Worksheetscobacoba
Total questions: 24
Worksheet time: 12mins
Name
Class
Date
1.
lalalala adalah
a)
lagu
b)
senandung
c)
apa ya
d)
skip ah
e)
emboh
2.
warna apa yang risma suka?
a)
kuning
b)
hitam
c)
pastel
d)
hijau
e)
ungu
3.
warna seprai risma
a)
putih
b)
pink
c)
kuning
d)
abu-abu
4.
makanan yang disukai risma
a)
bakso
b)
cireng
c)
batagor
d)
pempek
e)
cake
5.
A device that detects seismic wave motion is termed a
a)
Seismometer
b)
Seismograph
c)
Wave Station
d)
MatLab
e)
No correct answer
6.
The entire instrument package, including the recording apparatus, is called a
a)
Seismometer
b)
Seismograph
c)
Wave Station
d)
MatLab
e)
No correct answer
7.
Motions of the lever are damped using a
a)
Seismometer
b)
Seismograph
c)
Dashpot
d)
Wave Station
e)
MatLab
8.
The function of dashpot is to prevent excessive oscillations near the system's resonant
a)
Mass
b)
Earthquake Sound
c)
Crack
d)
Frequency
e)
Amplitude
9.
Symbol for Earth motion in terms of the displacement field is
a)
s(y,t)
b)
s(v,t)
c)
u(x,y)
d)
u(y,t)
e)
u(x,t)
10.
The most common type of seismometer is based on the inertia of a suspended …., which will tend to remain stationary in response to external vibrations.
a)
Mass
b)
Velocity
c)
Time
d)
Wave
e)
Duration
11.
Vertical and horizontal suspended mass instruments are sometimes called … seismometer
a)
Normal
b)
Inertial
c)
Inversed
d)
Gravitional
e)
No correct answer
12.
For small values of the damping parameter, a resonant peak occurs in the response spectrum near … Hz
a)
3
b)
2
c)
1
d)
4
e)
5
13.
Measurements of the mass displacement can provide significant sensitivity to Earth acceleration at frequencies below the natural seismometer resonance frequency. Vertical-component instruments of this type can serve as ...
a)
Seismometer
b)
Velocity meter
c)
Timer
d)
Gravimeter
e)
Vertical seismometer
14.
The frequency band over which seismic waves are recorded is roughly devided into two parts by the microseism ground noise peak that occurs at periods or approximately …. Hz
a)
0.02 to 0.07
b)
0.01 to 0.05
c)
0.17 to 0.22
d)
0.05 to 0.10
e)
0.12 to 0.17
15.
The absolute displacement of the mass is given by the sum both of
a)
u(t)
b)
z(t)
c)
s(t)
d)
y(t)
e)
x(t)
16.
Anisotropy in rocks can arise in two fundamentally different ways, which have been<br />termed
a)
u(t)
b)
SPO
c)
LPO
d)
P
e)
S
17.
Cracks with no preferred orientation will not cause anisotropy but will reduce the isotropic...velocities of the bulk material
a)
u(t)
b)
z(t)
c)
P
d)
S
e)
x(t)
18.
Azimuthal anisotropy is required to explain shear-wave splitting observed in
a)
Am travel time studies
b)
Mn travel time studies
c)
SKS Spliting Studies
d)
Teleseismic S
e)
SKS Arrivals
19.
Azimuthal upper-mantle anisotropy is observed in both of
a)
Pn travel time studies
b)
Lm travel time studies
c)
Am travel time studies
d)
Mn travel time studies
e)
SKS Spliting Studies
20.
In general, seismometers may measure …
a)
Displacement
b)
Velocity
c)
Acceleration of the sensor mass
d)
Mass
e)
Time
21.
…. Recods as those obtained at frequencies above the microseism peak, whereas … reconds are at frequencies below the peak.
a)
Short period
b)
Medium period
c)
Long period
d)
Average period
e)
Very long period
22.
Typical long period internial seismometers have periods between … and … seconds
a)
10
b)
12
c)
15
d)
22
e)
30
23.
Anisotropy in rocks can arise in two fundamentally different ways, which have been termed as … in which the matierial is isotropic at very fine scale and .. In which the anisotropy arises from a preferred orientation of intrinsically anisotropic mineral crystals.
a)
Shape-preffered orientation
b)
Lattice-preferred orientation
c)
Mass-preferred orientation
d)
Density-preferred orientation
e)
Porosity-referred orientation
24.
The strength of the anisotropy depends upon the …
a)
Mass
b)
Crack density
c)
Crack aspect ratio
d)
Degree of crack alignment
e)
Porosity
100 %
