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.
| 601. |
Match List-I (Cutting tool materials) with ListII (Manufacturing methods) and select the correct answer using the codes given below : |
| A. | A - 3 , B - 1 , C - 5 , D - 2 |
| B. | A - 2 , B - 5 , C - 4 , D - 3 |
| C. | A - 3 , B - 5 , C - 4 , D - 2 |
| D. | A - 2 , B - 1 , C - 5 , D - 3 |
| Answer» E. | |
| 602. |
The primary function of a riser is to |
| A. | feed molten metal to casting as it solidifies |
| B. | prevent atmospheric air from contaminating the metal in the mould |
| C. | allow gases to easily escape from mould cavity |
| D. | allow molten metal to rise above the mould cavity |
| Answer» D. allow molten metal to rise above the mould cavity | |
| 603. |
The heat generated in metal cutting is dissipated in different proportions into environment, tool, chip and workpiece. The correct order of this proportion in decreasing magnitude is (no cutting fluid is used) |
| A. | tool, work, chip, environment |
| B. | work, tool, chip, environment |
| C. | tool, chip, environment, work |
| D. | chip, tool, work, environment |
| Answer» E. | |
| 604. |
The main cutting force acting on a tool during the turning (orthogonal cutting) operation of a metal is 400 N. The turning was performed using 2 mm depth of cut and 0.1 mm/rev feed rate. The specific cutting pressure (in N/mm |
| A. | 1000 |
| B. | 2000 |
| C. | 3000 |
| D. | 4000 |
| Answer» C. 3000 | |
| 605. |
BUE formation.... A... the cutting force and... B.. the surface finish |
| A. | decreases/increases |
| B. | spoils/improves |
| C. | increases |
| D. | spoils |
| Answer» B. spoils/improves | |
| 606. |
Match List-I with List-II and select the correct answer using the codes given below : |
| A. | A - 1 , B - 4 , C - 2 , D - 5 |
| B. | A - 4 , B - 1 , C - 3 , D - 2 |
| C. | A - 4 , B - 1 , C - 2 , D - 3 |
| D. | A - 1 , B - 4 , C - 3 , D - 5 |
| Answer» D. A - 1 , B - 4 , C - 3 , D - 5 | |
| 607. |
Consider the following statements: During the third stage of tool wear, rapid deterioration of tool edge takes place because |
| A. | 1 and 3 |
| B. | 2 and 4 |
| C. | 1 and 4 |
| D. | 2 and 3 |
| Answer» C. 1 and 4 | |
| 608. |
In USM the metal removal rate would... with increasing mean grain diameter of the abrasive material |
| A. | increase |
| B. | decrease |
| C. | increase and then decrease |
| D. | decrease and then increase |
| Answer» E. | |
| 609. |
In ECM, the material removal rate will be higher for metal with |
| A. | large density |
| B. | larger valency |
| C. | larger Chemical absorption tendency |
| D. | large chemical weight |
| Answer» E. | |
| 610. |
ECM... (can/cannot) be used for all such materials for which ultrasonic machining is possible, while EDM... (can/cannot) be used for all such materials for which ECM is possible. |
| A. | cannot |
| B. | can / can |
| C. | cannot / can |
| D. | cannot / cannot |
| Answer» D. cannot / cannot | |
| 611. |
USM is about the best process for making holes in glass which are comparable in size with thickness of the sheet. |
| A. | False |
| B. | True |
| C. | Neither True nor True |
| D. | A and B |
| Answer» C. Neither True nor True | |
| 612. |
EDM is more efficient process than ECM for producing large non-circular holes |
| A. | False |
| B. | True |
| C. | True / False |
| D. | None of these |
| Answer» B. True | |
| 613. |
EDM imposes larger forces on tool than ECM |
| A. | True |
| B. | True / False |
| C. | False |
| D. | None of these |
| Answer» D. None of these | |
| 614. |
Neglecting the contribution of the feed force towards cutting power, the specific cutting energy in J/mm |
| A. | 0.2 |
| B. | 2 |
| C. | 200 |
| D. | 2000 |
| Answer» C. 200 | |
| 615. |
Two cutting tools are being compared for a machining operation. The tool life equations are |
| A. | 15.0 |
| B. | 39.4 |
| C. | 49.3 |
| D. | 60.0 |
| Answer» C. 49.3 | |
| 616. |
Assuming approach and over-travel of the cutting tool to be zero, the machining time in min is |
| A. | 2.93 |
| B. | 5.86 |
| C. | 6.66 |
| D. | 13.33 |
| Answer» B. 5.86 | |
| 617. |
A steel bar 200 mm in a diameter is turned at a feed of 0.25 mm/rev. with a depth of cut of 4 mm. The rotational speed of the workpiece is 160 rpm. The material removal rate in mm |
| A. | 160 |
| B. | 167.6 |
| C. | 1600 |
| D. | 1675.5 |
| Answer» E. | |
| 618. |
Match the following materials with their most appropriate application. |
| A. | P - 1 , Q - 3 , R - 2 , S - 4 |
| B. | P - 1 , Q - 4 , R - 2 , S - 3 |
| C. | P - 3 , Q - 2 , R - 4 , S - 1 |
| D. | P - 3 , Q - 4 , R - 2 , S - 1 |
| Answer» E. | |
| 619. |
Two shafts A and B have their diameters specified as 100 0.1 mm and 0.1 0.0001 mm respectively. Which of the following statements is/are true |
| A. | Tolerance in the dimension is greater in shaft A |
| B. | The relative error in the dimension is greater in shaft A |
| C. | Tolerance in the dimension is greater in shaft B |
| D. | The relative error in the dimension is same for shaft A and shaft B |
| Answer» B. The relative error in the dimension is greater in shaft A | |
| 620. |
A bush was turned after mounting the same on a mandrel. The mandrel diameter in millimeters is 40 |
| A. | 0.01 |
| B. | 0.055 |
| C. | 0.1 |
| D. | 0.11 |
| Answer» C. 0.1 | |
| 621. |
A triangular face in a CAD model has vertices: P1(0, 0, 0); P2(1, 1, 0) and P3(1,1, 1).The area of the facet is |
| A. | 0.500 |
| B. | 0.707 |
| C. | 1.414 |
| D. | 1.732 |
| Answer» C. 1.414 | |
| 622. |
A robot arm PQ with end coordinates P(0,0) and Q(2,5) rotates counter clockwise about P in the XY plane by 90 . The new coordinate pair of the end point Q is |
| A. | ( 2,5) |
| B. | ( 5,2) |
| C. | ( .5,-2) |
| D. | (2, 5) |
| Answer» C. ( .5,-2) | |
| 623. |
For generating a Coon's surface we require |
| A. | a set of grid points on the surface |
| B. | a set of grid control points |
| C. | four bounding-curves defining the surface |
| D. | two bounding curves and a set of grid control points |
| Answer» D. two bounding curves and a set of grid control points | |
| 624. |
Given that the notations of robot joints are Llinear, O-orthogonal, R-rotation, T-twisting, and V- revolving, the anatomy of a polar configuration robot is described by the alphabetical string |
| A. | TOO |
| B. | TLL |
| C. | TRL |
| D. | TVO |
| Answer» D. TVO | |
| 625. |
The component development and manufacturing activities when assisted by a computer area: computer aided graphics (CAG), CAD, CAM, CAPP and computer aided quality control (CAQC). The most appropriate sequence of these activities is |
| A. | CAD-CAG-CAPP-CAM-CAQC |
| B. | CAG-CAD-CAM-CAPP-CAQC |
| C. | CAD-CAG-CAPP-CAQC-CAM |
| D. | CAD-CAPP-CAG-CAM-CAQC |
| Answer» B. CAG-CAD-CAM-CAPP-CAQC | |
| 626. |
In a machining operation chip thickness ratio is 0.3 and the back rake angle of the tool is 10 . What is the value of the shear strain? |
| A. | 0.31 |
| B. | 0.13 |
| C. | 3.00 |
| D. | 3.34 |
| Answer» E. | |
| 627. |
The optimum pouring time for a casting depends on several factors. One important factor among them is |
| A. | location of riser |
| B. | porosity of sand mould |
| C. | fluidity of casting metal |
| D. | area of the pouring basin |
| Answer» C. fluidity of casting metal | |
| 628. |
In ECM the MRR is due to |
| A. | Corrosion |
| B. | Erosion |
| C. | Fusion |
| D. | Ion displacement |
| Answer» E. | |
| 629. |
Deep hole drilling of small diameter, say 0.2 mm is done with EDM by selecting the tool material as |
| A. | Copper wire |
| B. | Tungsten wire |
| C. | Brass wire |
| D. | Tungsten carbide |
| Answer» C. Brass wire | |
| 630. |
In ultrasonic machining the tool ..... at very high frequency with the help of ...... transducers. |
| A. | Vibrate, magnetostrictive. |
| B. | Vibrate |
| C. | magnetostrictive |
| D. | None of these |
| Answer» B. Vibrate | |
| 631. |
Complete the manual part program for drilling a hole located at point (20, 20) from the target point. The depth of the hole to be drilled is 15 mm FROM/TARG GOTO/20, 20, 0 |
| A. | GODLTA/0, 0,-15 GODLTA/0, 0, 15 GOTO/SETPT |
| B. | GODLTA/0, 0, 15 GODLTA/0, 0, -15 GOTO/SETPT |
| C. | GOTO/SETPT GODLTA/0, 0, -15 GODLTA/0, 0, 15 |
| D. | GOTO/SETPT GODLTA/0, 0, 15 GODLTA/0, 0, -15 |
| Answer» B. GODLTA/0, 0, 15 GODLTA/0, 0, -15 GOTO/SETPT | |
| 632. |
In ultrasonic machining process, the material removal rate will be higher for material with |
| A. | higher toughness |
| B. | higher ductility |
| C. | lower toughness |
| D. | higher fracture strain |
| Answer» D. higher fracture strain | |
| 633. |
The two main criteria for selecting the electrolyte in ECM is that the electrolyte should |
| A. | chemically stable |
| B. | not allow dissolution of cathode material |
| C. | not allow dissolution of anode material |
| D. | have high electrical conductivity |
| E. | Option B and Option D |
| Answer» F. | |
| 634. |
In EDM, the tool is made of |
| A. | Copper |
| B. | HSS |
| C. | Cast iron |
| D. | Plain carbon |
| Answer» B. HSS | |
| 635. |
Inter electrode gap in ECG is controlled by |
| A. | controlling the pressure of electrolyte flow |
| B. | controlling the applied static load |
| C. | controlling the size of diamond particle in the wheel |
| D. | controlling the texture of the work |
| Answer» D. controlling the texture of the work | |
| 636. |
Selection of electrolyte for ECM is as follows |
| A. | non-passivating electrolyte for stock removal and passivating electrolyte for finish control |
| B. | passivating electrolyte for stock removal and non-passivating electrolyte for finish control |
| C. | selection of electrolyte is dependent on current density |
| D. | electrolyte selection is based on tool work electrodes |
| Answer» C. selection of electrolyte is dependent on current density | |
| 637. |
In an engineering drawing one finds the designation of 20G7f8, the position of tolerance of the hole is indicated by |
| A. | Letter G |
| B. | Letter f |
| C. | Number 7 |
| D. | Number 8 |
| Answer» B. Letter f | |
| 638. |
The hole 40 |
| A. | clearance fit |
| B. | interference fit |
| C. | transition fit |
| D. | drive fit |
| Answer» D. drive fit | |
| 639. |
The fit on a hole-shaft pair system is specified as H7-h6, the type of fit is |
| A. | Clearance fit |
| B. | Running fit (Sliding fit) |
| C. | Push fit (transition fit) |
| D. | Force fit (Interference fit) |
| Answer» B. Running fit (Sliding fit) | |
| 640. |
Checking the diameter of a hole using GO and NOGO gauges in an example of inspection by |
| A. | Variable and attributes |
| B. | attributes |
| C. | Variable |
| D. | None of these |
| Answer» C. Variable | |
| 641. |
GO and NO-GO plug gauges are to be designed for a hole 20.000 |
| A. | 20.010 mm and 20.050 mm |
| B. | 20.014 mm and 20.046 mm |
| C. | 20.006 mm and 20.054 mm |
| D. | 20.014 mm and 20.054 mm |
| Answer» E. | |
| 642. |
In a 2 D CAD package, clockwise circular arc of radius 5, specified from P |
| A. | (10, 10) |
| B. | (15, 10) |
| C. | (15, 15) |
| D. | (10, 15) |
| Answer» D. (10, 15) | |
| 643. |
A shaft has a dimension, 35 |
| A. | 0.025, 0.008 |
| B. | 0.025, 0.016 |
| C. | 0.009, 0.008 |
| D. | 0.009, 0.016 |
| Answer» E. | |
| 644. |
Use of robot for spray painting is primarily justified for improved.... A.... and reduced... B... |
| A. | (A) productivity , (B) consistency |
| B. | (A) consistency , (B) hazard |
| C. | (A) productivity , (B) cost |
| D. | None of these |
| Answer» C. (A) productivity , (B) cost | |
| 645. |
The iron carbon diagram and the TTT curves are determined under |
| A. | Equilibrium and non-equilibrium conditions respectively |
| B. | Non-equilibrium and equilibrium conditions respectively |
| C. | Equilibrium conditions for both |
| D. | Non-equilibrium conditions for both |
| Answer» B. Non-equilibrium and equilibrium conditions respectively | |
| 646. |
The part of a gating system which regulates the rate of pouring of molten metal is |
| A. | pouring basin |
| B. | runner |
| C. | choke |
| D. | ingate |
| Answer» B. runner | |
| 647. |
The dimensions of a cylindrical side riser (height = diameter) for a 25 cm 15 cm 5 cm steel casting are to be determined. For the tabulated shape factor values given below, diameter of the riser (in cm) is_______. |
| A. | 11.60 cm |
| B. | 10.66cm |
| C. | 10.60cm |
| D. | None of the above |
| Answer» D. None of the above | |
| 648. |
Ratio of solidification time of a cylindrical casting (height = radius) of that of a cubic casting of side two times the height of cylindrical casting is_______. |
| A. | 2 : 3 |
| B. | 3 : 4 |
| C. | 1 : 2 |
| D. | None of these |
| Answer» E. | |
| 649. |
A cube and a sphere made of cast iron (each of volume 1000 cm ) were cast under identical conditions. The time taken for solidifying the cube was 4 s. The solidification time (in s) for the for the sphere is ________. |
| A. | 6.157 sec |
| B. | 6.154 sec |
| C. | 5.157 sec |
| D. | None of these |
| Answer» B. 6.154 sec | |
| 650. |
The solidification time of a casting is proportional to (V/A) where V is the volume of the casting and A is the total casting surface area losing heat. Two cubes of same material and size are cast using sand casting process. The top face of one of the cubes is completely insulated. The ratio of the solidification time for the cube with top face insulated to that of the other cube is |
| A. | <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>25</center></td></tr><tr><td style="text-align: center;">36</td></tr></table> |
| B. | <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>36</center></td></tr><tr><td style="text-align: center;">25</td></tr></table> |
| C. | 1 |
| D. | <table><tr><td style="border-bottom:1px solid #000000;vertical-align:bottom;padding-bottom:2px;"><center>6</center></td></tr><tr><td style="text-align: center;">5</td></tr></table> |
| Answer» C. 1 | |