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.
Last updated
803 questions · page 7 of 41
- A. Magnetic steel
- B. Magnesium
- C. Chromium
- D. Titanium
Explanation: Titanium alloys combine low density with high strength, giving them an exceptionally high strength-to-weight ratio.
Correct answer: Titanium- A. Toughness
- B. Hardness
- C. Tensile strength
- D. Wear resistance
Explanation: Shock loading involves sudden absorption of energy, so shock-resisting steels require high toughness.
Correct answer: Toughness123. Out of the following, copper vessels are the most suitable for the storage of__________________?
- A. Bromine
- B. Dry chlorine & dry fluorine
- C. Nitric acid (95% and fuming)
- D. Phosphoric acid (95%) & sulphuric acid (95% and fuming)
Explanation: Copper is suitable for dry chlorine and dry fluorine because the absence of moisture greatly reduces their corrosive attack and protective…
Correct answer: Dry chlorine & dry fluorine- A. Exists in three allotropic forms
- B. Cannot be welded
- C. Is used in oceanographic and space exploration applications
- D. None of these
Explanation: Titanium is used where high strength, corrosion resistance and low density are valuable, including oceanographic equipment and spacecraft.
Correct answer: Is used in oceanographic and space exploration applications- A. Sulphuric acid (10%)
- B. Sea water
- C. None of these
- D. Hydrochloric acid
Explanation: Graphite is highly resistant to dilute sulphuric acid, hydrochloric acid and seawater under ordinary conditions.
Correct answer: None of these- A. Rubber
- B. Acrylics
- C. Plastics
- D. Lead
Explanation: Lead can undergo creep even at room temperature because its melting point is relatively low, whereas creep in many engineering materials…
Correct answer: Lead127. Which of the following exercises most powerful influence on the mechanical properties of steel ?
- A. Carbon
- B. Manganese
- C. Phosphorous
- D. Silicon
Explanation: Carbon has the strongest overall influence on steel hardness, strength, ductility and weldability because it changes the phases and…
Correct answer: Carbon- A. Saw dust and iron dust mixture
- B. Mainly tin (85%) and lead
- C. Zinc and aluminium
- D. Copper and aluminium
Explanation: Tin-based Babbitt metal commonly contains about 80 to 90% tin, with lead and smaller additions such as antimony and copper.
Correct answer: Mainly tin (85%) and lead- A. Aluminium
- B. High silicon (14%) iron
- C. Duralumin
- D. Phosphor bronze
Explanation: Duralumin is a lightweight aluminium-copper alloy with good strength, making it suitable for aircraft structures.
Correct answer: Duralumin- A. Pig iron
- B. High speed steel
- C. Cast iron
- D. Wrought iron
Explanation: Wrought iron contains very little carbon, typically below about 0.1%, while high-speed steel, cast iron and pig iron contain substantially…
Correct answer: Wrought iron- A. Organic in nature
- B. Stronger in compression than in tension
- C. Always amorphous in nature
- D. Always bad heat conductors
Explanation: Ceramics generally withstand compressive loads well but are weak in tension because cracks propagate readily under tensile stress.
Correct answer: Stronger in compression than in tension- A. Used in very high temperature applications
- B. Not suitable for drainage pipe manufacture
- C. Non-biodegradable
- D. All A., B. & C.
Explanation: Most conventional plastics resist biological decomposition, making them effectively non-biodegradable in ordinary environmental…
Correct answer: Non-biodegradable- A. 510
- B. 1720
- C. 2210
- D. 910
Explanation: Gas nitriding is normally conducted at about 500–550°C, so 510°C is the suitable value.
Correct answer: 510- A. Martensite
- B. Troostite
- C. Sorbite
- D. None of these
Explanation: Rapid quenching of high-carbon steel produces martensite, a very hard supersaturated structure.
Correct answer: Martensite- A. Sulphuric acid (10%)
- B. Both B. and C.
- C. Ether
- D. Sulphuric acid (95%)
Explanation: Silicone rubber withstands dilute sulphuric acid reasonably well, but concentrated 95% acid and ether can attack or swell it.
Correct answer: Both B. and C.- A. Glass
- B. High silicon cast iron
- C. Glass lined steel
- D. Porcelain
Explanation: Penicillin fermentation requires a sterile, corrosion-resistant vessel that can withstand repeated steam sterilisation, making glass-lined…
Correct answer: Glass lined steel- A. Normalising
- B. Tempering
- C. Artificial ageing
- D. Solution annealing
Explanation: Cold forming introduces work hardening and residual stresses into steel, and solution annealing removes these effects while restoring a…
Correct answer: Solution annealing- A. Monel
- B. High silicon cast iron
- C. Karbate
- D. None of these
Explanation: Monel, a nickel-copper alloy, has excellent resistance to concentrated alkaline solutions such as 50% caustic soda.
Correct answer: Monel- A. Hydrochloric acid (10%)
- B. Sulphuric acid (10%)
- C. Nitric acid (10%)
- D. Saturated brine
Explanation: Stainless steel is strongly resistant to oxidising nitric acid because its chromium-rich passive film is maintained in that environment.
Correct answer: Nitric acid (10%)- A. Electronic valves
- B. Connecting rod
- C. Turbine blades
- D. Boiler plates, rivets etc.
Explanation: Low-nickel steel has improved strength, toughness and resistance to atmospheric corrosion, making it suitable for boiler plates, rivets…
Correct answer: Boiler plates, rivets etc.