MCQOPTIONS
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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.
| 51. |
The softest material just next to talc in the Mhos scale is_________________? |
| A. | Quartz |
| B. | Gypsum |
| C. | Feldspar |
| D. | Fluorite |
| Answer» C. Feldspar | |
| 52. |
The softest material just next to talc in the Mho’s scale is___________________? |
| A. | Quartz |
| B. | Gypsum |
| C. | Feldspar |
| D. | Fluorite |
| Answer» C. Feldspar | |
| 53. |
The softest material in Mho’s scale (for measuring hardness) is________________? |
| A. | Talc |
| B. | Gypsum |
| C. | Rubber |
| D. | None of these |
| Answer» B. Gypsum | |
| 54. |
The range of Mho’s scale of hardness is from________________? |
| A. | 1 to 15 |
| B. | 1 to 8 |
| C. | 1 to10 |
| D. | 0 to 10 |
| Answer» D. 0 to 10 | |
| 55. |
The purpose of nitriding the steel is to___________________? |
| A. | Harden its surface |
| B. | Soften its surface |
| C. | Improve its reliability |
| D. | None of these |
| Answer» B. Soften its surface | |
| 56. |
The process of heating the cold pressed metallic powder is called ______________ in powder metallurgy? |
| A. | Precipitation |
| B. | Fusion |
| C. | Sintering |
| D. | Agglomeration |
| Answer» D. Agglomeration | |
| 57. |
The process of coating steel sheets by zinc to improve its corrosion resistance is called___________________? |
| A. | Calorising |
| B. | Galvanising |
| C. | Zincification |
| D. | Tempering |
| Answer» C. Zincification | |
| 58. |
The presence of impurities in iron_________________? |
| A. | Increases its melting point |
| B. | Does not affect its melting point |
| C. | Decreases its melting point |
| D. | Makes it malleable |
| Answer» D. Makes it malleable | |
| 59. |
The preferred material of construction for storage tanks for 98% sulphuric acid is_________________? |
| A. | Aluminium |
| B. | Lead |
| C. | Stainless steel 316 |
| D. | Mild steel |
| Answer» C. Stainless steel 316 | |
| 60. |
The phenomenon in which slow extension of material takes place with the time at constant load is called________________? |
| A. | Plasticity |
| B. | Creep |
| C. | Elasticity |
| D. | Ductility |
| Answer» C. Elasticity | |
| 61. |
The most resistant material to alkaline corrosion is____________________? |
| A. | Duriron |
| B. | Nickel |
| C. | Aluminium |
| D. | Karbate |
| Answer» C. Aluminium | |
| 62. |
The most distinguished property of malleable cast iron is its high_________________? |
| A. | Ductility |
| B. | Hardness |
| C. | Malleability |
| D. | None of these |
| Answer» B. Hardness | |
| 63. |
The most commonly used resin for making reinforced plastic is___________________? |
| A. | Unsaturated polyester |
| B. | Polypropylene |
| C. | Polyurethane |
| D. | Nylon-6 |
| Answer» B. Polypropylene | |
| 64. |
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 | |
| 65. |
The maximum percentage of chromium that can be added to steel is about____________________? |
| A. | 12 |
| B. | 18 |
| C. | 24 |
| D. | 30 |
| Answer» C. 24 | |
| 66. |
The material used in the filament of electric bulbs is_________________? |
| A. | Nichrome |
| B. | Tungsten |
| C. | Constantan |
| D. | German silver |
| Answer» C. Constantan | |
| 67. |
The material of construction of bearings is__________________? |
| A. | Cast iron |
| B. | Babbitt metal |
| C. | Pig iron |
| D. | Steel |
| Answer» C. Pig iron | |
| 68. |
The material of construction of pressure mills used for squeezing out the juice from sugar cane is__________________? |
| A. | Stainless steel |
| B. | Cast iron |
| C. | Mild steel |
| D. | Monel |
| Answer» C. Mild steel | |
| 69. |
The main purpose of galvanising iron sheets is to___________________? |
| A. | Harden the surface |
| B. | Increase its glossiness and lustre |
| C. | Prevent the action of water |
| D. | Prevent the action of oxygen |
| Answer» D. Prevent the action of oxygen | |
| 70. |
The main constituent of carborundum is ___________________ carbide? |
| A. | Calcium |
| B. | Silicon |
| C. | Boron |
| D. | Aluminium |
| Answer» C. Boron | |
| 71. |
The loss of strength in compression which occurs, when there is a gain of strength in tension due to over loading is called__________________? |
| A. | Bauschinger effect |
| B. | Hooke’s effect |
| C. | Hysteresis |
| D. | Relaxation |
| Answer» B. Hooke’s effect | |
| 72. |
The increase in hardness of metal due to its cold working is termed as the _______________ hardening? |
| A. | Work |
| B. | Age |
| C. | Induction |
| D. | Flame |
| Answer» B. Age | |
| 73. |
The impure iron (pig iron) that is tapped out from blast furnace contains about _____________ percent carbon? |
| A. | 0.2 |
| B. | 2 |
| C. | 4 |
| D. | 8 |
| Answer» D. 8 | |
| 74. |
The high expansion metal normally used in the bimetallic thermometer is _______________ temperature measurement? |
| A. | Brass for low |
| B. | Nickel alloys for high |
| C. | Both A. & B. |
| D. | Aluminium for all |
| Answer» D. Aluminium for all | |
| 75. |
The heat treatment process applied to cold formed steel parts is ____________________? |
| A. | Normalising |
| B. | Tempering |
| C. | Artificial ageing |
| D. | Solution annealing |
| Answer» E. | |
| 76. |
The heat treatment process to which castings and the steel balls produced by cold heading are subjected is____________________? |
| A. | Tempering |
| B. | Normalising |
| C. | Annealing |
| D. | None of these |
| Answer» C. Annealing | |
| 77. |
The hardest material just prior to diamond in Mho’s scale is___________________? |
| A. | Topaz |
| B. | Carborundum |
| C. | Corundum |
| D. | Calcite |
| Answer» D. Calcite | |
| 78. |
The hardest material just prior to diamond in Mhos scale is_________________? |
| A. | Topaz |
| B. | Carborundum |
| C. | Corundum |
| D. | Calcite |
| Answer» D. Calcite | |
| 79. |
The formation of oxide film on a metal due to atmospheric exposure reduces its____________? |
| A. | Toughness |
| B. | Stiffness |
| C. | Creep limit |
| D. | All A., B. & C. |
| Answer» D. All A., B. & C. | |
| 80. |
The fermenter used in the production of penicillin (by deep fermentation process) is made of___________________? |
| A. | Glass |
| B. | Glass lined steel |
| C. | High silicon cast iron |
| D. | Porcelain |
| Answer» C. High silicon cast iron | |
| 81. |
The fermenter used for the production of ethyl alcohol from molasses is made of________________? |
| A. | Wood |
| B. | Concrete |
| C. | Copper bearing steel |
| D. | Porcelain |
| Answer» D. Porcelain | |
| 82. |
The electrical conductivity of a ______________ decreases with rise in temperature? |
| A. | Metal/alloy |
| B. | Semi-conductor |
| C. | Dielectric |
| D. | None of these |
| Answer» B. Semi-conductor | |
| 83. |
The digester of a Gobar gas plant is a___________________? |
| A. | Mild steel drum |
| B. | Stainless steel vessel |
| C. | Masonry well |
| D. | Cast iron vessel |
| Answer» D. Cast iron vessel | |
| 84. |
The damage/deterioration of metals by the ______________ action of fluids is called ‘erosion’? |
| A. | Abrasive |
| B. | Corrosive |
| C. | Both A. & B. |
| D. | Neither A. nor B. |
| Answer» B. Corrosive | |
| 85. |
The crystal structure of most of the common metals is_____________________? |
| A. | Orthorhombic |
| B. | Cubic |
| C. | Hexagonal |
| D. | None of these |
| Answer» C. Hexagonal | |
| 86. |
The chlorinator used in the manufacture of DDT is made of___________________? |
| A. | Glass |
| B. | Glass lined steel |
| C. | Teflon |
| D. | Bakelite |
| Answer» C. Teflon | |
| 87. |
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 | |
| 88. |
The ‘bomb’ in the bomb calorimeter is made of___________________? |
| A. | Molybdenum stainless steel |
| B. | Mild steel |
| C. | High silicon iron (14% Si) |
| D. | Copper |
| Answer» B. Mild steel | |
| 89. |
The behaviour of visco-elastic material is time dependent. This behaviour is common in _____________ materials? |
| A. | Non-crystalline solid |
| B. | Crystalline |
| C. | Rubbery |
| D. | Non-crystalline organic polymeric |
| Answer» E. | |
| 90. |
The addition of antimony in tin-based alloys improves its________________? |
| A. | Rupture strength and hot hardness |
| B. | Impact strength and bonding strength |
| C. | Deformation resistance |
| D. | Wear resistance |
| Answer» D. Wear resistance | |
| 91. |
Rubber lined vessels are corroded by the action of__________________? |
| A. | Aqua regia |
| B. | Chloroform |
| C. | Sulphuric acid (95%) |
| D. | All A., B. and C. |
| Answer» E. | |
| 92. |
Rubber lined pumps can be used to pump_________________? |
| A. | Caustic soda |
| B. | Chlorinated brine |
| C. | Hypochlorous acid |
| D. | All A., B. and C. |
| Answer» E. | |
| 93. |
Rotary kilns in cement industry are lined with _____________bricks? |
| A. | Fireclay |
| B. | Silica |
| C. | Lead |
| D. | High alumina & high magnesia |
| Answer» E. | |
| 94. |
Rotary driers are generally made of_______________? |
| A. | Cast iron |
| B. | Mild steel |
| C. | High silicon iron (14% Si) |
| D. | Tin lined with refractory bricks |
| Answer» C. High silicon iron (14% Si) | |
| 95. |
Residual magnetism in steel for magnets is increased by the addition of__________________? |
| A. | Nickel |
| B. | Cobalt |
| C. | Tungsten |
| D. | Chromium |
| Answer» C. Tungsten | |
| 96. |
Refined acetic acid storage vessel are made of___________________? |
| A. | Copper |
| B. | Aluminium |
| C. | High carbon steel |
| D. | Nickel |
| Answer» C. High carbon steel | |
| 97. |
Reduction in the grain size reduces the _______________ of the material? |
| A. | Fatigue resistance |
| B. | Tensile strength |
| C. | Creep resistance |
| D. | All A., B. & C. |
| Answer» D. All A., B. & C. | |
| 98. |
Reactor used in the production of polyvinyl chloride (PVC) is made of____________________? |
| A. | Nickel or glass lined steel |
| B. | Aluminium |
| C. | Tantalum |
| D. | Lead |
| Answer» B. Aluminium | |
| 99. |
Purity of electrical grade aluminium should be ≥ _____________ percent? |
| A. | 95 |
| B. | 99.5 |
| C. | 85 |
| D. | 90 |
| Answer» C. 85 | |
| 100. |
Pure nickel is___________________? |
| A. | Ferromagnetic above its curie point (i.e., 415°C) |
| B. | Having h.c.p. crystal lattice |
| C. | Ferromagnetic at room temperature |
| D. | Not resistant to oxidation at high temperature |
| Answer» D. Not resistant to oxidation at high temperature | |