电厂锅炉及设备(Power plant boiler and equipment)
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电厂锅炉及设备（Power plant boiler and equipment）
The first chapter
Read [242] times altogether
1. According to boiler capacity: De = 670t/h boiler for which model ()
A. large b. medium c. small d. large
Answer: B
2. According to the steam parameters: the pressure type of the boiler under p = 20 MPa is ()
A. high pressure b. high pressure c. subcritical d. supercritical
Answer: C
3. According to the cycle of work quality: what type of boiler is always 1 for the loop ratio?
A. Direct current boiler
B. Natural circulation boiler
C. Forced circulation furnace
D. Compound circulating furnace
Answer: A,
4. Which of the following devices does not belong to the heating surface ()
A. Air preheater
B. Economizer
C. Reheater
D. Drum or soda separator
Answer: D
5. The main form of boilers for large coal-fired power plants is ()
A. floor combustion furnace c. cyclone furnace d. fluidized bed boiler
Answer: B
6. Continuous operation hours refers to ()
A. the number of hours of operation of the boiler when it is finished in the first stop
C. the number of hours of operation between the two accidents
Answer: D
7. The power of the dc boiler working cycle is ()
A. The density difference between the downdraft tube and the evaporation tube
C. Pump
D. Circulating pumps and pumps
Answer: C
8. Which of the following devices does not belong to the boiler section ()
A. Steam pack
B. Economizer
C. Air preheater D
Answer: D
9. The three main engines of coal-fired power plants are not included ()
A. coal mill b. steam turbine c. generator d. boiler
Answer: A,
10. In the process of converting the chemical energy of coal into steam, the following system () is not involved.
A. condensate system b. smoke system C. Soda system D. Combustion system
Answer: A,
The second chapter
Read [183] times altogether
Standard coal is used for the fuel of 29310kJ/kg (s)
A. dry basis b. dry basis d. air drying base
Answer: B
2. Commonly used to indicate the analysis of the volatile content of coal is ().
A. dry basis b. dry basis d. air drying base
Answer: C
3. The melting properties of gray are generally represented by ()
A. deformation temperature b. softening temperature c. flow temperature d. melting temperature
Answer: B
4. Which of the following coal has the highest volatile content ()
A. Anthracite
B. Poor coal
C. Lignite
D. Bituminous coal
Answer: C
5. Which of the following coal has the highest carbon content ()
A. anthracite b. poor coal c. brown coal d. coal
Answer: A,
6. The composition of coal is not a harmful component or element