A. 15 cm and 100 cm
B. 15 cm and 300 cm
C. 30 cm and 450 cm
D. 60 cm and 300cm
Related Mcqs:
- Which of the following sewers is preferred for combined system of sewage ?
A. circular sewer
B. egg shaped sewer
C. rectangular sewer
D. none of the above - The self cleansing velocity for all sewers in India is usually_________________?
A. less than 1.0 m/sec
B. 1.0 m/sec to 1.2 m/sec
C. 1.5 m/sec to 2.0 m/sec
D. 3.0 m/sec to 3.5 m/sec - Laying of sewers is usually done with the help of________________?
A. a theodolite
B. a compass
C. sight rails and boning rods
D. a plane table - Corrosion in concrete sewers is caused by______________?
A. septic conditions
B. dissolved oxygen
C. chlorine
D. nitrogen - The main disadvantage of cement concrete sewers is________________?
A. less strength
B. difficulty in construction
C. difficulty in transportation due to heavy weight
D. less life - A sewer that receives the discharge of a number of house sewers is called________________?
A. house sewer
B. lateral sewer
C. intercepting sewer
D. submain sewer - The minimum dissolved oxygen which should always be present in water in order to save the aquatic life is______________?
A. 1 ppm
B. 4 ppm
C. 10 ppm
D. 40 ppm - The design discharge for the separate sewer system shall be taken as_____________?
A. equal to dry weather flow (DWF)
B. 2xDWF
C. 3 x DWF
D. 6xDWF - The design discharge for the combined sewer system shall be taken as________________?
A. equal to rainfall
B. rainfall + DWF
C. rainfall + 2 DWF
D. rainfall + 6 DWF - The slope of sewer shall be__________________?
A. given in the direction of natural slope of ground
B. given in the direction opposite to natural slope of ground
C. zero
D. steeper than 1 in 20
