All Free Chemical Engineering MCQs with Answers

• A. Slip casting
• B. Welding
• C. Extrusion
• D. Plastic pressing

Explanation: Ceramics are shaped by processes such as slip casting, extrusion, and plastic pressing before firing, but conventional welding is not used…

• A. Shear
• B. Compressive
• C. Tensile
• D. None of these

Explanation: Concrete is strong in compression but weak in tension, so steel rods are embedded mainly to carry tensile stresses and control cracking.

• A. Bauschinger effect
• B. Hooke's effect
• C. Hysteresis
• D. Relaxation

Explanation: The Bauschinger effect is the reduction in yield strength in compression after a material has been plastically strained in tension, and…

• A. Aluminium
• B. Stainless steel
• C. High silicon (14%) iron
• D. Copper

Explanation: The nitric-acid and ammonia neutralisation process is hot and chemically aggressive, so stainless steel is used for the neutraliser tank…

• A. Cans for food packing
• B. Collapsible tubes for toilet preparations
• C. All A., B. and C.
• D. Foil for wrapping cheese

Explanation: Tin is valued for its non-toxic, corrosion-resistant coating and its ability to form thin sheets, so it is associated with food cans…

• A. Has decreased plasticity at increasing temperature
• B. Cannot be moulded
• C. None of these
• D. Easily deform under pressure at high temperature

Explanation: Thermoplastics soften when heated and can be reshaped by pressure or moulding, then harden again on cooling.

• A. Nuts
• B. Bolts
• C. Studs
• D. Chisels

Explanation: Steel with about 0.4% carbon is medium-carbon steel and is suitable for nuts, bolts, and studs after suitable processing.

• A. Alkaline solutions
• B. Milk and fruit juices
• C. Dilute H2SO4 at room temperature
• D. Brine

Explanation: Glass and Pyrex resist many acids, including dilute sulphuric acid, but strong alkaline solutions attack glass and can damage the pump.

• A. Molybdenum and nickel
• B. Nickel and copper
• C. Molybdenum and aluminium
• D. Molybdenum and zinc

Explanation: Monel is primarily a nickel-copper alloy, with small amounts of iron, manganese, and other elements.

• A. Stainless steel
• B. Wrought iron
• C. Copper
• D. Tin

Explanation: Tin melts at about 232°C, far below copper, wrought iron, and stainless steel, whose melting temperatures are roughly above 1,000°C.

• A. Beer
• B. Aqueous ammonia
• C. H2SO4 (95%)
• D. Phosphoric acid (95%)

Explanation: Brass is comparatively suitable for beer service, whereas ammonia attacks copper alloys and concentrated sulphuric or phosphoric acids are…

• A. Easily machinable
• B. Highly wear resistant
• C. Soft on surface
• D. None of these

Explanation: Rapid cooling of chilled iron forms a hard white-iron layer rich in carbides at the casting surface.

• A. Fatigue
• B. Endurance
• C. Creep
• D. None of these

Explanation: Creep is the gradual, time-dependent deformation of a material under sustained stress, especially at elevated temperature.

• A. Grey iron
• B. Pig iron
• C. Bessemer iron
• D. Wrought iron

Explanation: Wrought iron is the purest of these traditional commercial iron forms, containing very little carbon and much less impurity than pig iron…

• A. Iron
• B. Silver
• C. Tin
• D. Copper

Explanation: Iron readily reacts with oxygen and moisture to form rust, so it is more prone to atmospheric corrosion than silver, tin, or copper.

• A. Ductility
• B. Fluidity & castability
• C. Strength
• D. Malleability

Explanation: Cast iron contains more carbon and melts at a lower temperature with good fluidity, allowing it to fill intricate moulds easily.

• A. Lead
• B. Cadmium
• C. Aluminium
• D. Magnesium

Explanation: Aluminium, lead, and cadmium are used as protective coating metals in suitable applications.

• A. Steel
• B. Cast iron
• C. Asbestos cement
• D. Reinforced cement concrete

Explanation: A cast-iron detachable joint, such as a mechanical coupling arrangement, is commonly used to join steel pipes where dismantling is…

• A. Bismuth
• B. Both B. and C.
• C. Antimony
• D. Arsenic

Explanation: Arsenic and antimony dissolve in copper and strongly scatter conduction electrons, causing a large fall in electrical conductivity even at…

• A. Magnesium & tin
• B. Ferrous material
• C. Copper & zinc
• D. Lead & tin

Explanation: Muntz metal is a copper-zinc alloy containing approximately 60% copper and 40% zinc.