MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 1037 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. |
Concentrated HCl at 30°C can be stored in a vessel made of |
| A. | PTFE and porcelain. |
| B. | cast iron and aluminium. |
| C. | stainless steel and high silicon cast iron. |
| D. | none of these. |
| Answer» B. cast iron and aluminium. | |
| 2. |
100% HSO 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. | |
| 3. |
Most suitable material for high pressure vessel operating at 500 atm. and 500° C is |
| A. | molybdenum stainless steel. |
| B. | 18/8 stainless steel. |
| C. | mild steel. |
| D. | high silicon iron (14% Si). |
| Answer» B. 18/8 stainless steel. | |
| 4. |
Purity of electrical grade aluminium should be ≥ __________ percent. |
| A. | 95 |
| B. | 99.5 |
| C. | 85 |
| D. | 90 |
| Answer» C. 85 | |
| 5. |
Alpha iron is stable __________ °C. |
| A. | above 1403 |
| B. | upto 910 |
| C. | above 1800 |
| D. | between 910 & 1403 |
| Answer» C. above 1800 | |
| 6. |
Bog iron used for the adsorption of HS 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). | |
| 7. |
Which of the following materials may prove unsuitable for handling acetic acid (glacial & anhydrous) at 40°C ? |
| A. | Silicone rubber, teflon, procelain and wood. |
| B. | Nickel, monel, stainless steel and graphite. |
| C. | Aluminium, copper, high silicon iron. |
| D. | Brass, cast iron, mild steel and tin. |
| Answer» E. | |
| 8. |
In SO absorber (Contact Process), packing material used is of |
| A. | cast iron |
| B. | chemical stoneware |
| C. | karbate |
| D. | mild steel |
| Answer» C. karbate | |
| 9. |
SO is absorbed using HSO 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. | |
| 10. |
Approximate value of the modulus of elasticity for steel is about __________ x l0kg/cm. |
| A. | 0.5 |
| B. | 2 |
| C. | 40 |
| D. | 75 |
| Answer» C. 40 | |
| 11. |
Copper is dissolved from its ore by HSO 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) | |
| 12. |
Specify the material of construction suitable for handling concentrated HNO 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 | |
| 13. |
HSO (< 50% concentration) is corrosive to |
| A. | aluminium, mild steel, stainless steel, concrete & tin. |
| B. | copper, cast iron & high silicon iron (14% Si). |
| C. | rubber (butyl and hard), silicone rubber & teflon. |
| D. | glass, graphite, porcelain & stoneware. |
| Answer» B. copper, cast iron & high silicon iron (14% Si). | |
| 14. |
Lead pipes are not safe for carraying drinking water, because water, containing dissolved oxygen attacks lead thereby forming poisonous Pb(OH). Lead pipes are readily corroded by |
| A. | dilute HC1 |
| B. | acetic acid |
| C. | concentrated H |
| D. | SO |
| E. | none of these |
| Answer» C. concentrated H | |
| 15. |
Lead pipes are not safe for carrying drinking water because water containing dissolved oxygen attacks lead thereby forming poisonous Pb (OH). Lead pipes are readily corroded by |
| A. | dilute HCI |
| B. | acetic acid |
| C. | concentrated H |
| D. | SO |
| E. | none of these |
| Answer» C. concentrated H | |
| 16. |
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. | |
| 17. |
Addition of __________ to the steel helps in increasing the residual magnetism insteel used for making magnets. |
| A. | hromium |
| B. | ickel |
| C. | ungsten |
| D. | obalt |
| Answer» E. | |
| 18. |
Which of the following material of construction may be recommended by a chemical engineer for handling a gaseous chlorine (dry or wet) stream in a fluid flow system? |
| A. | igh silicon iron, silicon rubber, Kel-F and teflon |
| B. | ild steel and stainless steel |
| C. | ast iron, tin and aluminium |
| D. | opper, nickel and monel |
| Answer» B. ild steel and stainless steel | |
| 19. |
Chlorination of benzene is done to produce benzene hexachloride (a pesticide) in aphotochemical reactor lined with |
| A. | arbate |
| B. | ead or glass |
| C. | ireclay bricks |
| D. | VC |
| Answer» C. ireclay bricks | |
| 20. |
A steel alloy containing 36% nickel is called __________ , which has a zero co- efficient of expansion. |
| A. | ustenitic stainless steel |
| B. | eat resisting steel |
| C. | nvar |
| D. | igh speed steel |
| Answer» D. igh speed steel | |
| 21. |
Which of the following mechanical properties of a material is most structureinsensitive? |
| A. | odulus of elasticity (young |
| B. | oughness |
| C. | ercentage reduction of area |
| D. | ensile strength |
| Answer» B. oughness | |
| 22. |
Which of the following materials may prove unsuitable for handling acetic acid(glacial & anhydrous) at 40°C? |
| A. | ilicone rubber, teflon, procelain and wood |
| B. | ickel, monel, stainless steel and graphite |
| C. | luminium, copper, high silicon iron |
| D. | rass, cast iron, mild steel and tin |
| Answer» E. | |
| 23. |
Softness of silver can be converted into hardness by alloying it with smallquantity of |
| A. | opper & nickel |
| B. | inc |
| C. | luminium |
| D. | in |
| Answer» B. inc | |
| 24. |
Which of the following heat treatment processes is used for softening the hardenedmaterial? |
| A. | ormalising |
| B. | empering |
| C. | nnealing |
| D. | one of these |
| Answer» C. nnealing | |
| 25. |
Which of the following is the most elastic material? |
| A. | lastic |
| B. | lass |
| C. | teel |
| D. | ubber |
| Answer» D. ubber | |
| 26. |
Which of the following has the least value of ultimate tensile strength (UTS)? |
| A. | edium carbon steel |
| B. | igh carbon steel |
| C. | ast iron |
| D. | rought iron |
| Answer» D. rought iron | |
| 27. |
Caustic soda is produced in a mercury cell having anode and cathode maderespectively of moving mercury and |
| A. | oving mercury and graphite |
| B. | raphite and moving mercury |
| C. | oving mercury and carbon |
| D. | oving mercury and crimped steel wire |
| Answer» C. oving mercury and carbon | |
| 28. |
The behaviour of visco-elastic material is time dependent. This behaviour is commo in __________ materials. |
| A. | on-crystalline solid |
| B. | rystalline |
| C. | ubberry |
| D. | on-crystalline organic polymeric |
| Answer» E. | |
| 29. |
Slow and progressive deformation of a material with time under constant stress iscalled |
| A. | reep |
| B. | rosion |
| C. | esilience |
| D. | one of these |
| Answer» B. rosion | |
| 30. |
Acetaldehyde is produced by hydration of acetylene in a sulphuric acid solution ofmercuric sulphate. Hydration tower is made of |
| A. | ubber lined mild steel |
| B. | ead lined mild steel |
| C. | luminium |
| D. | ast iron |
| Answer» B. ead lined mild steel | |
| 31. |
The melleability of a material is the property by virtue of which it can be rolledor hammered into thin sheets. Which of the following materials has the miximummalleability? |
| A. | ead |
| B. | opper |
| C. | luminium |
| D. | rought iron |
| Answer» B. opper | |
| 32. |
Austenitic manganese steel used for making jaws of crushing machines contains about__________ percent manganese. |
| A. | .5-2 |
| B. | .5-4.5 |
| C. | -9 |
| D. | 2-14 |
| Answer» E. | |
| 33. |
Which of the following metals in not used for coating of the base metal to guard it against corrosion? |
| A. | ead |
| B. | admium |
| C. | agnesium |
| D. | luminium |
| Answer» D. luminium | |
| 34. |
Which of the following constituents of cast iron is mainly responsible for imparting it an anti-corrosive property? |
| A. | ilicon |
| B. | hosphorus |
| C. | ulphur |
| D. | one of these |
| Answer» B. hosphorus | |
| 35. |
High speed steel tools retain their hardness upto a temperature of __________ °C. |
| A. | 00 |
| B. | 50 |
| C. | 00 |
| D. | 100 |
| Answer» D. 100 | |
| 36. |
Which of the following is universally employed as the low expansion metal in thebimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and hasvery low co-efficient of expansion (l/20th of ordinary metals)? |
| A. | nvar |
| B. | onstantan |
| C. | hromel |
| D. | lumel |
| Answer» B. onstantan | |
| 37. |
Lead pipes are not safe for carrying drinking water because water containingdissolved oxygen attacks lead thereby forming poisonous Pb (OH)2. Lead pipes are readily corroded by |
| A. | ilute HCI |
| B. | cetic acid |
| C. | oncentrated H₂SO₄ |
| D. | one of these |
| Answer» C. oncentrated H₂SO₄ | |
| 38. |
Which of the following materials may prove unsuitable for handling acetic acid (glacial & anhydrous) at 40°C ? |
| A. | Silicone rubber, teflon, procelain and wood. |
| B. | Nickel, monel, stainless steel and graphite. |
| C. | Aluminium, copper, high silicon iron. |
| D. | Brass, cast iron, mild steel and tin. |
| Answer» E. | |
| 39. |
Which of the following is the hardest material ? |
| A. | Topaz |
| B. | Quartz |
| C. | Corrundum |
| D. | Flourite |
| Answer» D. Flourite | |
| 40. |
Bog iron used for the adsorption of H₂S 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). | |
| 41. |
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. | |
| 42. |
__________ does not contain copper as an alloying element. |
| A. | Nichrome |
| B. | Manganin |
| C. | Perminivar |
| D. | Monel metal |
| Answer» B. Manganin | |
| 43. |
Approximate value of the modulus of elasticity for steel is about __________ x 10⁶ kg/cm². |
| A. | 0.5 |
| B. | 2 |
| C. | 40 |
| D. | 75 |
| Answer» C. 40 | |
| 44. |
Lead pipes are not safe for carrying drinking water because water containing dissolved oxygen attacks lead thereby forming poisonous Pb(OH)₂. Lead pipes are readily corroded by |
| A. | dilute HCI |
| B. | acetic acid |
| C. | concentrated H₂SO₄ |
| D. | none of these |
| Answer» C. concentrated H₂SO₄ | |
| 45. |
Inconel is an alloy of |
| A. | tin, zinc and nickel |
| B. | iron, nickel and chromium |
| C. | copper and nickel |
| D. | copper and tin |
| Answer» C. copper and nickel | |
| 46. |
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 | |
| 47. |
Which of the following is the softest material? |
| A. | Quartz |
| B. | Calcite |
| C. | Corrundum |
| D. | Flourite |
| Answer» C. Corrundum | |
| 48. |
Which of the following will have the highest melting point? |
| A. | Pig iron |
| B. | Mild steel |
| C. | Wrought iron |
| D. | High carbon steel |
| Answer» D. High carbon steel | |
| 49. |
Most suitable material for high pressure vessel operating at 500 atm. and 500° C is |
| A. | Molybdenum stainless steel |
| B. | 18/8 stainless steel |
| C. | Mild steel |
| D. | High silicon iron (14% Si) |
| Answer» B. 18/8 stainless steel | |
| 50. |
Thermosetting polymers are |
| A. | Injection moulded |
| B. | Cast molded |
| C. | Extruded |
| D. | None of these |
| Answer» C. Extruded | |