第一章 单元测试

1、 问题:The challenges of urban water resources include ( ).
选项：
A:Urban water distribution renders large energy consumption.
B:Capital and operational costs of water supply for long distance transportation are high.
C:High risk of urban water pollution.
D:The standards of urban water quality are high due to the increasing concerns about the safety of urban water sources.
答案: 【
Urban water distribution renders large energy consumption.
Capital and operational costs of water supply for long distance transportation are high.
High risk of urban water pollution.
The standards of urban water quality are high due to the increasing concerns about the safety of urban water sources.
】

2、 问题:

It is relatively hard to separate salt from water, because ions such as Ca2+，Mg2+，K+ are tightly surrounded by water molecules. 

选项：
A:对
B:错
答案: 【
对
】

3、 问题:Lakes and reservoir waters usually have low water mobility, high turbidity, and relatively stable water quality. ( )
选项：
A:对
B:错
答案: 【
错
】

4、 问题:Heavy metals can be concentrated in plant roots or aquatic animals, causing great danger to living organisms. ( )
选项：
A:对
B:错
答案: 【
对
】

5、 问题:In the US, different sewage plants follow the same discharge standards. ( )
选项：
A:对
B:错
答案: 【
错
】

第二章 单元测试

1、 问题:Increasing ionic strength would compress the electric double layer and increase the stability of the colloid. ( )
选项：
A:对
B:错
答案: 【
错
】

2、 问题:G value and GT value are employed to design coagulation tanks, because they can describe the coagulation process comprehensively. ( )
选项：
A:对
B:错
答案: 【
错
】

3、 问题:The hydraulic condition of the rotary baffle plate flocculation tank is better than that of the reciprocating type, and head loss of the rotary type is 40% less than that of the reciprocating type. ( )
选项：
A:对
B:错
答案: 【
对
】

4、 问题:

There are many ways for the control of coagulant dosage and automatic detection, including ( ).

选项：
A:establishing a mathematical model according to the quantity and quality of raw water
B:streaming current detector (SCD)
C:dosing according to experience
D:light transmission pulsation detector
答案: 【
establishing a mathematical model according to the quantity and quality of raw water
streaming current detector (SCD)
light transmission pulsation detector
】

5、 问题:

Which one below belongs to organic coagulant ( ).

选项：
A:polyacrylamide (PAM)
B:aluminum sulfate
C:lime glue
D:poly aluminum chloride (PAC)
答案: 【
polyacrylamide (PAM)
】

第三章 单元测试

1、 问题:Which of the following measure could not improve the settling efficiency in sedimentation tank? ( )
选项：
A:To recycle the sludge to improve the size of particles
B:To increase the surface area of the tank
C:To increase the flow rate
D:To improve the performance of flocculation before sedimentation
答案: 【
To increase the flow rate
】

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