A:-Have high calorific value
B:-The combustion rate can be easily controlled
C:-Have less Thermal efficiency
D:-Easy to ignite and easy to shutting of operation
Correct Answer:- Option-C
Question88:-Coal gas is obtained
A:-By partial combustion of coal
-By carbonization process of coal
C:-By passing steam over coal
D:-From the by products of blast furnace
Correct Answer:- Option-B
Question89:-To discharge mud and other sediments the boiler is provided ....
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