Book 1: Unit 4 - Review: Chapter 13 - 14 Flashcards
The most common type of rotary pump used for boiler fuel oil is the _____ pump.
Select one:
A. Piston
B. Centrifugal
C. Diaphragm
D. External or internal gear
E. Rotary lobe
D. External or internal gear
On larger boilers both forced draft and induced draft fans are used for better control of:
Select one:
A. Combustion air
B. Fuel volumes
C. Furnace pressure
D. Air volumes
E. Flue gases
C. Furnace pressure
The components of coal that are combustible are:
1. Carbon
2. Hydrogen
3. Oxygen
4. Sulphur
5. Nitrogen
6. Moisture
7. Ash
Select one:
A. 2, 3, 4
B. 1, 2, 4
C. 1, 2, 3
D. 2, 4, 6
E. 3, 4, 7
B. 1, 2, 4
If the combustion is incomplete the sulphur will combine with the oxygen to produce _____ plus heat.
Select one:
A. Sulphur dioxide
B. Sulphur monoxide
C. Carbon monoxide
D. Carbon dioxide
E. Water vapour
B. Sulphur monoxide
One of the general classes of gas burner is the _____ burner.
Select one:
A. Ring
B. Atmospheric
C. Spud
D. Power
E. Premix
E. Premix
The components of fuel oil that are combustible are:
1. Carbon
2. Hydrogen
3. Oxygen
4. Sulphur
5. Nitrogen
6. Ash
Select one:
A. 1, 2, 3
B. 2, 3, 4
C. 1, 2, 4
D. 2, 3, 5
E. 3, 4, 6
C. 1, 2, 4
A U-tube draft gauge is also known as a:
Select one:
A. Viscometer
B. Psychrometer
C. Manometer
D. Pressure gauge
E. Thermometer
C. Manometer
An advantage of a refractory burner is:
Select one:
A. The metal burner parts are exposed to high temperatures
B. The gas and air mixture is not preheated before it enters the furnace
C. Its higher cost
D. It is a more complex design
E. The short luminous flame spreads over a large cross-section of the furnace resulting in high radiant heat transfer
E. The short luminous flame spreads over a large cross-section of the furnace resulting in high radiant heat transfer
Fuel oils have an advantage over coal as a boiler fuel in that:
Select one:
A. It burns more cleanly (less residuals)
B. More handling equipment and labour is required
C. Oil is more expensive than coal
D. The amount fed to the furnace is more difficult to control
E. More storage space is required
A. It burns more cleanly (less residuals)
The air atomizing burner uses compressed air at about 100 kPa (15 psi) as atomizing air also called _____ air.
Select one:
A. Over fire
B. Tertiary
C. Primary
D. Combustion
E. Secondary
C. Primary
A disadvantage of a refractory burner is:
Select one:
A. The short luminous flame spreads over a large cross-section of the furnace resulting in high radiant heat transfer
B. Its higher cost
C. The metal burner parts are exposed to high temperatures
D. It is a simple design
E. The gas and air mixture is thoroughly preheated before it enters the furnace
B. Its higher cost
In buildings the fuels that are widely used are:
1. Oil
2. Coal
3. Natural gas
4. Hog fuel
5. Garbage
Select one:
A. 2, 4
B. 2, 3, 5
C. 1, 2
D. 1, 2, 3
E. 1, 3
E. 1, 3
The average heating value of Butane is:
Select one:
A. 25 600 kJ/kg (11,000 Btu/lb)
B. 37,260 kJ/m³ (1,000 Btu/ft³)
C. 93,150 kJ/m³ (2,500 Btu/ft³)
D. 122,200 kJ/m³ (3,280 Btu/ft³)
E. 45,360 kJ/kg (19,500 Btu/lb)
D. 122,200 kJ/m³ (3,280 Btu/ft³)
A chimney is necessary to:
Select one:
A. Decrease combustion temperatures
B. Decrease combustion air flow
C. Disperse pollutants over a wider area
D. Increase combustion temperatures
E. To increase the concentration of pollutants
C. Disperse pollutants over a wider area
An important factor applicable to automatic fuel valves is:
Select one:
A. Negative shutoff
B. Positive opening
C. Positive shutoff
D. Slow closing
E. Fast opening
C. Positive shutoff
