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.
| 451. |
Consider a linear elastic rectangular thin sheet of metal, subjected to uniform uni-axial tensile stress of 100 MPa along the length direction. Assume plane stress condition in the plane normal to the thickness. The Young s modulus E = 200 MPa and Poisson s ratio = 0.3 are given. The principal strains in the plane of the sheet are |
| A. | (0.5, 0.15) |
| B. | (0.5, 0.0) |
| C. | (0.35, 0.15) |
| D. | (0.5, 0.5) |
| Answer» B. (0.5, 0.0) | |
| 452. |
Heat (in Joules) used for production weld nugget will be (assuming 100% heat transfer efficiency) |
| A. | 324 |
| B. | 334 |
| C. | 344 |
| D. | 354 |
| Answer» D. 354 | |
| 453. |
Aluminium strips of 2 mm thickness are joined together by resistance spot welding process by applying an electric current 6000 A and 0.15 second. The heat required for melting aluminium is 2.9 J/mm |
| A. | 28 |
| B. | 35 |
| C. | 65 |
| D. | 72 |
| Answer» C. 65 | |
| 454. |
Two 8 mm thick steel plates are placed 5 mm apart and welded by a butt joint. Welding is carried out at 20 V and speed of 5 mm/s. Heat transfer efficiency is 0.80. If the heat required to melt steel is 10 J/mm |
| A. | 100 |
| B. | 200 |
| C. | 300 |
| D. | 400 |
| Answer» C. 300 | |
| 455. |
Consider the following statements: The magnitude of residual stresses in welding depends upon |
| A. | 1, 2 and 4 |
| B. | 1, 2 and 3 |
| C. | 1 and 3 |
| D. | 2 and 3 |
| Answer» C. 1 and 3 | |
| 456. |
A 900 mm long steel plate is welded by manual metal arc welding process using welding current of 150 A, arc voltage of 20 V and welding speed of 300 mm/min. If the process efficiency of is 0.8 and surface resistance is 36 micro-ohm, the heat input in J/mm |
| A. | 600 J/mm |
| B. | 480 J/mm |
| C. | 146 J |
| D. | 116.5 J |
| Answer» C. 146 J | |
| 457. |
A cup of 10 cm height and 5 cm diameter is to be made from a sheet metal of 2 mm thickness. The number of deductions necessary will be |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Four |
| Answer» D. Four | |
| 458. |
The process of hot extrusion is used to produce |
| A. | Curtain rods made of aluminium |
| B. | Steel pipes of domestic water supply |
| C. | Stainless steel tubes used in furniture |
| D. | Large size pipes used in city water mains |
| Answer» B. Steel pipes of domestic water supply | |
| 459. |
For wire drawing operation, the work material should essentially be |
| A. | ductile |
| B. | tough |
| C. | hard |
| D. | malleable |
| Answer» B. tough | |
| 460. |
Wrinkling is a common defect found is |
| A. | Bent components |
| B. | Deep drawn components |
| C. | Embossed components |
| D. | Blanked component |
| Answer» C. Embossed components | |
| 461. |
To stress relieve a cold worked steel part, it is heated to a temperature close to.... A... and grain obtained after cooling are... B. |
| A. | A-upper critical temp B-coarser |
| B. | A-lower critical temperature B-causer |
| C. | A-upper critical temp B-fine |
| D. | None of these |
| Answer» B. A-lower critical temperature B-causer | |
| 462. |
Hot die steel, used for large solid dies in drop forging, should necessarily have |
| A. | high strength and high copper content |
| B. | high hardness and low harden ability |
| C. | high toughness and low thermal conductivity |
| D. | high hardness and high thermal conductivity |
| Answer» D. high hardness and high thermal conductivity | |
| 463. |
Pressure die casting deals with casting metals of relatively _____ A ____ melting point and provides _____B. production rate > A. higher/ lower B. higher /lower |
| A. | A lower B higher |
| B. | A higher B higher |
| C. | A higher B lower |
| D. | A lower B lower |
| Answer» B. A higher B higher | |
| 464. |
Ceramics slurry is used in making the moulds for |
| A. | investment casting |
| B. | die casting |
| C. | shell mould casting |
| D. | centrifugal casting |
| Answer» B. die casting | |
| 465. |
For the same material, powder metallurgy process in superior to casting for |
| A. | making large products |
| B. | better control over the density of product |
| C. | better strength of the finished product |
| D. | making parts with wide variations of thickness at different sections |
| Answer» B. better control over the density of product | |
| 466. |
The combination of slip gauges to obtain a dimension of 10.35 mm will be |
| A. | 10.00 + 0.30 + 0.05 |
| B. | 8.00 + 1.30 + 1.05 |
| C. | 10.00 + 0.35 |
| D. | 5.00 + 4.00 + 1.00 + 0.35 |
| Answer» C. 10.00 + 0.35 | |
| 467. |
The exponent (n) and constant (k) of the Taylor's tool life equation are |
| A. | n = 0.5. and k = 540 |
| B. | n = 1 and k = 4860 |
| C. | n = 1 and k = 0.74 |
| D. | n = 0.5 and k = 1.155 |
| Answer» B. n = 1 and k = 4860 | |
| 468. |
The cutting and thrust forces, respectively, are |
| A. | 568 N; 387 N |
| B. | 565 N; 381 N |
| C. | 440 N; 342 N |
| D. | 480 N; 356 N |
| Answer» C. 440 N; 342 N | |
| 469. |
The process by which shell like casting (like toys) are made is |
| A. | Shell moulding |
| B. | Centrifugal casting |
| C. | Slush casting |
| D. | Die casting |
| Answer» E. | |
| 470. |
The shear plane angle (in degrees) and the shear force respectively are |
| A. | 52; 320 N |
| B. | 52; 400 N |
| C. | 28; 400 N |
| D. | 28; 320 N |
| Answer» E. | |
| 471. |
A hole is of dimension 9 |
| A. | loose running fit |
| B. | close running fit |
| C. | transition fit |
| D. | interference fit |
| Answer» D. interference fit | |
| 472. |
In a single point turning tool, the side rake angle and orthogonal rake angle are equal. is the principal cutting edge angle and its range is 0 90 . The chip flows in the orthogonal plane. The value of is closest to |
| A. | 0 |
| B. | 45 |
| C. | 60 |
| D. | 90 |
| Answer» E. | |
| 473. |
In a single pass drilling operation, a through hole of 15 mm diameter is to be drilled in a steel plate of 50 mm thickness. Drill spindle speed is 500 rpm, feed is 0.2 mm/rev and drill point angle is 118 , Assuming 2 mm clearance at approach and exit, the total drill time (in seconds) is |
| A. | 35.1 |
| B. | 32.4 |
| C. | 31.2 |
| D. | 30,1 |
| Answer» B. 32.4 | |
| 474. |
A single-point cutting tool with 12 rake angle is used to machine a steel work-piece. The depth of cut, i.e. uncut thickness is 0.81 mm. The chip thickness under orthogonal machining condition is 1.8 mm. The shear angle is approximately |
| A. | 22 |
| B. | 26 |
| C. | 56 |
| D. | 76 |
| Answer» C. 56 | |
| 475. |
A single point cutting tool with 12 rake angle is used for orthogonal machining of a ductile material. The shear plane angle for the theoretically minimum possible shear strain to occur |
| A. | 51 |
| B. | 45 |
| C. | 30 |
| D. | None of these |
| Answer» B. 45 | |
| 476. |
lf the number of double strokes per minute in a shaper is calculated by (0.643 Cutting speed in mm/min)/length of the stroke in m. Then the return speed is faster than the cutting speed by |
| A. | 40% |
| B. | 60% |
| C. | 80% |
| D. | 100% |
| Answer» B. 60% | |
| 477. |
Taylor s tool life equation is given by VT |
| A. | 50 m/min |
| B. | 40 m/min |
| C. | 45 m/min |
| D. | 41 m/min |
| Answer» C. 45 m/min | |
| 478. |
Taylor's tool life equation is used to estimate the life of a batch of identical HSS twist drills by drilling through holes at constant feed in 20 mm thick mild steel plates. In test 1, a drill lasted 300 holes at 150 rpm while in test 2, another drill lasted 200 holes at 300 rpm. |
| A. | 25353 |
| B. | 154.54 |
| C. | 253.53 |
| D. | None of the above |
| Answer» D. None of the above | |
| 479. |
Holes of diameter 25 |
| A. | 0.048 mm |
| B. | 0.015 mm |
| C. | 0.005 mm |
| D. | 0.008 mm |
| Answer» C. 0.005 mm | |
| 480. |
A 30 mm hole shaft assembly results in minimum and maximum clearances of 0.03 mm and 0.30 mm respectively. The hole has a unilateral tolerance with zero fundamental deviation. If the tolerance on the shaft is 0.08 mm, the maximum size of the hole is |
| A. | 230.11 |
| B. | 30.16 |
| C. | 30.19 |
| D. | 30.27 |
| Answer» D. 30.27 | |
| 481. |
In an interference microscope, a groove produces a band distortion of 4 band spacing. If the wave length of the monochromatic light source is 0.5 microns, the groove depth is.... mm |
| A. | 0.5 m |
| B. | 1.5 m |
| C. | 1.6 m |
| D. | None of the above |
| Answer» B. 1.5 m | |
| 482. |
The preferred option for holding an odd-shaped workpiece in a centre lathe is |
| A. | live and dead centres |
| B. | three jaw chuck |
| C. | lathe dog |
| D. | four jaw chuck |
| Answer» E. | |
| 483. |
In NC part programming spindle speed of 730 rpm will be coded by the magic -3 rule as |
| A. | S673 |
| B. | S730 |
| C. | S630 |
| D. | S037 |
| Answer» C. S630 | |
| 484. |
In a CAD package, mirror image of a 2D point P(5, 10) is to be obtained about a line which passes through the origin and makes an angle of 45 counterclockwise with the X-axis coordinates of the transformed point will be |
| A. | (7.5,5) |
| B. | (10,5) |
| C. | (7.5,-5) |
| D. | (10,-5) |
| Answer» C. (7.5,-5) | |
| 485. |
Machining of complex shapes on CNC machine requires |
| A. | simultaneous control of x, y and z axes |
| B. | simultaneous control of x and y axes |
| C. | independent control of x and y axes |
| D. | independent control of x, y and z axes |
| Answer» B. simultaneous control of x and y axes | |
| 486. |
In a CAD package, a point P(6,3,2) is projected along a vector V |
| A. | (4, 4, 0) |
| B. | (8, 2, 0) |
| C. | (7, 4, 0) |
| D. | (2, 5, 0) |
| Answer» E. | |
| 487. |
Negative allowance is provided on the pattern to take care of |
| A. | The distortion allowance |
| B. | The draft allowance |
| C. | The machining allowance |
| D. | The shake allowance |
| Answer» E. | |
| 488. |
Typical machining operations are to be performed on hard-to-machine materials by using the processes listed below. Choose the best set of Operation- Process combinations |
| A. | P-1, Q-5, R-3, S-4 |
| B. | P-1, Q-4, R-1, 5-2 |
| C. | P-5, Q-1, R-2, S-6 |
| D. | P-2, Q-3, R-5, S-6 |
| Answer» E. | |
| 489. |
Gray cast iron blocks of size 100 mm 50 mm 10 mm with a central spherical cavity of diameter 4 mm are sand cast. The shrinkage allowance for the pattern is 3%. The ratio of the volume of the pattern to volume of the casting is |
| A. | 0.913 |
| B. | 1 |
| C. | 0.951 |
| D. | 0.915 |
| Answer» B. 1 | |
| 490. |
The following four unconventional machining processes are available in a shop floor. The most appropriate one to drill a hole of square cross section of 6 mm 6 mm and 25 mm deep is |
| A. | Abrasive Jet Machining |
| B. | Plasma Arc Machining |
| C. | Laser Beam Machining |
| D. | Electro Discharge Machining |
| Answer» E. | |
| 491. |
During the electrochemical machining (ECM) of iron (atomic weight = 56, valency = 2) at current of 1000 A with 90% current efficiency, the material removal rate was observed to be 0.26 cc/s. If Titanium (atomic weight = 48, valency = 3) is machined by the ECM process at the current of 2000 A with 90% current efficiency, the expected material removal rate in gm/s will be |
| A. | 0.11 |
| B. | 0.23 |
| C. | 0.30 |
| D. | 0.52 |
| Answer» D. 0.52 | |
| 492. |
An orthogonal cutting operations is being carried out in which uncut thickness is 0.010 mm, cutting speed is 130 m/min, rake angle is 15 and width of cut is 6 mm. It is observed that the chip thickness is 0.015 mm, the cutting force is 60 N and the thrust force is 25 N. The ratio of friction energy to total energy is ______. (correct to two decimal places) |
| A. | 0.4408 |
| B. | 1.44 |
| C. | 0.9938 |
| D. | None of these |
| Answer» B. 1.44 | |
| 493. |
In finish machining of an island on a casting with CNC milling machine, an end mill with 10 mm diameter is employed, The corner points of the Island are represented by (0, 0), (0, 30), (60, 30) and (50, 0). By applying cutter radius compensation, the trajectory of the cutter will be |
| A. | (-5, 0), (-5, 35), (55, 35), (55, -5), (-5, 5) |
| B. | (0, -5), (55, -5). (55, 35), (-5, 35), (-5, -5) |
| C. | (5,5), (5, 25), (45,25),(45, 5), (5, 5) |
| D. | (5, 5), (45, 5), (45, 25), (5, 25), (5, 5) |
| Answer» C. (5,5), (5, 25), (45,25),(45, 5), (5, 5) | |
| 494. |
In a point to point control NC machine, the slides positioned by an integrally mounted stepper motor drive. If the specification of the motor is 1 deg/pulse, and the pitch Of the lead screw is 3.6 mm. |
| A. | 1 micron |
| B. | 10 micron |
| C. | 50 micron |
| D. | 100 micron |
| Answer» C. 50 micron | |
| 495. |
Match the following non-traditional machining processes with the corresponding material removal mechanisms: |
| A. | P-2, Q-3, R-4, S-1 |
| B. | P-2, Q-4, R-3, S-1 |
| C. | P-3, Q-2, R-4, S-1 |
| D. | P-2, Q-3, R-1, S-4 |
| Answer» B. P-2, Q-4, R-3, S-1 | |
| 496. |
Electrochemical machining is performed to remove material from an iron surface of 20 mm 20 mm under the following conditions: |
| A. | 0.3471 |
| B. | 3.471 |
| C. | 34.71 |
| D. | 347.1 |
| Answer» B. 3.471 | |
| 497. |
The primary purpose of sprue in casting mould is to |
| A. | feed the casting at rate consistent with the rate of solidification |
| B. | Act as a reservoir for molten metal |
| C. | feed molten metal from the pouring basin to the gate |
| D. | help feed the casting until all solidification takes place |
| Answer» E. | |
| 498. |
Match the casting defects (Group A) with the probable causes (Group B): |
| A. | P-1, Q-3, R-2, S-4 |
| B. | P-4, Q-3, R-2, S-1 |
| C. | P-3, Q-4, R-2, S-1 |
| D. | P-1, Q-4, R-4, S-3 |
| Answer» C. P-3, Q-4, R-2, S-1 | |
| 499. |
Match the items of List-I (Equipment) with the items of List-II (Process) the correct answer using the given codes. |
| A. | P-2, Q-1, R-4, S-6 |
| B. | P-4, Q-2, R-3, S-5 |
| C. | P-4, Q-5, R-1, S-2 |
| D. | P-3, Q-5, R-2, S-1 |
| Answer» D. P-3, Q-5, R-2, S-1 | |
| 500. |
A sprue in a sand mould has a top diameter of 20 mm and height of 200 mm. The velocity of the molten metal at the entry of the sprue is 0.5 m/s. Assume acceleration due to gravity as 9.8 m/s |
| A. | 2.034 |
| B. | 3.043 |
| C. | 2.043 |
| D. | 2.045 |
| Answer» D. 2.045 | |