Power Engineering 3B1 Chapter 7 Questions with Complete Solutions (Latest 2025) When furnace draft is maintained at atmospheric pressure (or
just below), the draft is referred to as:
- Natural draft
- Forced draft
- Induced draft
- Balanced draft
- negative draft - Correct Answers ✅d
Natural draft is the difference in pressure caused by:
- The height of the furnace
- The temperature in the furnace
- The diameter of the stack
- The atmospheric air conditions
- the height of the stack - Correct Answers ✅e
Advantages of mechanical draft are:.
Better purging of boiler Less expensive stack can be used Less supervision during operation Increases unit efficiency 1,2
1,2,3 1 / 2
Power Engineering 3B1 Chapter 7 Questions with Complete Solutions (Latest 2025) 1,2,4 2,3,4 1,4 - Correct Answers ✅c
Disadvantages of mechanical draft are:
Higher initial cost Closer supervision is required More expensive stack must be used Draft is dependent on atmospheric condition 1,4 1,3 2,3 3,4 1,2 - Correct Answers ✅e
Draft is a term that indicates:
- Atmospheric pressure
- Static pressure
- Absolute pressure
- Friction pressure
- gauge pressure - Correct Answers ✅b
- / 2