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- Question
Metallic wire mesh is used as a filtering medium for the separation of dust from dust laden gas in case of a/an
Options- A. air filter
- B. bag filter
- C. venturi scrubber
- D. hydrocyclones
- Correct Answer
- air filter
- 1. Na2SO4. 10H2O crystals are formed by cooling 100 Kg of 30% by weight aqueous solution of Na2SO4. The final concentration of the solute in the solution is 10%. The weight of crystals is
Options- A. 20
- B. 32.2
- C. 45.35
- D. 58.65 Discuss
- 2. The units of Young's modulus of elasticity and __________ are the same.
Options- A. strain
- B. stress
- C. modular ratio
- D. none of these Discuss
- 3. All of the following alloying elements of steel increases hardness but sacrifice ductility, except
Options- A. nickel
- B. vanadium
- C. molybdenum
- D. chromium Discuss
- 4. The molecular velocity of a real gas is proportional to (where, T = absolute temperature of the gas).
Options- A. T
- B. T
- C. T2
- D. 1/T Discuss
- 5. Nitrogen gas constant volume thermometer is suitable for measuring a temperature of __________ °C.
Options- A. 0-100
- B. < 0
- C. > 100.
- D. > 50 Discuss
- 6. A certain pressure vessel manufacturer avoids doing reinforcements calculations for openings by always providing a reinforcing pad extending upto double the diameter of the opening and of the same material and thickness as that of the shell wall. If area compensation is accepted as a code guideline, his approach leads to safe design
Options- A. only if the opening is on spherical vessel.
- B. only if the opening is on a vertical cylinderical vessel.
- C. only if the opening is on a horizontal cylinderical vessel.
- D. irrespective of the shape of the vessel. Discuss
- 7. Out of the following fuels used in a furnace exhausting flue gas at a temperature of 600°C, the percentage stack loss will be maximum in case of complete combustion of
Options- A. furnace oil with air.
- B. furnace oil with oxygen.
- C. blast furnace gas with air.
- D. blast furnace gas with oxygen. Discuss
- 8. Magnesite refractories are used for the construction of those furnaces, which are
Options- A. not required to resist the corrosive action of basic slag.
- B. not subjected to fluctuation in temperature.
- C. used for raising & maintaining high temperature.
- D. both (b) and (c) Discuss
- 9. Presence of nitrates in water in excess of 50 ppm causes
Options- A. mathenoglobenemia
- B. gastroentetitis
- C. asphyxiation
- D. tooth decay Discuss
- 10. Mercaptans are
Options- A. low boiling sulphur compounds.
- B. added in LPG cylinders to detect gas leakage by its smell.
- C. undesirable in petrol, as they reduce its octane number.
- D. all (a), (b) and (c) Discuss
More questions
Correct Answer: 58.65
Correct Answer: stress
Correct Answer: nickel
Correct Answer: T
Correct Answer: > 100.
Correct Answer: irrespective of the shape of the vessel.
Correct Answer: blast furnace gas with air.
Correct Answer: both (b) and (c)
Correct Answer: mathenoglobenemia
Correct Answer: all (a), (b) and (c)
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