MCQOPTIONS
Saved Bookmarks
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. |
The yield point in fatigue loading compared to that in static loading is less. The ratio of ultimate tensile strength to endurance limit of a material subjected to fatigue loading is? |
| A. | 0.5 |
| B. | 1 |
| C. | 1.5 |
| D. | 2 |
| Answer» E. | |
| 2. |
Gross national product (GNP) means the total value of __________ in a country.? |
| A. | Goods produced |
| B. | Gold reserve |
| C. | Earning of the citizens |
| D. | Taxes paid |
| Answer» B. Gold reserve | |
| 3. |
Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode? |
| A. | Occurs higher in the electro-chemical series of metals |
| B. | Is exemplified by magnesium plate |
| C. | Is much cheaper than the cathodic base material to be guarded against corrosion |
| D. | All of the above |
| Answer» E. | |
| 4. |
__________ is the hardest oxide and is hence used where high wear resistance at high temperature is required.? |
| A. | Beryllia |
| B. | Zirconia |
| C. | Alumina |
| D. | Magnesia |
| Answer» D. Magnesia | |
| 5. |
Swaging is a/an __________ operation.? |
| A. | Piercing |
| B. | Forging |
| C. | Extrusion |
| D. | Drawing |
| Answer» C. Extrusion | |
| 6. |
A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material?? |
| A. | Steel |
| B. | Glass |
| C. | Rubber |
| D. | Brass |
| Answer» B. Glass | |
| 7. |
Hydrogen in liquid steels is dissolved? |
| A. | As tiny gas bubbles |
| B. | In the atomic form |
| C. | In the ionic form |
| D. | In the molecular form |
| Answer» B. In the atomic form | |
| 8. |
Milk is fat dispersed in water. It is an example of? |
| A. | Suspension |
| B. | Emulsion |
| C. | Gel |
| D. | Solution |
| Answer» C. Gel | |
| 9. |
Creep consideration is the most important in case of the? |
| A. | Blades of gas turbines |
| B. | Steam engine flywheel |
| C. | Cast iron pipes |
| D. | Cycle chains |
| Answer» B. Steam engine flywheel | |
| 10. |
A suitable lubricant used for watches is? |
| A. | Metallic soap solution |
| B. | Grease |
| C. | Palm oil |
| D. | Hazel-nut oil |
| Answer» E. | |
| 11. |
Which of the following materials has the maximum shrinkage allowance ?? |
| A. | Brass |
| B. | Cast iron |
| C. | Lead |
| D. | Aluminium alloy |
| Answer» D. Aluminium alloy | |
| 12. |
In an isochoric process,? |
| A. | There is no transfer of mass and energy |
| B. | Free expansion of an ideal gas occurs |
| C. | No mechanical work is done by the system |
| D. | All of the above |
| Answer» D. All of the above | |
| 13. |
__________ furnace is generally used in the non-ferrous foundaries.? |
| A. | Direct arc |
| B. | Indirect arc |
| C. | Resistance |
| D. | Induction |
| Answer» C. Resistance | |
| 14. |
A material expanding freely due to heating will develop __________ stress.? |
| A. | No |
| B. | Compressive |
| C. | Tensile |
| D. | Thermal |
| Answer» B. Compressive | |
| 15. |
The material used for coating the welding electrode is termed as the? |
| A. | Flux |
| B. | Slag |
| C. | Protective layer |
| D. | Binder |
| Answer» C. Protective layer | |
| 16. |
Out of the following, the __________ pipe has the least corrosion resistance.? |
| A. | Mild steel |
| B. | Copper |
| C. | Cast iron |
| D. | Wrought iron |
| Answer» E. | |
| 17. |
In continuous casting of liquid steel, the mould is made of? |
| A. | Water cooled steel |
| B. | Water cooled copper |
| C. | Refractory oxide |
| D. | Silicon carbide |
| Answer» C. Refractory oxide | |
| 18. |
Pick out the correct statement.? |
| A. | Materials exhibiting high elasticity obey Hooke's law |
| B. | The elastic behaviour of rubber under compression is the same as its behaviour under tension |
| C. | The damping capacity of a material is due to its plastic deformation |
| D. | The stress required to cause plastic flow in polycrystalline material is higher as compared to monocrystalline materials due to the presence of grains of different orientations |
| Answer» C. The damping capacity of a material is due to its plastic deformation | |
| 19. |
The refrigerant freon-12 is chemically? |
| A. | CCl‚ÇÇF‚ÇÇ |
| B. | CCl‚ÇÉF |
| C. | CClF‚ÇÉ |
| D. | CCl‚ÇÑF |
| Answer» B. CCl‚Äö√á√âF | |
| 20. |
Maximum heat dissipation occurs from a steel wire (k = 0.5 W/m. k) of 15 mm diameter exposed to air (h = 20W/m² .k), when the insulation thickness is __________ mm.$ |
| A. | 15 |
| B. | 25 |
| C. | 10 |
| D. | 30 |
| Answer» C. 10 | |
| 21. |
Which of the following performance characteristics of a S.I engine is not affected by the front end volatility of the petrol used? |
| A. | Vapour locking |
| B. | Hot starting |
| C. | Spark plug fouling |
| D. | All of the above |
| Answer» D. All of the above | |
| 22. |
The efficiency of a Carnot heat engine operating between absolute temperatures T‚ÇÅ and T‚ÇÇ (when, T‚ÇÅ > T‚ÇÇ) is given by (T‚ÇÅ - T‚ÇÇ)/T‚ÇÅ. The co-efficient of performance (CO.P.) of a Carnot heat pump operating between T‚ÇÅ and T‚ÇÇ is given by$ |
| A. | T‚ÇÅ/(T‚ÇÅ-T‚ÇÇ) |
| B. | T‚ÇÇ/(T‚ÇÅ-T‚ÇÇ) |
| C. | T‚ÇÅ/T‚ÇÇ |
| D. | T‚ÇÇ/T‚ÇÅ |
| Answer» C. T‚Äö√á√Ö/T‚Äö√á√á | |
| 23. |
Cold cracking in the heat affected zone of a high strength steel weld can take place because of the |
| A. | Retained austenite |
| B. | Martensite formation |
| C. | Relatively high sulphur content in the base metal |
| D. | Sufficient hydrogen present in the welding arc |
| Answer» C. Relatively high sulphur content in the base metal | |
| 24. |
While the oxy-acetylene flame produces a temperature of 3200°C, the temperature produced by oxy-hydrogen flame is about __________ °C.$ |
| A. | 1800 |
| B. | 2000 |
| C. | 2400 |
| D. | 3000 |
| Answer» C. 2400 | |
| 25. |
Between 230 and 370°C, blue brittleness is caused in mild steel because of the$ |
| A. | Immobility of dislocation |
| B. | Strain-ageing |
| C. | Increase in Young's modulus |
| D. | Strain hardening |
| Answer» C. Increase in Young's modulus | |
| 26. |
Which of the following is the most suitable abrasive for grinding high tensile strength materials? |
| A. | Silicon carbide |
| B. | Corundum |
| C. | Aluminium oxide |
| D. | Boron carbide |
| Answer» D. Boron carbide | |
| 27. |
For infinite parallel planes having emis-sivities ε₁ & ε₂, the interchange factor for radiation from surface 1 to surface 2 is given by$ |
| A. | (ε₁ + ε₂)/ε₁.ε₂ |
| B. | Ε₁.ε₂/(ε₁ + ε₂ - ε₁.ε₂) |
| C. | Ε₁.ε₂ |
| D. | Ε₁ + ε₂ |
| Answer» C. ≈í√Ø‚Äö√á√Ö.≈í¬µ‚Äö√á√á | |
| 28. |
Out of the following substances, one ton of __________ will store the maximum heat for a rise of 30°C in temperature.$ |
| A. | Steel |
| B. | Lignite |
| C. | Water |
| D. | Lime stone |
| Answer» D. Lime stone | |
| 29. |
On an average __________ fast neutrons are produced by nuclear fission of each atom of uranium⁻²35.$ |
| A. | 1 |
| B. | 2.5 |
| C. | 3.5 |
| D. | 5 |
| Answer» C. 3.5 | |
| 30. |
Which of the following is categorised as the plastic welding? |
| A. | Gas welding |
| B. | Electric arc welding |
| C. | Forge welding |
| D. | None of these |
| Answer» D. None of these | |
| 31. |
Work done by a/an __________ process is determined by ‚à ´p.dV.$ |
| A. | Adiabatic |
| B. | Quasi-static |
| C. | Isothermal |
| D. | Isentropic |
| Answer» C. Isothermal | |
| 32. |
Which of the following is not a natural abrasive? |
| A. | Silicon carbide |
| B. | Quartz |
| C. | Corundum |
| D. | Emery |
| Answer» B. Quartz | |
| 33. |
Which of the following is not a ferromagnetic material? |
| A. | Nickel |
| B. | Cobalt |
| C. | Aluminium |
| D. | Iron |
| Answer» D. Iron | |
| 34. |
Which of the following is not a suitable solid lubricant? |
| A. | Talc |
| B. | Molybdenum disulphide |
| C. | Graphite |
| D. | None of these |
| Answer» E. | |
| 35. |
Which of the following has the highest value of refractive index? |
| A. | Brine (sea water) |
| B. | Diamond |
| C. | Distilled water |
| D. | Glass |
| Answer» C. Distilled water | |
| 36. |
In spite of large heat transfer co-efficients in boiling liquids, fins are used advantageously, where the entire surface is exposed to __________ boiling. |
| A. | Film |
| B. | Nucleate |
| C. | Transition |
| D. | All of the above |
| Answer» E. | |
| 37. |
Which of the following is an undesirable property of slag produced during the pyrometallurgical method of metal extraction from its ore? |
| A. | High fusibility & fluidity |
| B. | High thermal conductivity |
| C. | Low density |
| D. | High chemical activity |
| Answer» C. Low density | |
| 38. |
The transition temperature at which all the ferromagnetic materials become paramagnetic materials is termed as the 'Curie temperature'. Its value for cobalt is __________ °C.$ |
| A. | 768 |
| B. | 1127 |
| C. | 1359 |
| D. | 1480 |
| Answer» C. 1359 | |
| 39. |
Titanium is produced by __________ of Ti Cl‚ÇÑ.$ |
| A. | Electrolytic reduction |
| B. | Calcium reduction |
| C. | Magnesium reduction |
| D. | Thermal dissociation |
| Answer» D. Thermal dissociation | |
| 40. |
Boiling temperature of carbon dioxide at atmospheric pressure is __________ °C.$ |
| A. | -30.5 |
| B. | -78.5 |
| C. | -183.5 |
| D. | -10.5 |
| Answer» C. -183.5 | |
| 41. |
Which of the following relationships is correct for relating the three elastic constants of an isotropic elastic material (where, E = Young's modulus, G = Modulus of rigidity or shear modulus v = Poisson's ratio)? |
| A. | E = 2G (1 + v) |
| B. | E = G (1 + v) |
| C. | E = G (1 + v)/2 |
| D. | E = 2G (1 + 2v) |
| Answer» B. E = G (1 + v) | |
| 42. |
Regeneration of molecular seive requires it to be heated to a temperature of about __________ °C.$ |
| A. | 80-120 |
| B. | 200-300 |
| C. | 600-800 |
| D. | 1000-1100 |
| Answer» E. | |
| 43. |
__________ of grey cast iron produces white cast iron. |
| A. | Tempering |
| B. | Rapid heating |
| C. | Rapid cooling |
| D. | Slow cooling |
| Answer» C. Rapid cooling | |
| 44. |
Hot dipping process is used for coating a low melting point metal (e.g. Pb, Sn, Zn) on iron, steel & copper having relatively higher melting points. Which of the following is not a hot dipping process? |
| A. | Galvanising |
| B. | Tinning |
| C. | Sheardising |
| D. | None of these |
| Answer» D. None of these | |
| 45. |
Which of the following is an ore dressing operation? |
| A. | Classification |
| B. | Smelting |
| C. | Roasting |
| D. | None of these |
| Answer» B. Smelting | |
| 46. |
Which of the following is not an ore of iron? |
| A. | Chalcopyrite |
| B. | Magnetite |
| C. | Hemetite |
| D. | Limonite |
| Answer» B. Magnetite | |
| 47. |
Basicity [%Cao + %MgO/% SiO‚ÇÇ) of the slag in Indian blast furnace is in the range of$ |
| A. | 0.7-1.0 |
| B. | 1.1-1.4 |
| C. | 1.5 - 1.8 |
| D. | 2.0 - 2.5 |
| Answer» C. 1.5 - 1.8 | |
| 48. |
Eutectic reaction for iron-carbon system occurs at a temperature of __________ °C.# |
| A. | 723 |
| B. | 959 |
| C. | 1147 |
| D. | 1493 |
| Answer» B. 959 | |
| 49. |
Which of the following is a synthetic abrasive ? |
| A. | Corundum |
| B. | Emery |
| C. | Pumice |
| D. | Silicon carbide |
| Answer» E. | |
| 50. |
In a forced draft cooling tower, water is cooled from 95 to 80°F by exposure to air with a wet bulb temperature of 70°F. In this case, the# |
| A. | Range is 15°F |
| B. | Approach is 10°F |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |