BT503 Quiz 2 Lectures 120-140 87 MCQs

MUHAMMAD IMRAN · BT503 Environment Biotechnology · LESSON 120-140 · QUIZ NO 02 87 MCQs

1. ……..techniques are best suited to instances of relatively localized pollution within a site, typically in ‘hot-spots’ of medium to relatively high concentration ______________________________________________________________________Ex situ
2. Which of the following method affects the reproduction of the pathogenic agents______________________ UV radiation
3. A sludge with a level of dry solids of 2% has a water content of ___________________________________________________98%.
4. Cropping accumulater of heavy metal plants occur in ____ technology ____________________Extensive Technology
5. _______ is normally uses high-temperature refuse the contaminated materials________________________Vetrification.
6. Which of following process does not introduce chemical product into the liquid________________________Membranes.
7. Among dewatering processes the process which is least used is called________________________________Stabilization
8. All of these are artificial processes of pathogen removal except___________________________________Land treatment.
9. In situ technique is suitable for_________Contramination_________________________________________________Widespread.

10.

A sludge with a solids load of 120 kgSS/d and a solid concentration of 2.0%n(20.000mg/L) will have a flow of___________________________________________________________________________________________________________6.0 m3/d.

11. Most frequently used unit for concentration of sludge…………__________________________________________________________%.

12.

The main characteristic of______Methodsare that the soil is removed from where it originally lay, for treatment_____________________________________________________________________________________________________ Ex situ.

13.

For preliminary waste water treatment all basic equipment are required except one______________________aerator.

14.

The design of sludge treatment and final disposal stages is based on which of the following________Sludge flow.

15.

Which of the following pathogen removal system does not need chemicals__________________Maturation ponds.

16.

________ are well suited to large scale treatment where speed is not of the essence_Extensive technologies.

17.

Capillary water maintain it self absorbed in which of the following phase_____________________________________Solid.

18.

In a dewatering process the dry solid level in the dewaterd sludge of filter press_________________________20-30%.

19.

Facultative pond require how much time for sludge removal from liquid phase_________________________Decades.

20. The process in which decomposition of aerobic organic matter is achieved through control condition of temperature, water content, and nutrients is known as________________________________________________Compositing.

21.

Following Chemicals are added in the sludge preparation process______________________________________________________Coagulants and Polyelectrolytes Both a & c.

22. Soil washing and thermal treatments are example of Technologies ____________________Intensive Technologies.
23. Which of the following is highly recommended system for pathogen removal _______________Maturation Ponds.
24. Which of the following Sludge management stage accomplished through the removal of the biodegradable organic matter of the sludge ____________________________________________________________________________________Stabilization.
25. A very effective method for removal of disease causing organisms is_______________________________Ozonisation.
26. Disposal of sludge in the mining areas is known as ____________________________________________Land reclamation.
27. Stages of sludge processing involve? ________________________________________________________________________ ALL
28. ----technologies have smaller resource requirement and lower initiation, running and support costs. _________________________________________________________________________________________ extensive technologies
29. --------- process is an appropriate method for sludge stabilization in nurseries, horticulture and landscaping.____________________________________________________________________________________________ composting
30. _______ is very effective agent for the removal of pathogens. _______________________________________________ Ozone

31.

of the liquid sludge range between? ________________________________________________________________ 1.02 and 1.03

32. If the sludge is to be incinerated then the following --------process is not necessary. _____________Disinfection
33. Water in the sludge can be classified into how many classes? __________________________________________________ 4
34. In primary treatment system, primary sludge takes how much time for sludge removal from liquid phase?_months
35. Lime stabilization is used to treat______ sludge. ________________________________________________________________ All
36. Which of following process does not introduce chemical products into the liquid.___________________ Membranes
37. In situ technique is suitable for ------------- contamination. _______________________________________ widespread
38. The concentration of solids in sludge is expressed in the form of? ____________________________________ Dry solids
39. ----- metallic coagulants is/are used in conditioning of sludge.________________________________________ both A&B
40. Principle mechanism of influence in the dewatering process is called -------. _____________________Evaporation

41.

For which of the following waste water treatment system the equipment depends on the post treatment process used.____________________________________________________________________________ UASB reactors+ post treatment

42. How much dry solid content is found in hard solid?__________________________________________________ 35% to 60 %
43. In extensive technologies precipitationof metal sulphides takes place under------- conditions.______ anaerobic
44. The sludge production is a function of the waste water treatment system used for the_____________. liquid phase
45. Time required for the accumulation of discarded sludge from WWTPs is--------___._________________3 to 5 years
46. In UASB + polishing pond dry solid level ranges between?___________________________________________________3-4 %
47. The pH of the medium will be ----------when lime is added to the digested sludge, in the sludge disinfection process.________________________________________________________________________________________________________ Basic
48. Among the natural dewatering processes, which is least used are called _____________________ sludge lagoons
49. Cropping of heavy metals accumulators plants occur in _________________________________ Extensive methods
50. ------process is an encapsulation of contaminants within a monolithic solid of high structural integrity, with or

without associated chemical fixation. _________________________________________________ Vitrification

51.

Which basic equipment is required for high rate pond waste water treatment process?____________________________________________________________________________ rotors of liquid movement

52. Gamma radiations are used for____________________________________________________________________. Conditioning
53. The density of the sludge during most of its processing is very close to? ___________________________________Water
54. Density of sludge in processing stages is close to? _____________________________________________1000 kg/m3
55. Adsorbed water in the sludge can be removed by?___________________________________________ flocculating agent
56. Transformation or mineralisation of contaminants to less toxic and more mobile, forms is known as…….. remediation method. ___________________________________________________________________________________Biological
57. Thermal decomposition process by oxidation is known as _______. _________________________________Incineration
58. How much water content is found in fluid sludge? ______________________________________________________100%-75%
59. ------- is the main water removal mechanism in the sludge dewatering…….________________________ Percolation.
60. ..agent/s responsible for land contamination……….._______________________________________________asbestos work

61.

Criteria for management of waste water treatment include……___________________________________________________all

62. - The period required for carry out composition through in vessel biological reactors is normally………__14-21days
63. Normal temperature required in thermopilic aerobic digestion process is………____________________________50-60oC
64. ……..involves the heating of sludge at 70oC for 30 mints. _________________________________________Pasteurisation
65. Free water in the sludge can be removed by….______________________________________________________________gravity
66. ------is an example of thermal remediation method. _______________________________________________Gasification
67. Type of centrifuges mostly used in the dewatering process are called-------. Horizontal-Shaft Centrifuge
68. Toxic by-products can be generated in which of the following system?____________________________ Chlorination
69. For sludge stabilization, chemical stabilization is accompanied by ------of an organic matter._________ Oxidation
70. ____is a land disposal process, in which the organic substrate is biologically degraded in the upper layer of the soil and the inorganic fraction is transformed or fixed into this layer. ____________________________________Land Farming

71.

---the following technologies have high initiation, running and support costs. Intensive technologies

72. How much dry solid content is found in fluid sludge?_____________________________________________________ 0%-25%
73. Thickening in sludge management is removal of --------. __________________________________________________Water
74. - Water in the sludge can be divided into ------- classes. ________________________________________________________4
75. Sludge treatment stages are ---------. __________________________________________________________________________6
76. ---- dewatering can be done by natural or mechanical processes. ________________________________________Sludge
77. Which of following technologies key factors are a fast response and low treatment time are key factors which pertains to ---------. ____________________________________________________________________Intensive technologies
78. Virtification uses ----- temperature to fuse contaminated materials. _________________________________________High
79. In the process of dissolved air flotation release of oxygen in the form of bubbles is known as --------. __________________________________________________________________________________________________ Depressurization
80. A common way in which all form of remediation are often characterized is as -----._________________ Both a & b

81.

---- is used for thickening of sludge. _________________________________________________________________Both b& c

82. -- technologies impose less damage to soil quality. ________________________________Extensive technologies.
83. A process in sludge management for preparation for dewatering is known as ------. _____________Conditioning
84. ------- is the main natural water removal mechanism in the sludge dewatering. ___________________Percolation
85. Which method are costly for removal of disease causing organisms. ___________________________________Artificial
86. Removal of organic matter in sludge management is known as --------.______________________ Mass reduction
87. In sludge processing stages specific gravity is close to -----. __________________________________________________0.1