Presence of free moisture in coal during its high temperature carbonisation _____________________?

Fuels and Combustion 23/12/2021

A. Reduces the coking time
B. Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot
oven walls
C. Increases the loss of fine coal dust from the ovens when charging
D. None of these

Related Mcqs:

    The main drawback of supplying more excess air in the combustion of fuel is the_________________?
    A. Excessive power requirement of air blower B. Enhanced sensible heat loss in the flue gas C. Intermittent and uncontrolled combustion of the fuel D. High exit flue gas temperature from the furnace...
    The main reason for making the copper calorimeter (used in bomb calorimeter) silvery white and shining/polished is to___________________?
    A. Minimise its corrosion B. Avoid radiation heat loss C. Make it look attractive D. None of these...
    Weathering of coal during storage causes_______________?
    A. Reduction in coal size B. Increase in its friability C. Decrease in its caking capacity D. All A., B. and C....
    Calorific value of coke even gas produced by low temperature carbonisation of coal is about ____________ Kcal/Nm3?
    A. 4000 B. 2500 C. 6500 D. 10000...
    Coke oven gas produced by high temperature carbonisation of coal (as compared to that produced by low temperature carbonisation), has_________________?
    A. Higher calorific value B. Lower hydrogen content C. Both A. and B. D. Neither A. nor B....

Leave a Reply

Your email address will not be published. Required fields are marked *