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- Question
Radioactivity of an isotope is expressed in
Options- A. barn
- B. MeV
- C. Curie
- D. Ergs
- Correct Answer
- Curie
- 1. Pick out the wrong statement pertaining to 'Horton sphere' used for the storage of liquid ammonia.
Options- A. Diameter of Horton sphere is normally 6 to 25 metres and it is supported by 6 to 12 nos. tubular or rolled section column.
- B. Thickness of spherical shell is half that of the cylinderical vessel under same operating pressure condition. Besides, the ratio of surface area to volume is less for sphere than any other shape ; hence insulation required is less.
- C. Horton sphere is used for the storage of gases and volatile liquid at a moderate pressure of 1 to 10 kg/cm2 .
- D. Horton sphere is used for the storage of liquid at sub-zero temperature at very high pressure upto 200 kg/cm2 . Discuss
- 2. __________ taxes are based on gross earnings.
Options- A. Property
- B. Excise
- C. Income
- D. Capital gain Discuss
- 3. The number of atoms of oxygen present in 11.2 litres of ozone (O3) at N.T.P. are
Options- A. 3.01 x 1022
- B. 6.02 x 1023
- C. 9.03 x 1024
- D. 1.20 x 1024 Discuss
- 4. The monomer for the production of neoprene rubber is
Options- A. acetylene
- B. chloroprene
- C. isoprene
- D. none of these Discuss
- 5. Maximum apparent porosity of magnesite bricks is about __________ percent.
Options- A. 8
- B. 24
- C. 44
- D. 58 Discuss
- 6. A particle A of diameter 10 microns settles in an oil of specific gravity 0.9 and viscosity 10 poise under Stoke's law. A particle B with diameter 20 microns settling in the same oil will have a settling velocity
Options- A. same as that of A.
- B. one fourth as that of A.
- C. twice as that of A.
- D. four times as that of A. Discuss
- 7. Pick out the wrong statement.
Options- A. A ceramic material which becomes fluid upon heating and can be moulded in liquid/viscous state is termed s glass.
- B. Ceramic materials do not undergo vitrification on heating.
- C. Ceramic materials are brittle in nature.
- D. Non-oxide ceramic materials generally act as a semi-conductor. Discuss
- 8. P2O5 percentage in the phosphoric acid produced by wet process is about
Options- A. 10
- B. 30
- C. 50
- D. 70 Discuss
- 9. Unit of radioactivity is
Options- A. barn
- B. fermi
- C. angstrom
- D. curie Discuss
- 10. A liquid is in equilibrium with its vapor at its boiling point. On an average, the molecules in the liquid and gaseous phases have equal
Options- A. kinetic energy.
- B. intermolecular forces of attraction.
- C. potential energy.
- D. total energy. Discuss
More questions
Correct Answer: Horton sphere is used for the storage of liquid at sub-zero temperature at very high pressure upto 200 kg/cm2 .
Correct Answer: Income
Correct Answer: 9.03 x 1024
Correct Answer: chloroprene
Correct Answer: 24
Correct Answer: one fourth as that of A.
Correct Answer: Ceramic materials do not undergo vitrification on heating.
Correct Answer: 30
Correct Answer: curie
Correct Answer: kinetic energy.
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