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.
| 201. |
10 mm diameter holes are to be punched in a steel sheet of 3 mm thickness. Shear strength of the material is 400 N/mm2 and penetration is 40%. Shear provided on the punch is 2 mm. The blanking force during the operation will be |
| A. | 22.6 kN |
| B. | 37.7 kN |
| C. | 61.6 kN |
| D. | 94.3 kN |
| Answer» B. 37.7 kN | |
| 202. |
In Oxyacetylene gas welding, temperature at the inner cone of the flame is around |
| A. | 3500 C |
| B. | 3200 C |
| C. | 2900 C |
| D. | 2550 C |
| Answer» C. 2900 C | |
| 203. |
Match the following Manufacturing process A. Cold rolling B. Milling C. Brazing D. Powder metallurgy Property 1. Machinability 2. Weldability 3. Ductility 4. Tensile strength 5. Compactability |
| A. | A 3, B 1, C 4, D 5. |
| B. | A 3, B 1, C 4, D 2. |
| C. | A 3, B 1, C 2, D 5. |
| D. | A 2, B 1, C 4, D 5. |
| Answer» B. A 3, B 1, C 4, D 2. | |
| 204. |
Consider the following characteristics: 1. Single machine tool 2. Manual material handling system 3. Computer control 4. Random sequencing of part of machines Which of the above characteristics are associated with flexible manufacturing system? |
| A. | 1,2 and 3 |
| B. | 1 and 2 |
| C. | 3 and 4 |
| D. | 2, 3 and 4 |
| Answer» D. 2, 3 and 4 | |
| 205. |
Match the following Machining Process A. Machining B. Casting C. Welding D. Drawing Associated Problem 1. Wrinkling 2. Heat affected zone 3. Hot tear 4. Built up edge |
| A. | A 4, B 3, C 2, D 1 |
| B. | A 4, B 3, C 1, D 2 |
| C. | A 1, B 3, C 2, D 4 |
| D. | A 4, B 1, C 2, D 3 |
| Answer» B. A 4, B 3, C 1, D 2 | |
| 206. |
Electrochemical grinding removes material by... A... And... B... processes. A. electrochemical/chemical B. mechanical/chemical |
| A. | A. (chemical ) and B. (Mechanical) |
| B. | A. (Electrochemical) and B. (chemical ) |
| C. | A. (Electrochemical) and B. (Mechanical) |
| D. | A. (chemical ) and B. (chemical ) |
| Answer» D. A. (chemical ) and B. (chemical ) | |
| 207. |
Suppose point P1 and APT (Automatically Programmed Tool) programming is coded by statement P1 = POINT/XSMALL, INTOF, LN1, CR1 The coded geometric situation without causing error is |
| A. | |
| B. | |
| C. | |
| Answer» C. | |
| 208. |
A titanium sheet of 5.0 mm thickness is cut by wire cut EDM process using a wire of 1.0 mm diameter. A uniform spark gap of 0.5 mm on both sides of the wire is maintained during cutting operation. If the feed rate of the wire into the sheet is 20 mm/min, the material removal rate (in mm3/min) will be |
| A. | 150 |
| B. | 200 |
| C. | 300 |
| D. | 400 |
| Answer» C. 300 | |
| 209. |
The total angular movement (in degrees) of a lead screw with a pitch of 5.0 mm to drive the work table by a distance of 200 mm in a NC machine is |
| A. | 14400 |
| B. | 28800 |
| C. | 57600 |
| D. | 72000 |
| Answer» B. 28800 | |
| 210. |
Generally, cylindrical parts produced by powder metallurgy should not have non-uniform cross section and length to diameter ratio exceeding. |
| A. | Generally cylindrical parts produced by powder metallurgy should have length to diameter ratio less than or equal to 2.5 |
| B. | Generally cylindrical parts produced by powder metallurgy should have length to diameter ratio less than or equal to 3.5 |
| C. | Generally cylindrical parts produced by powder metallurgy should have length to diameter ratio less than 2.5 |
| D. | None of the above |
| Answer» B. Generally cylindrical parts produced by powder metallurgy should have length to diameter ratio less than or equal to 3.5 | |
| 211. |
A stepper motor has 150 steps. The output shaft of the motor is directly coupled to a lead screw of pitch 4 mm, which drives a table. If the frequency of pulse supply to the motor is 200 Hz, the speed of the table (in mm/min) is |
| A. | 400 |
| B. | 320 |
| C. | 300 |
| D. | 280 |
| Answer» C. 300 | |
| 212. |
Keeping all other parameters unchanged, the tool wear in electrical discharge machining (EDM) would be less if the tool material has |
| A. | High thermal conductivity and high specific heat |
| B. | High thermal conductivity and low specific heat |
| C. | Low thermal conductivity and low specific heat |
| D. | Low thermal conductivity and high specific heat |
| Answer» B. High thermal conductivity and low specific heat | |
| 213. |
Ultrasonic machines used in material removal process, requires ultrasonic transducers. The transducers work on different working principles. One of the working principles of such ultrasonic transducers is based on |
| A. | Eddy current effect |
| B. | Seeback effect |
| C. | Piezoresistive effect |
| D. | Piezoelectric effect |
| Answer» E. | |
| 214. |
While removing material from iron (atomic weight = 56, valency = 2 and density = 7.8 g/cc by electrochemical machining, a metal removal rate of 2 cc/min is desired. The current (in A) required for achieving this material removal rate is |
| A. | 896.07 |
| B. | 14.93 |
| C. | 448.03 |
| D. | 53764.29 |
| Answer» B. 14.93 | |
| 215. |
The process of shot peening increases fatigue life of steel springs mainly because it results in |
| A. | Hardening of surface |
| B. | Increased stiffness of material |
| C. | Compressive residual stresses |
| D. | Microstructural changes in material |
| Answer» D. Microstructural changes in material | |
| 216. |
In powder manufacturing process of manufacturing maximum temperature is associated with |
| A. | Briquetting |
| B. | Sintering |
| C. | Pre-sintering |
| D. | Blending |
| Answer» C. Pre-sintering | |
| 217. |
3-2-1 method of location in jig or fixture would collectively restrict the workpiece in 'n' degree of freedom, where the value of 'n' is |
| A. | 6 |
| B. | 8 |
| C. | 9 |
| D. | 12 |
| Answer» D. 12 | |
| 218. |
The use of fixture reduces |
| A. | Only operation time |
| B. | Tooling cost |
| C. | Only setting time |
| D. | Both setting time and operation |
| Answer» D. Both setting time and operation | |
| 219. |
Fixtures are used in batch production for |
| A. | Clamping the job |
| B. | Supporting the clamping the job |
| C. | Supporting and clamping the job and guiding the tool |
| D. | Supporting, locating and clamping the job |
| Answer» E. | |
| 220. |
Consider the following characteristics: |
| A. | 1,2 and 3 |
| B. | 1 and 2 |
| C. | 3 and 4 |
| D. | 2, 3 and 4 |
| Answer» D. 2, 3 and 4 | |
| 221. |
FAPT is part programming language. (T/F) |
| A. | True |
| B. | False |
| C. | NA |
| D. | NA |
| Answer» B. False | |
| 222. |
The total true strain applied and the final length (in mm), respectively are |
| A. | 2.45 and 817 |
| B. | 2.45 and 345 |
| C. | 3.02 and 2043 |
| D. | 3.02 and 33 |
| Answer» D. 3.02 and 33 | |
| 223. |
Using direct extrusion process, a round billet of 100 mm length and 50 mm diameter is extruded. Considering an ideal deformation process (no friction and no redundant work) extrusion ratio 4 and average flow stress of material 300 MPa, the pressure (MPa) on the ram will be |
| A. | 416 |
| B. | 624 |
| C. | 700 |
| D. | 832 |
| Answer» B. 624 | |
| 224. |
The function of draw bead in the deep drawing operation is to |
| A. | produce a balance between the amount of stretching and drawing |
| B. | produce a circular groove on the flange |
| C. | reduce the drawing load |
| D. | reduce the wrinkles on the flange |
| Answer» E. | |
| 225. |
In a bending operation, if the modulus of elasticity E is increased keeping all other parameters unehanged, the spring back will |
| A. | increase |
| B. | decrease |
| C. | remains unchanged |
| D. | be independent of E |
| Answer» C. remains unchanged | |
| 226. |
Wall thickness of drawn cup is controlled by |
| A. | Deep drawing |
| B. | Reverse drawing |
| C. | Redrawing |
| D. | Ironing |
| Answer» E. | |
| 227. |
Neglecting friction and redundant work, the force (in KN) required for drawing the bar though the first die, is |
| A. | 15.71 |
| B. | 10.21 |
| C. | 6.77 |
| D. | 4.39 |
| Answer» E. | |
| 228. |
Which one of the following is not a synthetic abrasive material? |
| A. | Silicon carbide |
| B. | Aluminum oxide |
| C. | Titanium nitride |
| D. | Cubic boron nitride |
| Answer» D. Cubic boron nitride | |
| 229. |
The teeth of both external and internal spur gears can be cut of |
| A. | milling machine |
| B. | gear shaping machine |
| C. | gear hogging machine |
| D. | gear shaving machine |
| Answer» C. gear hogging machine | |
| 230. |
Continuous rails for Indian railways are welded by ______ welding process. |
| A. | Casting Process |
| B. | Welding Process |
| C. | Both A and B |
| D. | None of the above |
| Answer» B. Welding Process | |
| 231. |
FMS is well suited to mass scale manufacturing. (T/F) |
| A. | False |
| B. | True |
| C. | NA |
| D. | NA |
| Answer» B. True | |
| 232. |
With increasing Joint thickness, the tensile strength of a brazed Joint |
| A. | Continuously decreases |
| B. | First decreases and then increases |
| C. | Continuously increases |
| D. | First increases and then decreases |
| Answer» E. | |
| 233. |
High speed electron beam welding is focused on the weld spot using |
| A. | vacuum lens |
| B. | inert gas lens |
| C. | optical lens |
| D. | magnetic lens |
| Answer» E. | |
| 234. |
Welding application process |
| A. | A - 3, B - 4, C - 2, D - 5 |
| B. | A - 5, B - 4, C - 2, D - 3 |
| C. | A - 3, B - 2, C - 4, D - 5 |
| D. | A - 4, B - 3, C - 2, D - 5 |
| Answer» B. A - 5, B - 4, C - 2, D - 3 | |
| 235. |
Machining time for one single pass (in seconds) is |
| A. | 60 |
| B. | 66 |
| C. | 126 |
| D. | 150 |
| Answer» C. 126 | |
| 236. |
Mean up-deformed chip thickness (in microns) is |
| A. | 142 |
| B. | 100 |
| C. | 71 |
| D. | 50 |
| Answer» D. 50 | |
| 237. |
In whitworth quick return mechanism (used in shapers) the velocity of the ram is maximum at |
| A. | middle of the forward stroke |
| B. | beginning of return stroke |
| C. | end of return stroke |
| D. | middle of the return stroke |
| Answer» E. | |
| 238. |
Which pair amount the following solid state welding processes uses heat from an external source |
| A. | P and R |
| B. | R and S |
| C. | Q and S |
| D. | P and S |
| Answer» E. | |
| 239. |
Assertion (A): In electron beam welding process, vacuum is an essential process parameter. 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 | |
| 240. |
Assertion (A): A sound welded joint should not only be strong enough but should also exhibits a good amount of ductility. 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 | |
| 241. |
The cold cracking susceptibility of the heat affected zone in an arc weld is influenced by |
| A. | P and S |
| B. | P, Q and S |
| C. | P, Q and R |
| D. | R and S |
| Answer» D. R and S | |
| 242. |
A straight edge is inspected on a coordinate measuring machine. The readings obtained at intervals of 100 mm along the top edge are 100.1, 100.5 and 100.4 mm. The straightness error, making the end points as reference is... |
| A. | 0.25mm |
| B. | 0.39mm |
| C. | 0.19mm |
| D. | 0.35mm |
| Answer» B. 0.39mm | |
| 243. |
Reamer is designed to have even number of flutes to |
| A. | Balance the cutting forces |
| B. | Conform to shop floor standard |
| C. | Enable measurement of the reamer diameter |
| D. | Help in regrinding of reamer |
| Answer» B. Conform to shop floor standard | |
| 244. |
In turning operation the surface finish can be improved by decreasing |
| A. | cutting speed |
| B. | feed per revolution |
| C. | rake angle |
| D. | Nose radius |
| Answer» C. rake angle | |
| 245. |
Abrasives are not used in |
| A. | Buffering process |
| B. | Burnishing process |
| C. | Polishing process |
| D. | Super finishing process |
| Answer» C. Polishing process | |
| 246. |
The purpose of helical grooves in a twist drill is to |
| A. | 1 and 2 |
| B. | 2 and 3 |
| C. | 3 and 4 |
| D. | 1 and 4 |
| Answer» D. 1 and 4 | |
| 247. |
The flanks of teeth of rack-type gear cutter used for cutting involute gear profiles are |
| A. | Cycloidal |
| B. | Circular |
| C. | Involute |
| D. | Straight |
| Answer» D. Straight | |
| 248. |
Machinability of steels is improved by the addition of |
| A. | Sulphur |
| B. | Silicon |
| C. | Phosphorous |
| D. | All of the above |
| E. | A and C both |
| Answer» F. | |
| 249. |
The quick return mechanism used in shaper has rocker arm drive of length 200 mm. If the crank radius is 50 mm and the offset between crank centre and rocket arm pivot is 20 mm, length of the stroke (in meters) is |
| A. | 0.5 |
| B. | 1.0 |
| C. | 1.5 |
| D. | 2.0 |
| Answer» C. 1.5 | |
| 250. |
Reamers have usually even number of teeth so that the cutting forces on teeth are properly balanced. (T/F) |
| A. | True |
| B. | False |
| C. | NA |
| D. | NA |
| Answer» B. False | |