chemical engineering materials and construction Mcqs
151. Cast iron has very high___________________?
comments icon0

A. Shock resistance

B. Ductility

C. Resistance to brittleness

D. Compressive strength
152. DDT is shipped in_________________?
comments icon0

A. Fibre drums

B. Stainless steel containers

C. Either B. or C.

D. Paper bags

153. Chromel (Nichrome) is an alloy of_____________________?
comments icon0

A. Molybdenum and nickel

B. Nickel and chromium

C. Chromium and aluminium

D. Chromium and molybdenum

154. Duralumin is an alloy of_________________?
comments icon0

A. Aluminium, nickel and silicon

B. Aluminium, copper and manganese

C. Aluminium and nickel

D. None of these

155. The presence of impurities in iron_________________?
comments icon0
A. Decreases its melting point

B. Makes it malleable

C. Does not affect its melting point

D. Increases its melting point

156. Refined acetic acid storage vessel are made of___________________?
comments icon0

A. Nickel

B. High carbon steel

C. Aluminium

D. Copper

157. Which is an amorphous material ?
comments icon0

A. Mica

B. Cast iron

C. Brass

D. Glass
158. Which one contains the least percentage of carbon ?
comments icon0
A. Wrought iron

B. High speed steel

C. Pig iron

D. Cast iron

159. Fatigue failure of a material results from ______________ stress?
comments icon0

A. Compressive

B. Fluctuating

C. Tensile

D. None of these

160. The behaviour of visco-elastic material is time dependent. This behaviour is common in _____________ materials?
comments icon0

A. Rubbery

B. Crystalline

C. Non-crystalline organic polymeric

D. Non-crystalline solid

162. Which of the following is not an alloy of nickel and chromium ?
comments icon0
A. Duralumin

B. Nimonic alloys

C. Hastelloy

D. Inconel

163. Cold work tool steel should have_________________?
comments icon0

A. High toughness

B. High wear resistance

C. Poor hardenability

D. All A., B. & C.

164. Liquid ammonia is shipped in _____________ containers?
comments icon0

A. Lead lined

B. Glass

C. Steel

D. Aluminium

165. Wood metal is not used for making___________________?
comments icon0

A. Soft solder

B. Storage tank for storing brine and caustic soda

C. Fusible safety plug for pressure cooker

D. Casting for dental work

167. When the steel is subjected to normalising, its ______________ decreases?
comments icon0

A. Yield point

B. Ultimate tensile strength (UTS)

C. Ductility

D. None of these

168. Ceramic materials are____________________?
comments icon0

A. Organic in nature

B. Stronger in compression than in tension

C. Always amorphous in nature

D. Always bad heat conductors

169. Sulphur melting pit in the sulphuric acid plant is made of__________________?
comments icon0
A. Steel or cement-brick lined

B. Cast iron

C. Hard wood

D. Lead lined stainless steel

170. A bearing metal should not have___________________?
comments icon0

A. Low co-efficient of friction

B. Low thermal conductivity

C. Enough plasticity

D. High toughness

172. Dilute sulphuric acid is transported in _____________ pipes?
comments icon0

A. Copper

B. Lead

C. Mild steel

D. Special alloys

173. Atmospheric corrosion of metals result from their________________?
comments icon0

A. Fast hydration

B. Slow dehydration

C. Fast oxidation

D. Slow oxidation
174. Water gas generator is made of__________________?
comments icon0
A. Carbon steel-brick lined

B. High carbon steel-porcelain lined

C. Stainless steel-lead lined

D. Cast iron

176. Diamagnetic materials are magnetised________________?
comments icon0

A. With eddy currents only

B. In a direction opposite to that of the applied field

C. Only slightly

D. Strongly

179. Gunmetal and bronze are not corroded by the action of__________________?
comments icon0

A. Nitric acid (< 25%)

B. Hydrochloric acid (10%)

C. Wet chlorine

D. Synthetic detergent solution
181. H2SO4 (< 50% concentration) is corrosive to_________________?
comments icon0

A. Rubber (butyl and hard), silicone rubber & Teflon

B. Glass, graphite, porcelain & stoneware

C. Aluminium, mild steel, stainless steel, concrete & tin

D. Copper, cast iron & high silicon iron (14% Si)

182. The digester of a Gobar gas plant is a___________________?
comments icon0

A. Cast iron vessel

B. Masonry well

C. Mild steel drum

D. Stainless steel vessel

183. Glass lined vessels are not used for handling__________________?
comments icon0

A. Dilute HNO3

B. Dilute HCI

C. Hydrofluoric acid

D. Dilute H2SO4

185. Which of the following alloys does not contain nickel ?
comments icon0
A. Babbitt metal

B. Inconel

C. Monel

D. Chloro, et-2 alloy

186. Platinum and silver are corroded by___________________?
comments icon0

A. Phosphoric acid

B. Sulphuric acid (10%)

C. None of these

D. Caustic soda solution

188. Copper has very low________________?
comments icon0

A. Ductility

B. Tensile strength

C. Thermal & electrical conductivity

D. Malleability

190. Silicone rubber is not resistant to the corrosive action of____________________?
comments icon0

A. Sulphuric acid (10%)

B. Sulphuric acid (95%)

C. Ether

D. Both B. and C.
192. Babbitt metal (used for making bearings) comprises of__________________?
comments icon0
A. Mainly tin (85%) and lead

B. Saw dust and iron dust mixture

C. Copper and aluminium

D. Zinc and aluminium

194. Pure nickel is___________________?
comments icon0
A. Ferromagnetic at room temperature

B. Having h.c.p. crystal lattice

C. Not resistant to oxidation at high temperature

D. Ferromagnetic above its curie point (i.e., 415C)

195. Hydrochloric acid is stored in a _____________ steel vessel?
comments icon0

A. Glass lined

B. Lead lined

C. Rubber lined

D. Stainless

196. Soap kettle used in the production of laundry soap is made of____________________?
comments icon0
A. Steel with top section nickel clad or stainless steel

B. Concrete

C. Nickel

D. Cast iron

198. Vessels made of _____________ can be used to store dry chlorine?
comments icon0

A. Nickel

B. Thermoplastic materials

C. Steel or iron

D. None of these

199. Kel-F is a material, which is________________?
comments icon0

A. Chemically known as Polychlorotrifluoroethylene (PTFE)

B. Having excellent chemical & high temperature resistance (upto 200C)

C. All A., B. and C.

D. Having elastomeric properties

200. Ammonium chloride solution is stored/ treated in _____________ vessels/pipes?
comments icon0

A. Plain carbon steel

B. Lead

C. Stainless steel

D. Rubber or durmet-20 lined