Calculation of true thickness of the bed

TEST-4

  

time limit is 5 minutes

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1. A landform that results from fall of rocks is called
   1.   Alluvial fan
   2.   Talus slope
   3.   Eskers
   4.   Debris flow
2. 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.   12
   2.   13
   3.   11
   4.   10
3. 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.   39 m
   2.   40 m
   3.   50 m
   4.   43.47 m
4. 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.   0.33
   2.   0.11
   3.   0.44
   4.   0.22
5. In the estimation of magnetotelluric transfer function, the time independent conservation of current at conductivity discontinuities will result in
   1.   equal bi-modal apparent resistivity values
   2.   null tipper
   3.   Phase rotation
   4.   Static shift
6. Hawaiian Island chain is the result of
   1.   Divergence of two oceanic plates
   2.   collision of two oceanic plates
   3.   Intraplate hot spot activity
   4.   Interplate hot spot activity
7. 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.   600 m
   2.   400 m
   3.   1000 m
   4.   800 m
8. Gardner's formula relates the seismic P-wave velocity (Vp) to
   1.   lithology
   2.   porosity
   3.   density
   4.   permeability
9. 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.   Q
   2.   K
   3.   A
   4.   H
10. 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.   8 km
    2.   9 km
    3.   11 km
    4.   10 km