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. |
Tubes of multiple effect evaporator used for concentration of sugar cane juice are made of? |
| A. | Nickel |
| B. | Copper |
| C. | Stainless steel |
| D. | Brass |
| Answer» C. Stainless steel | |
| 2. |
Steel tower used for the storage of oleum? |
| A. | Is lined with lead |
| B. | Need not be lined |
| C. | Is lined with rubber |
| D. | Is lined with acid-proof bricks |
| Answer» C. Is lined with rubber | |
| 3. |
Super conductors are those substances, which? |
| A. | Offer no resistance to current flow |
| B. | Conduct electricity at low temperature |
| C. | Offer high resistance to current flow |
| D. | Conduct electricity at high temperature |
| Answer» B. Conduct electricity at low temperature | |
| 4. |
Evaporator used for concentrating tomato juice is made of? |
| A. | Nickel |
| B. | Brass |
| C. | Stainless steel-glass lined |
| D. | Cast iron-rubber lined |
| Answer» D. Cast iron-rubber lined | |
| 5. |
High degree of toughness is a must for? |
| A. | High speed steel |
| B. | Shock resisting steel |
| C. | Cold work tool steel |
| D. | None of these |
| Answer» C. Cold work tool steel | |
| 6. |
In the Contact process of sulphuric acid manufacture, 98% acid cooler is made of? |
| A. | Stainless steel |
| B. | Cast iron |
| C. | Lead lined steel |
| D. | Rubber lined steel |
| Answer» C. Lead lined steel | |
| 7. |
Silicon percentage in iron castings to have maximum hardness should be about? |
| A. | 0.3 |
| B. | 0.5 |
| C. | 0.8 |
| D. | 2.5 |
| Answer» D. 2.5 | |
| 8. |
A metallic alloy in general as compared to their pure metal components is? |
| A. | More corrosion resistant |
| B. | Having higher melting point |
| C. | Having lower hardness, reactivity and fusibility |
| D. | Having lower electrical conductivity |
| Answer» B. Having higher melting point | |
| 9. |
Vycor, a widely used material for making 'thermal wells' in temperature measurement, is a? |
| A. | Cermet |
| B. | Glass |
| C. | Thermosetting plastic |
| D. | Metallic alloy |
| Answer» C. Thermosetting plastic | |
| 10. |
'Semi steel' is? |
| A. | Produced by adding 10-20% steel to the cupola charge |
| B. | Stronger than cast iron |
| C. | Both A & B |
| D. | Neither A nor B |
| Answer» D. Neither A nor B | |
| 11. |
Presence of manganese in alloy steel improves its? |
| A. | Corrosion resistance |
| B. | Cutting ability |
| C. | Abrasion resistance & toughness |
| D. | Elasticity & creep resistance |
| Answer» D. Elasticity & creep resistance | |
| 12. |
The ability of a material to absorb energy in the elastic range is a measure of its? |
| A. | Toughness |
| B. | Resilience |
| C. | Malleability |
| D. | Brittleness |
| Answer» C. Malleability | |
| 13. |
Which of the following commercial metals is most abundantly found in India?? |
| A. | Copper |
| B. | Aluminium |
| C. | Nickel |
| D. | Zinc |
| Answer» C. Nickel | |
| 14. |
Hardening of steel is not possible unless it is heated __________ critical point.? |
| A. | Above the highest |
| B. | Above the lowest |
| C. | Between the first & second |
| D. | Between the second & third |
| Answer» C. Between the first & second | |
| 15. |
Which of the following is not an alloy of copper and tin?? |
| A. | Bell metal |
| B. | Gun metal |
| C. | Admiralty gun metal |
| D. | Monel metal |
| Answer» E. | |
| 16. |
Presence of silicon in steel? |
| A. | Is in the form of free Si |
| B. | Indicates that steel is not deoxidised properly |
| C. | Decreases the blow holes formation tendency in castings |
| D. | None of these |
| Answer» D. None of these | |
| 17. |
Invar used in thermocouples is an alloy of nickel and? |
| A. | Iron |
| B. | Copper |
| C. | Chromium |
| D. | Lead |
| Answer» B. Copper | |
| 18. |
The carbonating tower used in Solvay process of soda ash manufacture is made of? |
| A. | Cast iron |
| B. | Stainless steel |
| C. | Karbate |
| D. | Lead lined steel |
| Answer» B. Stainless steel | |
| 19. |
Dip stick used for measuring the level of petro fuels (e.g. petrol, diesel, fuel oil etc.) in the storage tank is usually made of? |
| A. | Brass |
| B. | Copper |
| C. | High carbon steel |
| D. | Aluminium |
| Answer» B. Copper | |
| 20. |
Anodic material used for the cathodic protection of underground buried steel pipeline is? |
| A. | Nickel or copper |
| B. | Zinc or magnesium |
| C. | Bronze |
| D. | Brass |
| Answer» C. Bronze | |
| 21. |
Material of construction of pipe generally used for conveying water in India is? |
| A. | Stainless steel |
| B. | Cast iron |
| C. | Wrought iron |
| D. | Lead lined steel |
| Answer» C. Wrought iron | |
| 22. |
The metals occuring at the lower most position in the electromotive series? |
| A. | Do not resist corrosion |
| B. | Resist corrosion very strongly |
| C. | Are very brittle |
| D. | Are heat insulators |
| Answer» C. Are very brittle | |
| 23. |
Cementite is? |
| A. | Fe‚ÇÉC chemically |
| B. | A compound of carbon and iron |
| C. | Characterised by an orthorhombic crystal structure |
| D. | All of the above |
| Answer» E. | |
| 24. |
In drop forging process, the forging is done by dropping the __________ at high velocity.? |
| A. | Hammer |
| B. | Workpiece |
| C. | Die with hammer |
| D. | Weight on hammer |
| Answer» D. Weight on hammer | |
| 25. |
Specify the material of construction suitable for handling concentrated HNO₃ at 100°C.? |
| A. | High silicon iron, Kel-F and teflon |
| B. | Tin and wood |
| C. | Silicone rubber |
| D. | Stainless steel |
| Answer» B. Tin and wood | |
| 26. |
Nickel is a constituent of? |
| A. | Bronze |
| B. | Solder |
| C. | Duralumin |
| D. | Monel metal |
| Answer» E. | |
| 27. |
Maximum permissible sulphur content in steel is __________ percent.? |
| A. | 0.015 |
| B. | 0.055 |
| C. | 0.505 |
| D. | 0.805 |
| Answer» C. 0.505 | |
| 28. |
Which of the following finds the least commercial use?? |
| A. | Pure iron |
| B. | High silicon iron |
| C. | Low carbon steel |
| D. | High carbon steel |
| Answer» B. High silicon iron | |
| 29. |
Bog iron used for the adsorption of H?S from coke oven gas is? |
| A. | An intimate mixture of saw dust and iron dust (i.e. moist ferric hydroxide) |
| B. | Iron impregnated with resin (usually bakelite) |
| C. | Carbon free iron |
| D. | None of these |
| Answer» B. Iron impregnated with resin (usually bakelite) | |
| 30. |
Metalloid is? |
| A. | Highly electronegative in nature |
| B. | An element which exhibits the properties of both metal & non-metal |
| C. | An alloy |
| D. | All of the above |
| Answer» C. An alloy | |
| 31. |
Lead pipe is? |
| A. | Especially resistant to solutions containing H‚ÇÇSO‚ÇÑ |
| B. | Usually joined by burning (e.g. by melting to adjacent pieces with a torch) |
| C. | Having very low elastic limit resulting in permanent deformation from either mechanical or thermal strain |
| D. | All of the above |
| Answer» E. | |
| 32. |
High carbon steel contains more than __________ percent carbon.? |
| A. | 0.5 |
| B. | 2.2 |
| C. | 2.5 |
| D. | 2.8 |
| Answer» B. 2.2 | |
| 33. |
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» D. All of the above | |
| 34. |
The largest consumption of zinc for alloys is in the making of? |
| A. | Bearing metal |
| B. | Brasses |
| C. | Brazing solder |
| D. | Die casting alloys |
| Answer» C. Brazing solder | |
| 35. |
Age hardening is concerned with? |
| A. | Copper |
| B. | Brass |
| C. | Duralumin |
| D. | Silver |
| Answer» D. Silver | |
| 36. |
Glass is corroded by? |
| A. | Fluorine (dry or wet) |
| B. | Sulphuric acid |
| C. | Phosphoric acid |
| D. | None of these |
| Answer» B. Sulphuric acid | |
| 37. |
Which of the following alloy steels is the most suitable for making gun barrels and projectiles?? |
| A. | Tungsten steel |
| B. | Molybdenum steel |
| C. | Nickel-chrome steel |
| D. | Cobalt steel |
| Answer» D. Cobalt steel | |
| 38. |
Presence of cobalt in steel improves its? |
| A. | Cutting ability |
| B. | Corrosion resistance |
| C. | Tensile strength |
| D. | None of these |
| Answer» B. Corrosion resistance | |
| 39. |
Softening of hardned steel is done by its? |
| A. | Normalising |
| B. | Tempering |
| C. | Annealing |
| D. | Carburising |
| Answer» C. Annealing | |
| 40. |
Which one has the maximum tensile strength out of the following? |
| A. | Nodular cast iron |
| B. | Pig iron |
| C. | White cast iron |
| D. | Grey cast iron |
| Answer» B. Pig iron | |
| 41. |
Which of the following has the highest density and the lowest melting point? |
| A. | Stainless steel |
| B. | Titanium |
| C. | Lead |
| D. | Aluminium |
| Answer» D. Aluminium | |
| 42. |
SO‚ÇÉ is absorbed using H‚ÇÇSO‚ÇÑ in a$ |
| A. | Cast iron packed tower |
| B. | Stainless steel plate tower |
| C. | Packed steel tower lined with acid proof bricks |
| D. | None of these |
| Answer» D. None of these | |
| 43. |
Which of the following is a light alloy? |
| A. | Monel metal |
| B. | Dow metal |
| C. | German silver |
| D. | Babbit metal |
| Answer» C. German silver | |
| 44. |
Copper is dissolved from its ore by H‚ÇÇSO‚ÇÑ in a percolation tank made of$ |
| A. | Wood |
| B. | Stainless steel |
| C. | Reinforced concrete lined with lead |
| D. | High silicon iron (14% Si) |
| Answer» D. High silicon iron (14% Si) | |
| 45. |
Which of the following is the hardest material? |
| A. | Topaz |
| B. | Quartz |
| C. | Corrundum |
| D. | Flourite |
| Answer» D. Flourite | |
| 46. |
Approximate value of the modulus of elasticity for steel is about __________ x l0⁶kg/cm².$ |
| A. | 0.5 |
| B. | 2 |
| C. | 40 |
| D. | 75 |
| Answer» C. 40 | |
| 47. |
Which of the following is produced by condensation polymerisation? |
| A. | Bakelite |
| B. | Polythene |
| C. | Poly vinyl chloride |
| D. | Polystyrene |
| Answer» B. Polythene | |
| 48. |
Which of the following alloy steels has the energy saving properties making it suitable for use in electrical machines? |
| A. | Silicon steel |
| B. | Chromium steel |
| C. | Molybdenum steel |
| D. | None of these |
| Answer» B. Chromium steel | |
| 49. |
Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (l/20th of ordinary metals)? |
| A. | Invar |
| B. | Constantan |
| C. | Chromel |
| D. | Alumel |
| Answer» B. Constantan | |
| 50. |
Which of the following comprises of hydrocarbons? |
| A. | Mica flakes |
| B. | Glass |
| C. | Rubber |
| D. | None of these |
| Answer» D. None of these | |