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