All Free Chemical Engineering MCQs with Answers
Every Chemical Engineering question in the bank, across all chapters, each with the correct answer and a written explanation. Free and unlimited, with no account needed.
6,983 questions · page 305 of 350
- A. Duriron
- B. Karbate
- C. Aluminium
- D. Nickel
Explanation: Nickel has excellent resistance to alkaline corrosion, particularly in caustic soda service.
Correct answer: Nickel- A. Cast iron
- B. Mild steel
- C. Stainless steel
- D. Galvanised iron
Explanation: Traditional plate-and-frame filter presses use cast-iron plates and frames because cast iron is rigid, strong, and economical.
Correct answer: Cast iron- A. Monel metal
- B. Solder
- C. Duralumin
- D. Bronze
Explanation: Monel is a copper-nickel alloy containing a high proportion of nickel, commonly about 60–70% nickel.
Correct answer: Monel metal- A. Caustic soda solution
- B. None of these
- C. Sulphuric acid (10%)
- D. Phosphoric acid
Explanation: Platinum is highly resistant to these dilute acids, while silver is not significantly attacked by 10% sulphuric acid under ordinary…
Correct answer: None of these- A. Soft solder
- B. Casting for dental work
- C. Storage tank for storing brine and caustic soda
- D. Fusible safety plug for pressure cooker
Explanation: Wood's metal is a low-melting fusible alloy used in soft soldering, dental casting, and safety plugs.
Correct answer: Storage tank for storing brine and caustic soda- A. Inconel
- B. Monel
- C. Aluminium bronzes
- D. Brass
Explanation: An alloy containing approximately 76% nickel and 15% chromium corresponds to Inconel, a nickel-chromium alloy valued for high-temperature…
Correct answer: Inconel- A. Tin base alloy
- B. Pure metal
- C. Lead base alloy
- D. White metal
Explanation: Babbitt is a soft antifriction alloy, usually based on tin or lead, and is also called white metal. It is therefore not a pure metal.
Correct answer: Pure metal- A. Silver nitrate
- B. Calcium silicate
- C. Silver halide
- D. Metallic silver
Explanation: Photographic plates use a light-sensitive coating of silver halide, commonly silver bromide dispersed in gelatin.
Correct answer: Silver halide- A. Ductility
- B. Malleability
- C. Electrical conductivity
- D. Tenacity & hardness
Explanation: A small arsenic addition strengthens copper by increasing its hardness and tensile strength, described here as greater tenacity.
Correct answer: Tenacity & hardness- A. Steel
- B. Cast iron
- C. Copper
- D. Monel metal
Explanation: Acetylene gas holders are normally fabricated from steel because steel provides the required strength and is practical for large welded…
Correct answer: Steel- A. Short of antifrictional properties
- B. Tin or lead based alloys
- C. Having homogenous microstructure
- D. Yellow metals
Explanation: Babbitt bearing metals are soft tin-based or lead-based alloys designed to provide antifriction properties and embed small contaminant…
Correct answer: Tin or lead based alloys- A. Wrought iron
- B. Mild steel
- C. Pig iron
- D. High silicon (14%) iron
Explanation: Pig iron and cast iron both contain a high carbon percentage, generally around 2 to 4% or more, unlike steel, which contains less than…
Correct answer: Pig iron- A. Hastelloy C
- B. Monel
- C. Inconel
- D. Bronzes
Explanation: Hastelloy C is a nickel-based corrosion-resistant alloy containing substantial molybdenum, with typical compositions close to 56% nickel…
Correct answer: Hastelloy C- A. Tin and wood
- B. High silicon iron, Kel-F and Teflon
- C. Silicone rubber
- D. Stainless steel
Explanation: Concentrated nitric acid at high temperature is strongly oxidising, so high-silicon iron and fluoropolymers such as Kel-F and Teflon are…
Correct answer: High silicon iron, Kel-F and Teflon6095. Which of the following alloy steels is the most suitable for making gun barrels and projectiles ?
- A. Tungsten steel
- B. Molybdenum steel
- C. Nickel-chrome steel
- D. Cobalt steel
Explanation: Nickel-chrome steel combines high strength, toughness and hardenability, making it suitable for gun barrels and projectiles.
Correct answer: Nickel-chrome steel- A. Ferromagnetic above its curie point (i.e., 415°C)
- B. Having h.c.p. crystal lattice
- C. Not resistant to oxidation at high temperature
- D. Ferromagnetic at room temperature
Explanation: Nickel is ferromagnetic at room temperature and loses ferromagnetism above its Curie temperature of approximately 358°C, not 415°C.
Correct answer: Ferromagnetic at room temperature- A. None of these
- B. Copper, tin and zinc
- C. Copper and lead
- D. Lead, tin and cadmium
Explanation: White metal is a broad term for bearing alloys, commonly based on lead or tin with additions such as antimony, copper or other elements.
Correct answer: None of these- A. Silver
- B. Copper
- C. Zinc
- D. Nickel
Explanation: German silver is a copper-nickel-zinc alloy and contains no actual silver.
Correct answer: Copper- A. Cutting tools
- B. Both A. & B.
- C. Abrasives
- D. Neither A. nor B
Explanation: Cermets combine ceramic hardness and heat resistance with metallic toughness, so they are used in cutting tools and certain abrasive or…
Correct answer: Both A. & B.- A. Vanadium
- B. Nickel
- C. Chromium
- D. Niobium
Explanation: Niobium stabilizes stainless steel by forming stable niobium carbides, preventing chromium carbide formation at grain boundaries and…
Correct answer: Niobium