Free Chemical Process Principles MCQs with Answers
2,710 Chemical Process Principles MCQs from Chemical Engineering, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
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- A. TNT
- B. CMC
- C. RDX
- D. Lead azide
Explanation: TNT, RDX and lead azide are energetic explosive compounds used in explosive or detonator applications.
Correct answer: CMC- A. 0°
- B. 32°
- C. 62°
- D. 212°
Explanation: On the Fahrenheit scale, the melting point of pure ice at standard atmospheric pressure is 32°F.
Correct answer: 32°- A. Kudremukh
- B. Kolar
- C. Ramagundam
- D. Khetri
Explanation: Khetri in Rajasthan is one of India's well-known copper-producing areas.
Correct answer: Khetri- A. Bauxite
- B. Chalcocite
- C. Galena
- D. None of these
Explanation: Bauxite is the principal ore of aluminium and is processed to alumina before electrolytic reduction.
Correct answer: Bauxite- A. Critical
- B. Breeder
- C. Fertile
- D. Heterogeneous
Explanation: A breeder reactor produces more fissile material than it consumes by converting fertile isotopes into fissile fuel.
Correct answer: Breeder- A. Increase fluidity of solder by lowering its melting temperature
- B. Full up the joint gap
- C. Wash away surplus solder
- D. Prevent oxide formation
Explanation: Flux removes existing oxide films and prevents further oxidation of the metal surfaces during soldering, allowing the solder to wet and…
Correct answer: Prevent oxide formation- A. Liquid dispersed in gas
- B. Solid dispersed in liquid
- C. Solid dispersed in gas
- D. Gas dispersed in liquid
Explanation: Fog consists of fine liquid water droplets dispersed in air, so it is a liquid-in-gas aerosol.
Correct answer: Liquid dispersed in gas- A. Forging
- B. Investment casting
- C. Shell moulding
- D. Pressure die casting
Explanation: Investment casting can produce intricate turbine blades with accurate dimensions and internal cooling passages, often using…
Correct answer: Investment casting- A. Hot rolled mild
- B. Forged
- C. Cold rolled mild
- D. Machinable stainless
Explanation: Keys are commonly made from cold-rolled mild steel because it provides adequate strength and a sound, uniform bar for resisting shear and…
Correct answer: Cold rolled mild- A. Easily weldable characteristics
- B. Ability to hold protective coating
- C. High ductility & corrosion resistance
- D. Uniform strength in all directions
Explanation: Wrought iron contains elongated slag inclusions from working, giving it directional or non-uniform mechanical properties.
Correct answer: Uniform strength in all directions- A. Electrical
- B. Thermal
- C. Mechanical
- D. Chemical
Explanation: A solar cell uses the photovoltaic effect to convert light directly into electrical energy.
Correct answer: Electrical- A. Low pressure & load
- B. High pressure & load
- C. High temperature
- D. Large surface wear
Explanation: Tin-based white metals, such as tin babbitt alloys, provide good bearing performance under high pressure and heavy load while resisting…
Correct answer: High pressure & load- A. No preferred shape
- B. Nodular
- C. Irregular
- D. Spherical
Explanation: Spherical powder particles are preferred because they flow readily and produce a controlled, interconnected pore structure after…
Correct answer: Spherical- A. Alumina
- B. Zirconia
- C. Beryllium
- D. Magnesia
Explanation: Alumina is extremely hard, with a Mohs hardness close to 9, and retains strong wear resistance at elevated temperature.
Correct answer: Alumina- A. X-rays
- B. γ-rays
- C. α-rays
- D. β-rays
Explanation: Cobalt-60 undergoes beta decay and produces intense gamma radiation, which can penetrate tissue and industrial components.
Correct answer: γ-rays- A. Velocity
- B. Both A. & B.
- C. Acceleration
- D. Neither A. nor B.
Explanation: In simple harmonic motion, acceleration is proportional to displacement and opposite in direction: a = −ω²x.
Correct answer: Acceleration2557. The best guide to judge the general quality of water is the measurement of its__________________?
- A. pH value
- B. Turbidity
- C. Electrical conductivity
- D. Dissolved oxygen content
Explanation: Electrical conductivity reflects the concentration of dissolved ionic substances, so it provides a useful overall indication of water…
Correct answer: Electrical conductivity2558. Nuclear fission of one atom of uranium-235 produces the energy equivalent to about ____________ MeV?
- A. 20
- B. 200
- C. 500
- D. 2000
Explanation: A uranium-235 fission event releases about 200 MeV, mainly as kinetic energy of the fission fragments and some neutron and gamma energy.
Correct answer: 200- A. 0°R
- B. 50°K
- C. 0°C
- D. None of these
Explanation: Absolute zero is 0 K, which is also 0°R on the absolute Rankine scale. It is not 0°C, since 0°C equals 273.15 K.
Correct answer: 0°R- A. Ultraviolet rays
- B. Infrared rays
- C. Cosmic rays
- D. X-rays
Explanation: Cosmic rays have extremely high energies and correspondingly very short wavelengths, shorter than ultraviolet, infrared, and X-rays.
Correct answer: Cosmic rays