Geologist Junior • 2020 • Geology Paper-III
Which of the following natural glass has structurally similar to Lichtenberg figures?
A)
Edeowie glass
B)
Fulgurite
C)
Moldavite
D)
Obsidian
Fulgurite is the natural glassy product formed when lightning fuses sand/soil, producing branching structures comparable to Lichtenberg figures.
Geologist Junior • 2020 • Geology Paper-III
The type of foundation generally suitable for buildings on liquefiable soils deposit is:
A)
Pile foundation
B)
Raft foundation
C)
Spread footing
D)
Well foundation
Pile foundations transfer loads to deeper, denser strata and are commonly preferred where near-surface soils are liquefiable.
Geologist Junior • 2020 • Geology Paper-III
Based on earthquake resistant provisions in masonry buildings, the mortar mix is:
A)
1:3:6 (Cement-lime- sand)
B)
1:2:9 (Cement-lime- sand)
C)
1:1:6 (Cement-lime- sand)
D)
1:1:4 (Cement-lime- sand)
The earthquake-resistant masonry recommendation is a 1:1:6 cement-lime-sand mortar mix.
Geologist Junior • 2020 • Geology Paper-III
97% of total chromite deposits in India occurred at Sukinda valley. Which of the following nature is related to this mineral deposit?
A)
Origin of magmatic cycle, chromite Supergroup and stratiform in nature
B)
Origin of magmatic cycle, Iron- ore Supergroup and stratiform in nature
C)
Origin of magmatic cycle, Iron-ore Supergroup and podiform in nature
D)
Skarn deposits, Iron- ore Supergroup and podiform in nature
Sukinda’s major chromite occurrence is a stratiform chromite deposit associated with the chromite/ultramafic sequence rather than a skarn or podiform setting.
Geologist Junior • 2020 • Geology Paper-III
Which of the following is not associated with hydrothermal deposits?
A)
Chromite ores
B)
Porphyry copper
C)
Skarn- magnetite
D)
Vein gold
Chromite is primarily a magmatic orthomagmatic deposit, not a hydrothermal deposit; porphyry Cu, skarn magnetite and vein gold are hydrothermal-related.
Geologist Junior • 2020 • Geology Paper-III
Which of the following skarn tectonic setting is related with oceanic island arcs?
A)
Copper skarn deposit
B)
Iron skarn deposit
C)
Tungsten skarn deposit
D)
Tulc and graphite skarn deposit
Copper skarn deposits are commonly associated with calc-alkaline magmatic systems, including island-arc settings, where intrusions react with carbonate rocks.
Geologist Junior • 2020 • Geology Paper-III
Which word does NOT belong with the others?
A)
guitar
B)
flute
C)
violin
D)
cello
Flute is the only wind instrument; guitar, violin and cello are string instruments. Therefore B is the odd one out.
Geologist Junior • 2020 • Geology Paper-III
Which of the following test method is correct for the determination of mineral ash in coal?
A)
By heating an accurately weighed sample of the coal in an adequately ventilated muffle furnace at temperatures in the range 700 to 750oC.
B)
By heating an 1g of coal in ventilated muffle furnace at temperatures in the range 500 to 600oC.
C)
By heating an 1g of coal in a platinum crucible at 500 to 600oC for 7 minutes.
D)
By heating 1g of coal weighed in a platinum crucible with a close- fitting cover at 950±20oC for exactly 7 minutes, the resultant loss (excluding losses due to water) in weight is mineral ash.
Option D gives the stated coal-testing procedure in the source set for the mineral-ash determination; the wording is unusual, but D is the keyed procedure.
Geologist Junior • 2020 • Geology Paper-III
A sample of wet soil has a volume of 0.0192m3 and a mass of 32kg. When the sample is dried out in an oven, its mass reduces to 28.5kg. The water content of soil is:
A)
1.71%
B)
12.28%
C)
17.1%
D)
18.23%
Water content = (mass of water / mass of dry soil) ×100 = (32−28.5)/28.5 ×100 ≈ 12.28%.
Geologist Junior • 2020 • Geology Paper-III
The unit weight of the soil in a uniform deposit of loose sand (K = 0.50) is 16.5kN/m3. The geostatic stresses at a depth of 2m is:
A)
8.25kN/m2 & 1.0kN/m2
B)
16.5kN/m2 & 8.25kN/m2
C)
33.0kN/m2 & 1.0kN/m2
D)
33.0kN/m2 & 16.5kN/m2
Vertical geostatic stress = γz = 16.5×2 = 33 kN/m². With K=0.50, horizontal stress = 16.5 kN/m².
Geologist Junior • 2020 • Geology Paper-III
Green color mica is related to which of the following belt (s)?
A)
Mica Belt of Andhra Pradesh
B)
Mica Belt of Bihar
C)
Mica Belt of Rajasthan
D)
All of these
Green-coloured mica such as fuchsite is reported from the mica belts of Andhra Pradesh, Bihar and Rajasthan, so all listed belts apply.
Geologist Junior • 2020 • Geology Paper-III
The permissible settlement is the maximum in the case of:
A)
Isolated footing on clay
B)
Isolated footing on sand
C)
Raft on clay
D)
Raft on sand
Rafts generally tolerate the largest total settlement among the listed foundation cases; the commonly quoted permissible total settlement is about 100 mm for raft foundations on clay.
Geologist Junior • 2020 • Geology Paper-III
The Ghattihosahalli schist belt in India comprising an important deposit of which mineral?
A)
Apatite
B)
Asbestos
C)
Barytes
D)
Beryl
The Ghattihosahalli schist belt is known for its important barytes (barite) occurrence.
Geologist Junior • 2020 • Geology Paper-III
According to IS: 1893- 2002, the value of the horizontal seismic coefficient for any structure with natural period of vibration in second (T) <= 0.1 cannot be less than Z/2 (Z= Zone factor of the seismic zone). The horizon seismic coefficient for seismic zone V is:
A)
0.8
B)
0.12
C)
0.18
D)
0.24
For Zone V, Z = 0.36, so the minimum horizontal seismic coefficient is Z/2 = 0.18.
Geologist Junior • 2020 • Geology Paper-III
In USGS/ USBM reserve classification scheme, a resources which are undiscovered theoretical mineral bodies in nature that may logically be expected to exist in known mining district or region under favorable geological conditions is:
A)
Hypothetical
B)
Paramarginal
C)
Speculative
D)
Submarginal
Hypothetical resources are undiscovered bodies reasonably expected to exist within known mining districts or regions under favourable geological conditions.
Geologist Junior • 2020 • Geology Paper-III
Which of the following statement is false about UNFC classification?
A)
UNFC is a three digit code based system- Economic viability axis, feasibility axis and geologic axis.
B)
Geological axis represented by four codes- Detailed exploration, general exploration, prospecting and reconnaissance.
C)
Feasibility axis have three codes- Feasibility study, Pre- feasibility study and geochemical study.
D)
Economic axis have three codes- Economic, potentially economic and intrinsically economic.
The feasibility axis is not defined by “geochemical study”; its codes relate to feasibility and pre-feasibility, making this statement false.
Geologist Junior • 2020 • Geology Paper-III
The fundament formula for civil engineering projects, a shear strength (s) given by Mohr- Colomb is:
A)
s = c ± stanw
B)
s = c + stanw
C)
s = s + ctanw
D)
s = cs + tanw
Mohr–Coulomb shear strength is s = c + σ tanφ; option B is the intended expression despite typographical defects in the symbols.
Geologist Junior • 2020 • Geology Paper-III
Two minerals fluorapatite and hydroxyapatite is related with which of the following fertilizer?
A)
Compound fertilizer
B)
Nitrogen fertilizer
C)
Phosphate fertilizer
D)
Potassium fertilizer
Fluorapatite and hydroxyapatite are phosphate minerals and are therefore related to phosphate fertilizers.
Geologist Junior • 2020 • Geology Paper-III
The coefficient of curvature (Cc) after particle size distribution curve is given by the formula of:
A)
Cc = D60 / D10
B)
Cc = (D30)^2 / (D10 * D60)
C)
Cc = (D10)^2 / (D30 * D60)
D)
Cc = D60 * D10 / D30
The coefficient of curvature is Cc = (D30)^2/(D10×D60).
Geologist Junior • 2020 • Geology Paper-III
Which of the following block is not related with ONGC Coal-bed methane (CBM) gas blocks?
A)
Bokaro
B)
Cambay
C)
Jharia
D)
Karanpura
ONGC's CBM blocks include Jharia, Bokaro, North Karanpura and Raniganj. Cambay is an oil/gas basin rather than the listed ONGC CBM block, so B is correct.
Geologist Junior • 2020 • Geology Paper-III
An ideal temperature range for transformation of kerogen to hydrocarbon at a depth of 3-4km with a normal geothermal gradient is:
A)
80- 90oC
B)
80- 150oC
C)
100- 150oC
D)
150- 180oC
Kerogen commonly generates petroleum within the oil window of roughly 80–150°C under a normal geothermal gradient.
Geologist Junior • 2020 • Geology Paper-III
A type of maceral having very fine- grained material, fine particles of small size (2 microns and high reflectance is:
A)
Fusinite
B)
Funginite
C)
Micrinite
D)
Secretinite
Micrinite consists of very fine-grained maceral material with small particle size and relatively high reflectance.
Geologist Junior • 2020 • Geology Paper-III
Fluid inclusions which are trapped during formation of the host minerals are:
A)
Primary fluid inclusions
B)
Secondary fluid inclusions
C)
Pseudosecondary fluid inclusions
D)
Tertiary fluid inclusions
The primary fluid in most magmatic-hydrothermal ore-forming systems is aqueous fluid, commonly derived from magmatic fluids and later mixed with meteoric water.
Geologist Junior • 2020 • Geology Paper-III
Which of the following sampler is used for getting undisturbed soil samples from soft and sensitive clays?
A)
Denison sampler
B)
Hand- carved samples
C)
Piston sampler
D)
Shelby tubes and thin- walled sampler
Thin-walled Shelby tubes and piston-type samplers are used to obtain relatively undisturbed samples from soft, sensitive clays.
Geologist Junior • 2020 • Geology Paper-III
A natural gas discovered by ONGC at Meidum exploring site in 2011. Which of the following statement is correct regarding this achievement?
A)
Lower Bhuban Formation, 3318-3325m, maximum flame height 10ft.
B)
Middle Bhuban Formation, 3318-3325m, maximum flame height 8ft.
C)
Upper Bhuban Formation, 3318-3325m, maximum flame height 10ft.
D)
Ranighanj Formation, 3318-3325m, maximum flame height 10ft.
ONGC's Meidum discovery was in the Lower Bhuban Formation at about 3318–3325 m, with a maximum flame height of about 10 ft.
