IOCL Earth Science Paper Geology Solved Questions With Answers

IOCL Earth Science Paper Geology Solved Questions With Answers

Hdrogeology Practice Sample Test 

Q.1 A thin continuous water film around soil particles, held at a tension ranging from 1/3 to

31 atmospheres is called as:

a) Hygroscopic water.

b) Capillary water.

c) Gravitational water.

d) Soil water.

ANSWER:(b)

Q.2: Which is the correct sequence of sub-zones in the Vamoose zone from top to bottom?

a) Soil - water zone, Capillary zone and Intermediate Vamoose zone.

b) Intermediate vamoose zone, Soil-water zone and Capillary zone.

c) Soil-water zone, Intermediate Vamoose zone and Capillary zone.

d) Capillary zone, Intermediate vamoose zone and Soil - water zone.

ANSWER:(c)

Q.3: The maximum amount of capillary water remaining in the soil after the removal of

Gravitational water is called its:

a) Available water.

b) Field capacity.

c) Witting point.

d) Gravitational capacity.

ANSWER:(b)

Q.4: The specific yield of a material is always:

a) Equal to the porosity.

b) More than the porosity.

c) Less than the porosity.

d) None of these.

ANSWER: (c)

Q.5: Porosity is:

a) Equal to the specific retention.

b) Equal to the specific yield.

c) Equal to the sum of specific retention and specific yield.

d) Less than the specific yield.

ANSWER: (c)

Q.6: Ratio of volume of voids to the total volume:

a) Permeability.

b) Porosity.

c) Effective porosity.

d) Specific yield.

ANSWER: (b)

Q.7: In an aquifer the porosity varies:

a) Vertically only.

b) Laterally only.

c) Both laterally and vertically.

d) None of these.

ANSWER: (c)

Q.8: Secondary storage spaces may be resulted due to:

a) Diastrophism.

b) Removal of the overburden.

c) Reduction in volume of rocks.

d) All the above.

ANSWER: (d)

Q.9: Permeability of a material is a measure of:

a) Voids available in the material.

b) Voids and solid particles available in the material.

c) Its capacity to transmit water through its interstices.

d) Its capacity to retain water in the material.

ANSWER: (c)

Q.60: Mark the correct statement about permeability:

a) Horizontal permeability is found to have the main path of ground water flow into the bore well.

b) Vertical permeability is found to have the main path of ground water flow into the bore well.

c) Vertical permeability is usually less than the horizontal permeability. »

d) Both (a) and (b).

ANSWER: (d)

Q.10: Permeability of the material depends on:

a) Fluid type.

b) Hydraulic gradient.

c) Inter connected pores.

d) All the above.

ANSWER: (d)

Q11 : Clay is an example of :

a) Aquifer.

b) Aquitard.

c) Aquiclude.

d) Aquifuge.

ANSWER: (c)

Q12: The alluvial aquifers which are underlain by tremendous volume of unconsolidated rock

Material is called as:

a) lntermontane valleys.

b) Extensive plains.

c) Abandoned valleys.

d) Water courses.

ANSWER: (a)

Q.13: Karst terrain is characterised by:

a) Solution channels.

b) Closed depressions.

c) Sinkholes and caves.

d) All the above.

ANSWER: (d)

Q.14: The ground water storage is determined by the:

a) Topographic features in the area.

b) Position of water table.

c) Soil type in the area.

d) Rainfall in the area.

ANSWER: (b)

Q.15: Humidity 'ls usually measured by the:

a) Psychomotor or Hygrometer.

b) Rain gauge.

c) Radiometer.

d) Pyranometer.

ANSWER: (a)

Q16: Line joining points of equal rainfall ls called:

a) Isolated lines.

b) lSObar.

c) lsovel.

d) lsohyets.

ANSWER: (d)

Q.17: When water converted directly from solid state to vapour state then lt is called:

a) Evaporation.

b) Sublimation

c) Transpiration.

d) Evapotranspiration.

ANSWER: (b)

Q.18: The portion of precipitation which appears in the surface streams is called the:

a) Infiltration.

b) Percolation.

c) Runoff

d) Evapotranspiration.

ANSWER: (c)

Q.19: A thin water-film is held tenaciously with a tension of 31 atmospheres or more in the soil

Particles are known as:

a) Hygroscopic water.

b) Capillary water.

c) Gravitational water.

d) None of these.

ANSWER:(a)

Q.20: Mark the correct statement about gravitational water:

a) It is free water held at a tension below 1/3 atmosphere

b) lt saturates the soil.

c) It percolates downwards under the influence of gravity.

d) All the above.

ANSWER:(d)

Q.21: The width of the capillary fringe increases as:

a) The rock interstices become finer.

b) The rock interstices become coarse.

c) The rock interstices remain constant.

d) All the above.

ANSWER:(a)

Q.22: Factors influence wilting point is:

a) Soil type and volume.

b) Plant type and age of plant.

c) Soil type and plant type.

d) Soil type and volume and plant type and age.

ANSWER:(d)

Q.23: The ratio of the water which can be drained freely form the material to the total volume of

‘The material is known as:

a) Specific retention.

b) Specific yield.

c) Porosity

d) Permeability.

ANSWER: (b)

Q.24: Specific yield depends upon:

a) Grain size and shape.

b) Grain size and distribution of pores.

c) Grain shape, .distribution of pores and compaction of formation.

d) Grain size, shape and distribution of pores and compaction of the formation.

ANSWER: (d)

Q.25: Which type of material will have high specific yield:

a) Fine grained.

b) Medium grained.

c) Coarse grained.

d) All the above.

ANSWER: (c)