GATE-2018 (24) :Wyllie – Time average equation

TEST-1

CSIR-NET 2012 JUNE QUIZ TEST 1

  

time limit is 10 minutes

 

1. The freezing point of seawater
   1.   increases with salinity
   2.   decreases with salinity
   3.   is independent of salinity
   4.   increases with evaporation
2. Which one of the following elements residence times is less than of the residence time of the sea water (103 to 104 years)
   1.   Calcium
   2.   Zinc
   3.   Aluminium
   4.   Magnesium
3. The process of nitrification can be described as
   1.   reduction of nitrate to ammonium
   2.   oxidation of ammonium to nitrate
   3.   oxidation of ammonium to nitrogen
   4.   reduction of nitrate to molecular nitrogen
4. The decay of 222Rn86 to 218Po84 is by
   1.   negatron decay
   2.   positron decay
   3.   alpha decay
   4.   electron capture
5. The tilt of the Earth's axis of rotation with respect to the plane of its orbit varies between 21.8 degrees and 24.4 degrees over a period of about
   
   1.   19,000 years
   2.   23,000 years
   3.   100,000 years
   4.   41,000 years
6. As compared to near surface geological targets, the geophysical response of deeper geological targets will have
   
   1.   larger amplitude and longer wavelength
   2.   smaller amplitude and longer wavelength
   3.   smaller amplitude and smaller wavelength
   4.   longer amplitude and smaller wavelength
7. What is the lithostatic pressure at the base of a 35 km column of granitic crust with an average density of 2.8 gm/cc ?
   1.   8.2 kilobars
   2.   5.6 kilobars
   3.   9.8 kilobars
   4.   7.2 kilobars
8. A seismograph receivers a S-wave 60s after it receives the P-wave. If the velocities of P- and S-waves are 7km/s and 6km/s respectively, then the distance of the seismic focus from the seismograph is
   
   1.   2520 km
   2.   42 km
   3.   7070 km
   4.   72km
9. The reason why a lunar eclipse does not occur at every full moon is
   1.   the position of the sun is not favourable at all full moons.
   2.   the orbital planes of the moon and that of the earth are inclined to each other by a small angle.
   3.   the shape of the earth is not a perfect sphere.
   4.   the moon reflects only from one hemisphere.
10. Which of the following represents the correct relative abundance of elements in the Earth's curst?
    1.   Si > O > Fe > Al > Ca > Mg
    2.   O > Al > Fe > Mg > Ca > Si
    3.   O > Si > Fe > Mg > Ca > Al
    4.   O > Si > Al > Fe > Mg > Ca
11. Andean mountains- Atlantic Ocean - San Andreas fault represents one of the following sequences of plate boundaries:
    1.   Constructive - Destructive - Conservative
    2.   Destructive(convergent margin) - Constructive(divergent plate margin) - Conservative
    3.   Conservative - Constructive - Destructive
    4.   Conservative - Destructive - Constructive
12. The meteorite group which most closely matches the composition of our solar system is
    1.   Ordinary chondrite
    2.   Carbonaceous chondrite
    3.   Iron meteorite
    4.   Lunar meteorite
13. An igneous rock comprising predominantly of quartz and K-feldspar can be classified as:
    1.   Gabbro
    2.   Granite
    3.   Peridotite
    4.   Tonalite
14. If σ1 > σ2 > σ3 represnt the principal stresses, then a hydrostatic state of stress is characterised by following condition:
    1.   σ1 > σ2 = σ3
    2.   σ1 = σ2 > σ3
    3.   σ1 > σ2 > σ3
    4.   σ1 = σ2 = σ3
15. If ρ_s ,ρ_g and ρ_r are the resitivities of sea water, ground water and rain water, then which of the following statements is true?
    1.   ρ_s < ρ_g < ρ_r
    2.   ρ_s > ρ_g < ρ_r
    3.   ρ_s < ρ_g > ρ_r
    4.   ρ_s > ρ_g > ρ_r