A. directly proportional to BOD satisfied
B. directly proportional to BOD remain-ing
C. inversely proportional to BOD satisfied
D. inversely proportional to BOD re-maining
Related Mcqs:
- In a BOD test, 1.0 ml of raw sewage was diluted to 100 ml and the dissolved oxygen concentration of diluted sample at the beginning was 6 ppm and it was 4 ppm at the end of 5 day incubation at 20°C. The BOD of raw sewage will be___________?
A. 100 ppm
B. 200 ppm
C. 300 ppm
D. 400 ppm - The ratio of 5 day BOD to ultimate BOD is about_______________?
A. 1/3
B. 2/3
C. 3/4
D. 1.0 - If Biochemical oxygen demand (BOD. of a town is 20000 kg/day and BOD per capita per day is 0.05 kg, then population equivalent of town is_________________?
A. 1000
B. 4000
C. 100000
D. 400000 - Standard BOD is measured at________________?
A. 20°C – 1day
B. 25°C- 3day
C. 20°C – 5day
D. 30°C- 5day - The relative stability of a sewage sample, whose dissolved oxygen is same as the total oxygen required to satisfy BOD, is______________?
A. 1
B. 100
C. infinite
D. zero - The maximum efficiency of BOD removal is achieved in______________?
A. oxidation pond
B. oxidation ditch
C. aerated lagoons
D. trickling filters - The correct relation between theoretical oxygen demand (TOD), Biochemical oxygen demand (BOD) and Chemical oxygen demand (COD) is given by_______________?
A. TOD>BOD>COD
B. TOD>COD>BOD
C. BOD>COD>TOD
D. COD>BOD>TOD - The effect of increasing diameter of sewer on the self cleansing velocity is_____________?
A. to decrease it
B. to increase it
C. fluctuating
D. nil - The type of sewer which is suitable for both combined and separate system is_____________?
A. circular sewer
B. egg shaped sewer
C. horse-shoe type sewer
D. semi-elliptical sewer - If the coliform bacteria is present in a sample of water, then the coliform test to be conducted is_____________?
1) presumptive coliform test
2) confirmed coliform test
3) completed coliform test
The correct answer is ?A. only (1)
B. both (1) and (2)
C. both (1) and (3)
D. all (1), (2) and (3)
