MCQOPTIONS
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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.
| 51. |
Which of the following is the hardest? |
| A. | Cementite |
| B. | Pearlite |
| C. | Austenite |
| D. | Ferrite |
| Answer» D. Ferrite | |
| 52. |
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. | |
| 53. |
Which of the following commercial metals is most abundantly found in India? |
| A. | Copper |
| B. | Aluminium |
| C. | Nickel |
| D. | Zinc |
| Answer» C. Nickel | |
| 54. |
Nitriding of steel is done (in electric furnace) at __________ °C. |
| A. | 510 |
| B. | 1720 |
| C. | 2210 |
| D. | 910 |
| Answer» B. 1720 | |
| 55. |
Coke oven walls are lined with __________ bricks. |
| A. | Silica |
| B. | Tar-dolomite |
| C. | Low thermal conductivity |
| D. | Fire clay |
| Answer» B. Tar-dolomite | |
| 56. |
Which of the following is not a copper based alloy with nickel? |
| A. | German silver |
| B. | Monel metal |
| C. | Inconel |
| D. | Constantan |
| Answer» D. Constantan | |
| 57. |
Which of the following is not shipped in mild steel containers? |
| A. | Acetone |
| B. | Ammonia |
| C. | Ethyl alcohol |
| D. | Formic acid |
| Answer» E. | |
| 58. |
Which of the following is the most prone to atmospheric corrosion? |
| A. | Silver |
| B. | Iron |
| C. | Tin |
| D. | Copper |
| Answer» C. Tin | |
| 59. |
Which of the following would not be a suitable material of construction for handling aqueous hydrofluoric acid (HF) at 100°C ? |
| A. | Monel |
| B. | Stainless steel |
| C. | Graphite |
| D. | Kel-F and teflon |
| Answer» C. Graphite | |
| 60. |
Which of the following stainless steels is non-magnetic? |
| A. | Ferritic |
| B. | Martensitic |
| C. | Austenitic |
| D. | None of these |
| Answer» D. None of these | |
| 61. |
Which of the following is not a nickel based alloy? |
| A. | Inconel |
| B. | Hastelloys |
| C. | Nimonics |
| D. | Babbit metal |
| Answer» E. | |
| 62. |
Alpha iron is stable __________ °C. |
| A. | Above 1403 |
| B. | Upto 910 |
| C. | Above 1800 |
| D. | Between 910 & 1403 |
| Answer» C. Above 1800 | |
| 63. |
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) | |
| 64. |
Which of the following is not an alloy of copper? |
| A. | Muntz metal |
| B. | Admirability gun metal |
| C. | German silver |
| D. | Pewter metal |
| Answer» E. | |
| 65. |
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 | |
| 66. |
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 | |
| 67. |
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) | |
| 68. |
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 | |
| 69. |
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. | |
| 70. |
Which of the following is a low melting point metal? |
| A. | Stainless steel |
| B. | Wrought iron |
| C. | Tin |
| D. | Copper |
| Answer» D. Copper | |
| 71. |
Purity of electrical grade aluminium should be ≥ __________ percent. |
| A. | 95 |
| B. | 99.5 |
| C. | 85 |
| D. | 90 |
| Answer» C. 85 | |
| 72. |
Which of the following has the highest compressive strength? |
| A. | Wrought iron |
| B. | Cast iron |
| C. | Mild steel |
| D. | High carbon steel |
| Answer» E. | |
| 73. |
Which of the following crystal structures characterises the ferritic stainless steel? |
| A. | Face centred cubic |
| B. | Body centred cubic |
| C. | Simple hexagonal |
| D. | None of these |
| Answer» C. Simple hexagonal | |
| 74. |
Which of the following has the poorest wel-dability? |
| A. | Low carbon steel |
| B. | Mild steel |
| C. | Wrought iron |
| D. | High-carbon steel |
| Answer» E. | |
| 75. |
Which of the following exercises most powerful influence on the mechanical properties of steel? |
| A. | Manganese |
| B. | Carbon |
| C. | Phosphorous |
| D. | Silicon |
| Answer» C. Phosphorous | |
| 76. |
Which is the purest form of iron? |
| A. | Wrought iron |
| B. | Pig iron |
| C. | Bessemer iron |
| D. | Grey iron |
| Answer» B. Pig iron | |
| 77. |
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 | |
| 78. |
Which has the maximum melting point out of the following? |
| A. | Steel |
| B. | Cast iron |
| C. | Stainless steel |
| D. | Wrought iron |
| Answer» E. | |
| 79. |
Which of the following is not a non-ferrous alloy? |
| A. | Meehanite |
| B. | Magnalium |
| C. | Gun metal |
| D. | Muntz metal |
| Answer» B. Magnalium | |
| 80. |
Which of the following is a non-magnetic material? |
| A. | Cobalt |
| B. | Zinc |
| C. | Nickel |
| D. | None of these |
| Answer» C. Nickel | |
| 81. |
Which of the following pairs of elements may form an alloy? |
| A. | Iron & carbon |
| B. | Iron & mercury |
| C. | Platinum & mercury |
| D. | None of these |
| Answer» B. Iron & mercury | |
| 82. |
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 | |
| 83. |
Which of the following is not used as the ceramic material in 'cermets'? |
| A. | Silicides |
| B. | Oxides |
| C. | Carbides |
| D. | Nitrides |
| Answer» E. | |
| 84. |
Which one occupies the lowermost position in the electromotive series of metals? |
| A. | Aluminium |
| B. | Noble metals (Ag, Pt, Au) |
| C. | Zinc |
| D. | Alkali metals (K, Na, Li) |
| Answer» C. Zinc | |
| 85. |
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 | |
| 86. |
Which one contains the least percentage of carbon? |
| A. | Wrought iron |
| B. | High speed steel |
| C. | Cast iron |
| D. | Pig iron |
| Answer» B. High speed steel | |
| 87. |
Which of the following has a very high carbide forming tendency in steels? |
| A. | Silicon |
| B. | Chromium |
| C. | Nickel |
| D. | Vanadium |
| Answer» E. | |
| 88. |
Which of the following has no effect on the carbide forming tendency in steels? |
| A. | Molybdenum |
| B. | Phosphorus |
| C. | Chromium |
| D. | Vanadium |
| Answer» C. Chromium | |
| 89. |
H₂SO₄ (< 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) | |
| 90. |
How many atoms are there per unit cell in a body centred cubic lattice system? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 6 |
| Answer» B. 3 | |
| 91. |
Bell metal is an alloy of |
| A. | Copper & zinc |
| B. | Copper & tin |
| C. | Copper & nickel |
| D. | Zinc & tin |
| Answer» C. Copper & nickel | |
| 92. |
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 | |
| 93. |
Which of the following is not an alloy of nickel and chromium? |
| A. | Inconel |
| B. | Hastealloy |
| C. | Nimonic alloys |
| D. | Duralumin |
| Answer» E. | |
| 94. |
How many molecules per unit cell are there in a face centred cubic lettice? |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» C. 6 | |
| 95. |
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 | |
| 96. |
In SO₃ absorber (Contact Process), packing material used is of |
| A. | Cast iron |
| B. | Chemical stoneware |
| C. | Karbate |
| D. | Mild steel |
| Answer» C. Karbate | |
| 97. |
Which of the following has the least carbon percentage? |
| A. | Low carbon steel |
| B. | Mild steel |
| C. | Wrought iron |
| D. | White cast iron |
| Answer» D. White cast iron | |
| 98. |
Which of the following undergoes granular fracture? |
| A. | Wrought iron |
| B. | Steel |
| C. | Cast iron |
| D. | None of these |
| Answer» C. Cast iron | |
| 99. |
Which of the following is the most widely used insulating material for steam carray-ing pipelines? |
| A. | Ceramic fibre blanket |
| B. | Glass wool and 85% magnesia |
| C. | Vermiculite |
| D. | Slag wool |
| Answer» C. Vermiculite | |
| 100. |
Lead pipes are not safe for carraying drinking water, because water, containing dissolved oxygen attacks lead thereby forming poisonous Pb(OH)₂. Lead pipes are readily corroded by |
| A. | Dilute HC₁ |
| B. | Acetic acid |
| C. | v |
| D. | None of these |
| Answer» C. v | |