Earth and Its Structure NDA Questions

NDA Physical Geography

Earth and Its Structure MCQ Questions


13.
Which instrument records earthquake waves?
A.
Seismograph
B.
Barometer
C.
Hygrometer
D.
Richter meter
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ANSWER :
A. Seismograph
14.
Which earthquake waves arrive at the surface FIRST?
A.
Surface waves
B.
P-waves (Primary waves)
C.
L-waves
D.
S-waves
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ANSWER :
B. P-waves (Primary waves)
15.
Which earthquake waves can travel ONLY through solid materials?
A.
Surface waves
B.
S-waves (Secondary waves)
C.
Both P and S waves
D.
P-waves
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ANSWER :
B. S-waves (Secondary waves)
16.
P-waves (Primary waves) are similar to which type of waves?
A.
Light waves
B.
Electromagnetic waves
C.
Sound waves
D.
Radio waves
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ANSWER :
C. Sound waves
17.
The direction of vibration of S-waves is:
A.
Circular around the propagation axis
B.
Parallel to the direction of propagation
C.
Horizontal only
D.
Perpendicular to the direction of propagation in the vertical plane
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ANSWER :
D. Perpendicular to the direction of propagation in the vertical plane
18.
Which earthquake waves are considered MOST DESTRUCTIVE?
A.
Surface waves
B.
Body waves
C.
P-waves
D.
S-waves
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ANSWER :
A. Surface waves