238) In case of foundations on black cotton soils, the most suitable method to increase the bearing capacity of soils is to

239) The type of footing which is used to transmit heavy loads through steel columns is

240) The maximum total settlement for isolated foundations on clayey soils should be limited to

241) The type of pile which is driven at an inclination to resist inclined forces is known as

242) The minimum depth of foundation in clayey soils is