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. |
Aluminium storage vessel can be used to store |
| A. | aqua regia |
| B. | ferrous sulphate |
| C. | hydrochloric acid (10%) |
| D. | none of these |
| Answer» E. | |
| 2. |
Wrought iron is having very high |
| A. | hardness. |
| B. | strength. |
| C. | corrosion resistance. |
| D. | susceptibility to changes in its properties by heat treatment. |
| Answer» D. susceptibility to changes in its properties by heat treatment. | |
| 3. |
Addition of __________ in steel is helpful in increasing the depth of hardness. |
| A. | chromium |
| B. | sulphur |
| C. | vanadium |
| D. | tungsten |
| Answer» B. sulphur | |
| 4. |
Invar contains the highest percentage of |
| A. | vanadium |
| B. | iron |
| C. | tungsten |
| D. | cobalt |
| Answer» C. tungsten | |
| 5. |
An alloy of iron containing 4% carbon is called |
| A. | high carbon steel |
| B. | wrought iron |
| C. | mild steel |
| D. | none of these |
| Answer» E. | |
| 6. |
100% H2SO4 at 30°C can't be stored in a vessel made/lined with$ |
| A. | cast iron and high silicon iron. |
| B. | mild steel and stainless steel. |
| C. | aluminium, tin and rubber. |
| D. | teflon, glass and porcelain. |
| Answer» D. teflon, glass and porcelain. | |
| 7. |
Brine (15% concentration) can be stored in a vessel made of |
| A. | monel |
| B. | karbate |
| C. | cast iron |
| D. | none of these |
| Answer» B. karbate | |
| 8. |
The ability of a material to offer resistance to scratching or indentation is a measure of its |
| A. | brittleness |
| B. | toughness |
| C. | hardness |
| D. | resilience |
| Answer» D. resilience | |
| 9. |
In the Kraft process of sulphate paper pulp manufacture, the black liquor and the white liquor storage tank is made of |
| A. | concrete |
| B. | wood |
| C. | steel |
| D. | porcelain |
| Answer» D. porcelain | |
| 10. |
SO3 is absorbed using H2SO4 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. | |
| 11. |
Centrifugal pump made of pyrex or glass can't be used to pump |
| A. | milk and fruit juices. |
| B. | alkaline solutions. |
| C. | dilute H2SO4 at room temperature. |
| D. | brine. |
| Answer» C. dilute H2SO4 at room temperature. | |
| 12. |
Which of the following is produced by addition polymerisation ? |
| A. | Polybutadiene |
| B. | Phenol formaldehyde |
| C. | Urea-formaldehyde |
| D. | Dacron |
| Answer» B. Phenol formaldehyde | |
| 13. |
Iron alloyed with carbon upto 2% is called |
| A. | pig iron |
| B. | wrought iron |
| C. | high carbon steel |
| D. | none of these |
| Answer» E. | |
| 14. |
Spark plugs, ignition tubes and electrodes are made of nickel __________ alloys. |
| A. | beryllium |
| B. | manganese |
| C. | copper |
| D. | iron |
| Answer» C. copper | |
| 15. |
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 | |
| 16. |
Perspex is nothing but |
| A. | acrylic sheet |
| B. | an elastomer |
| C. | an alloy of lead and tin |
| D. | aluminium foil clad with bakelite |
| Answer» B. an elastomer | |
| 17. |
Lead is |
| A. | not resistant to corrosion. |
| B. | used as a cathodic material. |
| C. | not used as pigment (in its compound forms) for paints. |
| D. | used as a shock absorber (in mattress form) between the foundation and steel framework of skyscrapper buildings. |
| Answer» E. | |
| 18. |
Which of the following contains maximum percentage of carbon ? |
| A. | Boiler plate steel |
| B. | Rail steel |
| C. | Saws for cutting steel |
| D. | Railway spring steel |
| Answer» D. Railway spring steel | |
| 19. |
Gunmetal and bronze are not corroded by the action of |
| A. | wet chlorine. |
| B. | synthetic detergent solution. |
| C. | hydrochloric acid (10%). |
| D. | nitric acid (< 25%). |
| Answer» C. hydrochloric acid (10%). | |
| 20. |
Maximum consumption of zinc is in |
| A. | alloying |
| B. | galvanising |
| C. | utensil manufacture |
| D. | electrical industry |
| Answer» C. utensil manufacture | |
| 21. |
Polymorphism is not exhibited by |
| A. | carbon |
| B. | iron |
| C. | phosphorous |
| D. | none of these |
| Answer» E. | |
| 22. |
Ability of a material to absorb energy in deformation in the plastic range is characterised as its |
| A. | ductility |
| B. | toughness |
| C. | creep |
| D. | resilience |
| Answer» C. creep | |
| 23. |
Dies for wire drawing are generally made of |
| A. | mild steel |
| B. | stainless steel |
| C. | carbides |
| D. | high carbon steel |
| Answer» D. high carbon steel | |
| 24. |
Carbon is present in the uncombined (graphitic) form in case of |
| A. | cast iron |
| B. | steel |
| C. | ferroalloy |
| D. | none of these |
| Answer» B. steel | |
| 25. |
Clock pendulums are usually made of __________ steel. |
| A. | high speed |
| B. | stainless |
| C. | heat resisting |
| D. | none of these |
| Answer» E. | |
| 26. |
In SO3 absorber (Contact Process), packing material used is of |
| A. | cast iron |
| B. | chemical stoneware |
| C. | karbate |
| D. | mild steel |
| Answer» C. karbate | |
| 27. |
Chilled iron castings are |
| A. | easily machinable |
| B. | soft on surface |
| C. | highly wear resistant |
| D. | none of these |
| Answer» D. none of these | |
| 28. |
When the steel is subjected to normalising, its __________ decreases. |
| A. | yield point |
| B. | ductility |
| C. | ultimate tensile strength (UTS) |
| D. | none of these |
| Answer» C. ultimate tensile strength (UTS) | |
| 29. |
Corrosion resistance of steel is increased by the addition of |
| A. | phosphorous and tungsten. |
| B. | nickel and chromium. |
| C. | lead and vanadium. |
| D. | molybdenum and tungsten. |
| Answer» C. lead and vanadium. | |
| 30. |
Nickel and copper are the basic constituents of |
| A. | hastelloy |
| B. | monel metal |
| C. | German silver |
| D. | inconel |
| Answer» C. German silver | |
| 31. |
Mercury is transported in metal containers made of |
| A. | aluminium |
| B. | iron |
| C. | lead |
| D. | nickel |
| Answer» C. lead | |
| 32. |
Maximum consumption of copper is in |
| A. | utensil manufacture. |
| B. | electrical industry. |
| C. | industrial equipment manufacture. |
| D. | small scale industries. |
| Answer» C. industrial equipment manufacture. | |
| 33. |
Which of the following is the most prone to atmospheric corrosion ? |
| A. | Silver |
| B. | Iron |
| C. | Tin |
| D. | Copper |
| Answer» C. Tin | |
| 34. |
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 | |
| 35. |
Evaporators used in caustic soda recovery and production plant are made of |
| A. | monel metal |
| B. | gun metal |
| C. | wood metal |
| D. | babbit metal |
| Answer» B. gun metal | |
| 36. |
With increase in carbide/graphite ratio in cast iron, its |
| A. | hardness & brittleness increases. |
| B. | ductility decreases. |
| C. | both (a) and (b). |
| D. | neither (a) nor (b). |
| Answer» D. neither (a) nor (b). | |
| 37. |
A hardness depth of about 3 mm can be achieved by induction hardness in __________ seconds. |
| A. | 5 |
| B. | 100 |
| C. | 250 |
| D. | 500 |
| Answer» B. 100 | |
| 38. |
Hardest material so far found is |
| A. | diamond |
| B. | graphite |
| C. | carborundum |
| D. | pumice stone |
| Answer» B. graphite | |
| 39. |
Mild steel is |
| A. | a low carbon steel (0.05 to 0.3% carbon). |
| B. | highly resistant to corrosion (as much as stainless steel). |
| C. | a high carbon steel (0.5 to 1.5% carbon). |
| D. | very poor in strength & ductility. |
| Answer» B. highly resistant to corrosion (as much as stainless steel). | |
| 40. |
Copper has very low |
| A. | malleability |
| B. | ductility |
| C. | tensile strength |
| D. | thermal & electrical conductivity |
| Answer» D. thermal & electrical conductivity | |
| 41. |
__________ does not contain tin as an alloying material. |
| A. | Brass |
| B. | Pewter |
| C. | Solder |
| D. | Babbit metal |
| Answer» B. Pewter | |
| 42. |
Thermal shield used in high powered nuclear reactor to protect the walls of the reactor from radiation damage is made of |
| A. | concrete |
| B. | steel |
| C. | zircalloy |
| D. | graphite |
| Answer» C. zircalloy | |
| 43. |
__________ steel is widely used for the manufacture of motor car crankshafts. |
| A. | Silicon |
| B. | Nickel |
| C. | Chrome |
| D. | High speed |
| Answer» D. High speed | |
| 44. |
Carbon content in steel is __________ percent. |
| A. | 0.1-2 |
| B. | 43620 |
| C. | 43557 |
| D. | 0.001-0.01 |
| Answer» B. 43620 | |
| 45. |
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 | |
| 46. |
Plate and frame filter press is usually made of |
| A. | mild steel |
| B. | cast iron |
| C. | stainless steel |
| D. | galvanised iron |
| Answer» C. stainless steel | |
| 47. |
Copper is dissolved from its ore by H2SO4 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) | |
| 48. |
__________ moulding process can not be used for thermoplastic plastics. |
| A. | Compression |
| B. | Extrusion |
| C. | Injection |
| D. | None of these |
| Answer» D. None of these | |
| 49. |
Carbon content in plain carbon steel is __________ percent. |
| A. | 0.1 to 0.15 |
| B. | 0.35 to 0.45 |
| C. | 0.65 to 0.80 |
| D. | 0.85 to 1.2 |
| Answer» C. 0.65 to 0.80 | |
| 50. |
Alpha iron is stable __________ °C.$ |
| A. | above 1403 |
| B. | upto 910 |
| C. | above 1800 |
| D. | between 910 & 1403 |
| Answer» C. above 1800 | |