01. Carbonisation of coal is the process of
strongly heating coal continuously or about 48 hours in the absence of air in a closed vessel.
02.Coke is produced by
strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel.
Explanation:- Coke is dull black in color, porous and smokeless. It has a high carbon content (85 to 90%) and has a higher calorific value than coal.
03. Super heating of steam is done at
constant pressure.
04.Sublimation region is the region where
solid and vapour phases are in equilibrium.
05. Stoichiometric quantity of air is the
air required for complete combustion of fuel with no excess air.
06.On Mollier chart, flow through turbine is represented by
straight inclined line.
07.The bituminous coal is non-caking if its carbon content is
78 – 81%.
08.In a throttling process
steam enthalpy remains constant.
09.Adiabatic process is
non-heat transfer process.
10. Hygrometry deals with the
water vapour in air.
11.Orsat meter is used for
volumetric analysis of the flue gases.
12.An ideal regenerative cycle is
less than Carnot cycle.
13.The following boiler makes use of
pressurized combustion
Velox.
14.Lancashire boiler is a
stationary fire tube boiler.
15.Efficiency of a thermal cycle increases by
A: regeneration
B: reheating of steam
C: both (a) and (b).
16.One kilowatt-hour energy is equivalent to
3600 kJ.
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