Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is _______________ percent?

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...

Advantages of fluidised bed combustion are ____________________?

A. Reduced NOx formation in flue gas B. Lower furnace operating temperature C. High heat transfer rate D. All A., B. & C....

Which of the following has the highest calorific value (kcal/Nm3) ?

A. Carburetted water gas B. Gobar gas C. Natural gas D. LPG...

Short/intense flame is produced during combustion of gaseous fuel by using________________?

A. High amount/current of combustion air B. Low amount/current of combustion air C. Preheated secondary air D. Very little excess air...

Coke oven gas is stripped of its H2S and mercaptans content by_________________?

A. Absorption in wash oil B. Adsorption on bog iron bed C. Bubbling it through dilute sulphuric acid D. Adsorption on silica gel...