| A. | 1400 |
| B. | 1800 |
| C. | 4200 |
| D. | 9000 |
| Answer» C. 4200 | |
| 282. |
In a CNC feed drive, a stepper motor with step angle of 1.8 degree drives a lead screw with pitch of 2 mm. The basic length unit (BLU) for this drive is |
| A. | 10 microns |
| B. | 20 microns |
| C. | 40 microns |
| D. | 100 microns |
| Answer» B. 20 microns | |
| 283. |
The interpolator in a CNC machine controls |
| A. | Spindle speed |
| B. | Coolant flow |
| C. | Feed rate |
| D. | Tool change |
| Answer» D. Tool change | |
| 284. |
The type of coated electrode most widely used for welding low carbon steel is |
| A. | cellulose |
| B. | acidic |
| C. | rutile |
| D. | oxide |
| Answer» D. oxide | |
| 285. |
An autocollimator is used to |
| A. | Measure small angular displacements on flat surfaces |
| B. | Compare known and unknown dimensions |
| C. | Measure the flatness error |
| D. | Measure roundness error between enters |
| Answer» D. Measure roundness error between enters | |
| 286. |
In deep drawing of sheet metal, spring-loaded stripper clamps the work until: |
| A. | The punch penetrates twice the stock thickness |
| B. | It removes wrinkles on the product edges |
| C. | Shedder removes the work from the tools |
| D. | Punch is completely withdrawn from the work material |
| Answer» C. Shedder removes the work from the tools | |
| 287. |
The least count of a 200 mm long spirit level is given as 10 sec per division. The gradient of the spirit level expressed as mm over one meter is |
| A. | 0.048mm |
| B. | 1.048mm |
| C. | - 1.048mm |
| D. | 0.48mm |
| Answer» B. 1.048mm | |
| 288. |
Abbe's principle of alignment is used in measurements made in ______ . |
| A. | Screw threads |
| B. | Nail threads |
| C. | Both A and B |
| D. | None of the above |
| Answer» B. Nail threads | |
| 289. |
Assertion (A): End standards are used for precision component inspection. |
| A. | Both A and R are correct and R explains A |
| B. | Both A and R are true but R not explains A |
| C. | A is true but R is false |
| D. | A is false but R is true |
| Answer» D. A is false but R is true | |
| 290. |
Tool life in the 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 | |
| 291. |
Assertion (A): Grinding needs higher specific cutting energy than milling. Reason |
| A. | Both A and R are true and R is the correct explanation of A |
| B. | Both A and R are true but R is not a correct explanation of A |
| C. | A Is true but R is false |
| D. | A is false but R is true |
| Answer» D. A is false but R is true | |
| 292. |
Which one of the following welding methods provides the highest heat flux(W/mm )? |
| A. | Tungsten inert gas welding |
| B. | Laser beam welding |
| C. | Oxyacetylene gas welding |
| D. | Plasma arc welding |
| Answer» C. Oxyacetylene gas welding | |
| 293. |
The joint configuration best suited for adhesive bonding is |
| A. | butt |
| B. | fillet |
| C. | lap |
| D. | spot |
| Answer» D. spot | |
| 294. |
Brazing Is the non-fusion method of joining dissimilar metals with metals whose melting temperature is greater than 400 C. |
| A. | True |
| B. | False |
| C. | NA |
| D. | NA |
| Answer» B. False | |
| 295. |
In metal cutting with a carbide tool, at the maximum recommended speed, the largest % of heat generated goes to be |
| A. | tool |
| B. | chip |
| C. | work |
| D. | tool post |
| Answer» C. work | |
| 296. |
A blind hole is better tapped with a tap having |
| A. | right hand flutes |
| B. | left hand flutes |
| C. | straight flutes |
| D. | no flutes |
| Answer» B. left hand flutes | |
| 297. |
In a surface broaching process, a broach having 5 mm pitch and cut per teeth 0.05 mm is used for reducing the thickness by 6 mm. If the length of the workpiece is 50 mm and the cutting speed is 0.5 m/s, the time required/pass in second is |
| A. | 1.1 |
| B. | 1.2 |
| C. | 1.3 |
| D. | 1200 |
| Answer» D. 1200 | |
| 298. |
In metal forming operation, the true strain in the X-direction is 0.3 and in the Y-direction 0.1. The true strain in the Z-direction is |
| A. | 0 |
| B. | 0.2 |
| C. | 0.2 |
| D. | 0.03 |
| Answer» C. 0.2 | |
| 299. |
In sheet metal working, the spring back increase when P. Ratio of bend radius to sheet thickness is small Q. Young's modulus of the sheet is low R. Yieid strength of the sheet is high S. Tension is applied during bending |
| A. | P, Q, R |
| B. | Q, R |
| C. | P, Q, S |
| D. | P, R, S |
| Answer» B. Q, R | |
| 300. |
The power required for the drawing process (in kW) is |
| A. | 8.97 |
| B. | 14.0 |
| C. | 17.95 |
| D. | 28.0 |
| Answer» B. 14.0 | |