Q. The design period of sewage treatment works in normally

View solution

Q. The porosity of sediments in sewer pipes, is usually taken as

View solution

Q. The sewer which received discharge from two or more main sewers, is known as

View solution

Q. A well oxidized sewage contains nitrogen mainly as

View solution

Q. A safety lamp when inserted in the upper portion of a manhole causes flames. It indicates the presence of

View solution

Q. Assertion (A) : A free board of 0.3 m is provided above the top sewage line in septic tanks. Reason (R) : It helps to accommodate the scum in the septic tank.

View solution

Q. Pick up the incorrect statement from the following :

View solution

Q. Pick up the correct statement from the following :

View solution

Q. You are asked to design sewer pipes of diameters 0.4 m to 0.9 m at maximum flow, you will assume the sewer flow running at

View solution

Q. For sewer mains of 0.5 to 1 m diameter, the ratio of maximum daily sewage flow to the average daily sewage flow is assumed

View solution

Q. D is the diameter of a circular sewer and α is the side of a square section sewer. If both are hydraulically equivalent, the relationship which holds good, is

View solution

Q. For detecting the nitrites in the sewage, the matching colour may be developed by adding

View solution

Q. The suitable cross-section of sewers to carry combined flow, is

View solution

Q. If the diameter of a sewer is 100 mm, the gradient required for generating self cleansing velocity, is

View solution

Q. In 1000 kg of sewage, the total solids approximate

View solution

Q. Pathogens (or pathogentic bacterias) in water may cause

View solution

Q. Sewer manholes are generally provided at

View solution

Q. The sewers

View solution

Q. Before discharging the foul sewage into rivers, it is generally treated by

View solution

Q. The settlement of a particle in sedimentation tank, is affected by

View solution