Free Plant Design and Economics MCQs with Answers
803 Plant Design and Economics MCQs from Chemical Engineering, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
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803 questions · page 14 of 41
- A. Steel
- B. Wood
- C. Concrete
- D. Porcelain
Explanation: Steel tanks are commonly used for Kraft-process black and white liquors because they provide the required mechanical strength and can be…
Correct answer: Steel- A. Ferromagnetic
- B. Paramagnetic
- C. Diamagnetic
- D. None of these
Explanation: Above the Curie temperature, thermal agitation destroys the long-range alignment responsible for ferromagnetism.
Correct answer: Paramagnetic- A. Stainless steel
- B. Aluminium
- C. Cast iron
- D. Nickel
Explanation: Cast iron is widely used for concentrated sulphuric acid because the acid promotes a protective surface film under these conditions.
Correct answer: Cast iron- A. Silica
- B. Tar-dolomite
- C. Low thermal conductivity
- D. Fire clay
Explanation: Silica bricks line coke ovens because they withstand the high operating temperature and have good refractoriness with low chemical…
Correct answer: Silica- A. Normalising
- B. Tempering
- C. Annealing
- D. Carburising
Explanation: Tempering reheats hardened steel below its critical temperature, reducing brittleness and hardness while retaining useful strength.
Correct answer: Tempering- A. High silicon iron (14% Si)
- B. Mild steel
- C. Molybdenum stainless steel
- D. Copper
Explanation: The calorimeter bomb must withstand high oxygen pressure and resist attack by hot combustion products, so it is made from…
Correct answer: Molybdenum stainless steel- A. Normalising
- B. Carburising
- C. Annealing
- D. Tempering
Explanation: Tempering softens hardened steel by controlled reheating, relieving internal stresses and reducing brittleness.
Correct answer: Tempering- A. Universal testing machine
- B. Hydraulic press
- C. Mechanical press
- D. None of these
Explanation: A universal testing machine applies controlled tensile loading and records the load-extension behavior, allowing tensile strength to be…
Correct answer: Universal testing machine- A. Steel
- B. Karbate
- C. Stainless steel
- D. None of these
Explanation: Water and acid-free benzol can be stored in ordinary steel because the absence of acid greatly reduces corrosion risk.
Correct answer: Steel- A. Molybdenum stainless steel
- B. Mild steel
- C. Tin
- D. Aluminium
Explanation: The gas holder of a gobar-gas plant is commonly fabricated from mild steel because it is economical, weldable, and sufficiently strong for…
Correct answer: Mild steel- A. Wood
- B. Stainless steel
- C. High silicon iron (14% Si)
- D. Reinforced concrete lined with lead
Explanation: Sulfuric-acid leaching requires protection against acid attack, so the reinforced-concrete tank is lined with lead.
Correct answer: Reinforced concrete lined with lead- A. Chromium
- B. Sulphur
- C. Vanadium
- D. Tungsten
Explanation: Chromium increases hardenability, allowing hardness to penetrate farther from the quenched surface into the steel.
Correct answer: Chromium- A. Machinability
- B. Hardness
- C. Strength
- D. Ductility
Explanation: Nickel strengthens the copper lattice and increases resistance to deformation, so copper-nickel alloys are harder than pure copper.
Correct answer: Hardness- A. High speed
- B. Stainless
- C. None of these
- D. Heat resisting
Explanation: Clock pendulums are normally made from Invar, a nickel-iron alloy with an exceptionally small coefficient of thermal expansion.
Correct answer: None of these- A. Cast iron
- B. Wrought iron
- C. Karbate
- D. Stainless steel or glass lined vessel
Explanation: SBR polymerisation reactors commonly use stainless steel or glass-lined construction because these materials resist corrosion and…
Correct answer: Stainless steel or glass lined vessel- A. Pewter
- B. Brass
- C. Solder
- D. Babbitt metal
Explanation: Brass is primarily an alloy of copper and zinc and normally contains no tin.
Correct answer: Brass- A. Tough
- B. Ductile
- C. Brittle
- D. Malleable
Explanation: Cast iron contains relatively high carbon and has graphite or carbide phases that promote fracture rather than plastic deformation.
Correct answer: Brittle- A. Oxygen
- B. Arsenic
- C. Antimony
- D. Bismuth
Explanation: Even a very small amount of bismuth segregates at grain boundaries in copper and causes severe hot and cold brittleness, making…
Correct answer: Bismuth- A. Manganese
- B. Phosphorous
- C. Silicon
- D. Sulphur
Explanation: Manganese strengthens low-carbon steel and raises its yield point, while also combining with sulphur to reduce harmful iron sulphide…
Correct answer: Manganese- A. Copper
- B. Duralumin
- C. Brass
- D. Silver
Explanation: Duralumin is an aluminium-copper alloy that gains strength through precipitation or age hardening after solution treatment and controlled…
Correct answer: Duralumin