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Latest OPSC Geologist Exam Question (Objective Questions), MCQ in English

Subjects : Geology

Question Bank OPSC Geologist Exam Paper 2 - English
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Geology

Question 1Single Answer
Which amongst the following planets has the highest number of known satellites ?
  1. A
    Mars
  2. B
    Uranus
  3. C
    Venus
  4. D
    Mercury
Question 2Single Answer
S-wave is terminated at:
  1. A
    Crust-Mantle boundary
  2. B
    Lithosphere-Asthenosphere boundary
  3. C
    Mantle-Core boundary
  4. D
    Inner and Outer core boundary
Question 3Single Answer
Arrange the elements Fe, O, H, He, Si in decreasing order of their abundance in the solar system.
  1. A
    H > He > O > Si > Fe
  2. B
    He > H > Si > O > Fe
  3. C
    H > He > O > Fe > Si
  4. D
    Si > Fe > H > He > O
Question 4Single Answer
In the given figure (i),(ii),(iii) and (iv) denote the plate tectonic settings: Mid Oceanic Ridge (M), Island Arc (I), Continental Arc C. and Rift Zone (R).Which one of the following options is correctly matched ?
  1. A
    (i) - M, (ii) - I, (iii) - C, (iv) - R
  2. B
    (i) - R, (ii) - I, (iii) - M, (iv) - C
  3. C
    (i) - I, (ii) - R, (iii) - M, (iv) - C
  4. D
    (i) - I, (ii) - M, (iii) - C, (iv) - R
Question 5Single Answer
The mechanism of plate movement is thought to be driven by :
  1. A
    Isostasy
  2. B
    Earth's rotation
  3. C
    Thermal convection cells
  4. D
    Polar wandering
Question 6Single Answer
Hawaii island has its origin from:
  1. A
    Subducting plate
  2. B
    Plume
  3. C
    Plate collision
  4. D
    All of the above
Question 7Single Answer
Most abundant element in the earth crust is:
  1. A
    Oxygen
  2. B
    Silicon
  3. C
    Aluminium
  4. D
    Iron
Question 8Single Answer
Instrument for recording earthquake wave is called :
  1. A
    Seismograph
  2. B
    Seismograme
  3. C
    Seismometer
  4. D
    Scintillometer
Question 9Single Answer
The cosmic ray intensity is minimum at the magnetic :
  1. A
    Equator
  2. B
    North pole
  3. C
    South pole
  4. D
    Tropic of cancer
Question 10Single Answer
What power the Earth's internal heat engine ?
  1. A
    Solar energy
  2. B
    Ocean tides
  3. C
    Volcanoes
  4. D
    Radioactivity
Question 11Single Answer
Oxygen built up in the Earth's atmosphere is caused by :
  1. A
    Formation of ocean in early history of Earth
  2. B
    Algae and other organisms employed photosynthesis
  3. C
    Oxygen settled on Earth from planets further from the sun
  4. D
    Rocks weathered and released their oxygen.
Question 12Single Answer
Increased concentration of which of the following may cause maximum global warming ?
  1. A
    Oxygen
  2. B
    Nitrogen
  3. C
    Carbon dioxide
  4. D
    Water vapour
Question 13Single Answer
Global warming may lead to increased sea level as a result of :
  1. A
    Melting of ice-caps
  2. B
    Thermal expansion of sea water
  3. C
    Both A and B
  4. D
    Isostatic rebound
Question 14Single Answer
Three major orbit ally forced cyclicties (-100 kyr,-40 kyr,-22 kyr) in the climatic changes on Earth are termed as :
  1. A
    Milankovitch cycle
  2. B
    Turner cycle
  3. C
    Glieesberg cycle
  4. D
    Wilson cycle
Question 15Single Answer
Ozone layer in Earth's atmosphere, is confined to:
  1. A
    Troposphere
  2. B
    Stratosphere
  3. C
    Mesosphere
  4. D
    Thermosphere
Question 16Single Answer
The most abundant element in the Earth's crust is :
  1. A
    Aluminium
  2. B
    Oxygen
  3. C
    Iron
  4. D
    Carbon
Question 17Single Answer
The internal structure of the Earth down up to the core, has been explored with the help of :
  1. A
    P-waves
  2. B
    S-waves
  3. C
    Both P- and S-waves
  4. D
    Drilling
Question 18Single Answer
We get Lehmann discontinuity at an approximate depth of :
  1. A
    100 km
  2. B
    750 km
  3. C
    450 km
  4. D
    220 km
Question 19Single Answer
Maximum damage in the event of an earth-quake is cause by :
  1. A
    P-waves
  2. B
    S-waves
  3. C
    L-waves
  4. D
    All of the above
Question 20Single Answer
A negative gravity anomaly indicates :
  1. A
    An excess of mass
  2. B
    A deficiency in mass
  3. C
    A reversal of the gravitational field
  4. D
    None of these
Question 21Single Answer
To qualify as a desert, a region must be :
  1. A
    Hot, with a mean annual temperature greater than 25°C (77°F)
  2. B
    Arid, with less than 15% of the ground surface vegetated
  3. C
    Both hot and arid
  4. D
    Either hot or arid
Question 22Single Answer
At 300 north latitude, at the northern edge of tropical (Hadley) cell, convection takes place because :
  1. A
    Cool, dry air sinks, becoming drier as it heats up
  2. B
    Warm, moist air rises, increasing in relative humidity as it rises
  3. C
    Warm, dry air rises, becoming cooler
  4. D
    Cool moist air sinks, providing abundant rainfall
Question 23Single Answer
The Gobi of Mongolia is a desert primarily because it is located :
  1. A
    In the subtropics
  2. B
    Near the geographic South Pole
  3. C
    Near the center of a large continent
  4. D
    Next to a cold ocean current
Question 24Single Answer
In atmosphere radio wave occur in :
  1. A
    Troposphere
  2. B
    Stratosphere
  3. C
    Mesosphere
  4. D
    Ionosphere
Question 25Single Answer
The process by which an originally homogeneous Earth developed a dense core and a light crust is called :
  1. A
    Metamorphism
  2. B
    Differentiation
  3. C
    Accretion
  4. D
    Compression
Question 26Single Answer
The Gutenberg discontinuity lies between :
  1. A
    Crust and mantle
  2. B
    Lithosphere and asthenosphere
  3. C
    Outer core a and lower mantle
  4. D
    Inner core and outer core
Question 27Single Answer
Airy's model of isostasy :
  1. A
    Requires mountains to have higher density than the oceanic crust
  2. B
    Requires mountains to have lower density than the oceanic crust
  3. C
    Requires mountains to have the same density as oceanic crust
  4. D
    Does NOT consider the densities of mountain and oceanic crust
Question 28Single Answer
Himalaya is a product of :
  1. A
    Continent-arc collision
  2. B
    Continent-continent collision
  3. C
    Arc-arc collision
  4. D
    Continent-arc-continent collision
Question 29Single Answer
The oldest rocks in the present ocean floor have age in range :
  1. A
    4.0-4.6 billion years
  2. B
    2.0-2.5 billion years
  3. C
    185-200 million years
  4. D
    60-65 million years
Question 30Single Answer
The type of plate boundary associated with deep focus earthquake ?
  1. A
    Divergent
  2. B
    Convergent
  3. C
    Transverse
  4. D
    Both A. & B.
Question 31Single Answer
The most abundant element in the universe is :
  1. A
    Silicon
  2. B
    Helium
  3. C
    Oxygen
  4. D
    Hydrogen
Question 32Single Answer
What is the age of ocean floor ?
  1. A
    0-200 m.y.
  2. B
    0-500 m.y.
  3. C
    0-1000 m.y.
  4. D
    0-3500 m.y.
Question 33Single Answer
New seafloor created at a :
  1. A
    Deep sea trench
  2. B
    Mid-oceanic ridge
  3. C
    Subduction zone
  4. D
    Transform fault
Question 34Single Answer
By the plate tectonic processes, magma generation is highest in the following tectonic setting :
  1. A
    Convergent plate boundary
  2. B
    Continental intra-plate region
  3. C
    Oceanic intra-plate region
  4. D
    Oceanic ridges
Question 35Single Answer
Which of the following is a living fossil ?
  1. A
    Arca
  2. B
    Cardita
  3. C
    Lingula
  4. D
    Trigonia
Question 36Single Answer
Which one of the following features is NOT associated with an oceanic subduction ?
  1. A
    Sea-mount
  2. B
    Benioff zone
  3. C
    Back-arc
  4. D
    Fore-arc
Question 37Single Answer
The term isostasy refers to :
  1. A
    Gravitational equilibrium
  2. B
    Thermal equilibrium
  3. C
    Magnetic equilibrium
  4. D
    Electrical equilibrium
Question 38Single Answer
Deep sea trenches are associated with plate boundary :
  1. A
    Convergent
  2. B
    Divergent
  3. C
    Translational
  4. D
    Neutral
Question 39Single Answer
What drive(s) the earth's internal heat engine ?
  1. A
    Radioactivity
  2. B
    Solar energy
  3. C
    Volcanism
  4. D
    Ocean tides
Question 40Single Answer
Specimen of a species from the same locality as its holotype is called
  1. A
    Neotype
  2. B
    Metatype
  3. C
    Paratype
  4. D
    Topotype
Question 41Single Answer
A deep valley forms where two plates pull apart :
  1. A
    Fault
  2. B
    Pangea
  3. C
    Mantle
  4. D
    Rift valley
Question 42Single Answer
Mountain chain within water is :
  1. A
    Trench
  2. B
    Mid-oceanic ridge
  3. C
    Volcanic island
  4. D
    Reefs
Question 43Single Answer
A boundary where plates slide past each other in opposite directions is termed as :
  1. A
    Transform boundary
  2. B
    Tensional zone
  3. C
    Diverse boundary
  4. D
    Converging boundary
Question 44Single Answer
Wadati-Benioff zone indicates :
  1. A
    Shallow earthquake
  2. B
    Intermediate earthquake
  3. C
    Technical stable zone
  4. D
    Deep focus earthquake
Question 45Single Answer
The first wave recorded on seismograph is :
  1. A
    P-wave
  2. B
    S-wave
  3. C
    P- and S-wave
  4. D
    L-wave
Question 46Single Answer
The average radius of the earth is :
  1. A
    6378 km
  2. B
    637.1 km
  3. C
    6372 km
  4. D
    6271 km
Question 47Single Answer
'Sima' is a part of :
  1. A
    Quter core
  2. B
    Crust
  3. C
    Upper mantle
  4. D
    Lower mantle
Question 48Single Answer
The instrument used for recording seismic waves is :
  1. A
    Thermometer
  2. B
    Seismograph
  3. C
    Barometer
  4. D
    Seismogram
Question 49Single Answer
The 'Nebular Hypothesis' was proposed by :
  1. A
    Kant
  2. B
    Laplace
  3. C
    Kant and Laplace
  4. D
    Moulten and Chamberlin
Question 50Single Answer
Himalaya is :
  1. A
    Paleozoic tectonic mountain
  2. B
    Recent folded mountain
  3. C
    Collisional mountain
  4. D
    Indian mountain
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