Related Questions

Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are normally carried out at about __________ °C.
A 400-500
B 900-1000
C 1400-1500
D 1700-1800
তরল অবস্থায় পরিবর্তিত না হয়ে কঠিন অবস্থা থেকে সরাসরি গ্যসীয় অবস্থায় রূপান্তরিত হওয়ার পদ্ধতিকে বলে(The conversion of solid state directly into a gaseous state eithout passing through liquid state is called)
A Sublimation
B Evaporation
C Freezing
D Boiling
In the gaseous diffusion process of uranium enrichment, the natural uranium is converted into gaseous
A Uranium oxide
B Uranium hexaflouride
C Uranium carbide
D Uranium sulphate
While dissolving a gas into a liquid at a constant temperature, the ratio of the concentration of the gas in the solution phase and in the gaseous phase is
A Infinity
B Unity
C Constant
D Negative
Height of liquid in agitation tank is normally maintained equal to the tank diameter. However, if the tank is too tall and a large liquid hold up is desired, then two or more impellers mounted on the same shaft may be used. The clearance between the tank bottom and the bottom most impeller should be about (where, D = impeller diameter)
A 0.5 D
B D
C 1.5 D
D 2 D
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
A Kinetic energy
B Intermolecular forces of attraction
C Potential energy
D Total energy
What is the process of conversion of solid state directly to gaseous state called?
A Evaporation
B Condensation
C Sublimation
D Distillation
Separation of a suspension or slurry into a supernatant clear liquid (free from particles) and a thick sludge containing a high concentration of solid is called
A Classification
B Sedimentation
C Clarification
D Decantation
Presence of __________ in a dry gaseous fuel does not contribute to its calorific value.
A Sulphur
B Oxygen
C Hydrogen
D Carbon
At which height, the gaseous surrounding has covered the Earth's atmosphere?
A 100km
B 150km
C 200km
D 300km

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