Chemical Engineering Basics problems
- 1. The product out from a cupola is called
Options- A. wrought iron
- B. pig iron
- C. cast iron
- D. none of these Discuss
Correct Answer: cast iron
- 2. In condensers used in thermal power plants, steam is normally used in shell side and cooling water on the tube side, because of the reason that
Options- A. compared to the mass flow rate of cooling water, the rate of condensation of steam is invariably smaller.
- B. maintaining vacuum on tube side is more difficult than that on the shell side.
- C. water velocity can be increased conveniently to increase the overall heat transfer co-efficient because of its lower specific volume compared to steam.
- D. condenser can act as a storage unit for condensed steam. Discuss
Correct Answer: water velocity can be increased conveniently to increase the overall heat transfer co-efficient because of its lower specific volume compared to steam.
- 3. Which one of the following is incombustible?
Options- A. H2
- B. CCl4
- C. C2H2
- D. S Discuss
Correct Answer: CCl4
- 4. __________ is the hardest oxide and is hence used where high wear resistance at high temperature is required.
Options- A. Beryllia
- B. Zirconia
- C. Alumina
- D. Magnesia Discuss
Correct Answer: Alumina
- 5. Machinability of hard alloys and tool steels is improved by
Options- A. spherodising
- B. annealing
- C. tempering
- D. normalising Discuss
Correct Answer: annealing
- 6. If a nuclear reactor produces more fissile nuclear fuel than it consumes, then it is called a __________ reactor.
Options- A. critical
- B. breeder
- C. fertile
- D. heterogenous Discuss
Correct Answer: breeder
- 7. Maxwell's thermodynamic relations applies to the
Options- A. chemical systems in equilibrium.
- B. mechanical systems in equilibrium.
- C. irreversible thermodynamic processes.
- D. reversible thermodynamic processes. Discuss
Correct Answer: chemical systems in equilibrium.
- 8. Evaporative cooling process employs a combination of cooling and humidification in which the
Options- A. sensible heat is added.
- B. sensible heat is removed and the latent heat is added.
- C. latent heat is removed.
- D. sensible heat is added and latent heat is removed. Discuss
Correct Answer: sensible heat is removed and the latent heat is added.
- 9. Corrosion of metals can not be prevented by its
Options- A. tempering
- B. chromising
- C. aluminising
- D. alloying Discuss
Correct Answer: tempering
- 10. Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as
Options- A. Gr0.25, Gr
- B. Gr0.25, Gr0.33
- C. Gr, Gr0.25
- D. Gr0.33, Gr0.25 Discuss
Correct Answer: Gr0.25, Gr
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