The working chamber of pneumatic caissons are kept airtight because ____

Which of the following caissons, permits excavation in dry?

When a rigid well starts moving parallel, it transforms the soil in to ______

To avoid the setting of the cutting edge unevenly, _______ can be introduced.

The cutting edge should be provided with an angle of ______

For alluvial soil, the normal scour depth can be calculated by _______ formula.

According to Terzaghi and Peck, the ultimate bearing capacity can be determined by which of the following expression?

The choice of a particular shape for a well depends on ____