Hydrogeology Questions and Answers
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Questions and Answers Papers on Hydrogeology
1. Hardness in water is typically caused by the presence of:
(1) Total dissolved solids (TDS)
(2) Carbonate and bicarbonate
(3) Calcium and magnesium ions
(4) Phosphate
2. With in the lithosphere water is found in the form of :
(1) Liquid state only
(2) Solid state only
(3) Vapours state only
(4) Both liquid and solid state
3. Of the total water available on the earth the percentage of saline water in the ocean is :
(1) 90%
(2) 95.5%
(3) 92.5%
(4) 97.2%
4. Which of the following reserves contains the most water ?
(1) Atmosphere
(2) Biosphere
(3) Ground Water
(4) Lakes
5. How much of the earth’s water is stored in underground aquifer ?
(1) Less than 1%
(2) About 5%
(3) About 10%
(4) About 20%
6. Subject deals specially with the geological aspects of ground water and surface water bodies with regards to their occurrence and movement through different types of rocks called
(1) Engineering Geology
(2) Geohydrology
(3) Geophysics
(4) Geochemistry
7. Term given to the substract of percentage of evaporation of water from the hydrosphere, its precipitation in form of rain and snow and back to the lakes, sea and ocean called
(1) Water cycle
(2) Atmosphere cycle
(3) Geological cycle
(4) None of these
8. The water that have infiltration in to the earth called ?
(1) Surface water
(2) Sub Surface water
(3) Run Off Water
(4) Stream
9. The graphic change in flow of water or in eleveation of water level, against time known as
(1) Hydrograph
(2) Isolevels
(3) Isoheights
(4) Water Contour
10. The maximum amount of capillary water remaining in the soil after removal of gravitational water is called
(1) Available water
(2) Field capacity
(3) Wilting Point
(4) Gravitational Capacity
11. Factors which are influencing wilting point
(1) Soil type and Volume
(2) Plant type and age of plant
(3) Soil type and plant type
(4) Soil type and volume, plant type and age
12. The ratio of water which can be drained freely from the material to the volume of the material is known as
(1) Specific Retention
(2) Specific Yield
(3) Porosity
(4) Permeability
13. What is the process by which water enter the small pore space between particles in soil and rocks ?
(1) Transpiration
(2) Infiltration
(3) Precipitation
(4) Sublimation
14. The percentage of a rocks total volume that is-taken up by pore spaces is called
(1) Permeability
(2) Recharge
(3) Aquifer
(4) Porosity
15. The ground water reservoirs have
(1) Low permeability low porosity
(2) Low permeability and high porosity
(3) High permeability and high porosity
(4) High permeability and high porosity
16. The ability of an earth material to transmit the water is measure of its
(1) Porosity
(2) Chemical cement
(3) Aquifer Characteristics
(4) Permeability
17. Stalactites and stalagmites in caves are composed of
(1) Quartz
(2) Alkali Feldspar
(3) Silica
(4) Calcite
18. With respect to the Earth’s land surface, which of the following expressions is correct ?
(1) Precipitation = evaporation — runoff
(2) Precipitation = runoff — evaporation
(3) Precipitation = evaporation + runoff
(4) Precipitation = evaporation X runoff
19. A geological formation which can only store water but can not transmit significant amount of water called
(1) Aquifer
(2) Aquifuse
(3) Aquiclude
(4) Aquitard
20. Water which is resultant from geological activities like compaction and metamorphism called
(1) Connet water
(2) Rejuvianated water
(3) Volcanic water
(4) Magmic Water
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21. Vadose zone is also called
(1) Zone of aeration
(2) Zone of saturation
(3) Perched water zone
(4) None of the above
22. Which one is known as fossil water
(1) Juvenile water
(2) Cosmic water
(3) Connate water
(4) Meteoric water
23. Zone of saturation is also known as
(1) Vadose Zone
(2) Capillary Zone
(3) Aeration Zone
(4) Phreatic Zone
24. A Geological formation with no interconnected pores and hence can neither absorb nortrasmit the water called
(1) Aquitard
(2) Aquiclude
(3) Aquifuse
(4) Aquifer
25. At all the points on the water table the pressure is
(1) Hydrostatic
(2) Atmospheric
(3) Capillary
(4) Combination of hydrostatic and atmospheric
26. Hydraulic conductivity of a rock is expressive of its
(1) Permeability
(2) Porosity
(3) Water retention capacity
(4) Above all
27. The zone which is found below the water table is known as
(1) Zone of aeration
(2) Zone of saturation
(3) Capillary zone
(4) Vadose zone
28. Deeply confined aquifers can be recharged by means of
(1) Water spreading
(2) Induced Recharge
(3) Pits and shafts
(4) Inverted wells
29. Majority of aquifers consist of
(1) Sand stone
(2) Limestone
(3) Sand and Gravels
(4) Rhyolttes
30. Methods of drilling by rotation of drill roads with use of drilling fluid (Water mixed with Bentonite) called
(1) Auger Drilling
(2) Pneumatic drilling
(3) Rotary drilling
(4) Above all
31. Main part of drilling machine which is used for drilling purposes called
(1) Drill Bit
(2) Casing pipe
(3) Perforated pipe
(4) Gravel
32. Electric Sounding surveys give information about
(1) Lateral variation
(2) Vertical variation
(3) Both lateral and vertical variation
(4) Above all
33. Well effectiveness is high if
(1) Specific capacity is high
(2) Well loss is negligible
(3) Drawdown is negligible
(4) Formation loss is negligible
34. Drilling bit having three toothed wheels are used in rotary drilled called
(1) Tungeston carbite bit
(2) Pilot bit
(3) Rock roller bit
(4) Diamond bit
35. Strata which is capable to absorb the water and from which it is feasible to get sufficient / optimum yield
(1) Aquifer
(2) Aquitard
(3) Aquiclude
(4) Aquifer
36. When the aquifer is heterogeneous the screen pipe should be installed at
(1) In the most permeable portion of the aquifer
(2) Throughout the aquifer
(3) In the upper portion of the aquifer
(4) In the lower portion of the aquifer
37. Perched water table commonly seen in Indira Gandhi Command area at
(1) Ganganagar dist.
(2) Barmer dist.
(3) Jodhpur dist.
(4) Churn dist.
38. The production capacity of a well is rated by its
(1) Well loss
(2) Thickness of aquifer
(3) Permeability of the aquifer
(4) Specific capacity
39. The water from the gravitational ground water mainly depends upon the character of rocks
(1) Rock type
(2) Permeability
(3) Soil thickness
(4) Strata thickness
40. S.A-R. stands for :
(1) Soil Alkalnity Ratio
(2) Soil And Recharge
(3) Sodium Absorption Ratio
(4) Above all
41. The main ground water aquifer of Jaipur district is
(1) Granite
(2) Basalt
(3) Older alluvium
(4) Dykes
42. Potable ground water mostly found in the formation in Jodhpur dist.
(1) Quartzite
(2) Rhyolite
(3) Granite
(4) Sandstone
43. Potable ground water found in Bikaner dist.
(1) Tertiary Sandstone
(2) Bailara Limestone
(3) Tertiary Clay
(4) Above all
44. The salasar village of churu distt is famous for Hanuman temple having the hydrogeological formation is
(1) Sandstone
(2) Limestone
(3) Quartzite
(4) Granite / Rhyolite
45. Specific yield of a material is always
(1) Equal to the porosity
(2) Less than the Porosity
(3) More than porosity
(4) None of these
46. Porosity is
(1) Equal to the specific retention
(2) Equal to specific yield
(3) Equal to the sum of specific retention and specific yield
(4) Less than the specific yield
47. Ratio of the interconnected pore spaces to the total bulk volume of rock is called
(1) Effective porosity
(2) Total porosity
(3) Specific yield
(4) Specific retention
48. In an aquifer the porosity varies
(1) Vertically only
(2) Laterally only
(3) Both vertically and laterally
(4) None of these
49. Permeability of a material is measure of
(1) Voids available in the material
(2) Voids and solid particles available in the material
(3) Its capacity to retain water in the material
(4) its capacity to transmit water through interstices
50. In the Deccan traps the columnar Joints and vesicular may be classified as
(1) Primary porosity
(2) Secondary porosity
(3) Both primary and Secondary porosity
(4) None of these