英语新版 在线考试 答题题目
1、 Which refrigeration systems are the most commonly used?
2、 Which one can't be used as media for transferring energy from the air conditioning plant to the conditioned space?
3、 Which system is described in detail here?
4、 The supply air conditions are controlled by .
5、 The system by means of mechanical way(fan)can be divided into .
6、 In the heating area,the entry of fresh air should be installed which is linked with the fan to protect heater.
7、 When the density of emission pollutants is and indoor sensible heat is not enough to form a stable updraft throughout the year,it had better set upper and lower air outlet with the lower exhaust 2/3 total air volume and the upper exhaust 1/3 total air volume,and air changes should not be less than times per hour.
8、 The general exhaust system can be made of .
9、 Which single capacity centrifugal chillers are suitable for?
10、 Which of the following statement is true?
11、 Centrifugal compressors are subjected to less vibration and noise steady-flow because of
12、 Which one can't be found out from performance characteristics figure?
13、 Which of the following statement is true?
14、 Which of the following statement is true?
15、 Where is refrigeration effect obtained?
16、（多选题） The two differrences between Carnot refrigeration cycle and theoretical cycle are .
17、 In the pressure-enthalpy diagram of theoretical cycle,the throttling process line is
18、 Which of the following statement is not true?
19、 Heating section is made up of .
20、 The expenses and performance of play an important role in solar heat engineering.
21、 Form Fourier s experimental _____is true
22、 if more than _____person have related SBS in this building it is considered that the building is sick building
23、 the tempuurature of floor surface is_______in long-term residence
24、 The insulating material is able to ______heat loss
25、 is used in solar assisted heat pump system.
26、 For a blak surface, .
27、 For higher temperature systems, is not allowed.
28、 When the boundaries of a system are such that it cannot exchange matter with the surroundings,the system is said to be .
29、 is the energy possessed by a system caused by the motion of the molecules and/or intermolecular forces.
30、 The following statements are false except .
31、 Heat is when energy is added to the system.
32、 Fluids differ from solids in their reaction to .
33、 is not fluid.
34、 The absolute viscosity or dynamic viscosity of the fluid is .
35、 is true for the incompressible pipeline flow.
36、 The central source or production plant may be .
37、 These networks require permission and coordination for right-of-way of the system.
38、 The temperature drop at the consumer end should be as as possible.
39、 The following statements are false except .
40、 is defined as a region in space or a quantity of matter bounded by a closed surface.
41、 When metal ceiling panels are applied for heating only, may be required,depending on local codes.
42、 Panel design requires determining .
43、 Metal ceiling panels can be integrated into a system that heats and cools.In such a system,a source of dehumidified ventilation air is required in summer,so the system is classed as
44、 The following statements are false except .
45、 Hydronic ceiling panels have a thermal resistance and respond quickly to changes in space conditions.
46、 Condensing boilers are typically made of stainless steel or aluminum because copper, cast-iron,and carbon steel will corrode because of .
47、 Boilers may be grouped into classes based on .
48、 Operating and safety controls and relief valves,which limit temperature and pressure, are ancillary devices required to protect the boiler from .
49、 The following statements are false except
50、 Cast-iron sectional boilers are constructed of individually cast sections,assembled into blocks(assemblies)of sections.The number of sections assembled determines .
51、 Air conditioning involves .
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