In hand operated rings in ‘auger and shell boring’ the depth of which it can be used is _____

In site exploration, depth up to which the increase in pressure is likely to cause shear failure is known as _______

In a blind zone, the geophone cannot detect the seisdmic refraction.

The inside clearance of the sampler is ____

Auger is suitable for ___

In detailed exploration, the field test is conducted to determine ____

In the seismic refraction method, the waves sent along the ground surface is picked by _____

When deeper layers have increasingly greater density, the seismic refraction method is fast.