The type of valve which allows water to flow in one direction but prevents its flow in the reverse direction is____________________?

Related Mcqs:

The most common cause of acidity in water is_______________?

A. carbon dioxide B. oxygen C. hydrogen D. nitrogen...

The rate of Alteration of pressure filters is_________________?

A. less than that of slow sand filters B. in between the filtration rate of slow sand filters and rapid sand filters C. greater than that of rapid sand filters D. equal to that of slow sand filters...

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...

When there is no recirculation of sewage, then recirculation factor is_______________?

A. 0 B. 1 C. infinity D. none of the above...

The layout of distribution system in which water flows towards the outer periphery is_________________?

A. ring system B. dead end system C. radial system D. grid iron system...