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 331 of 350
- A. Drilling
- B. Cutting torch
- C. Punching
- D. None of these
Explanation: Drilling produces accurately sized, smooth holes without the local deformation and residual stresses often caused by punching.
Correct answer: Drilling- A. Lot size corresponding to break even analysis
- B. Optimum lot size
- C. Average level of inventory
- D. None of these
Explanation: EOQ is the order or lot size that minimizes the combined ordering and inventory holding costs.
Correct answer: Optimum lot size- A. Cooling of furnace exhaust gases
- B. Absorbing the pollutant gases from the furnace exhaust
- C. Venting off (after burning) the excess inflammable/toxic gases at high pressure
- D. None of these
Explanation: A flare tower safely burns excess inflammable or toxic gases before discharging the combustion products, preventing dangerous pressure…
Correct answer: Venting off (after burning) the excess inflammable/toxic gases at high pressure- A. Lancing
- B. Spinning
- C. Slugging
- D. Shot peening
Explanation: Shot peening bombards a metal surface with small hard shots, producing compressive residual stresses that resist crack initiation and…
Correct answer: Shot peening- A. Tungsten carbide
- B. Stainless steel
- C. High speed steel
- D. Superalloys
Explanation: Tungsten carbide has a very high elastic modulus, approximately 7 × 10^6 kg/cm², making it much stiffer than steels and superalloys.
Correct answer: Tungsten carbide- A. Elastic
- B. Ultimate
- C. Yielding
- D. Breaking
Explanation: At the yield point, a small increase in load produces a comparatively large extension, marking the beginning of significant plastic…
Correct answer: Yielding- A. Forgings like can shaft, structural steel plate, threading dies and drawing dies
- B. Cutlery, screws, rivets and files
- C. Mandrels, twist drills, small lathe tools and razors
- D. Small punches, broaches reamers and springs
Explanation: Carbon steel containing about 0.9 to 1% carbon is high-carbon steel, which provides high hardness and wear resistance for small punches…
Correct answer: Small punches, broaches reamers and springs- A. Ferromagnetic
- B. Semi-conductor
- C. Paramagnetic
- D. Ferroelectric
Explanation: Nickel is ferromagnetic at ordinary temperatures, although it loses ferromagnetism above its Curie temperature.
Correct answer: Ferromagnetic- A. Toughness
- B. Resilience
- C. Ductility
- D. Impact strength
Explanation: Resilience is the ability to absorb elastic strain energy without permanent plastic deformation and release it upon unloading.
Correct answer: Resilience- A. Hand trolley
- B. Crane
- C. Belt conveyor
- D. Truck
Explanation: A belt conveyor follows a fixed route and is unsuitable when the material path must vary.
Correct answer: Belt conveyor- A. 300
- B. 800
- C. 1400
- D. 2000
Explanation: The commonly quoted electricity consumption for producing one tonne of paper in the Indian paper industry is about 1400 kWh.
Correct answer: 1400- A. (Load)3
- B. (Load)2
- C. (Load)1
- D. (Load)0.33
Explanation: For a ball bearing, the basic rating life follows L10 = (C/P)^3, where P is the applied load.
Correct answer: (Load)3- A. Gantt chart
- B. Travel chart
- C. String diagram
- D. Bin chart
Explanation: A travel chart records the quantities of material moved between different workstations, giving a compact basis for evaluating handling…
Correct answer: Travel chart- A. Hardened steel
- B. Tungsten carbide
- C. Boron carbide
- D. Silicon carbide
Explanation: Boron carbide is commonly regarded as the hardest of these engineering materials, with hardness close to that of diamond.
Correct answer: Boron carbide6615. _______________ is the most important element, which controls the physical properties of steel ?
- A. Manganese
- B. Silicon
- C. Vanadium
- D. Carbon
Explanation: Carbon has the greatest effect on steel hardness, strength, ductility, and weldability because it changes the steel’s microstructure and…
Correct answer: Carbon- A. Draft
- B. Pattern
- C. Casting
- D. Distortion
Explanation: The small taper provided on pattern surfaces to permit easy withdrawal from the mould is called draft allowance.
Correct answer: Draft- A. Higher, as it gives higher wavelength
- B. Lower, as it gives higher wavelength
- C. Higher, as it gives shorter wavelength
- D. Lower, as it gives shorter wavelength
Explanation: Thicker plates require more penetrating X-rays, obtained by increasing tube voltage.
Correct answer: Higher, as it gives shorter wavelength- A. Mild steel
- B. Concrete
- C. Cast iron
- D. Asbestos cement
Explanation: Lead is traditionally caulked into the socket joints of cast-iron pipes because it seals the joint while allowing slight movement.
Correct answer: Cast iron- A. Gold & silver
- B. Nickel
- C. Aluminium
- D. Copper
Explanation: Aluminium, copper and nickel can form adherent oxide films that protect their surfaces from further oxidation.
Correct answer: Gold & silver- A. Iron
- B. Copper
- C. Steel
- D. Nickel
Explanation: Die casting commonly uses low-melting nonferrous alloys, and copper is the suitable choice among the listed materials.
Correct answer: Copper