_______ occurs due to various reasons such as unequal distribution of load on the foundations, varying bearing power of the sub soil, eccentricity of the load, etc.

To avoid __________ the foundations should be taken beyond the depth up to which rainwater can not reach.

Due to the ____________ the roots of trees planted near a building may extend upto the foundation level and may absorb the moisture.

The proper watering or curing for a period of at least 10 days should be done to the masonry work in case of ________.

__________ is the simplest form of cofferdam.

________ type of cofferdam is economical at places where rock is available in plenty.

__________ it suitable when available working space is limited and the area to be enclosed is small.

When the area to be enclosed is large, it becomes essential to provide the _________ construction so as to give stability to the cofferdam.

__________ is useful when depth of water is about 6 metres to 10 meters.

The ___________ is made of steel sheet piles and this type of cofferdam is proved successful in unwatering large areas.