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- Question
In the design of a shell and tube heat exchanger, the corrosion allowance
Options- A. need not be provided for non-pressure parts like tie rods, spacers, baffles, supports etc.
- B. for carbon steel and cast iron pressure parts is 1.5 mm (except for tubes) and for severe conditions it is 3 mm.
- C. for internal cover and tube sheet is provided on both the sides.
- D. all (a), (b) & (c).
- Correct Answer
- all (a), (b) & (c).
- 1. Thorium-232 (a fertile material) on absorption of a neutron gets converted into __________ , which is a fissile material.
Options- A. thorium-233
- B. uranium-235
- C. uranium-233
- D. plutonium-239 Discuss
- 2. Nucleus of tritium has __________ neutrons.
Options- A. 1
- B. 2
- C. 3
- D. 5 Discuss
- 3. The phenomenon of radioactivity was discovered by
Options- A. Madam Curie
- B. Bacquerrel
- C. Roentgen
- D. J.J. Thomson Discuss
- 4. Width and speed of a conveyor belt depends upon the __________ of the material.
Options- A. lump size
- B. bulk density
- C. both (a) & (b)
- D. neither (a) nor (b) Discuss
- 5. Bulk of the convective heat transfer resistance from a hot tube surface to the fluid flowing in it, is
Options- A. in the central core of the fluid.
- B. uniformly distributed throughout the fluid.
- C. mainly confined to a thin film of fluid near the surface.
- D. none of these. Discuss
- 6. Bakelite is
Options- A. same as polytetra flouro ethylene (PTFE).
- B. an inorganic polymer.
- C. same as thermoset phenol formaldehyde.
- D. not a polymer. Discuss
- 7. Size reduction mechanism used in Jaw crushers is
Options- A. attrition
- B. compression
- C. cutting
- D. impact Discuss
- 8. Refractory bricks having lower porosity have
Options- A. high insulating properties
- B. low heat capacity
- C. low thermal conductivity
- D. greater strength Discuss
- 9. (CH3 C6 H4)3 PO4 is the chemical formula of
Options- A. triple superphosphate
- B. tricresyl phosphate
- C. flourapatite
- D. superphosphate Discuss
- 10. Catalyst used in the oxidation of ammonia is
Options- A. platinum-beryllium
- B. platinum-rhodium
- C. cobalt-molybdenum
- D. platinum-molybdenum Discuss
More questions
Correct Answer: uranium-233
Correct Answer: 2
Correct Answer: Bacquerrel
Correct Answer: both (a) & (b)
Correct Answer: mainly confined to a thin film of fluid near the surface.
Correct Answer: same as thermoset phenol formaldehyde.
Correct Answer: compression
Correct Answer: greater strength
Correct Answer: tricresyl phosphate
Correct Answer: platinum-rhodium
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