MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Reduction in the grain size reduces the __________ of the material.$? |
| A. | Fatigue resistance |
| B. | Tensile strength |
| C. | Creep resistance |
| D. | All of the above |
| Answer» E. | |
| 2. |
Thermal equivalent of electrical power in practical calculation is __________ kcal/kWh.$? |
| A. | 746 |
| B. | 3000 |
| C. | 1000 |
| D. | 550 |
| Answer» C. 1000 | |
| 3. |
Preheating prior to welding is done for the purpose of$? |
| A. | Decreasing cooling rate |
| B. | Facilitating fusion of high melting metals |
| C. | Preventing hot cracking |
| D. | Ensuring full penetration |
| Answer» B. Facilitating fusion of high melting metals | |
| 4. |
Metal cutting by oxy-acetylene flame is accomplished by the __________ of the metal.$? |
| A. | Burning |
| B. | Intensive oxidation |
| C. | Evaporation |
| D. | None of these |
| Answer» C. Evaporation | |
| 5. |
Springs are not made of$? |
| A. | Phospher bronze |
| B. | Nickel steel |
| C. | Monel |
| D. | Carbon steel (c ≤ 0.5%) |
| Answer» E. | |
| 6. |
Boiling point of water gets lowered at high altitudes (e.g., hills), because$? |
| A. | Temperature is low |
| B. | Atmospheric pressure is low |
| C. | Atmospheric pressure is high |
| D. | None of these |
| Answer» C. Atmospheric pressure is high | |
| 7. |
Silicon percentage in the silicon steel used for electrical appliances/equipments is$? |
| A. | 0.3-0.4 |
| B. | 12-14 |
| C. | 3-4 |
| D. | 20-25 |
| Answer» D. 20-25 | |
| 8. |
Dephosphorisation of molten pig iron is favoured by$? |
| A. | Oxidising and basic slag |
| B. | Reducing and basic slag |
| C. | High activity co-efficient of phosphorous in metal |
| D. | Oxidising and neutral slag |
| Answer» C. High activity co-efficient of phosphorous in metal | |
| 9. |
The moment of inertia of a body comes into play in __________ motion.$? |
| A. | Curvilinear |
| B. | Linear |
| C. | Rotational |
| D. | None of these |
| Answer» D. None of these | |
| 10. |
Internal cracks in drawn bars are due to$? |
| A. | Secondary tensile stresses |
| B. | Temperature gradient in the work piece |
| C. | Heated dies and grips |
| D. | Internal compressive residual stress |
| Answer» B. Temperature gradient in the work piece | |
| 11. |
Hot extrusion of aluminium is done in the temperature range of __________ °C.$? |
| A. | 550-600 |
| B. | 450-500 |
| C. | 350-400 |
| D. | 250-300 |
| Answer» D. 250-300 | |
| 12. |
In case of fluid moving machineries, the relationship between saturation temperature and pressure decides the process of$? |
| A. | Water hammer |
| B. | Cavitation |
| C. | Flow separation |
| D. | Turbulent mixing |
| Answer» C. Flow separation | |
| 13. |
More than 1000 tons refrigeration capacity plants are usually of __________ type.$? |
| A. | Vapour compression |
| B. | Vapour absorption |
| C. | Air refrigeration |
| D. | None of these |
| Answer» C. Air refrigeration | |
| 14. |
Unbreakable crockeries are made from __________ polymers.$? |
| A. | Polystyrene |
| B. | Melamine |
| C. | Polystyrene |
| D. | Polyurathane |
| Answer» E. | |
| 15. |
Normalising of an object does not$? |
| A. | Refine coarse grain structure obtained during hot working |
| B. | Improve ductility |
| C. | Improve yield strength |
| D. | Improve machanical properties |
| Answer» C. Improve yield strength | |
| 16. |
Normal dosage of chlorine in public water supply scheme ranges from __________ ppm.$? |
| A. | 0.5 to 1 |
| B. | 10 to 15 |
| C. | 300 to 500 |
| D. | 1000 to 1500 |
| Answer» B. 10 to 15 | |
| 17. |
Which of the following polymers is obtained by copolymerisation of three monomers?$? |
| A. | SAN |
| B. | ABS |
| C. | SBR |
| D. | PTFE |
| Answer» C. SBR | |
| 18. |
In chemical dehumidification process$? |
| A. | Wet bulb temperature increases |
| B. | Dry bulb temperature remains constant |
| C. | Dew point temperature increases |
| D. | Dry bulb temperature increases |
| Answer» C. Dew point temperature increases | |
| 19. |
The Al2 O‚ÇÉ content of cryolite in Hall-Heroult's cell is maintained between __________ percent.? |
| A. | 2-5 |
| B. | 18-20 |
| C. | 12-15 |
| D. | 6-12 |
| Answer» B. 18-20 | |
| 20. |
Temperature of hot gases flowing in a pipe is measured by a thermocouple inserted in the thermal well. The thermal well made of __________ will facilitate the most accurate measurement of the temperature.? |
| A. | Copper |
| B. | Steel |
| C. | Aluminium |
| D. | Brass |
| Answer» B. Steel | |
| 21. |
Which of the following relatively employs the highest heat transfer surface area in a high pressure boiler ?? |
| A. | Airpreheater |
| B. | Economiser |
| C. | Steam superheater |
| D. | Furnace water wall |
| Answer» B. Economiser | |
| 22. |
Strain hardening effect in a metal subjected to cold working is due to the __________ mechanism.? |
| A. | Fracture |
| B. | Dislocation |
| C. | Slip |
| D. | Twinning |
| Answer» D. Twinning | |
| 23. |
Fibre reinforced plastic (FRP) are? |
| A. | Made of glass fibre and thermoplastic resins |
| B. | Anisotropic |
| C. | Made of thermosetting resin and glass fibre |
| D. | Both B and C |
| Answer» E. | |
| 24. |
Maraging steels derive their strength from the following mechanism:? |
| A. | A fine, highly dislocated and strong martensite |
| B. | Fine dispersions of intermetallics of Fe, Ni, Ti etc |
| C. | Fine dispersions of alloy carbides in a ferrite matrix |
| D. | Fine dispersions of Fe‚ÇÉ C nucleated on dislocations in austenite |
| Answer» B. Fine dispersions of intermetallics of Fe, Ni, Ti etc | |
| 25. |
Volume of blast furnace slag is about __________ times the volume of hot metal (pig iron) of the same weight? |
| A. | 1.5 |
| B. | 3 |
| C. | 5 |
| D. | 7 |
| Answer» C. 5 | |
| 26. |
The amount of water evaporated in kg per kg of fuel burnt in a boiler is called the __________ of a boiler.? |
| A. | Evaporative capacity |
| B. | Evaporation efficiency |
| C. | Thermal efficiency |
| D. | Steam load |
| Answer» B. Evaporation efficiency | |
| 27. |
In condensers used in thermal power plants, steam is normally used in shell side and cooling water on the tube side, because of the reason that? |
| A. | Compared to the mass flow rate of cooling water, the rate of condensation of steam is invariably smaller |
| B. | Maintaining vacuum on tube side is more difficult than that on the shell side |
| C. | Water velocity can be increased conveniently to increase the overall heat transfer co-efficient because of its lower specific volume compared to steam |
| D. | Condenser can act as a storage unit for condensed steam |
| Answer» D. Condenser can act as a storage unit for condensed steam | |
| 28. |
Encyclopaedia of Chemical Technology has been? |
| A. | Authored by Kirk Othmer |
| B. | Edited by Perry and Chilton |
| C. | Edited by Kirk Othmer |
| D. | Authored by Perry and Chilton |
| Answer» D. Authored by Perry and Chilton | |
| 29. |
The process of removal of scale formed during hot rolling of steel is termed as? |
| A. | Descaling |
| B. | Shot blasting |
| C. | Pickling |
| D. | Skimming |
| Answer» D. Skimming | |
| 30. |
Natural water contains approximately __________ percent of heavy water.? |
| A. | 0.015 |
| B. | 0.71 |
| C. | 1.2 |
| D. | 3.5 |
| Answer» B. 0.71 | |
| 31. |
Production of a hollow product by inflation of a tube or parison is called the __________ process.? |
| A. | Blow moulding |
| B. | Calendering |
| C. | Extrusion |
| D. | Injection |
| Answer» B. Calendering | |
| 32. |
Machinability of hard alloys and tool steels is improved by? |
| A. | Spherodising |
| B. | Annealing |
| C. | Tempering |
| D. | Normalising |
| Answer» C. Tempering | |
| 33. |
The swift cup test evaluates the following property of a sheet metal.? |
| A. | Stretchability |
| B. | Drawability |
| C. | Bendability |
| D. | None of these |
| Answer» C. Bendability | |
| 34. |
Which of the following pairs is not correctly matched?? |
| A. | Uranium - 233 : Fertile material |
| B. | Bindingenergy : Mass defect |
| C. | Scattering : Absorption cross-section |
| D. | Number of nucleons : Mass number |
| Answer» B. Bindingenergy : Mass defect | |
| 35. |
An example of unsteady non uniform flow is the flow of liquid under pressure through a? |
| A. | Tapering pipe at constant flow rate |
| B. | Tapering pipe at either decreasing or increasing flow rate |
| C. | Long pipeline of constant diameter |
| D. | None of these |
| Answer» C. Long pipeline of constant diameter | |
| 36. |
Though tin occurs lower than iron in the electrochemical series, yet it is coated on steel for corrosion protection, because of its? |
| A. | Lower cost |
| B. | Abundant availability |
| C. | Resistance to vegetable acids as the tin plate are commercially used in 'canning' industry |
| D. | None of these |
| Answer» D. None of these | |
| 37. |
The condition of diffraction from a crystal is given by? |
| A. | nλ = 2d Sin θ |
| B. | λ = d Sin 2θ |
| C. | λ = 2d Sin 2θ |
| D. | nλ = d Sin θ |
| Answer» B. ≈í¬™ = d Sin 2≈í‚àè | |
| 38. |
Circular cross section machine parts which are symmetrical about the axis of rotation are made by hot? |
| A. | Piercing |
| B. | Spinning |
| C. | Drawing |
| D. | Extrusion |
| Answer» C. Drawing | |
| 39. |
Maximum consumption of limestone is in the __________ industry.? |
| A. | Iron and steel |
| B. | Cement |
| C. | Glass |
| D. | Fertiliser |
| Answer» E. | |
| 40. |
Unbreakable crockeries are made from __________ polymers.? |
| A. | Polystyrene |
| B. | Melamine |
| C. | Polystyrene |
| D. | Polyurathane |
| Answer» E. | |
| 41. |
Normal dosage of chlorine in public water supply scheme ranges from __________ ppm.? |
| A. | 0.5 to 1 |
| B. | 10 to 15 |
| C. | 300 to 500 |
| D. | 1000 to 1500 |
| Answer» B. 10 to 15 | |
| 42. |
Normalising of an object does not? |
| A. | Refine coarse grain structure obtained during hot working |
| B. | Improve ductility |
| C. | Improve yield strength |
| D. | Improve machanical properties |
| Answer» C. Improve yield strength | |
| 43. |
In chemical dehumidification process? |
| A. | Wet bulb temperature increases |
| B. | Dry bulb temperature remains constant |
| C. | Dew point temperature increases |
| D. | Dry bulb temperature increases |
| Answer» C. Dew point temperature increases | |
| 44. |
Which of the following polymers is obtained by copolymerisation of three monomers?? |
| A. | SAN |
| B. | ABS |
| C. | SBR |
| D. | PTFE |
| Answer» C. SBR | |
| 45. |
The most suitable material for die casting is? |
| A. | Iron |
| B. | Copper |
| C. | Steel |
| D. | Nickel |
| Answer» C. Steel | |
| 46. |
In which of the following reactions, application of vacuum will help ?? |
| A. | Number of gas molecules in the product side is more than that on the reactant side |
| B. | Number of gas molecules in the reactant side is more than that on the product side |
| C. | Number of gas molecules are the same on both the reactant & the product side |
| D. | None of the above |
| Answer» E. | |
| 47. |
Acetylene should never be conveyed through __________ pipe, as it forms an unstable compound that dissociates violently at the slightest shock.? |
| A. | Stainless steel |
| B. | Copper |
| C. | Aluminium |
| D. | Brass |
| Answer» C. Aluminium | |
| 48. |
Semi-conductors normally employ __________ bonding.? |
| A. | Co-ordinate |
| B. | Ionic |
| C. | Covalant |
| D. | Metallic |
| Answer» D. Metallic | |
| 49. |
Maximum hardenability of steel depends upon its? |
| A. | Chemical composition |
| B. | Carbon content |
| C. | Grain size |
| D. | Alloying elements content |
| Answer» E. | |
| 50. |
Lubricants can be used to? |
| A. | Transmit power hydraulically |
| B. | Form a seal in compressors |
| C. | Remove contaminants by flushing and to insulate transformers, switchgears etc |
| D. | All of the above |
| Answer» E. | |