Saved Bookmarks
This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the percentage composition of water in natural sands?(a) 2-4%(b) 5-8%(c) 6-9%(d) 10-13% |
|
Answer» The correct answer is (b) 5-8% The best I can explain: Water is an important agent used in sands, but its composition should be inside the desired range. The percentage composition of water in natural sands is around 5-8% for mixing before making a mould. |
|
| 2. |
Water is pumped from a storage tank through a tube of 3.0 cm inside diameter at the rate of 0.001 m^3 /s. What is the kinetic energy per kg water in the tube?(a) 2.00 J/kg(b) 1.00 J/kg(c) 5.00 J/kg(d) 0.05 J/kg |
|
Answer» The correct option is (b) 1.00 J/kg To explain I would say: Kinetic energy Ek = mv^2, tube dia. D = 3.0 cm, m = 1 kg. Cross-section area of tube A = (frac{1}{4}) πD^2 = (frac{1}{4}) π(3.0/100 m)^2 = 7.0686×10^-4m^2 Average velocity of water v = Q/A = 0.001 m^3 /(7.0686×10^-4m^2) = 1.415 m/s KE per kg = Ek/m = 1/2 v^2 = 1/2 (1.415 m/s)^2 = 1.00 m^2/s^2 = 1.00 J/kg. |
|
| 3. |
Why the air already present inside the corebox is necessary to be evacuated before pressurised air is blown into it?(a) The air has comparatively low pressure hence, distortion occurs(b) Hot tears will occur on the surface(c) It will cause poor sand distribution and poor compaction(d) Nothing will happen as the pressure of incoming air neutralises inside air pressure |
|
Answer» Correct choice is (c) It will cause poor sand distribution and poor compaction For explanation I would say: The air inside the corebox does not get enough time to escape hence sand distribution and compaction is poor. |
|
| 4. |
What is the temperature requirement of sand, for manufacturing?(a) Below 40°C(b) Below 50°C(c) Below 60°C(d) Below 70°C |
|
Answer» Correct answer is (a) Below 40°C For explanation I would say: Among the basic conditions of sand, temperature condition is considered an essential factor. The temperature requirement of sand used for manufacturing should be below 40°C. |
|
| 5. |
The figure below shows which foundry sand grain shape?(a) Round(b) Sub angular(c) Angular(d) Compound |
|
Answer» Correct answer is (a) Round Best explanation: None. |
|
| 6. |
What will happen if the parting line in the corebox is not closed properly?(a) Coresand may blow out of the box to create fins on the cores(b) The cope and drag part clamped will detach and break the core(c) Air inclusion occurs as the atmospheric air involves the solidification of core(d) Nothing will happen, as the parting line has no role in core making |
|
Answer» Correct option is (a) Coresand may blow out of the box to create fins on the cores To explain I would say: Obviously, the sand will overflow out causing unwanted contours called fins, which may increase the cost of machining to remove them and time is consumed. |
|
| 7. |
Which of the following increases the dry strength of the sand?(a) Iron oxides(b) Fuel oils(c) Cereals(d) Dextrin and molasses |
|
Answer» Correct choice is (d) Dextrin and molasses The explanation is: Dextrin and molasses are used for increasing the dry strength of the sand, which add hardness to the mould. |
|
| 8. |
What is the dry tensile strength of core sand mixture for general purpose?(a) 15 kg/cm^2(b) 16 kg/cm^2(c) 17 kg/cm^2(d) 18 kg/cm^2 |
|
Answer» Correct choice is (c) 17 kg/cm^2 For explanation I would say: There are various properties of core sand mixture which widely depend on many factors. The dry tensile strength of core sand mixture for general purpose is 17 kg/cm^2. |
|
| 9. |
To avoid difficulties in making of molds, sand should be cooled below what temperature?(a) 100°F(b) 120°F(c) 140°F(d) 160°F |
|
Answer» Right choice is (a) 100°F To elaborate: In sand preparation, the requirement of temperature for production is less than 40°C. The said sand, being used for manufacturing, should be cooled down below 100°F to avoid later difficulties in making the molds. |
|
| 10. |
What is the dry compression strength of core sand mixture for general purpose?(a) 50 kg/cm^2(b) 60 kg/cm^2(c) 70 kg/cm^2(d) 80 kg/cm^2 |
|
Answer» Correct choice is (c) 70 kg/cm^2 The explanation is: The dry compression strength of core sand mixture for general purpose is 70 kg/cm^2, and the dry tensile strength of the of a core sand mixture is calculated to be 17 kg/cm^2. |
|
| 11. |
Which of the following core cannot be classified by the nature of core material employed?(a) Dry sand core(b) Shell core(c) Sodium silicate core(d) Oil bonded core |
|
Answer» The correct choice is (a) Dry sand core Easy explanation: Dry sand core is a core which comes under state or condition of core, while all other types of cores come under nature of core materials employed. |
|
| 12. |
Which of the following will not be classified under the type of core hardening process employed?(a) Nishiyama process(b) Ram up core(c) Furan no-bake system(d) Cold set process |
|
Answer» The correct option is (b) Ram up core Easiest explanation: Ram up core cannot be classified under the type of core hardening process employed, while the remaining can be classified under it. |
|
| 13. |
Directions : In these questions, relationship between different elements is shown in the statements. These statements are followed by 2 conclusions. Mark answer as option given.Statements: P = N ≥ H, C ≥ M = HConclusions:I. P ≥ CII. N > M1. Only conclusion I is true2. Only conclusion II is true3. Either conclusion I or II is true4. Both conclusion I and II are true5. Neither conclusion I nor II is true |
|
Answer» Correct Answer - Option 5 : Neither conclusion I nor II is true Given Statements : P = N ≥ H, C ≥ M = H On combining : P = N ≥ H = M ≤ C Conclusions : I. P ≥ C → False (as, P = N ≥ H = M ≤ C, thus relationship between P and C cannot be determined). II. N > M → False (as, P = N ≥ H = M ≤ C, thus N is either greater than or equal to M, so exact relationship cannot be determined). Hence, neither conclusion I nor II is true. |
|
| 14. |
Dry sand does not have the strength for what functions?(a) To withstand corrosion forces(b) To withstand pressure of molten metal(c) To be able to retain its shape(d) To be able to retain the hardenability |
|
Answer» The correct choice is (d) To be able to retain the hardenability For explanation I would say: Dry sand has its strength for various purposes like, to withstand a pressure of molten metal, to withstand corrosion forces and to be able to retain its shape. But it does not have it for being able to retain the hardenability. |
|
| 15. |
Which of the following core cannot be classified under the shape and position of the core?(a) Balanced core(b) Ram up core(c) Shell core(d) Horizontal core |
|
Answer» Correct choice is (c) Shell core The explanation is: Among the following, shell core is the core which cannot be classified under shape and position of the core, while the remaining others can be classified under it. |
|
| 16. |
Which force is experienced by cores in the mold?(a) Shear force(b) Magnetic force(c) Buoyant force(d) Electric field force |
|
Answer» Correct answer is (c) Buoyant force Explanation: The force experienced by the cores inside the molds is a buoyant force, which is the upward force exerted by a fluid. This force is available due to poured molten metal. |
|
| 17. |
In the Essay ‘Freedom’, what does the writer say about Marx? a. Marx believed that slavery can only be stopped by law. b.Marx believed that slavery can be stopped by extremity. c. Marx believed that slavery can be stopped by women. d. Marx believed that slavery can be stopped by Capitalism. |
|
Answer» a. Marx believed that slavery can only be stopped by law. |
|
| 18. |
What is the amount of clay needed in green sand?(a) 5% – 10%(b) 5% – 15%(c) 15% – 30%(d) 25% – 40% |
|
Answer» The correct answer is (c) 15% – 30% The best I can explain: In green sand, the amount of clay needed in terms of percentage composition is approximately in between 15% to 30% and the amount of water needed in terms of percentage composition is somewhere around 5%. |
|
| 19. |
Which of the following cores are produced by mixing silica?(a) Green sand cores(b) Dry sand cores(c) Oil bonded cores(d) Resin bonded cores |
|
Answer» Right choice is (c) Oil bonded cores Explanation: Oil bonded cores are produced by adding silica and a small amount of linseed oil, and then polymerized. |
|
| 20. |
At what temperature does the silica sand start expanding thermally?(a) 918°F(b) 843°F(c) 1063°F(d) 1124°F |
|
Answer» The correct choice is (c) 1063°F Easiest explanation: It is one of the disadvantages of silica sand, that it has its thermal expansion temperature at 1063°F. At this temperature, the volume of the sand starts to increase. |
|
| 21. |
Which method is used if the upper surface of casting is required to be smooth?(a) Open sand method molding(b) Bedded-in method molding(c) Turn-over method molding(d) Dry sand molding |
|
Answer» The correct choice is (b) Bedded-in method molding The best explanation: If the requirement of the casting is that, its upper surface should be smooth, bedded in the method should be used. |
|
| 22. |
Which of the following is the simplest sand molding?(a) Open sand method molding(b) Bedded-in method molding(c) Turn-over method molding(d) Dry sand molding |
|
Answer» The correct option is (a) Open sand method molding To elaborate: Among the following, open sand method molding is the easiest and simplest of the three green sand molding methods. |
|
| 23. |
Which of the following is not a characteristic property of any moulding sand?(a) Flowability(b) Hardenability(c) Green strength(d) Dry strength |
|
Answer» The correct choice is (b) Hardenability To explain I would say: Flowability, green strength and dry strength are few of the characteristic properties of moulding sand, but not hardenability. |
|
| 24. |
In bedded-in method, what shape does the upper surface of the casting have?(a) Round(b) Helical(c) Flat(d) Trapezoidal |
|
Answer» Correct option is (c) Flat For explanation I would say: In the bedded-in molding method, the upper surface of the casting, which has to be smoothened, can be any other shape, but not flat. |
|
| 25. |
How old was Ingmar Bergman when he received a film projector? a. five year old b. seven year old c. twelve year old d. ten year old |
|
Answer» d. ten year old |
|
| 26. |
Which of the following is not a clay binder?(a) Limonite(b) Illite(c) Limonite(d) Carsil |
|
Answer» Correct choice is (d) Carsil Best explanation: Carsil is a type of patented binder. Carsil is known to be a product of foseco and is therefore called as foseco-product, while the other three types mentioned above are all different types of clay binders. |
|
| 27. |
Describe Raja’s early days as cave-dweller |
|
Answer» Recalls it with pleasure and shame- days when he was a cub and under his mother’s cub-later became supreme ruler of the jungle |
|
| 28. |
Bergman talks about the various influences in his life including his parents, contemporaries, friends and his religious upbringing. Discuss in detail. |
|
Answer» • The strict middle-class home gave him something to sharpen himself against • They taught him a number of values—efficiency, punctuality, a sense of financial responsibility • Important to the artist-setting oneself severe standards. • Torsten Hammaren ofGothenburg- taught him about theatre • Religious problems are continuously alive. • Never stops concerning himself with them • Does not take place on the emotional level, but on an intellectual one. |
|
| 29. |
Which of the following is a principle binder used in carbon dioxide moulding?(a) Carbon(b) Carbon Dioxide(c) Sodium(d) Sodium silicate |
|
Answer» The correct choice is (d) Sodium silicate The best explanation: Sodium silicate is the principle binder used in carbon dioxide moulding process. The mixture of sodium silicate and sand is treated with carbon dioxide to form a bond. |
|
| 30. |
On increasing the binder content, what in the moulding sand gets reduced?(a) Hardenability(b) Strength(c) Permeability(d) Brittleness |
|
Answer» Right option is (c) Permeability Easiest explanation: On increasing the binder content, the hardenability does not get affected. The strength and the brittleness to do not change, but on addition of too much of binder in the moulding sand, the permeability of the moulding sand gets reduced. |
|
| 31. |
How does the churning of emotions bring about self-realisation in Prakriti even if at the cost of her mother’s life? (Chandalika) |
|
Answer» • Prakriti happy at recognition which she receives with sage’s action – • Error of judgement • Tries to lure the sage with the help of her mother’s spell • Ultimately realises that it is a grave sin – sage’s body no longer is resplendent- Buddha comes to his rescue- • Spell takes a toll on mother and she dies |
|
| 32. |
In cement bonded sand mold, sand mold material consists of what percentage of silica sand?(a) 75.5%(b) 80.5%(c) 85.5%(d) 90.5% |
|
Answer» Correct answer is (c) 85.5% To explain I would say: In a cement bonded sand mold, it is observed that the sand mold material consists of a very high content of silica sand. Cement bonded sand mold contains 85.5% composition of silica sand. |
|
| 33. |
Green sand is heated to what temperature to convert it into dry sand?(a) 150°F – 300°F(b) 200°F – 450°F(c) 250°F – 550°F(d) 300°F – 650°F |
|
Answer» The correct option is (d) 300°F – 650°F To explain I would say: To convert green sand into dry sand, the green sands are heated to a fairly good amount of temperature. This temperature would range in between the ranges of 300°F to 650°F. |
|
| 34. |
In Nobake moulding process, the chemical process of hardening of binder starts when ___________(a) The sand is poured into the mixture(b) The sand is taken out of the mixture(c) The mixture is poured into the moulding flask(d) When the molten metal is poured into the cavity |
|
Answer» The correct choice is (b) The sand is taken out of the mixture The explanation is: A mixture is used to blend the sand with chemical binder. The chemical hardening starts when this sand exits the mixture. |
|
| 35. |
That one wayfarer, mother, the one and only. In him are all who fare along the ways of all the world…. (from Chandalika) Who does the word ‘wayfarer’ refer to? a. Vikrama b. Ratna c. Satyam d. Ananda |
|
Answer» Correct answer is (d) Ananda |
|
| 36. |
Which of the following is the principal material used for Nobake moulding process?(a) Furan or Urethane(b) Wood saw(c) Clay-bentonite(d) Water only |
|
Answer» The correct option is (a) Furan or Urethane The explanation is: Nobake is a moulding process that involves the use of furan (chemical binders) to bond the moulding sand. |
|
| 37. |
Which machine molding process will give uniform strength throughout the mold?(a) Sand slinging(b) Squeezing(c) Jolt and squeezing(d) Jolting |
|
Answer» Right answer is (a) Sand slinging For explanation: In sand slinging, we will obtain uniform strength throughout the mold because localized ramming of sand takes place because of throwing the small-small amount of sand into the mold box at the same amount of force. But in other processes strength will be more at the top or bottom or middle. |
|
| 38. |
A skin dried mold is dried up to what depth?(a) 4mm – 12mm(b) 5mm – 19mm(c) 6mm – 25mm(d) 7mm – 23mm |
|
Answer» Right option is (c) 6mm – 25mm Easy explanation: A skin dried mold, is dried only up to a depth from 6mm to 25mm. These molds are specifically dried only up to this depth, with an intention that, the mold may possess strength. |
|
| 39. |
The Nobake mould have a higher strength as compared to other moulds due to _________(a) Its higher moisture content(b) Its lower moisture content(c) The property to withstand higher metallostatic pressures during casting(d) The property to adapt to any volume |
|
Answer» The correct choice is (c) The property to withstand higher metallostatic pressures during casting The best I can explain: The Nobake moulding process provides a good strength of mould, hence, it can withstand the metallostatic pressures and can give good dimensional tolerances. |
|
| 40. |
The play Chandalika is based on the famous Buddhist legend of Buddha’s disciple named_____ a. Vikrama b. Ratna c. Satyam d. Ananda |
|
Answer» Correct answer is (d) Ananda |
|
| 41. |
The play Chandalika is based on the famous Buddhist legend of Buddha’s disciple named ________ a. Vikrama b. Ratna c. Satyam d. Ananda |
|
Answer» Answer is: d. Ananda |
|
| 42. |
The following figure represents which hand molding equipment?(a) Bellow(b) Sprue pin(c) Spirit level(d) Swab |
|
Answer» The correct choice is (b) Sprue pin The best I can explain: The hand molding equipment here is a sprue pin. A tapering is provided to the pin, that is, the diameter of the pin keeps increasing from one end to another. |
|
| 43. |
The following figure represents which hand molding equipment?(a) Trowel(b) Vent wire(c) Spirit level(d) Swab |
|
Answer» Right option is (a) Trowel For explanation I would say: The hand molding equipment which is shown in the figure is a trowel. It is used for flat finish of the mold surface. These are basically used for cutting ingates. |
|
| 44. |
The following figure represents which hand molding equipment?(a) Gagger(b) Draw spike(c) Peen rammer(d) Swab |
|
Answer» Correct choice is (b) Draw spike The explanation is: The hand molding equipment which is shown in the figure is a draw spike. It is a sharp tapered rod, that is, the diameter of the rod goes on increasing from the tip till the end. |
|
| 45. |
In which of the following molding process strength at top of the mold is less?(a) Hand molding(b) Squeezing(c) Jolting(d) Jolt and Squeezing |
|
Answer» The correct answer is (c) Jolting To explain: During jolting, the sand-filled mold is taken to a certain height so that it possesses potential energy and then allowed to fall freely onto the ground. Due to impact force transmitted to the bottom of the mold is very high when compared to the top of the mold that leads to high strength at the bottom and low strength at top of the mold. |
|
| 46. |
Which of the following molding methods have the highest production rate?(a) Squeezing(b) Jolt and squeezing(c) Jolting(d) Sand slinging |
|
Answer» Right option is (c) Jolting To explain I would say: In jolting, we only need to take the mold to a certain height and then drop it. Thus highest production rate of the is achieved. Sand slinging requires more time as it is a repetitive process. Jolt and squeezing combines both jolting and squeezing hence will take more time than jolting. In squeezing, we need to keep the force for a certain time which reduces the production rate. |
|
| 47. |
“Tell me another!” scoffed Pranjol. “We have an Indian legend too. Bodhidharma, an ancient Buddhist ascetic, cut off his eyelids because he felt sleepy during meditations. Ten tea plants grew out of the eyelids. The leaves of these plants when put in hot water and drunk, banished sleep.” “Tea was first drunk in China,’’ Rajvir added, ‘‘as far back as 2700 B.C.! In fact, words such as tea, chai and chini are from the Chinese. Tea came to Europe only in the sixteenth century and was drunk more as medicine than as beverage.” i. The main idea of this extract is a) Tea as a popular beverage in Europe and how it spread. b) Origin of tea in India and why it became popular in Europe. c) Importance of India in popularising tea and influencing Europe.d) Indian legend on tea and how it travelled from China to Europe. ii. Why do you think Pranjol ‘scoffed’? a) He was upset with the legend Rajvir shared. b) He was mocking Rajvir for his lack of knowledge. c) He was amused and tickled at what Rajvir shared. d) He was impressed with what Rajvir had shared.iii. Pick the option that includes the tea label information that corresponds to the given sentence. “The leaves of these plants when put in hot water and drunk, banished sleep.”a) Option 1 b) Option 2 c) Option 3 d) Option 4iv. Based on the inference from the extract, which of these is NOT TRUE about tea drinking in the sixteenth century Europe? Dr. Smith is a doctor of sixteenth century Europe. a) Dr. Smith encouraged drinking of green tea whenever available, to reduce chances of tooth loss. b) Dr. Smith prescribed regular tea drinking to all his patients with a weak heart. c) Dr. Smith always served tea as refreshment when he has guests, as they all enjoyed this beverage. d) Dr. Smith usually recommended black tea to reduce inflammation in the body.v. Based on this extract, how do you think Rajvir felt while narrating?a)i) excitedii) agitatedb)i) hystericalii) nervousc)i) nervousii) agitatedd)i) enthusiasticii) passionate |
|
Answer» 1. d) Indian legend on tea and how it travelled from China to Europe. 2. c) He was amused and tickled at what Rajvir shared. 3. c) Option 3 4. c) Dr. Smith always serves tea as refreshment when he has guests, as they all enjoy this beverage. 5. d) i) enthusiastic ii) passionate |
|
| 48. |
Which of the following is not an application of Open sand molding method?(a) Grills(b) Floor plates(c) Weights(d) Cupboards |
|
Answer» Right answer is (d) Cupboards For explanation I would say: Among the listed applications of an open sand molding method, making cupboards is not an application of it. |
|
| 49. |
The following figure represents which molding method?(a) Open sand method molding(b) Bedded-in method molding(c) Turn-over method molding(d) Dry sand molding |
|
Answer» The correct choice is (c) Turn-over method molding Best explanation: The following figure represents a turn-over method of molding, where the drag flask is kept over the pattern. |
|
| 50. |
What is the electric flux density in free space if the electric field intensity is 1V/m?(a) 7.76*10^-12C/m^2(b) 8.85*10^-12C /m^2(c) 1.23*10^-12C /m^2(d) 3.43*10^-12C /m^2 |
|
Answer» Right choice is (b) 8.85*10^-12C /m^2 Easy explanation: The formula for electric filed density is: D=epsilon*E = 1*8.85*10^-12 = 8.85*10^-12C /m^2. |
|