【 Weak current College 】 heating and gas supply---this Chapter exercises

First, multiple choice questions (alternate answer each question, only one adresses. ）
1. press the supply and return water dry pipe layout location and direction of water supply can be divided into different also () and the following eturn several ways.
A £ ® for the last time, for next time
B £ ® for the last time, for the last time
C £ ® for the last time, for next time
D £ ® for next time, for next time
　　　
2. the production of hot water boilers, hot water temperature is above () is called a high-pressure boiler.
A．70℃
B．115℃
C．200℃
D．250℃
　　 　
3. steam boiler, the steam pressure of greater than () is called a high-pressure boiler.
A．50kPa
B．70kPa
C．115kPa
D．150kPa
　　 　
4. the pressure of high-pressure gas pipeline network is ().
A．4.9kPa＜P≤147.15kPa
B．147.15kPa＜P≤294.3kPa
C．294.3kPa＜P≤784.8kPa
D．784.8kPa＜P≤985.6kPa
　　 　
5. steel bottle of liquid petroleum gas saturated vapor pressure in absolute pressure calculation is ().
A．70～800kPa
B．80～800kPa
C．90～800kPa
D．100～800kPa
2. fill in the blanks questions (please toyoko line on enter your answer. 1. the heating system) from, and three main parts.
2. the heating system to classify as htm have heating, heating, heating.
3. the heating system by the different scope consists of a heating system, heating system and heating system.
4. the heatsink is heating system heat load device that transfers (hot water or steam) carried by heat transfer to the purpose of, achieving the heating.
5. press the working principle of the heat exchanger can be divided into the heat exchanger, heat exchangers and heat exchanger.
6. radiator usually have, and steel convection radiator series tablets.
7. the heating system management including management, administration and management.
8. type of heating boilers and two categories.
9. the commonly used heat source equipment mainly and two.
10. gas into, and three.
11. city gas supply is divided into and two. Third, the noun parser (in the the nouns in the text box below, enter your answer. 1. the heating system)
　　　 　
2. htm
　　　 　
3. thermal equipment
　　　 　
4. liquefied petroleum gas (LPG)
　　　 　
5. natural gas
IV. question
1. vertical hot water heating system piping layout what specific forms of? 【 answer points 】--------------------------------------------------------------------------------
Vertical hot water heating system is the vertical position of the same individual radiator connections with risers. By radiator and risers of connection methods can be divided into single-pipe system and two-pipe system for two; press, backwater dry pipe layout location and direction of water supply can be divided into different also for next, next, on to the next and the following eturn several ways.
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2. horizontal hot water heating system piping layout what specific forms of? level system and vertical system advantages compared to what? 【 answer points 】--------------------------------------------------------------------------------
Horizontal hot water heating system refers to the same horizontal position (same floor) of each radiator with a horizontal pipe connections. It can be divided into sequential and spanning two ways. Sequential advantage is structure is relatively simple, low cost, but the heat sink is not a separate regulation; spanning the radiator can be adjusted independently, but the cost is high, and lower the heat transfer coefficient.
Horizontal system compared with the vertical system has the following advantages: ① construct simple, economic good;
② pipeline are simple, not through the floor of the risers, construction convenient;
③ horizontal pipes can be laid in ceiling or trench for concealed;
④ facilitate tiered management and tuning. But how horizontal system exhaust than vertical system complexities, it needs to be set on the heat sink cooling air valve dispersion exhaust, or in-floor heat sink threaded a centralized exhaust air pipe. --------------------------------------------------------------------------------

3. steam heating system, what are the characteristics? 【 answer points 】--------------------------------------------------------------------------------
Steam heating system by steam pressure of high-pressure and low-pressure is divided into two types.
Steam heating system's features are: ① steam heating system of the radiator surface temperature is high;
② steam heating system than machinery circulation of hot water heating system energy savings;
③ steam heating system of small thermal inertia;
④ high pressure steam heating systems cut tubing;
⑤ steam heating system for high-rise buildings;
⑥ steam heating system thermal losses;
⑦ steam heating return pipe life short. --------------------------------------------------------------------------------

4.供暖系统的管理包括哪些方面？【答题要点】 --------------------------------------------------------------------------------
Heating system management including heat management, network management and user management.
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5. Please describe the heating system works. 【 Answer points 】
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Low temperature heat source htm is heated and absorption in the heat, becomes a high-temperature thermal (hot water or steam), via pipeline to the Interior, through emitting radiator equipment heat indoor temperature; temperature decrease after heat into low-temperature thermal (cold water), and then through the return line returns the heat source, for recycling. So continuous loop, thus continuously transfers heat from the heat source to the Interior, to complement the Interior heat loss, to maintain a certain temperature indoors.