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.
| 301. |
Circular blanks of 35 mm dia are punched from a steel sheet of 2 mm thickness. If the clearance per side between the punch and die is to be kept as 40 microns. The sizes of punch and die should respectively be |
| A. | 35 and 35.040 |
| B. | 34.92 and 35 |
| C. | 35 and 35.080 |
| D. | 35.040 and 34.92 |
| Answer» C. 35 and 35.080 | |
| 302. |
The required blank diameter is |
| A. | 86.7 mm |
| B. | 119.5 mm |
| C. | 121.24 mm |
| D. | 169 mm |
| Answer» D. 169 mm | |
| 303. |
At 1000 C the crystallographic structure of iron is _______. |
| A. | due to Austenitic structure. |
| B. | due to crystallographic structure. |
| C. | FCC due to crystallographic structure. |
| D. | FCC due to Austenitic structure. |
| Answer» E. | |
| 304. |
At the last hammer stroke the excess material from the finishing cavity of a forging die is pushed into _______. |
| A. | Gulter is provided in finishing stroke. |
| B. | hammer is provided in finishing stroke. |
| C. | hammer |
| D. | stroke |
| Answer» B. hammer is provided in finishing stroke. | |
| 305. |
Plain milling of mild steel plates produces |
| A. | irregular shaped discontinuous chips |
| B. | regular shaped discontinuous chips |
| C. | continuous chips without BUE |
| D. | jointed chips |
| Answer» C. continuous chips without BUE | |
| 306. |
Cutting speed in grinding is set to a high value to |
| A. | Reduce the cutting time |
| B. | Increase the bond strength |
| C. | Improve cooling of job and wheel |
| D. | Reduce the wheel wear |
| Answer» B. Increase the bond strength | |
| 307. |
The standard specification of a grinding wheel is A-46-M-6-V-21. It means a wheel of |
| A. | Aluminum oxide of mesh size 6 |
| B. | Boron carbide of mesh size 46 |
| C. | Aluminum oxide of mesh size 46 |
| D. | Silicon carbide of mesh size 6 |
| Answer» D. Silicon carbide of mesh size 6 | |
| 308. |
A cylindrical cup of 48.5 mm diameter and 52 mm height has a corner radius of 1.5 mm. Cold rolled steel sheet of thickness 1.5 mm is used to produce the cup. Assume trim allowance as 2 mm per 25 mm of cup diameter. What is the blank size in mm? |
| A. | 102.0 |
| B. | 115.4 |
| C. | 120.5 |
| D. | 128.5 |
| Answer» C. 120.5 | |
| 309. |
Two identical cylindrical jobs are turned using |
| A. | 0.0001, 0.024 |
| B. | 0.0002, 0.012 |
| C. | 0.0003, 0.024 |
| D. | 0.0004, 0.012 |
| Answer» E. | |
| 310. |
Tool life equations for two tools under consideration are as follows |
| A. | 54 m/min |
| B. | 150 m/min |
| C. | 194 m/min |
| D. | 250 m/min |
| Answer» B. 150 m/min | |
| 311. |
In an interchangeable assembly,a shaft of 20 |
| A. | 40 microns |
| B. | 30 microns |
| C. | 25 microns |
| D. | 15 microns |
| Answer» C. 25 microns | |
| 312. |
Match the processes with their characteristics. |
| A. | P-2, Q-3, R-1, S-4 |
| B. | P-3, Q-2, R-1, S-4 |
| C. | P-3, Q-2, R-4, S-1 |
| D. | P-2, Q-4, R-3, S-1 |
| Answer» B. P-3, Q-2, R-1, S-4 | |
| 313. |
During the execution of a CNC part program block |
| A. | circular Interpolation - clockwise |
| B. | circular Interpolation - counterclockwise |
| C. | linear Interpolation |
| D. | rapid feed |
| Answer» B. circular Interpolation - counterclockwise | |
| 314. |
Appropriate instrument to check the flatness of slip gauge is |
| A. | dial indicator |
| B. | pneumatic comparator |
| C. | optical interferometer |
| D. | tool makers microscope with projection facility |
| Answer» D. tool makers microscope with projection facility | |
| 315. |
Diamond wheels should not be used for grinding steel components (T/F) |
| A. | True |
| B. | False |
| C. | NA |
| D. | NA |
| Answer» B. False | |
| 316. |
The atomic packing factor for a material with body centered cubic structure is _______ . |
| A. | APF = 0.68 |
| B. | APF = 1.68 |
| C. | APF = 0.78 |
| D. | APF = - 1.68 |
| Answer» B. APF = 1.68 | |
| 317. |
Shell moulding is an investment casting process (T/F) |
| A. | False |
| B. | True |
| C. | NA |
| D. | NA |
| Answer» B. True | |
| 318. |
Bentonite is commonly used bonding material for dry sand cores |
| A. | Bentonite is an additive. |
| B. | Bentonite is an non-additive. |
| C. | Both A and B |
| D. | None of the above |
| Answer» B. Bentonite is an non-additive. | |
| 319. |
Electrical switches made out of thermoset materials are produced by |
| A. | Compression moulding |
| B. | Transfer moulding |
| C. | Injection moulding |
| D. | Vacuum moulding |
| Answer» B. Transfer moulding | |
| 320. |
Investment casting uses... A as pattern material and is preferred for small parts with .... B ____designs. A. wax/resin coated sand B. simple/intricate |
| A. | A. wax B. intricate |
| B. | B. wax A. intricate |
| C. | A. wax B. |
| D. | B. wax A. |
| Answer» B. B. wax A. intricate | |
| 321. |
Neglecting friction and strain hardening, the stress required for drawing (in MPa) is |
| A. | 178.6 |
| B. | 357.0 |
| C. | 1287.5 |
| D. | 2575.0 |
| Answer» C. 1287.5 | |
| 322. |
The number of atoms per unit cell and the number of slip systems, respectively, for a facecentered cubic (FCC) crystal are |
| A. | 3, 3 |
| B. | 3, 12 |
| C. | 4, 12 |
| D. | 4 ,48 |
| Answer» D. 4 ,48 | |
| 323. |
Hot chamber die casting is not suited for |
| A. | Lead and its alloys |
| B. | Zinc and its alloys |
| C. | Tin and it's alloys |
| D. | Aluminum and its alloys |
| Answer» B. Zinc and its alloys | |
| 324. |
In hollow cylindrical parts made by centrifugal castings, the density of the part is |
| A. | Maximum at the outer region |
| B. | Maximum at the inner region |
| C. | Maximum at the mid point between outer and inner surfaces |
| D. | Uniform throughout |
| Answer» D. Uniform throughout | |
| 325. |
Two streams of liquid metal which are not hot enough to fuse properly result into a casting defect known -as |
| A. | cold shut |
| B. | swell |
| C. | sand wash |
| D. | scab |
| Answer» C. sand wash | |
| 326. |
Which of the following casting processes uses expandable pattern and expandable mould? |
| A. | Shell mould casting |
| B. | Investment casting |
| C. | Pressure die casting |
| D. | Centrifugal casting |
| Answer» B. Investment casting | |
| 327. |
In sand casting fluidly of the molten metal increases with |
| A. | Increase in degree of superheat |
| B. | Decrease in pouring rate |
| C. | Increase in thermal conductivity of the mould |
| D. | Increase in sand grain size |
| Answer» E. | |
| 328. |
A round billet made of brass is to be extruded (extrusion constant = 250 MPa) at 700 C. The billet diameter is 100 mm and the diameter of the extrusion is 50 mm. The extrusion force required (in MN) is |
| A. | 1.932 |
| B. | 2.722 |
| C. | 3.423 |
| D. | 4.650 |
| Answer» C. 3.423 | |
| 329. |
Manufacturing process |
| A. | A 1, B 5, C 4, D 2 |
| B. | A 2, B 5, C 4, D 1 |
| C. | A 4, B 5, C 1, D 2 |
| D. | A 1, B 4, C 5, D 2 |
| Answer» B. A 2, B 5, C 4, D 1 | |
| 330. |
Collapsible tubes are made by |
| A. | Drawing |
| B. | Spinning |
| C. | Extrusion |
| D. | Rolling |
| Answer» D. Rolling | |
| 331. |
The true stress (in MPa) versus true strain relationship for a metal is given by = 1020 |
| A. | 67.032 mm |
| B. | - 67.032 mm |
| C. | 68.032 mm |
| D. | 66.032 mm |
| Answer» B. - 67.032 mm | |
| 332. |
A steel wire is drawn from an initial diameter (di) of 10 mm to a final diameter (d |
| A. | 316.25 MPa |
| B. | - 316.25 MPa |
| C. | 314.25 MPa |
| D. | 315.25 MPa |
| Answer» B. - 316.25 MPa | |
| 333. |
The maximum reduction in cross-sectional area per pass (R) of a cold wire drawing process is R = 1 e |
| A. | 0.865 |
| B. | 0.826 |
| C. | 0.777 |
| D. | 0.632 |
| Answer» E. | |
| 334. |
Low permeability moulds and low pouring temp of the molten metal causes blow holes. Defect in castings.(T/F) |
| A. | True |
| B. | False |
| C. | NA |
| D. | NA |
| Answer» B. False | |
| 335. |
Poor collapsibility of the mould leads to distortion cracks type of casting defect in aluminium castings. (T/F) |
| A. | True |
| B. | False |
| C. | NA |
| D. | NA |
| Answer» D. NA | |
| 336. |
A bar is compressed to half of its original length. The magnitude of true strain produced in the deformed bar is (correct to two decimal places). |
| A. | - 0.6932 |
| B. | - 1.6932 |
| C. | 0.6932 |
| D. | 1.6932 |
| Answer» B. - 1.6932 | |
| 337. |
The extrusion processes used for the production of toothpaste tubes is/are |
| A. | 1 only |
| B. | 1 and 2 |
| C. | 2 and 3 |
| D. | 3 only |
| Answer» E. | |
| 338. |
Semi brittle materials can be extruded by |
| A. | impact extrusion |
| B. | closed cavity extrusion |
| C. | hydrostatic extrusion |
| D. | backward extrusion |
| Answer» D. backward extrusion | |
| 339. |
Forces in hot extrusion is a function of the strain hardening component of the billet material. (T/F) |
| A. | False |
| B. | True |
| C. | NA |
| D. | NA |
| Answer» B. True | |
| 340. |
Seamless long steel tubes are manufactured by rolling, drawing and __________. |
| A. | Extrusion & Tube piercing. |
| B. | Tube piercing. |
| C. | Steel & Tube piercing. |
| D. | None of these |
| Answer» B. Tube piercing. | |
| 341. |
Which one of the following is not a property of a sand mould? |
| A. | Permeability |
| B. | Collapsibility |
| C. | Strength |
| D. | Fluidity |
| Answer» E. | |
| 342. |
In a two-stage wire drawing operation, the fractional reduction (ratio of change in crosssectional area to initial cross-sectional area) in the first stage is 0.4. The fractional reduction in the second stage is 0.3. The overall fractional reduction is |
| A. | 0.24 |
| B. | 0.58 |
| C. | 0.60 |
| D. | 1.00 |
| Answer» C. 0.60 | |
| 343. |
In a wire drawing operation, diameter of a Steel wire is reduced from 10 mm to 8 mm. The mean flow stress of the material is 400 MPa. The ideal force required for drawing (ignoring friction and redundant work) is |
| A. | 4.48 kN |
| B. | 8.97 kN |
| C. | 20.11 kN |
| D. | 31.41 kN |
| Answer» C. 20.11 kN | |
| 344. |
Match the following Process |
| A. | P 3, a 4, R 2, S1 |
| B. | P 4, a 3, R 2, S1 |
| C. | P 1, a 4, R 2, S3 |
| D. | P 2, a 4, R 3, S1 |
| Answer» B. P 4, a 3, R 2, S1 | |
| 345. |
Machining process job |
| A. | A 2, B 3, C 1, D 4 |
| B. | A 4, B 2, C 1, D 3 |
| C. | A 4, B 2, C 1, D 3 |
| D. | A 4, B 3, C 1, D 2 |
| Answer» E. | |
| 346. |
Spot welding of two 1 mm thick sheets of steel (density = 8000 kg/m ) is carried out successfully by passing a certain amount of current for 0.1 second through the electrodes. The resultant weld nugget formed is 5 mm in diameter and 1.5 mm thick. If the latent heat of fusion of steel is 1400 kJ/kg and the effective resistance in the welding operation is 200 -ohms, the current passing through the electrodes is approximately |
| A. | 1480 A |
| B. | 3300 A |
| C. | 4060 A |
| D. | 9400 A |
| Answer» D. 9400 A | |
| 347. |
Filler material is.... A... in resistance welding and the heat generated in the process is directly proportional to.... B.... |
| A. | used/not used |
| B. | square of the current/cube of the current |
| C. | cube of the current |
| D. | not used |
| E. | None of these |
| Answer» F. | |
| 348. |
In resistance welding, heat is generated due to the resistance between |
| A. | electrode and workpiece |
| B. | asperities between touching plates |
| C. | two dissimilar metals being in contact |
| D. | interatomic forces |
| Answer» C. two dissimilar metals being in contact | |
| 349. |
Autogeneous gas tungsten arc welding of a steel plate is carried out with welding current of 500 A. Voltage of 20 V and weld speed of 20 mm/ min. Consider the heat transfer efficiency from the arc to the weld pool as 90%. The heat input per unit length (in kJ/mm) is |
| A. | 27 |
| B. | 35 |
| C. | 45 |
| D. | 55 |
| Answer» B. 35 | |
| 350. |
In an orthogonal machining with a tool of 9 orthogonal rake angle, the uncut chip thickness is 0.2 mm. The chip thickness fluctuates between 0.25 mm and 0.4 mm. The ratio of the maximum shear angle to the minimum shear angle during machining is______. |
| A. | 1.487 |
| B. | 1.499 |
| C. | 1.494 |
| D. | 1.490 |
| Answer» D. 1.490 | |