All Free Chemical Engineering MCQs with Answers

• A. Monel
• B. Stainless steel type 304
• C. Nickel
• D. Carbon steel

Explanation: Monel provides strong resistance to fuming sulphuric acid and is therefore used where ordinary steels or common stainless steels may…

• A. Is lined with lead
• B. Need not be lined
• C. Is lined with rubber
• D. Is lined with acid-proof bricks

Explanation: Oleum can be stored in a suitably designed carbon-steel tower without a lead, rubber or brick lining because concentrated sulphuric acid…

• A. Ammonia (both aqueous & anhydrous)
• B. Fruit juices, milk & its products and caustic soda solution
• C. Nitric acid & hydrochloric acid (concentrated)
• D. Sulphuric acid (concentrated)

Explanation: Nickel equipment is valued for resistance to caustic soda and for hygienic handling of food products such as milk and fruit juices.

• A. Very high cost
• B. Very low strength to weight ratio
• C. Rather low tensile strength
• D. Scarce availability

Explanation: Aluminium has a comparatively low tensile strength in its unalloyed or common forms, although it is light and therefore can still have a…

• A. Aluminium
• B. Silver
• C. Calcium
• D. Iron

Explanation: Aluminium rapidly forms a thin, adherent aluminium oxide film that isolates the underlying metal from air and moisture.

• A. Stainless steel
• B. Cast iron
• C. Lead lined steel
• D. Rubber lined steel

Explanation: Cast iron has good resistance to concentrated sulphuric acid at about 98% concentration and is therefore used for such coolers.

• A. Brittle
• B. Whitish in color
• C. Malleable
• D. Strong and hard

Explanation: White cast iron contains carbon mainly as cementite, making it very hard but brittle and difficult to machine or deform.

• A. Not resistant to corrosion
• B. Used as a cathodic material
• C. Not used as pigment (in its compound forms) for paints
• D. Used as a shock absorber (in mattress form) between the foundation and steel framework of
• E. skyscraper buildings

Explanation: Lead is highly corrosion-resistant and is used in sheet or mattress-like layers to absorb vibration and shock in heavy structures.

• A. Pig iron
• B. Wrought iron
• C. Low carbon steel
• D. Mild steel

Explanation: Pig iron is the blast-furnace product containing high carbon and impurities; it is remelted and cast into useful cast-iron shapes.

• A. Rupture strength and hot hardness
• B. Deformation resistance
• C. Impact strength and bonding strength
• D. Wear resistance

Explanation: Antimony strengthens tin-based alloys and makes them more resistant to plastic deformation under load.

• A. Increases in proportion to stress
• B. Decreases very quickly
• C. Increases very quickly
• D. Decreases in proportion to stress

Explanation: At the elastic limit, the material begins to yield, so a small further increase in stress produces a comparatively large increase in…

• A. Monel metal
• B. Gun metal
• C. Wood metal
• D. Babbitt metal

Explanation: Monel, a nickel-copper alloy, resists concentrated caustic soda and many other alkaline environments.

• A. Lead lined stainless steel
• B. Steel or cement-brick lined
• C. Cast iron
• D. Hard wood

Explanation: A sulphur melting pit is commonly constructed from steel with a cement-brick lining to withstand heat and protect the steel from the…

• A. Platinum & mercury
• B. Iron & mercury
• C. Iron & carbon
• D. None of these

Explanation: Iron and carbon form iron-carbon alloys such as steel and cast iron, with their properties controlled by carbon content.

• A. Malleability
• B. Ductility
• C. Thermal & electrical conductivity
• D. Tensile strength

Explanation: Copper is highly malleable and ductile and is an excellent conductor of heat and electricity.

• A. Aluminium
• B. Copper
• C. High carbon steel
• D. Nickel

Explanation: Aluminium is suitable for storing refined acetic acid because it develops a protective oxide film and resists attack by the acid under…

• A. Fish plates
• B. Channels
• C. Die block
• D. Drop forging

Explanation: Mild steel is widely used for structural sections such as channels because it is strong, ductile, weldable and economical.

• A. Carbon content
• B. Manufacturing process
• C. Hardness
• D. Tensile strength

Explanation: Cast irons are commonly designated by their tensile strength because their carbon content and manufacturing route vary widely among…

• A. Concrete
• B. Cast iron
• C. Nickel
• D. Steel with top section nickel clad or stainless steel

Explanation: A soap kettle handles hot, corrosive alkaline liquor, so its body is commonly steel with the upper or most exposed section nickel-clad or…

• A. Corrosion resistance
• B. Cutting ability
• C. Wear resistance
• D. All A., B. and C.

Explanation: Nickel improves the corrosion resistance of steel by promoting a more stable and protective alloy surface.