chemical engineering materials and construction Mcqs
52. Cast irons are generally specified by their_________________?
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A. Manufacturing process

B. Carbon content

C. Hardness

D. Tensile strength
54. Nickel and copper are the basic constituents of__________________?
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A. German silver

B. Monel metal

C. Hastelloy

D. Inconel

55. Cermets are ______________ materials?
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A. Reinforced

B. Fully metallic

C. Abrasive

D. Refractory
56. Babbitt metal is not a___________________________?
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A. Tin base alloy

B. Lead base alloy

C. White metal

D. Pure metal
59. Presence of high amount of silicon in cast iron________________?
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A. Increases the contraction of the metal

B. Reduces its fluidity

C. Suppresses the decomposition of Fe3C

D. Increases the formation of graphite
60. Hot working of lead is carried out at_________________?
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A. 373 K

B. 75 C

C. 150 C

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

B. Ferrous sulphate

C. Sulphuric acid

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

B. Ferrite

C. Austenite

D. Pearlite

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
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

82. Work hardening of a material ________________?
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A. Decreases its ductility

B. Does not affect its ductility

C. Increases its ductility

D. Decreases its tensile strength

83. Heavy duty bearings are usually made of___________________?
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A. Phosphorous bronze

B. Monel

C. White metal

D. Zinc

84. Plastics are____________________?
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A. Not suitable for drainage pipe manufacture

B. All A., B. & C.

C. Non-biodegradable

D. Used in very high temperature applications

88. Presence of high phosphorous in cast iron increases its____________________?
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A. Fluidity

B. Tensile strength

C. Shrinkage

D. Melting point

90. Galvanising (i.e., zinc coating) of steel sheets is done to______________________?
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A. Prevent its rusting by contact with corrosive atmosphere

B. Protect the base metal by cathodic protection

C. Both A. & B.

D. Neither A. nor B.

91. Brass is an alloy of____________________?
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A. Nickel and tin

B. Tin and lead

C. Copper, nickel and zinc

D. Copper and zinc
93. German silver in an alloy of________________?
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A. Copper, aluminium and silver

B. Silver, zinc and aluminium

C. Silver, nickel and zinc

D. Copper, nickel and zinc
94. Hardest materials so far found is_________________?
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A. Diamond

B. Graphite

C. Carborundum

D. Pumice stone

95. Which of the following is not a nickel based alloy ?
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A. Nimonics

B. Babbitt metal

C. Inconel

D. Hastelloys

96. Constantan used in thermocouples is an alloy of___________________?
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A. Copper & aluminium

B. Iron & copper

C. Lead & tin

D. None of these
97. 100% H2SO4 at 30C cant be stored in a vessel made/lined with ___________________?
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A. Aluminium, tin and rubber

B. Cast iron and high silicon iron

C. Teflon, glass and porcelain

D. Mild steel and stainless steel

98. Constantan is an alloy of____________________?
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A. Cu (55%) & Ni (45%)

B. Pt (95%) & Rh (10%)

C. Cu (55%) & Sn (45%)

D. Fe (80%) & Ni (20%)

100. Graphite is a good________________?
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A. Thermal & electrical insulator

B. Conductor of heat

C. Conductor of electricity

D. Both B. & C.