Materials and Construction Questions

Metallurgy — understanding cementite Cementite in ferrous alloys is best described by which of the following statements?

Materials selection — storing refined (glacial) acetic acid Storage vessels for refined (glacial) acetic acid are commonly fabricated from which material to ensure corrosion resistance and product integrity?

Metallurgy — crystal structure of austenitic stainless steels Austenitic stainless steels are characterized by which crystal structure at room temperature?

Advanced materials — what are cermets? Cermets are best classified as which type of engineering materials?

Chlor-alkali (mercury-cell) electrolysis — electrode materials In a mercury-cell process for caustic soda (NaOH) production, the anode and cathode are made respectively of which materials?

Mechanical behavior — material with highest malleability (from given set) Malleability is the ability of a material to be hammered or rolled into thin sheets. Which of the following exhibits the highest malleability among the listed options?

Materials engineering – Tensile test metric: In a standard tensile test, the “percentage elongation” reported after fracture primarily serves as a measure of which mechanical property of the material?

Metallurgy application – Selecting steels for impact and rail service: Hammers and railway rails are commonly manufactured from which class of carbon steel, balancing strength and toughness for heavy service?

Ironmaking fundamentals – Composition of pig iron: The impure iron (pig iron) tapped from a blast furnace typically contains approximately what percentage of carbon by mass?

Applications of zinc – Identify where zinc is not typically used: Zinc has multiple industrial uses. Which of the following is NOT a common application area for zinc or its compounds?

Refractories in coke oven practice: Coke oven regenerators (the checker brickwork used for heat recovery) are predominantly constructed using which type of refractory brick?

Time-dependent mechanical response – Viscoelasticity: Visco-elastic behavior (combination of viscous flow and elastic deformation) is most commonly associated with which class of materials?

Specifications for cast irons in practice: When specifying cast irons for design and procurement, which property is commonly used as the basis of designation in standards and catalogs?

Surface engineering – Purpose of nitriding steel: In thermochemical surface treatments, what is the principal objective of nitriding a suitable steel component?

Corrosion protection – Meaning of galvanised iron: In everyday engineering practice, “galvanised iron” (GI) primarily implies that the steel/iron surface has been treated to achieve which outcome?

Mechanical properties – Compressive strength comparison: Among the following common ferrous materials, which typically exhibits the highest compressive strength under standard conditions?

In materials engineering, cast iron is known for very high resistance to crushing loads. Which mechanical property of cast iron is characteristically the highest compared with its tensile strength and ductility?

“German silver” (also called nickel silver) is used for decorative items and cutlery. Which constituent metal is present in the maximum proportion in this alloy?

In electrical insulation, the “dielectric strength” of a material refers to which characteristic?

For through-hardening of steel sections, which alloying addition most effectively increases the depth of hardenability (i.e., the depth to which martensite forms upon quenching)?