Science True False[1 Marks ]

Cooking oil, fats should not be thrown in the drainage system directly. True/ False.

Wastewater is transparent, colourless, odourless. True/ False.

Public places such as railway stations, bus depots, airports and hospitals generate a lot of waste, which leads to diseases. True/ False.

Aerobic bacteria produces biogas sludge in the digester tank. True/ False.

Saprotrophic bacteria feed on dead organisms. True/ False.

Onsite sewage disposal systems collect human excreta and store it in a hole or a pipe, and later direct it to a sewage treatment plant. True/ False.

Poor sanitation and contaminated drinking water is the cause of a large number of diseases. True/ False.

Tuberculosis is a water-borne disease. True/ False.

Septic tanks are not suitable for places such as hospitals, isolated buildings and clusters of houses where there is no sewage. True/ False.

Urea is an inorganic impurity present in sewage. True/ False.

Wastewater could be reused. True/ False.

Sewage contains disease-causing bacteria. True/ False.

We should not defecate is open because untreated human waste is a health hazard. True/ False.

Microorganisms are present in the domestic waste also. True/ False.

Used water is wastewater. True/ False.