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

TEST-4

  

time limit is 5 minutes

 

1. Hawaiian Island chain is the result of
   1.   collision of two oceanic plates
   2.   Intraplate hot spot activity
   3.   Divergence of two oceanic plates
   4.   Interplate hot spot activity
2. Which type of VES curve is obtained for a three layered earth model consisting of wet shale (top layer) ,poorly water saturated sandstone (middle layer) and impermeable granite (bottom layer)?
   1.   K
   2.   Q
   3.   H
   4.   A
3. Gardner's formula relates the seismic P-wave velocity (Vp) to
   1.   density
   2.   porosity
   3.   permeability
   4.   lithology
4. A spherical body with its center located at depth of 1040 m gives a symmetric residual gravity anomaly high with Δgmax=5.2 m Gal. If the same anomaly were to be obtained over a 2-D horizontal cylinder, the depth to the center of the horizontal cylinder (in m) is........
   1.   400 m
   2.   600 m
   3.   800 m
   4.   1000 m
5. In a 3-D seismic survey the bin size for the maximum frequency (f max) of 80 Hz at the target having a reflector dip of 15° and interval velocity of 3600 m/s is........
   1.   40 m
   2.   43.47 m
   3.   50 m
   4.   39 m
6. In a consolidated sandstone formation the interval transit times of the formation matrix and fluid are 70μm , 55μm and 190μm respectively. The porosity of the formation is .....
   1.   0.11
   2.   0.22
   3.   0.33
   4.   0.44
7. Considering the Airy isostatic compensation for a mountain having elevation of 2.0km above the mean sea level at a point P, the thickness of its root below P would be ...km. ( consider densities of crustal rock and upper mantle as 2.7gm/cc and 3.3 gm/cc respectively)
   1.   10 km
   2.   9 km
   3.   11 km
   4.   8 km
8. The maximum foldage obtained from a 48-channel common depth point (CDP) reflection survey with the geophone and shot point spacing of 50m and 100m respectively , is.....
   1.   10
   2.   11
   3.   12
   4.   13
9. In the estimation of magnetotelluric transfer function, the time independent conservation of current at conductivity discontinuities will result in
   1.   Phase rotation
   2.   Static shift
   3.   null tipper
   4.   equal bi-modal apparent resistivity values
10. A landform that results from fall of rocks is called
    1.   Talus slope
    2.   Eskers
    3.   Alluvial fan
    4.   Debris flow