chemical engineering mcqs to prepare for nts, kppsc, fpsc, ppsc and more

chemical engineering Mcqs

7101. Chlorination of benzene is done to produce benzene hexachloride (a pesticide) in a photochemical reactor lined with_____________________?
0

A. Fireclay bricks

B. Karbate

C. PVC

D. Lead or glass

7102. Spray dryer for evaporating milk to produce milk powder is made of_________________?
0

A. Cast iron

B. Aluminium

C. Lead lined steel

D. Stainless steel

7103. Presence of even 0.005% of _____________ in copper makes it highly brittle, rendering it useless for wire-drawing?
0

A. Bismuth

B. Arsenic

C. Antimony

D. Oxygen

7104. In the Kraft (sulphate) process for the paper manufacture, the digestor is made of________________?
0

A. Cast iron

B. Stainless steel

C. Karbate carbon

D. Wrought iron

7105. Valves in pipe size of 2? and under are normally made of_______________________?
0

A. Bronze

B. Wrought iron

C. Monel

D. Brass

7106. With increase in carbide/graphite ratio in cast iron, its__________________?
0

A. Hardness & brittleness increases

B. Ductility decreases

C. Both A. and B.

D. Neither A. nor B.

7107. Brinell Hardness Number (BHN) for talc is approximately in the range of____________________?
0

A. 200 250

B. 100 -150

C. 5-Jan

D. 20-30

7108. The material used in the filament of electric bulbs is_________________?
0

A. German silver

B. Tungsten

C. Nichrome

D. Constantan

7109. _______________ does not contain tin as an alloying material?
0

A. Pewter

B. Brass

C. Solder

D. Babbitt metal

7110. Caustic soda can be stored in _____________ drums?
0

A. Steel

B. Brass

C. Cast iron

D. Gun metal

7111. Teflon (PTFE) is corroded by_______________?
0

A. Hydrochloric acid (95%)

B. Sulphuric acid

C. None of these

D. Hydrochloric acid (10%)

7112. Presence of 0.3 to 0.5% arsenic in copper increases its____________________?
0

A. Ductility

B. Tenacity & hardness

C. Malleability

D. Electrical conductivity

7113. Which of the following is not used as the ceramic material in cermets??
0

A. Nitrides

B. Carbides

C. Oxides

D. Silicides

7114. Which of the following is the lightest of engineering metals ?
0

A. Aluminium

B. Titanium

C. Magnesium

D. Tin

7115. An alloy used as thermocouple material comprises of 40% nickel and 60% copper. It is called____________________?
0

A. Kanthal

B. Constantan

C. German silver

D. Chromel

7116. To improve the machinability of steel, it is generally subjected to_______________?
0

A. Tempering

B. Annealing

C. Normalising

D. Spheroidising

7117. Acetaldehyde is shipped in ____________ drums?
0

A. Aluminium

B. Cast iron

C. Either B. & C.

D. Steel

7118. Which of the following is a non-magnetic material ?
0

A. Cobalt

B. Zinc

C. None of these

D. Nickel

7119. Chromel (Nichrome) is an alloy of_____________________?
0

A. Chromium and molybdenum

B. Molybdenum and nickel

C. Nickel and chromium

D. Chromium and aluminium

7120. Hardest material so far found is__________________?
0

A. Pumice stone

B. Diamond

C. Graphite

D. Carborundum

7121. Out of the following, copper vessels are the most suitable for the storage of__________________?
0

A. Phosphoric acid (95%) & sulphuric acid (95% and fuming)

B. Dry chlorine & dry fluorine

C. Bromine

D. Nitric acid (95% and fuming)

7122. Copper is dissolved from its ore by H2SO4 in a percolation tank made of_________________?
0

A. Wood

B. High silicon iron (14% Si)

C. Reinforced concrete lined with lead

D. Stainless steel

7123. Acetaldehyde is produced by hydration of acetylene in a sulphuric acid solution of mercuric sulphate. Hydration tower is made of___________________?
0

A. Rubber lined mild steel

B. Cast iron

C. Aluminium

D. Lead lined mild steel

7124. Glass lined vessels are not used for handling/storing__________________?
0

A. Dilute HCl

B. Dilute H2SO4

C. Hydrofluoric acid

D. Dilute HNO3

7125. Galvanised iron is___________________?
0

A. None of these

B. Harder

C. Protected from rusting

D. Alumina coated iron

7126. Maximum consumption of copper is in__________________?
0

A. Small scale industries

B. Industrial equipment manufacture

C. Electrical industry

D. Utensil manufacture

7127. The heat treatment process applied to cold formed steel parts is ____________________?
0

A. Artificial ageing

B. Tempering

C. Normalising

D. Solution annealing

7128. A material is called ductile, if it can be__________________?
0

A. Made lustrous by heating it

B. Drawn into wires

C. Hammered to a thin sheet

D. Fractured without deformation

7129. White metal is an alloy of___________________?
0

A. Lead, tin and cadmium

B. Copper and lead

C. Copper, tin and zinc

D. None of these

7130. Addition of ______________ in steel is helpful in increasing the depth of hardness?
0

A. Tungsten

B. Chromium

C. Sulphur

D. Vanadium

7131. Acetylene gas holder is made of__________________?
0

A. Cast iron

B. Steel

C. Monel metal

D. Copper

7132. Addition of ______________ to the steel helps in increasing the residual magnetism in steel used for making magnets?
0

A. Tungsten

B. Cobalt

C. Chromium

D. Nickel

7133. Percentage of silver in German silver is__________________?
0

A. 0

B. 5

C. 20

D. 10

7134. Rotary driers are generally made of_______________?
0

A. Cast iron

B. Tin lined with refractory bricks

C. Mild steel

D. High silicon iron (14% Si)

7135. In the Kraft process of sulphate paper pulp manufacture, the black liquor and the white liquor storage tank is made of _______________?
0

A. Porcelain

B. Steel

C. Wood

D. Concrete

7136. The ability of a material to offer resistance to scratching or indentation is a measure of its_________________?
0

A. Toughness

B. Hardness

C. Resilience

D. Brittleness

7137. The phenomenon in which slow extension of material takes place with the time at constant load is called________________?
0

A. Creep

B. Ductility

C. Elasticity

D. Plasticity

7138. Addition of 2% nickel in steel makes it suitable for making ___________________?
0

A. Connecting rod

B. Electronic valves

C. Boiler plates, rivets etc.

D. Turbine blades

7139. Mild steel is ___________________?
0

A. A low carbon steel (0.05 to 0.3% carbon)

B. A high carbon steel (0.5 to 1.5% carbon)

C. Highly resistant to corrosion (as much as stainless steel)

D. Very poor in strength & ductility

7140. Cast iron is a ______________ material?
0

A. Tough

B. Brittle

C. Ductile

D. Malleable

7141. Hydrochloric acid absorber in made of___________________?
0

A. Cast iron

B. Stainless steel

C. Karbate

D. Mild steel

7142. Graphite is a good________________?
0

A. Thermal & electrical insulator

B. Conductor of heat

C. Conductor of electricity

D. Both B. & C.

7143. Aqueous nitric acid is stored in________________?
0

A. Cast iron vessel

B. Stainless steel vessel

C. Steel drum

D. Cast iron vessel lined with acid-proof masonry brick

7144. For handling sulphuric acid of 95% strength, the suitable material of construction for pipes is__________________?
0

A. Cast iron

B. Stainless steel

C. Nickel

D. Aluminium

7145. Babbitt metal used for bearings is a ____________base alloy?
0

A. Copper

B. Aluminium

C. Tin

D. Lead

7146. Balls in a ball mill are usually made of__________________?
0

A. Steel

B. Bronze

C. Stainless steel

D. Cast iron

7147. The metals occuring at the lower most position in the electromotive series____________________?
0

A. Do not resist corrosion

B. Resist corrosion very strongly

C. Are heat insulators

D. Are very brittle

7148. Corrosion involves exchange of electrons in ____________ corrosion?
0

A. Chemical

B. Electrochemical

C. Both A. & B.

D. Neither A. nor B.

7149. Reactor used in the production of polyvinyl chloride (PVC) is made of____________________?
0

A. Tantalum

B. Aluminium

C. Lead

D. Nickel or glass lined steel

7150. Presence of manganese in alloy steel improves its___________________?
0

A. Corrosion resistance

B. Abrasion resistance & toughness

C. Cutting ability

D. Elasticity & creep resistance

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