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43.

The coal requirement per kW hour generation in the thermal power plant is of the order of                        
A. 0.1 to 0.2 kg B. 0.2 to 0.4 kg
C. 0.6 to 0.8 kg D. 1.0 to 1.5 kg



44.

The crown of the fire box is made hemispherical in order to                        
A. give maximum space B. give maximum strength
C. withstand pressure inside boiler , D. resist intense heat in fire box



45.

The diameter of Cornish boiler is of the order of                        
A. 1-2 m B. 1.5-2.5 m
C. 2-3 m D. 2.5-3.5 m




46.

The diameter of cylindrical shell of the Lancashire boiler is of the order of                        
A. 1 tp 1.25m B. 1 to 1.75 m
C. 2 to 4 m D. 1.75 to 2.75 m



47.

The diameter of fire tube of Cornish boiler compared to its shell is                        
A. one half B. one third
C. one-fifth D. two-fifth



48.

The diameter of tubes for natural circulation boiler as compared to controlled circulation boilers is                        
A. more B. less
C. same D. could be more or less depending on other factors



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