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- Question
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
- Correct Answer
- Gr0.25, Gr
- 1. Corrosion of metals can not be prevented by its
Options- A. tempering
- B. chromising
- C. aluminising
- D. alloying Discuss
- 2. 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
- 3. 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
- 4. 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
- 5. Machinability of hard alloys and tool steels is improved by
Options- A. spherodising
- B. annealing
- C. tempering
- D. normalising Discuss
- 6. Annealing ofwhite cast iron produces __________ iron.
Options- A. grey
- B. nodular
- C. malleable
- D. spheroidal Discuss
- 7. An alloy of Fe - 0.4 % C is
Options- A. cast iron.
- B. hypo-eutectoid steel.
- C. hyper-eutectoid steel.
- D. eutectoid steel Discuss
- 8. Auto collimator is used to check
Options- A. flatness
- B. angle
- C. rotor balancing
- D. roughness Discuss
- 9. All of the following alloying elements of steel increases hardness but sacrifice ductility, except
Options- A. nickel
- B. vanadium
- C. molybdenum
- D. chromium Discuss
- 10. In the blast furnace, incorporation of water vapour in the blast gives the following effect.
Options- A. Increases the reducing potential of the gas.
- B. Increases the flame temperature.
- C. No significant change occurs.
- D. Increases the hydrogen content in the metal. Discuss
Chemical Engineering Basics problems
Search Results
Correct Answer: tempering
Correct Answer: sensible heat is removed and the latent heat is added.
Correct Answer: chemical systems in equilibrium.
Correct Answer: breeder
Correct Answer: annealing
Correct Answer: malleable
Correct Answer: hypo-eutectoid steel.
Correct Answer: angle
Correct Answer: nickel
Correct Answer: Increases the reducing potential of the gas.
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