chemical engineering materials and construction MCQs – Page 4

Practise multiple-choice questions from chemical engineering materials and construction for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering materials and construction Mcqs
61. 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_________________?
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A. Dilute HCI

B. Acetic acid

C. Concentrated H2SO4

D. None of these

62. Silicon percentage in acid resistant cast iron is about________________?
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A. 20

B. 4

C. 14

D. 8

63. Spark plugs, ignition tubes and electrodes are made of nickel ____________ alloys?
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A. Manganese

B. Iron

C. Copper

D. Beryllium

64. Concrete tank can be used to store________________?
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A. Alum

B. Ferrous sulphate

C. Sulphuric acid

D. Saturated brine
65. German silver used for decorative purposes contains maximum percentage of___________________?
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A. Copper

B. Zinc

C. Nickel

D. Silver

66. Concentrated HCl at 30C can be stored in a vessel made of ________________________?
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A. Cast iron and aluminium

B. Stainless steel and high silicon cast iron

C. PTFE and porcelain

D. None of these

67. Tin vessels are corroded by____________________?
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A. None of these

B. Anhydrous ammonia

C. Aromatic solvents

D. Synthetic detergent solution

68. Titanium metal_________________?
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A. Exists in three allotropic forms

B. Is used in oceanographic and space exploration applications

C. None of these

D. Cannot be welded

69. Presence of silicon in steel_____________________?
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A. Decreases the blow holes formation tendency in castings

B. None of these

C. Indicates that steel is not deoxidised properly

D. Is in the form of free Si

70. Addition of tungsten to steel imparts___________________?
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A. Magnetic properties

B. Cutting hardness

C. Corrosion resistance

D. Ductility

71. Which of the following alloy steels is the most suitable for making gun barrels and projectiles ?
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A. Cobalt steel

B. Molybdenum steel

C. Tungsten steel

D. Nickel-chrome steel
72. Tubes of multiple effect evaporator used for concentration of sugar cane juice are made of __________________?
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A. Brass

B. Copper

C. Nickel

D. Stainless steel

73. Chlorination of benzene is done to produce benzene hexachloride (a pesticide) in a photochemical reactor lined with_____________________?
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A. Fireclay bricks

B. Lead or glass

C. PVC

D. Karbate

74. The temperature at which new grains are formed in the metal is called the ______________ temperature?
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A. Eutectic

B. Recrystallisation

C. Upper critical

D. Lower critical

75. Which of the following is the hardest _______________?
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A. Cementite

B. Ferrite

C. Austenite

D. Pearlite

76. In hot wire anemometer used for gas flow measurement, the wire is normally made of ______________________?
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A. Chromium

B. Constantan

C. Copper

D. Platinum
77. Molten phthalic anhydride is stored in a/an _______________ vessel?
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A. Lead lined steel

B. Glass lined steel

C. Nickel clad steel

D. Aluminium
78. Tempering of steel is done to make it________________?
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A. Soft

B. Hard

C. Rollable

D. Brittle

79. Rotary driers are generally made of_______________?
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A. High silicon iron (14% Si)

B. Mild steel

C. Cast iron

D. Tin lined with refractory bricks

80. Dies for wire drawing are generally made of__________________?
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A. High carbon steel

B. Carbides

C. Mild steel

D. Stainless steel