33901. 'Fat coals' are those coals which have very high
33902. Highly reactive coke have lower
33903. A coal with high ash content
33904. Coals used for the generation of producer gas should have
33905. A coal having higher volatile matter content will necessarily have lower
33906. An ordinal number which fixes the position of a document relative to the other documents having the same class is called:
33907. Of the total tar present in raw coke oven gas, the tar recovered in primary cooler is about __________ percent.
33908. With increases in carbonisation temperature
33909. Moisture loss is determined by the
33910. Purity of coke means that, it is high in carbon and low in
33911. Largest constituent of blast furnace gas is
33912. Out of the following, which is the most important parameter for the blast furnace grade coke ?
33913. Presence of nitrogen in combustion air does not reduce the
33914. The gasification reaction represented by, C + H2O = CO + H2, is
33915. Insitu theory and drift theory are related to the
33916. Biochemistry is an example of the mode of formation of subjects:
33917. Heat penetration rate in narrow coke ovens in high temperature carbonisation of coal is around __________ cm/hr.
33918. Which of the following will generate maximum volume of product of complete combustion (Nm3/Nm3 of fuel) ?
33919. Which of the following will be unsuitable for dust cleaning from flue gas at 400°C from a pulverised coal fired boiler ?
33920. Emission of dense white smoke out of the chimney of a thermal power plant is an indication of the use of
33921. Pick out the wrong statement.:
33922. A good metallurgical coke should have very low
33923. Cannel coal
33924. Presence of force moisture in coal is most disadvantageous during its
33925. Tar is a better fuel than furnace oil, because of its
33926. With increase in moisture content of coal, its
33927. Main constituent of natural gas is
33928. For the case of a fuel gas undergoing combustion with air, if the air/fuel ratio is increased, the adiabatic flame temperature will
33929. Ignition temperature decreases progressively from anthracite to lignite, because
33930. Which of the following fuel gases is heavier than air ?
33931. Correct viscosity of furnace oil at the burner tip for proper atomisation is about 25 centistokes. To reduce the viscosity of high viscosity furnace oil (250 centistokes) to the correct atomisation viscosity (i.e. 25 cst), it should be preheated to about____°C.
33932. Theoretical flame temperature of a fuel is that temperature which is attained, when the fuel is completely burnt 'using theoretical amount of air in
33933. Use of preheated air for combustion of fuel in the furnace, increases the
33934. Which of the following has the highest flame velocity ?
33935. Which of the following constituents of a fuel does not contribute to its calorific value on combustion ?
33936. Lurgi gasifier (high pressure gasifier) as compared to Kopper Totzek gasifier (atmospheric pressure gasifier) produces
33937. For long flame and easy ignition, the coal used should have
33938. Which of the following has the highest calorific value (kcal/Nm3) ?
33939. In flue gas analysis by Orsat's apparatus, oxygen is absorbed by
33940. Natural draft created by the chimney depends upon
33941. Coke oven gas after passing through return electrostatic tar precipitator (RETP) is used for the
33942. Calorific value of a typical dry anthracite coal may be around __________ Kcal/kg.
33943. The most matured coal out of the following is
33944. In UDC,equal to(=)sign is used to add:
33945. Which of the following has the highest gross calorific value ?
33946. A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the
33947. Efficient burning of anthracite coal requires
33948. C/H ratio is the minimum in case of
33949. Naphthalene is used for making
33950. The advantage of firing pulverised coal in the furnace lies in the fact, that it
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