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

chemical engineering materials and construction Mcqs

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

A. Plasticity

B. Ductility

C. Elasticity

D. Creep

102. The carbonating tower used in Solvay process of soda ash manufacture is made of_________________?
0

A. Lead lined steel

B. Cast iron

C. Karbate

D. Stainless steel

103. Hardest material so far found is__________________?
0

A. Graphite

B. Diamond

C. Pumice stone

D. Carborundum

104. Galvanised iron is___________________?
0

A. None of these

B. Protected from rusting

C. Alumina coated iron

D. Harder

105. 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.

106. For platinum thermocouples, lead wires are made of___________________?
0

A. Copper & iron

B. Copper & copper-nickel alloys

C. Iron & nickel

D. Tin & nickel

107. Light weight metallic alloy used in aircraft industry is________________?
0

A. Phosphor bronze

B. Duralumin

C. High silicon (14%) iron

D. Aluminium

108. Sherardizing process is used for__________________?
0

A. Surface coating

B. None of these

C. Cold working on metals

D. Heat treatment of high speed steel

109. Alpha iron is stable ______________ C?
0

A. Above 1800

B. Upto 910

C. Above 1403

D. Between 910 & 1403

110. Iron rust is_________________?
0

A. Ferrous oxide

B. Ferric sulphide

C. Powdered iron

D. Hydrated ferric oxide

111. ____________ alloys have the highest specific strength of all the structural materials out of the following?
0

A. Titanium

B. Magnetic steel

C. Magnesium

D. Chromium

112. _____________ is used for examining the macro-structure of a material?
0

A. Metallurgical microscope

B. Optical microscope

C. Visual inspection by naked eye

D. X-rays

113. Nitriding of steel is done (in electric furnace) at _____________ C?
0

A. 2210

B. 1720

C. 510

D. 910

114. Carbon is present in the uncombined (graphitic) form in case of__________________?
0

A. Steel

B. Cast iron

C. Ferroalloy

D. None of these

115. Thermosetting resins are those polymers, which__________________?
0

A. Allow slip to occur between molecules

B. Do not increase in plasticity with rise in temperature

C. Do not take on a permanent set

D. None of these

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

A. 100 -150

B. 5-Jan

C. 20-30

D. 200 250

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

A. None of these

B. Zinc

C. Nickel

D. Cobalt

118. Materials having _____________ lattice structure are usually most ductile?
0

A. FCC

B. HCP

C. Cubic

D. BCC

119. Most suitable material for high pressure vessel operating at 500 atm. and 500 C is__________________?
0

A. Mild steel

B. Molybdenum stainless steel

C. High silicon iron (14% Si)

D. 18/8 stainless steel

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

A. Ductility

B. Tenacity & hardness

C. Malleability

D. Electrical conductivity

121. Hydrochloric acid absorber in made of___________________?
0

A. Karbate

B. Cast iron

C. Mild steel

D. Stainless steel

122. Acetylene gas holder is made of__________________?
0

A. Cast iron

B. Steel

C. Monel metal

D. Copper

123. 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) ?
0

A. Alumel

B. Constantan

C. Invar

D. Chromel

124. Residual magnetism in steel for magnets is increased by the addition of__________________?
0

A. Tungsten

B. Cobalt

C. Chromium

D. Nickel

125. Monel alloy is____________________?
0

A. Not used in cast and wrought forms

B. Used for making steam valves and turbine blades as it resists steam attack at high temperature

C. Not suitable for making kitchen utensils

D. The costliest of all the alloys of nickel

126. The ability of a material to absorb energy in the elastic range is a measure of its __________________?
0

A. Resilience

B. Malleability

C. Toughness

D. Brittleness

127. 18/8 steel is a/an __________ stainless steel ?
0

A. Martensitic

B. Austenitic

C. Ferritic

D. None of these

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

A. Silicides

B. Oxides

C. Nitrides

D. Carbides

129. Which of the following is not a non-ferrous alloy ?
0

A. Magnalium

B. Meehanite

C. Muntz metal

D. Gun metal

130. Tank furnace used for melting of glass is made of___________________?
0

A. Refractory blocks

B. Stainless steel

C. Cast iron

D. Mild steel

131. SO3 is absorbed using H2SO4 in a____________________?
0

A. Stainless steel plate tower

B. None of these

C. Packed steel tower lined with acid proof bricks

D. Cast iron packed tower

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

A. German silver

B. Tungsten

C. Constantan

D. Nichrome

133. Dead mild steel, which contains 0.10 to 0.15 percent carbon is used for making________________?
0

A. Shear blades

B. Shafts

C. Gears

D. Flanges

134. Specify the material of construction suitable for handling concentrated HNO3 at 100C ?
0

A. Silicone rubber

B. Stainless steel

C. Tin and wood

D. High silicon iron, Kel-F and Teflon

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

A. Dilute H2SO4

B. Hydrofluoric acid

C. Dilute HCl

D. Dilute HNO3

136. Phenol is not shipped in________________?
0

A. Galvanised or tin lined drums

B. Nickel lined steel tank cars

C. Cast iron containers

D. Boxed glass carboys

137. Which of the following pairs of elements may form an alloy ?
0

A. None of these

B. Iron & carbon

C. Platinum & mercury

D. Iron & mercury

138. Electronic structure of a material is generally studied by__________________?
0

A. Electron diffraction

B. Metallurgical microscope

C. Spectroscopic techniques

D. X-ray

139. Graphite is corroded by_________________?
0

A. None of these

B. Sulphuric acid (10%)

C. Sea water

D. Hydrochloric acid

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

A. Gun metal

B. Brass

C. Cast iron

D. Steel

141. Which of the following is not an alloy of tin ?
0

A. Soft solder

B. White-bearing metal

C. German silver

D. Pewter type metal

142. Maximum consumption of zinc is in____________________?
0

A. Galvanising

B. Electrical industry

C. Alloying

D. Utensil manufacture

143. _____________ is added in stainless steel to prevent inter crystal corrosion?
0

A. Nickel

B. Niobium

C. Chromium

D. Vanadium

144. Which of the following exercises most powerful influence on the mechanical properties of steel ?
0

A. Phosphorous

B. Carbon

C. Manganese

D. Silicon

145. White metal is an alloy of___________________?
0

A. Copper and lead

B. Lead, tin and cadmium

C. Copper, tin and zinc

D. None of these

146. A material no longer behaves elastically beyond_________________?
0

A. Plastic limit

B. Breaking load

C. Limiting load

D. Elastic limit

147. Aqueous nitric acid is stored in________________?
0

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

B. Steel drum

C. Cast iron vessel

D. Stainless steel vessel

148. A steel alloy containing 36% nickel is called _____________________, which has a zero co-efficient of expansion?
0

A. Heat resisting steel

B. Austenitic stainless steel

C. Invar

D. High speed steel

149. Fatigue failure of a material results from _____________ stress?
0

A. None of these

B. Tensile

C. Compressive

D. Fluctuating

150. Shock resisting steels should possess high___________________?
0

A. Wear resistance

B. Hardness

C. Tensile strength

D. Toughness

Previous Next

Showing 101 to 150 of 497 mcqs

civil engineering

hrm

economics

agriculture

political science

statistics

english

electrical engineering

judiciary and law

computer

chemical engineering/chemical engineering basics

mechanical engineering

english literature

pak study

software engineering

mathematics

chemical engineering/process equipment and plant design

chemical engineering/mass transfer

medical

chemistry

chemical engineering/polymer technology

pakistan current affairs

chemical engineering/heat transfer chemical engineering

chemical engineering/chemical reaction

islamic studies

general knowledge

sociology

world current affairs

psychology

biology

chemical engineering/chemical environmental engineering chemical engineering

auditing

chemical engineering/process control and instrumentation

physics

chemical engineering/mechanical operations

chemical engineering/stoichiometry

chemical engineering/fertilizer technology

chemical engineering/fuels and combustion

chemical engineering/thermodynamics for chemical chemical engineering

chemical engineering/plant economics

finance

chemical engineering/materials and construction

marketing

chemical engineering/refractory technology

urdu general knowledge

accounting

election officer

chemical engineering/petroleum refinery engineering

everyday science

chemical engineering/nuclear power engineering

chemical engineering/chemical process

chemical engineering/fluid mechanics for chemical chemical engineering

pedagogy

chemical engineering

chemical engineering/furnace technology