| Post Name | Junior Hydro Geologist - Department Ground Water |
|---|---|
| Question Paper Code | 088/2023/OL |
| Category Code | 390/2021 |
| Date of Test | 20 June 2023 |
| Exam Type | Online Examination |
| Total Questions | 100 |
1
The term corresponds numerically to the difference between the specific yield and the total effective porosity.
Answer
D. Specific retention
2
The formation in which the pore water pressure generally less than atmospheric pressure.
Answer
D. None of the above
3
Water in which salinity tends to reflect various episodes in local geological history, such as prehistoric incursions of the sea.
Answer
C. Connate water
4
Darcy's law is applicable only for
Answer
B. laminar and porous media
5
The residence time for groundwater is approximately
Answer
A. 2 weeks to 10,000 yrs
6
Which among the following is correct regarding a groundwater basin? (i) It is hydrogeologic unit with one large aquifer or several connected and interconnected aquifers. (ii) An area of the earth's crust that is underlain by a thick sequence of sedimentary rocks. (iii) In limestone areas, the drainage and groundwater basins have the same configurations.
Answer
D. Only (i)
7
Aquifers that are completely confined or unconfined, found in alluvial valleys, plains or former lake basins where a permeable stratum is overlain or underlain by semi previous aquitard is known as
Answer
B. Leaky aquifer
8
A spring resulting from the expansive force of superheated steam within constricted subsurface channels.
Answer
B. Geyser
9
Lake volume change, evaporation and precipitation of lake can be estimated by using
Answer
B. Thornthwaithe - Holz-man equation
10
Which among the following statement is true regarding porosity? (i) Rocks have higher porosities than soils. (ii) Gravels, sands and silts which are made up of angular and rounded particles, have higher porosities than soils rich in platy clay minerals. (iii) Poorly sorted deposits have lower porosities than well-sorted deposits. (iv) Clay-rich soils have higher porosities but lower hydraulic conductivities.
Answer
D. Only options (iii) and (iv)
11
Which geological formation can provide small domestic water supply from shallow, large diameter wells?
Answer
B. Clay
12
Which among the following is true regarding the capillary rise? (i) The wider the tube, the higher the water level rises. (ii) The narrower the tube, the higher the water level rises. (iii) There is no relation between the pore size and water level rise.
Answer
B. Only (ii)
13
Spring that are found only in Karst aquifers.
Answer
D. Doline spring
14
Choose the correct statement from the below options: (i) Volcanic rock can form highly permeable aquifers. (ii) In sandstone, the porosity and yield have been increased by cement. (iii) Igneous and metamorphic rocks are impermeable in nature. (iv) Rhyolites are less permeable than basalt.
Answer
D. Only (i), (iii) and (iv)
15
Choose the correct definition for Darcy's law:
Answer
B. The flow rate through a porous media is proportional to the head loss and inversely proportional to the length of the flow path.
16
The instrument used for measuring soil moisture is
Answer
Question Cancelled
17
The hydraulic conductivity of a soil/rock depend on
Answer
D. All of the above
18
The unit of Transmissivity is given by
Answer
B. /day
19
Match the following items in Set A with Set B: Set A Set B (a) Aquiclude - (i) Clay (a) Aquifer - (ii) Solid granite (a) Aquifuge - (iii) Sandy clay (a) Aquitard - (iv) Gravel
Answer
C. a-(i), b-(iv), c-(ii), d-(iii)
20
Recharge rates are maximum in which of the given formations.
Answer
D. Indo-Gangetic alluvium
21
In the Global water supply, groundwater contributes about
Answer
B. 0.61%
22
In the statements given below, which among the following supports the process of evaporation: (i) If the number passing to the vapor state exceed the number joining the liquid, it results in evaporation. (ii) When water passes from the liquid to the vapor state, it will absorb about 590 cal of heat. (iii) The vapor pressure of the liquid is inversely proportional to the temperature. (iv) Evaporation will proceed until the air becomes saturated with moisture.
Answer
D. Only (i), (ii) and (iv)
23
The hydrologic outputs from an area may include
Answer
D. Both (2) and (3)
24
The least porosity that can be attained with the same grains is found in
Answer
A. Rhombohedral packing
25
If the hydraulic conductivity 'k' is independent of the direction of measurement, then the formation is said to be
Answer
B. Isotropic
26
Which among the following statement is true regarding permeameters? (i) Permeameters can be used to measure the storage coefficient of the aquifers. (ii) The falling head permeameter is used for noncohesive sediments. (iii) The constant head permeameter is used for cohesive sediments.
Answer
D. None of the option is true
27
Subtraction of depth of water in the piezometer on the basis of water from surface elevation.
Answer
B. Hydraulic head
28
In which of the following condition the Bernoulli equation or principle not be used?
Answer
A. Viscous flow
29
The area which represent the height above a datum plane at which the water level stands in tightly cased wells that penetrates the aquifer.
Answer
D. Potentiometric surface
30
The area which include the contact between an aquifer composed of sand and a laterally adjacent bed composed of clay.
Answer
C. Impermeable boundary
31
Which one of the following point/points are determining the yield of groundwater system and evaluating the movement? (i) The position and thickness of aquifers and confining beds. (ii) The transmissivity and storage coefficient of the aquifers. (iii) The hydraulic characteristics of the confining beds. (iv) The position and nature of the aquifer boundaries.
Answer
D. All of the above
32
The reason behind saturation by rain and capillary rise destroy the film causing loss of stability.
Answer
Question Cancelled
33
The depth to the water in a non-flowing well is subtracted from the altitude of the measuring point, then the result should be
Answer
C. Total head
34
Which among the following statement is true regarding fractures? (i) Crystalline rocks often have a fracture set that parallels the ground surface. (ii) The density of fractures and the permeability of fractured rock decreases with depth. (iii) With increasing depth, the average fracture aperture decreases.
Answer
D. All of the above
35
The average amount of time that a water molecule resides in a particular reservoir before transferring to another reservoir is calculated as
Answer
B. Volume of a reservoir divided by the total flux in or out of the reservoir
36
Which among the following process affect the porosity and permeability of carbonate rocks when it is buried deeply?
Answer
D. All of the above
37
The lateral flow of water from the unsaturated zone to the surface water body.
Answer
B. Interflow
38
Which among the following equation shows the correct relationship of porosity (n) and void ratio (e) of a porous media?
Answer
A. n = e/(1 + e)
39
The crest of the water table, with flow on either side going in opposite directions.
Answer
C. Groundwater divide
40
Lysimeter is used to determine which among the following parameters?
Answer
D. Evapotranspiration
41
Which of the following remains constant in the steady state system?
Answer
A. Mass
42
A reaction occurs in a vessel such that its mass does not change but its temperature is increased, then the system is which of the following?
Answer
B. Unsteady-state
43
The discharge per unit drawdown at a well is known as
Answer
D. Specific capacity
44
_________ wells are constructed when low yielding groundwater sources are found relatively close to the surface, usually less than 30 m (100 ft.). These are constructed using a rotary bucket auger.
Answer
C. Bored
45
Which aquifer is called water table aquifer?
Answer
A. Unconfined aquifer
46
Which sedimentary rock is told to be the best kind of formation for groundwater?
Answer
C. Gravel
47
The yield of a well depends on _________.
Answer
D. Permeability and actual flow velocity
48
The performance of a well is measured by its ________.
Answer
A. Specific capacity
49
When two wells are situated near each other, the discharge in individual well is _______.
Answer
B. decreased
50
What is the speciality of the Artesian Water?
Answer
C. Requires no pumping
51
The term which is collectively responsible, along with specific yield, for total porosity of an aquifer is ________.
Answer
B. Specific retention
52
What is the isolated water table held by a small extension of impervious rock called?
Answer
C. Perched water
53
What is the upper surface of water in a confined aquifer called?
Answer
D. Piezometric layer
54
Groundwater is a source of trouble at which place?
Answer
B. Slopes
55
The method in which 4 electrons are driven in the ground at equal distance apart and in a straight line upto a depth which the ground distance is to be measured.
Answer
C. Electrical resistivity method
56
Which of the following is proved to be useful, ongoing over the site?
Answer
Question Cancelled
57
The number of blows required to drive the penetrometer into the ground through a distance of 300 mm is measured which is known as ________ of the soil.
Answer
A. Standard penetration resistance
58
The shock waves so produced travel down in the sub soil strata and get reflected after striking a hard rock surface below and recorded by the instrument known as ________.
Answer
B. Geophone
59
What is the volume of voids in a rock mass expressed in percentage of total volume of rock called?
Answer
A. Porosity
60
The following is the name of the instrument used to record earthquake waves:
Answer
A. Seismograph
61
An example of aquitard stratum in the ground profile is a layer of ________.
Answer
C. Sandy clay
62
The clogging of well screens and consequent reduction in pump efficiency is indicated by _________.
Answer
A. the high value of the well-loss
63
Which type of tools can be used to measure the density of the formation fluid?
Answer
D. Nuclear Fluid Densimeter
64
What does the high capture cross-section signifies?
Answer
A. Water Bearing Formation
65
The general exploration gives information about which of the following features?
Answer
Question Cancelled
66
Ground water samples should be collected at least up to a distance ________ km.
Answer
D. 5
67
Leachate containing lead causes ________ in humans in case of long term exposure.
Answer
A. Anorexia
68
Groundwater contamination from pesticide storage falls under ________ category source.
Answer
A. Agriculture
69
An associated protection of rising water-table is the development of ________.
Answer
C. Salinity of water
70
How groundwater contamination occurs from landfill?
Answer
A. Through leachate
71
SDWA established _________ drinking water source protection programs.
Answer
C. 3
72
The rock which shows great variation in water yielding capacity is ________.
Answer
B. Granite
73
Groundwater table may be lowered by method
Answer
C. Well point system
74
Hydrograph is the graphical representation of
Answer
A. Runoff and time
75
In India, what is the major cause of water-borne diseases?
Answer
A. Pollution of water
76
Which disease amongst the following is caused by drinking contaminated water?
Answer
D. All of the above
77
How many types of organic matter are present in the water?
Answer
Question Cancelled
78
When an aquifer is used to artificially recharge by making it pass through an intervening layer, the aquifer acts as _________.
Answer
D. A filter plant
79
Alkalinity in water is expressed as milligrams per liter in terms equivalent to
Answer
B. Calcium carbonate
80
Environment Protection Act was implemented in:
Answer
B. 1986
81
Which one is considered as the potential aquifer of Kerala along coastal plains?
Answer
A. Alluvial deposits
82
Kerala receives an average annual rain fall of
Answer
C. 3060 mm
83
A District of Kerala in which rising trend in ground water level in wells is observed
Answer
Question Cancelled
84
Block in Kerala which has been classed as critical
Answer
C. Kasaragod
85
Fluoride contamination is seen in
Answer
B. Palakkad
86
The term which is used to describe all types of liquid waste
Answer
A. Sewage
87
Arsenic contamination of ground water is seen in which state of India?
Answer
B. West Bengal
88
Which city in India is facing acute water shortage?
Answer
D. Chennai
89
Largest consumer of ground water in the world
Answer
C. India
90
Which among the following is considered as the very successful method for conserving ground water?
Answer
C. Rain water harvesting
91
The amount of water stored in the soil is known as
Answer
D. Soil moisture
92
Most commonly seen aquifer in Alappuzha are
Answer
D. Laterite
93
An example for a plateau in the Kerala region is
Answer
A. Munnar
94
The crystalline rocks of Kerala region belongs to which geologic age
Answer
D. Archean
95
Most developed aquifer system among the Tertiary group in Kerala
Answer
C. Warkalli
96
Among the given rocks which crystalline rocks in Kerala are better aquifers
Answer
A. Charnockites
97
Which district in Kerala has reported more amount of bacterial contamination?
Answer
A. Alappuzha
98
High salinities are found in soils and ground water of
Answer
D. Arid climate
99
Which among the following is considered as the least porous material
Answer
D. Shale
100
Recharge area is that region which
Answer
Question Cancelled
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