1. : The science that deals with occurrence, movement, and distribution of groundwater is called:
(A) Hydrogeology
(B) Hydraulics
(C) Groundwater mechanics
(D) Water resources engineering
2. : The zone between the land surface and water table containing both air and water is called:
(A) Vadose zone
(B) Saturated zone
(C) Aquifer zone
(D) Capillary fringe
3. : The water table fluctuates mainly due to:
(A) Groundwater pumping and recharge
(B) Atmospheric pressure
(C) Soil color
(D) Latitude and longitude
4. : The surface below which all soil pores are filled with water is:
(A) Aeration zone
(B) Capillary zone
(C) Water table
(D) Vadose zone
5. : The term aquiclude refers to:
(A) A water-bearing formation
(B) A formation impermeable to water
(C) A formation allowing very slow water movement
(D) A zone of soil moisture storage
6. : An aquifer having its upper surface as the water table is called:
(A) Perched aquifer
(B) Confined aquifer
(C) Unconfined aquifer
(D) Artesian aquifer
7. : The property of an aquifer to transmit water is measured by:
(A) Specific retention
(B) Transmissivity
(C) Specific storage
(D) Porosity
8. : Hydraulic conductivity of soil depends mainly on:
(A) Soil texture and pore size distribution
(B) Crop type
(C) Evapotranspiration
(D) Fertilizer use
9. : Specific yield of an aquifer is defined as:
(A) Ratio of void volume to total volume
(B) Volume of water drained by gravity per unit volume of aquifer
(C) Water held by soil against gravity
(D) Total porosity
10. : The sum of specific yield and specific retention of soil is equal to:
(A) Hydraulic conductivity
(B) Porosity
(C) Storage coefficient
(D) Transmissivity
11. : A perched aquifer is separated from the main water table by:
(A) Recharge basin
(B) Local impervious layer
(C) Capillary fringe
(D) Artesian pressure
12. : Groundwater recharge mainly occurs through:
(A) Precipitation infiltration
(B) Evaporation
(C) Runoff only
(D) Capillary rise
13. : The safe yield of an aquifer is defined as:
(A) Maximum groundwater extraction without causing long-term decline
(B) Maximum pumping capacity of a well
(C) Total storage of aquifer
(D) Rate of infiltration during rainfall
14. : Darcy’s law is valid for:
(A) Laminar flow in porous media
(B) Turbulent flow in porous media
(C) Both laminar and turbulent flow
(D) Free surface flow only
15. : The hydraulic gradient is defined as:
(A) Head loss per unit length of flow
(B) Flow velocity
(C) Ratio of discharge to cross-sectional area
(D) Depth of aquifer
16. : A flowing artesian well occurs when:
(A) Piezometric surface is above ground level
(B) Water table is deep below ground
(C) Aquifer is unconfined
(D) Pumping exceeds recharge
17. : The specific storage of a confined aquifer is:
(A) Volume of water released per unit volume of aquifer per unit decline in head
(B) Total porosity of aquifer
(C) Water drained by gravity
(D) Depth of aquifer × porosity
18. : The effective porosity of a formation is equal to:
(A) Total porosity – Specific retention
(B) Specific yield
(C) Gravity-drained porosity
(D) All of the above
19. : The water balance equation for groundwater hydrology is:
(A) Recharge – Discharge = Storage change
(B) Runoff + Evaporation = Rainfall
(C) Pumping + Recharge = Zero
(D) Porosity × Thickness = Storage
20. : The zone where groundwater moves by gravity through pore spaces is called:
(A) Vadose zone
(B) Zone of saturation
(C) Capillary fringe
(D) Root zone
21. : The rate of vertical movement of water through soil is termed as:
(A) Infiltration rate
(B) Percolation rate
(C) Capillary rise
(D) Seepage velocity
22. : A cone of depression around a pumping well is caused by:
(A) Groundwater recharge
(B) Lowering of water table due to pumping
(C) Artesian pressure
(D) Perched aquifer
23. : The governing equation for steady radial flow into a well in a confined aquifer is given by:
(A) Thiem’s equation
(B) Darcy–Weisbach equation
(C) Bernoulli’s equation
(D) Manning’s equation
24. : The process of groundwater moving upward into the root zone due to surface evaporation is called:
(A) Capillary rise
(B) Recharge
(C) Percolation
(D) Transpiration
25. : The main environmental problem due to over-exploitation of groundwater is:
(A) Soil salinity and land subsidence
(B) Increased rainfall
(C) Reduced evaporation
(D) Increased aquifer recharge