Boiler Draught and Combustion Quiz

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What is the function of the draught in a boiler?

To regulate the temperature of the boiler

To reduce the efficiency of combustion

To increase the pressure in the boiler

To force air to the fire and carry away gaseous products of combustion (correct)

Which type of draught is obtained through the use of a chimney?

Mechanical draught

Artificial draught

Natural draught (correct)

Stem jet draught

What is the primary classification of draught types mentioned in the text?

Industrial draught and residential draught

Mechanical draught and steam jet draught

Steam draught and chimney draught

Natural draught and artificial draught (correct)

What materials can be used to build a chimney for obtaining natural draught?

Masonry, concrete, or steel Signup and view all the answers

Why is proper combustion in a boiler furnace dependent on the quantity of air supplied?

To maintain optimal conditions for efficient burning Signup and view all the answers

What is the purpose of having a chimney in a boiler installation?

To produce draught for air and gas flow and to discharge combustion products safely Signup and view all the answers

What is the main reason for the draught produced by a chimney?

Difference in density between hot gases inside the chimney and cold air outside Signup and view all the answers

Why do the flue gases leaving a chimney in a natural draught system have a higher temperature compared to artificial draught systems?

To improve the thermal efficiency of the boiler plant installation Signup and view all the answers

What is one of the reasons for loss in draught in a chimney?

Frictional resistance in gas passages Signup and view all the answers

How does the absolute temperature of chimney gases relate to the effectiveness of chimney draught?

It must bear a certain relation to outside air temperature for maximum effectiveness Signup and view all the answers

Why does natural draught result in higher heat carried away by flue gases compared to artificial draught?

To meet minimum temperature requirements for producing a given draught Signup and view all the answers

In a chimney, what constitutes about 20% of the total draught loss?

Frictional resistance offered by flues Signup and view all the answers

Boiler Draught and Combustion Quiz

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Questions and Answers

What is the function of the draught in a boiler?

Which type of draught is obtained through the use of a chimney?

What is the primary classification of draught types mentioned in the text?

What materials can be used to build a chimney for obtaining natural draught?

Why is proper combustion in a boiler furnace dependent on the quantity of air supplied?

What is the purpose of having a chimney in a boiler installation?

What is the main reason for the draught produced by a chimney?

Why do the flue gases leaving a chimney in a natural draught system have a higher temperature compared to artificial draught systems?

What is one of the reasons for loss in draught in a chimney?

How does the absolute temperature of chimney gases relate to the effectiveness of chimney draught?

Why does natural draught result in higher heat carried away by flue gases compared to artificial draught?

In a chimney, what constitutes about 20% of the total draught loss?

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