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 335 of 350
- A. Copper
- B. Aluminium
- C. Brass
- D. Lead
Explanation: Brass has a strong tendency to harden during plastic deformation, so successive forming operations can rapidly increase its strength and…
Correct answer: Brass- A. Steel
- B. Glass
- C. Rubber
- D. Brass
Explanation: Elasticity here means resistance to deformation under a given load, so the material with the highest modulus of elasticity is considered…
Correct answer: Steel- A. Four
- B. Two
- C. Six
- D. Eight
Explanation: For a similar riveted joint, the usual Unwin relation gives rivet diameter d proportional to the square root of plate thickness t.
Correct answer: Two- A. Has higher current carrying capacity
- B. Is stronger than ordinary tungsten
- C. Has better electron emissivity
- D. Is easy to prepare
Explanation: Thorium oxide added to tungsten increases thermionic electron emission, allowing the electrode to emit electrons more readily and maintain…
Correct answer: Has better electron emissivity- A. Zirconia
- B. Alumina
- C. Bakelite
- D. Tungsten carbide
Explanation: A cermet combines a ceramic or carbide phase with a metallic binder; tungsten carbide tools commonly contain cobalt as the metallic phase.
Correct answer: Tungsten carbide6686. 'Amortization' in respect of financial obligation of a company means the_____________________?
- A. Liquidation of financial obligations on instalment basis
- B. Commitment of financial obligation on priority
- C. Liquidation of all the obsolete equipments of the company
- D. Modernisation of the plant equipments
Explanation: Amortization means paying off a financial obligation gradually through scheduled instalments.
Correct answer: Liquidation of financial obligations on instalment basis- A. 5-10
- B. 120-500
- C. 1000-1500
- D. 1500-3000
Explanation: Galvanized steel commonly carries about 120 to 500 g of zinc per square metre, depending on the required coating grade.
Correct answer: 120-500- A. Carburising
- B. Oxidising
- C. Neutral
- D. All A, B. & C
Explanation: A neutral flame supplies approximately equal oxygen and fuel and avoids adding excess carbon or oxygen to the weld.
Correct answer: Neutral- A. 2 and 50
- B. 10 and 50
- C. 7 and 30
- D. 13 and 55
Explanation: A private limited company requires at least two members and, under the stated conventional company-law limit, can have up to 50 members.
Correct answer: 2 and 50- A. Fatigue
- B. Tensile
- C. Impact
- D. None of these
Explanation: A tensile test produces a stress-strain curve, from which yield strength and Young's modulus are obtained; elongation and reduction in…
Correct answer: Tensile- A. Lead
- B. Graphite
- C. Stainless steel
- D. Cast iron
Explanation: Graphite crucibles tolerate very high temperatures and resist chemical attack by many molten metals.
Correct answer: Graphite- A. Tempered
- B. Normalised
- C. Annealed
- D. Hardened
Explanation: Annealing softens a cold-worked part and restores ductility by relieving residual stresses and reducing the effects of strain hardening.
Correct answer: Annealed- A. Mechanical
- B. Machining
- C. Refractory
- D. Magnetic
Explanation: A large silicon addition improves the magnetic behaviour of steel, particularly its electrical resistivity and suitability for transformer…
Correct answer: Magnetic- A. Only
- B. Plus variable cost
- C. Plus overhead cost
- D. Plus selling expenses
Explanation: At break-even, total revenue equals total cost, and total cost is the sum of fixed cost and variable cost.
Correct answer: Plus variable cost- A. Pitting
- B. Corrosion
- C. Erosion
- D. None of these
Explanation: Erosion is the removal or damage of a metal surface by mechanical action, such as impinging particles or a high-velocity fluid.
Correct answer: Erosion6696. Stresses encountered in the metal forming processes are less than the _____________ of the material?
- A. Limit of proportionality
- B. Yield strength
- C. Elastic limit
- D. Fracture strength
Explanation: Metal-forming stresses must be high enough to cause plastic deformation, but they remain below the material’s fracture strength.
Correct answer: Fracture strength- A. Face centred cubic (fcc)
- B. Hexagonal close packed (hcp)
- C. Body centred cubic (bcc)
- D. None of these
Explanation: Face-centred cubic metals have many closely packed slip systems, allowing plastic deformation in several directions and giving high…
Correct answer: Face centred cubic (fcc)- A. Resource idleness
- B. Precedence relationship
- C. Resource restriction
- D. Necessary time delay
Explanation: A dummy activity in PERT has zero duration and consumes no resources; it is inserted only to show the correct precedence relationship…
Correct answer: Precedence relationship- A. Flanged iron
- B. Flexible
- C. Collar
- D. Expansion
Explanation: Large-diameter RCC pipes are commonly connected using collar joints, in which a collar sleeve joins the adjoining pipe ends.
Correct answer: Collar- A. H
- B. H/2
- C. H/4
- D. H/6
Explanation: The commonly specified minimum spacing between liquid-fuel storage tanks is H/6, where H is the tank height.
Correct answer: H/6