chemical engineering Mcqs
7151. Addition of nickel to copper improves its_________________?
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A. Hardness

B. Strength

C. Machinability

D. Ductility

7152. When the steel is subjected to normalising, its ______________ decreases?
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A. Ultimate tensile strength (UTS)

B. Ductility

C. Yield point

D. None of these

7153. Nickel is a constituent of ________________________?
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A. Monel metal

B. Bronze

C. Duralumin

D. Solder

7154. Cermets are ______________ materials?
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A. Abrasive

B. Refractory

C. Fully metallic

D. Reinforced

7155. A material capable of undergoing large permanent deformation, when subjected to compression is termed as___________________?
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A. Brittle

B. None of these

C. Ductile

D. Malleable
7156. A material no longer behaves elastically beyond_________________?
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A. Limiting load

B. Elastic limit

C. Breaking load

D. Plastic limit

7157. Addition of tungsten to steel imparts___________________?
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A. Corrosion resistance

B. Ductility

C. Cutting hardness

D. Magnetic properties

7158. Materials having _____________ lattice structure are usually most ductile?
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A. FCC

B. Cubic

C. BCC

D. HCP

7159. Lead alone is not used in storing equipment, because it________________?
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A. Corrodes easily

B. Is having low creep strength

C. Is very costly

D. None of these

7160. Metalloid is__________________?
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A. Highly electronegative in nature

B. An element which exhibits the properties of both metal & non-metal

C. An alloy

D. All A., B. and C.

7161. Which is an amorphous material ?
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A. Glass

B. Brass

C. Cast iron

D. Mica

7162. Gas holder of a gobar (cow-dung) gas plant is made of___________________?
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A. Aluminium

B. Molybdenum stainless steel

C. Mild steel

D. Tin

7163. Acid proof stoneware_________________?
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A. All A., B. and C.

B. Has very low strength

C. Is broken by small temperature changes

D. Cannot be heated

7164. Ball bearings are generally made of___________________?
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A. Stainless steel

B. Plain carbon steel

C. Chrome carbon steel

D. Malleable cast iron

7165. An alloy of iron containing 4% carbon is called________________?
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A. None of these

B. High carbon steel

C. Wrought iron

D. Mild steel

7166. Wood metal is not used for making___________________?
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A. Storage tank for storing brine and caustic soda

B. Soft solder

C. Casting for dental work

D. Fusible safety plug for pressure cooker

7167. Nitriding of steel is done (in electric furnace) at _____________ C?
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A. 2210

B. 510

C. 1720

D. 910

7168. 100% H2SO4 at 30C cant be stored in a vessel made/lined with ___________________?
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A. Teflon, glass and porcelain

B. Cast iron and high silicon iron

C. Mild steel and stainless steel

D. Aluminium, tin and rubber
7169. Presence of high amount of silicon in cast iron________________?
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A. Suppresses the decomposition of Fe3C

B. Reduces its fluidity

C. Increases the contraction of the metal

D. Increases the formation of graphite
7170. The loss of strength in compression which occurs, when there is a gain of strength in tension due to over loading is called__________________?
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A. Bauschinger effect

B. Hysteresis

C. Relaxation

D. Hookes effect

7171. Wrought iron is ____________________?
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A. An alloy of iron, chromium & carbon

B. High carbon iron

C. Malleable & ductile; and hence is used for chain links, hooks & couplings

D. Highly resistance to acid corrosion

7172. Trough of an apron conveyor is made of___________________?
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A. Metal

B. Lead lined concrete vessel

C. Either B. or C.

D. Wood

7173. Titanium metal_________________?
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A. Exists in three allotropic forms

B. Cannot be welded

C. Is used in oceanographic and space exploration applications

D. None of these

7174. Austenitic manganese steel used for making jaws of crushing machines contains about ______________ percent manganese?
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A. 3.5-4.5

B. 12-14

C. 9-Jul

D. 1.5-2

7175. The malleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the maximum malleability ?
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A. Aluminium

B. Wrought iron

C. Lead

D. Copper

7176. Concentrated HCl at 30C can be stored in a vessel made of ________________________?
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A. Cast iron and aluminium

B. None of these

C. PTFE and porcelain

D. Stainless steel and high silicon cast iron

7177. _____________ is used for examining the macro-structure of a material?
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A. Optical microscope

B. X-rays

C. Metallurgical microscope

D. Visual inspection by naked eye
7178. Brass is an alloy of____________________?
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A. Copper and zinc

B. Nickel and tin

C. Tin and lead

D. Copper, nickel and zinc

7179. Carbon percentage is the same in cast iron and_________________?
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A. High silicon (14%) iron

B. Pig iron

C. Wrought iron

D. Mild steel

7180. Ammonium chloride solution is stored/ treated in _____________ vessels/pipes?
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A. Stainless steel

B. Lead

C. Rubber or durmet-20 lined

D. Plain carbon steel

7181. Thermometer bulb & capillary in case of mercury filled pressure spring expansion thermometer is normally made of ______________ as mercury does not amalgamate with it?
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A. Copper alloys

B. Monel

C. Stainless steel

D. Copper

7182. Cold work tool steel should have_________________?
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A. Poor hardenability

B. High toughness

C. High wear resistance

D. All A., B. & C.

7183. A hardened steel essentially contains___________________?
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A. Sorbite

B. Martensite

C. Troostite

D. None of these

7184. Spark plugs, ignition tubes and electrodes are made of nickel ____________ alloys?
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A. Manganese

B. Beryllium

C. Copper

D. Iron

7185. Babbitt metal used for making bearings should have_____________________?
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A. High co-efficient of friction between journal and bearing

B. Ability to retain lubricant on its surface

C. Low co-efficient of friction between journal and bearing

D. Both B. & C.

7186. Liners of a ball mill are never made of__________________?
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A. Cast iron

B. Alloy steel

C. Lead

D. Rubber or ceramic material

7187. Fatigue failure of a material results from _____________ stress?
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A. Fluctuating

B. Tensile

C. Compressive

D. None of these

7188. _____________ is added in low carbon steel to raise its yield point?
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A. Sulphur

B. Manganese

C. Phosphorous

D. Silicon

7189. Hydrocyanic acid is not shipped in______________?
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A. Steel cylinders

B. Cast iron vessels

C. Aluminium containers

D. Monel drums

7190. Age hardening is concerned with_________________?
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A. Duralumin

B. Brass

C. Silver

D. Copper

7191. Diamagnetic materials are magnetised________________?
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A. In a direction opposite to that of the applied field

B. With eddy currents only

C. Only slightly

D. Strongly

7192. Clock pendulums are usually made of _______________ steel?
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A. Heat resisting

B. None of these

C. Stainless

D. High speed

7193. Tubes of multiple effect evaporator used for concentration of sugar cane juice are made of __________________?
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A. Stainless steel

B. Nickel

C. Brass

D. Copper
7194. Which of the following is the softest material ?
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A. Fluorite

B. Corundum

C. Calcite

D. Quartz

7195. Thermosetting resins are those polymers, which__________________?
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A. Do not increase in plasticity with rise in temperature

B. None of these

C. Allow slip to occur between molecules

D. Do not take on a permanent set

7196. A material capable of undergoing large permanent deformation, when subjected to tension is termed as___________________?
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A. Friable

B. Ductile

C. None of these

D. Brittle

7197. Purity of electrical grade aluminium should be ? _____________ percent?
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A. 85

B. 90

C. 95

D. 99.5
7198. The digester of a Gobar gas plant is a___________________?
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A. Stainless steel vessel

B. Mild steel drum

C. Masonry well

D. Cast iron vessel

7199. For platinum thermocouples, lead wires are made of___________________?
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A. Tin & nickel

B. Copper & iron

C. Iron & nickel

D. Copper & copper-nickel alloys
7200. Low carbon steels are those in which carbon percentage is around____________________?
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A. 0.8 to 1.5

B. 1.5 to 2

C. 0.1 to 0.35

D. 0.4 to 0.7