MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 400 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which one is remelted and poured into moulds to get cast iron ? |
| A. | Wrought iron |
| B. | Pig iron |
| C. | Low carbon steel |
| D. | Mild steel |
| Answer» C. Low carbon steel | |
| 2. |
White cast iron as compared to grey cast iron is ________________? |
| A. | More durable |
| B. | Very brittle |
| C. | Very hard |
| D. | All A., B. & C. |
| Answer» E. | |
| 3. |
White cast iron is not__________________? |
| A. | Malleable |
| B. | Whitish in color |
| C. | Brittle |
| D. | Strong and hard |
| Answer» B. Whitish in color | |
| 4. |
White metal is an alloy of___________________? |
| A. | Lead, tin and cadmium |
| B. | Copper, tin and zinc |
| C. | Copper and lead |
| D. | None of these |
| Answer» E. | |
| 5. |
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. | |
| 6. |
With increase in the carbon percentage in the steel, its__________________? |
| A. | Hardness increases |
| B. | Ductility reduces |
| C. | Tensile strength increases |
| D. | All A., B. and C. |
| Answer» E. | |
| 7. |
Wood is corroded by__________________? |
| A. | Hydrochloric acid |
| B. | SO2 (dry or wet) |
| C. | Chlorine (dry or wet) |
| D. | All A., B. and C. |
| Answer» E. | |
| 8. |
Wood metal is not used for making___________________? |
| A. | Soft solder |
| B. | Casting for dental work |
| C. | Storage tank for storing brine and caustic soda |
| D. | Fusible safety plug for pressure cooker |
| Answer» D. Fusible safety plug for pressure cooker | |
| 9. |
Work hardening of a material ________________? |
| A. | Decreases its tensile strength |
| B. | Decreases its ductility |
| C. | Increases its ductility |
| D. | Does not affect its ductility |
| Answer» C. Increases its ductility | |
| 10. |
Wrought iron is a suitable material of construction for handling _____________ solutions? |
| A. | Dilute acidic |
| B. | Concentrated acidic |
| C. | Alkalis & alkaline |
| D. | None of these |
| Answer» D. None of these | |
| 11. |
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 | |
| 12. |
Wrought iron is ____________________? |
| A. | High carbon iron |
| B. | Highly resistance to acid corrosion |
| C. | Malleable & ductile; and hence is used for chain links, hooks & couplings |
| D. | An alloy of iron, chromium & carbon |
| Answer» D. An alloy of iron, chromium & carbon | |
| 13. |
Zinc is highly ______________ at room temperature? |
| A. | Ductile |
| B. | Resistant to atmospheric corrosion |
| C. | Malleable |
| D. | Brittle |
| Answer» C. Malleable | |
| 14. |
Zinc is not used__________________? |
| A. | For producing zinc base die casting alloys |
| B. | In its oxide form as pigments |
| C. | As anode for corrosion prevention in boiler |
| D. | As an alloying element in various bronzes |
| Answer» E. | |
| 15. |
Zircaloy used as a fuel cladding material in a nuclear reactor (thermal) is an alloy of zirconium_______________? |
| A. | Tin, nickel, iron and chromium |
| B. | And graphite |
| C. | And copper |
| D. | None of these |
| Answer» B. And graphite | |
| 16. |
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 (1/20th of ordinary metals) ? |
| A. | Invar |
| B. | Constantan |
| C. | Chromel |
| D. | Alumel |
| Answer» B. Constantan | |
| 17. |
Which of the following is the most widely used insulating material for steam carrying pipelines ? |
| A. | Ceramic fibre blanket |
| B. | Glass wool and 85% magnesia |
| C. | Vermiculite |
| D. | Slag wool |
| Answer» C. Vermiculite | |
| 18. |
Which of the following is the most suitable material of construction for evaporator & its tubes for concentrating NaOH solution to 70% ? |
| A. | Cast iron |
| B. | Steel |
| C. | Nickel |
| D. | Karbate |
| Answer» D. Karbate | |
| 19. |
Which of the following is the hardest _______________? |
| A. | Cementite |
| B. | Pearlite |
| C. | Austenite |
| D. | Ferrite |
| Answer» D. Ferrite | |
| 20. |
Which of the following is the easiest to bend ? |
| A. | Steel |
| B. | Stainless steel |
| C. | Cast iron |
| D. | Wrought iron |
| Answer» E. | |
| 21. |
Which of the following is not used as the ceramic material in „cermets‟? |
| A. | Silicides |
| B. | Oxides |
| C. | Carbides |
| D. | Nitrides |
| Answer» E. | |
| 22. |
Which of the following is not an alloy of tin ? |
| A. | White-bearing metal |
| B. | Pewter type metal |
| C. | Soft solder |
| D. | German silver |
| Answer» E. | |
| 23. |
Which of the following has the poorest weldability ? |
| A. | Low carbon steel |
| B. | Mild steel |
| C. | Wrought iron |
| D. | High-carbon steel |
| Answer» E. | |
| 24. |
Which of the following crystal structures characterises the ferritic stainless stee l? |
| A. | Face centred cubic |
| B. | Body centred cubic |
| C. | Simple hexagonal |
| D. | None of these |
| Answer» C. Simple hexagonal | |
| 25. |
Which of the following crystal structures characterises the austenitic stainless steel ? |
| A. | Simple hexagonal |
| B. | Body centred cubic |
| C. | Face centred cubic |
| D. | None of these |
| Answer» D. None of these | |
| 26. |
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) | |
| 27. |
When iron is rusted, it is__________________? |
| A. | Converted to a fine powder |
| B. | Reduced |
| C. | Oxidised |
| D. | None of these |
| Answer» D. None of these | |
| 28. |
Water gas generator is made of__________________? |
| A. | Carbon steel-brick lined |
| B. | Stainless steel-lead lined |
| C. | Cast iron |
| D. | High carbon steel-porcelain lined |
| Answer» B. Stainless steel-lead lined | |
| 29. |
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 | |
| 30. |
Visco-elastic behaviour of materials which is time dependent is common in______________? |
| A. | Plastics |
| B. | Crystalline solid |
| C. | Non-crystalline solids |
| D. | Non-crystalline organic polymer |
| Answer» E. | |
| 31. |
Vessels made of _____________ can be used to store dry chlorine? |
| A. | Thermoplastic materials |
| B. | Nickel |
| C. | Steel or iron |
| D. | None of these |
| Answer» D. None of these | |
| 32. |
Very high sulphur in pig iron makes ___________________? |
| A. | Its casting unsound |
| B. | Its hard and machinable |
| C. | Its brittle and malleable |
| D. | All A., B. & C. |
| Answer» B. Its hard and machinable | |
| 33. |
Valves in pipe size of 2″ and under are normally made of_______________________? |
| A. | Wrought iron |
| B. | Brass |
| C. | Bronze |
| D. | Monel |
| Answer» C. Bronze | |
| 34. |
Urea autoclave is made of_________________? |
| A. | Cast iron |
| B. | Refractory blocks |
| C. | Stainless steel |
| D. | Lead lined steel |
| Answer» D. Lead lined steel | |
| 35. |
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 | |
| 36. |
Trough of an apron conveyor is made of___________________? |
| A. | Lead lined concrete vessel |
| B. | Wood |
| C. | Metal |
| D. | Either B. or C. |
| Answer» E. | |
| 37. |
To improve the machinability of steel, it is generally subjected to_______________? |
| A. | Spheroidising |
| B. | Tempering |
| C. | Normalising |
| D. | Annealing |
| Answer» B. Tempering | |
| 38. |
To improve the machinability of steel by its softening, it is subjected to __________________? |
| A. | Cold working |
| B. | Annealing |
| C. | Shot blasting |
| D. | Heating |
| Answer» C. Shot blasting | |
| 39. |
Titanium metal_________________? |
| A. | Exists in three allotropic forms |
| B. | Cannot be welded |
| C. | Is used in oceanographic and space exploration applications |
| D. | None of these |
| Answer» D. None of these | |
| 40. |
Tin coating on metals is not done by_____________________? |
| A. | Spraying |
| B. | Powder metallurgy |
| C. | Hot dipping |
| D. | Electro-deposition |
| Answer» C. Hot dipping | |
| 41. |
Tin vessels are corroded by____________________? |
| A. | Anhydrous ammonia |
| B. | Aromatic solvents |
| C. | Synthetic detergent solution |
| D. | None of these |
| Answer» E. | |
| 42. |
Tin in its pure form is used for making_______________? |
| A. | Cans for food packing |
| B. | Collapsible tubes for toilet preparations |
| C. | Foil for wrapping cheese |
| D. | All A., B. and C. |
| Answer» E. | |
| 43. |
Tin base and lead base alloys are used for bearing materials. Tin compared to lead has lower_________________? |
| A. | Price |
| B. | Corrosion resistance |
| C. | Thermal conductivity |
| D. | Abundant availability |
| Answer» E. | |
| 44. |
Thermosetting resins are those polymers, which__________________? |
| A. | Do not increase in plasticity with rise in temperature |
| B. | Allow slip to occur between molecules |
| C. | Do not take on a permanent set |
| D. | None of these |
| Answer» B. Allow slip to occur between molecules | |
| 45. |
Thermosetting polymers are_________________? |
| A. | Injection moulded |
| B. | Cast molded |
| C. | Extruded |
| D. | None of these |
| Answer» C. Extruded | |
| 46. |
Thermoplastic resins are those polymers, which____________________? |
| A. | Has decreased plasticity at increasing temperature |
| B. | Cannot be moulded |
| C. | Easily deform under pressure at high temperature |
| D. | None of these |
| Answer» D. None of these | |
| 47. |
Thermometer bulb & capillary in case of mercury filled pressure spring expansion thermometer is normally made of ______________ as mercury does not amalgamate with it? |
| A. | Copper |
| B. | Copper alloys |
| C. | Stainless steel |
| D. | Monel |
| Answer» D. Monel | |
| 48. |
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. | Zircaloy |
| D. | Graphite |
| Answer» C. Zircaloy | |
| 49. |
The temperature at which new grains are formed in the metal is called the ______________ temperature? |
| A. | Eutectic |
| B. | Recrystallisation |
| C. | Upper critical |
| D. | Lower critical |
| Answer» C. Upper critical | |
| 50. |
The specific gravity of coal depends mainly on its ______________ content? |
| A. | Carbon |
| B. | Volatile matter |
| C. | Ash |
| D. | Moisture |
| Answer» D. Moisture | |