Q. Coefficient of storage (A) has the dimensions of _____

View solution

Q. The units of specific capacity of a well are _____

View solution

Q. Specific yield for an unconfined aquifer is ________________

View solution

Q. A perched aquifer is found within ____________

View solution

Q. The specific capacity of a confined well under equilibrium condition and within the working limits of drawdown ______________

View solution

Q. The standard specific capacity of a well is the well-discharge per unit of drawdown. This value of discharge should be obtained at ________

View solution

Q. An example of aquitard stratum in the ground profile is a layer of ___________

View solution

Q. An aquifer which is confined at its bottom but not at the top is called ___________

View solution

Q. The clogging of well screens and consequent reduction in pump efficiency is indicated by _____________

View solution

Q. The rate of water contribution to the well increases with the increase in the depression head.

View solution

Q. The performance of a well is measured by its ________

View solution

Q. The safe depression head for open wells is generally taken to be x times the critical depression head when x is ______

View solution

Q. The yield of a well depends on ________________

View solution

Q. Which type of open well is suitable when the sub-soil is formed of gravel or coarse sand deposits?

View solution

Q. Depending upon the type of sub-soil formation, the construction of well is done in two ways i.e. Dug wells and Sunk wells. Dug wells are constructed in soft formations.

View solution

Q. A well 3 meters in diameter has its normal water level 3 meters below the ground level. By pumping water level in the well is depressed to 10 meters below the ground level. In 4 hours the water rises by 5 meters. Calculate the specific yield of the well.

View solution

Q. An open well is called shallow well when ____________

View solution

Q. Open well has big diameter than tube well because ____________

i. Open well has to irrigate more area.
ii. Water contribution to the well is natural and therefore, the percolation area has to be more.
iii. Storage of water has to be made before irrigation is done.

View solution

Q. If the sub-soil formation is of fine sand, the rough value of the specific yield of well per unit area of the well (K/A) given by Marriot is ____________

View solution

Q. Which of the following method of lifting water is very suitable when the depth of well is from 12 to 20 meters?

View solution