chemical engineering MCQs – Page 142

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 Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs

7051. Bronze is an alloy of copper and _________________?
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A. Zinc

B. Tin

C. Nickel

D. Lead

7052. The carbonating tower used in Solvay process of soda ash manufacture is made of_________________?
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A. Stainless steel

B. Cast iron

C. Karbate

D. Lead lined steel

7053. Hardest materials so far found is_________________?
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A. Diamond

B. Pumice stone

C. Carborundum

D. Graphite

7054. Heavy duty bearings are usually made of___________________?
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A. White metal

B. Zinc

C. Phosphorous bronze

D. Monel

7055. Light weight metallic alloy used in aircraft industry is________________?
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A. High silicon (14%) iron

B. Phosphor bronze

C. Aluminium

D. Duralumin

7056. Which of the following is the hardest _______________?
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A. Ferrite

B. Austenite

C. Cementite

D. Pearlite

7057. Photographic plates are coated with_________________?
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A. Calcium silicate

B. Silver nitrate

C. Silver halide

D. Metallic silver

7058. Which of the following is the most elastic material ?
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A. Glass

B. Rubber

C. Steel

D. Plastic

7059. For spinning viscose rayon, the extrusion spinnerettes are made of ___________________?
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A. Platinum or gold alloys

B. High carbon steel

C. Nickel

D. Aluminium

7060. The process of coating steel sheets by zinc to improve its corrosion resistance is called___________________?
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A. Galvanising

B. Tempering

C. Zincification

D. Calorising

7061. Dies for wire drawing are generally made of__________________?
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A. Mild steel

B. Stainless steel

C. High carbon steel

D. Carbides

7062. Phenol is not shipped in________________?
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A. Galvanised or tin lined drums

B. Nickel lined steel tank cars

C. Boxed glass carboys

D. Cast iron containers

7063. Ability of a material to absorb energy in deformation in the plastic range is characterised as its____________________?
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A. Ductility

B. Creep

C. Resilience

D. Toughness

7064. Shock resisting steels should possess high___________________?
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A. Wear resistance

B. Toughness

C. Tensile strength

D. Hardness

7065. Steel rods are used in reinforced concrete to increase its ______________ strength?
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A. Shear

B. Compressive

C. None of these

D. Tensile

7066. Sherardizing process is used for__________________?
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A. Heat treatment of high speed steel

B. None of these

C. Cold working on metals

D. Surface coating

7067. Tempering of steel is done to make it________________?
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A. Hard

B. Rollable

C. Soft

D. Brittle

7068. 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) ?
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A. Alumel

B. Constantan

C. Invar

D. Chromel

7069. Plasticisers are added to polymers to improve their____________________?
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A. Alkali resistance

B. Tensile strength

C. Acid resistance

D. Softness & flexibility

7070. Babbitt metal (used for making bearings) comprises of__________________?
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A. Zinc and aluminium

B. Copper and aluminium

C. Mainly tin (85%) and lead

D. Saw dust and iron dust mixture

7071. Which of the following has the highest compressive strength ?
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A. High carbon steel

B. Wrought iron

C. Cast iron

D. Mild steel

7072. The temperature at which new grains are formed in the metal is called the ______________ temperature?
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A. Eutectic

B. Upper critical

C. Lower critical

D. Recrystallisation

7073. Zircaloy used as a fuel cladding material in a nuclear reactor (thermal) is an alloy of zirconium_______________?
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A. And copper

B. And graphite

C. Tin, nickel, iron and chromium

D. None of these

7074. Ability of a material to ______________ is indicated by its damping capacity?
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A. Absorb vibration

B. Withstand compression

C. Absorb shock

D. None of these

7075. Which of the following is not a non-ferrous alloy ?
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A. Meehanite

B. Gun metal

C. Magnalium

D. Muntz metal

7076. Nickel (76%) and chromium (15%) alloys are termed as______________________?
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A. Brass

B. Inconel

C. Aluminium bronzes

D. Monel

7077. Slow and progressive deformation of a material with time under constant stress is called___________________?
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A. None of these

B. Erosion

C. Resilience

D. Creep

7078. Softness of silver can be converted into hardness by alloying it with small quantity of_________________?
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A. Copper & nickel

B. Aluminium

C. Tin

D. Zinc

7079. The process of heating the cold pressed metallic powder is called ______________ in powder metallurgy?
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A. Sintering

B. Fusion

C. Precipitation

D. Agglomeration

7080. The presence of impurities in iron_________________?
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A. Increases its melting point

B. Decreases its melting point

C. Makes it malleable

D. Does not affect its melting point

7081. Iron rust is_________________?
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A. Ferric sulphide

B. Hydrated ferric oxide

C. Ferrous oxide

D. Powdered iron

7082. A steel alloy containing 36% nickel is called _____________________, which has a zero co-efficient of expansion?
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A. Austenitic stainless steel

B. Invar

C. High speed steel

D. Heat resisting steel

7083. Dilute sulphuric acid is transported in _____________ pipes?
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A. Mild steel

B. Copper

C. Lead

D. Special alloys

7084. A measure of toughness of a material is its________________?
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A. Ultimate strength

B. Percentage elongation

C. Area under stress-strain diagram

D. Yield strength

7085. Metal at the top of the electromotive series is________________?
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A. Most stable

B. Most noble

C. Most active

D. Least active

7086. Fatigue failure of a material results from ______________ stress?
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A. None of these

B. Fluctuating

C. Tensile

D. Compressive

7087. For storing water and acid free benzol, use a ______________ vessel?
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A. Stainless steel

B. Steel

C. None of these

D. Karbate

7088. The main purpose of galvanising iron sheets is to___________________?
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A. Increase its glossiness and lustre

B. Harden the surface

C. Prevent the action of oxygen

D. Prevent the action of water

7089. The behaviour of visco-elastic material is time dependent. This behaviour is common in _____________ materials?
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A. Non-crystalline organic polymeric

B. Crystalline

C. Non-crystalline solid

D. Rubbery

7090. Mercury is transported in metal containers made of________________?
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A. Iron

B. Lead

C. Aluminium

D. Nickel

7091. Which one contains the least percentage of carbon ?
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A. Wrought iron

B. High speed steel

C. Pig iron

D. Cast iron

7092. Rubber lined vessels are corroded by the action of__________________?
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A. Chloroform

B. All A., B. and C.

C. Sulphuric acid (95%)

D. Aqua regia

7093. Nickel and molybdenum are the basic constituents of___________________?
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A. Hastelloy

B. Solder

C. Inconel

D. German silver

7094. Silicon percentage in acid resistant cast iron is about________________?
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A. 14

B. 4

C. 8

D. 20

7095. 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. Concentrated H2SO4

B. Dilute HCI

C. None of these

D. Acetic acid

7096. Generally _____________ are subjected to galvanising (i.e., zinc coating)?
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A. Non-metals

B. Non-ferrous metals

C. Stainless steel

D. Low carbon steels

7097. Plate and frame filter press is usually made of__________________?
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A. Cast iron

B. Stainless steel

C. Mild steel

D. Galvanised iron

7098. Polythene (low or high density) containers are not corroded by___________________?
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A. Nitric acid (95%) at room temperature

B. Sulphuric acid (10%) at room temperature

C. Sulphur trioxide at 60C

D. Any of these

7099. Constantan is an alloy of____________________?
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A. Cu (55%) & Sn (45%)

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

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

D. Cu (55%) & Ni (45%)

7100. Invar used in thermocouples is an alloy of nickel and________________?
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A. Chromium

B. Copper

C. Iron

D. Lead

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