A: bar screen
B: grit settling tank
C: activated sludge tank
D: chlorination
E: ultra violet light array
举一反三
- Which of the following measure could not improve the settling efficiency in sedimentation tank？ （ ）。 A: To increase the surface area of the tank B: To increase the flow rate C: To improve the performance of flocculation before sedimentation D: To recycle the sludge to improve the size of particles
- For large two-stroke diesel engine, the lubricating oil required for cross head bearing lubrication comes from the_____. A: settling tank B: lubricating oil circulation tank C: Wet sump D: Daily service tank
- Which of the following is not a vehicle brand? A: Benz B: Ferrari C: Jaguar D: Tank
- Particle's settling efficiency is related to _____ in ideal settling tank. A: water depth B: tank length C: surface load D: horizontal flow velocity E: settling time
- Which of the following statements describes the function of an expansion tank in a diesel engine cooling system?（）
内容
- 0
Which of the following operation is correct?______. A: After being treated in the bio-filter tank, the sewage is discharged overboard B: After going through the biological film, the sewage is discharged overboard C: The sewage treated in the bio-filter tank flows into the sterilization compartment D: The sewage is first collected in sterilization tank then discharged into the bio-filter tank.
- 1
The expansion tank for a diesel engine closed cooling system is designed to maintain a constant head on the system and （）.
- 2
Frames to which the tank top and bottom shell are fastened are called（）.
- 3
Biological sewage treatment plant work on the ______.: aeration process|centrifuging process|heating process|settling process
- 4
Which of the following is not the main abiotic factor affecting plant growth and development？ A: Water B: Temperature C: Light D: Insects