Preview (15 questions)
1 Question
30 секунд назад
Q.

In the Seismic refraction method, the _______ waves are picked up by Geophone.


Thermometer

Wave buoy

Radiating shock

2 Question
30 секунд назад
Q.

Seismic waves travel faster through less dense material.


True

False

3 Question
30 секунд назад
Q.

Earth has a layered structure is where seismic waves suddenly change paths when _________.


The density abruptly changes

Travel in straight lines

Refraction abruptly changes

4 Question
30 секунд назад
Q.

________ is used to record seismic waves.


Seisnoneter

Seismograph

Seismonomer

5 Question
30 секунд назад
Q.

Earth's mantle's density increases with depth which extends almost halfway to the center of the Earth.


True

False

6 Question
30 секунд назад
Q.

How are P waves?


Ultrasonic

Electromagnetic

Longitudinal

7 Question
30 секунд назад
Q.

Seismic waves are caused by ______.


Volcanoes

Earthquakes

Thunder

8 Question
30 секунд назад
Q.

The geophone cannot detect seismic refraction in a blind zone.


True

False

9 Question
30 секунд назад
Q.

The cone resistance is approximately equal to ______ times the penetration resistance N.


10

50

90

10 Question
30 секунд назад
Q.

The base of the cone is _______ cm in diameter in the Dutch cone test.


6.6

4.6

3.6

11 Question
30 секунд назад
Q.

The cone test is very useful in ________ soils.


Cohesion-less

Cohesive

Silty clay

12 Question
30 секунд назад
Q.

Are S waves Ultrasonic?


Yes

No

13 Question
30 секунд назад
Q.

S waves travel through ________.


Solids

Liquids

Both

14 Question
30 секунд назад
Q.

The speed of S waves and P waves cannot be recorded.


True

False

15 Question
30 секунд назад
Q.

________ are caused when the earth's plates rub together.


Earthquakes

Traffic

Rain