Free Printable ELECTRICAL METHODS (IP & SP)

1.

Which of these statements are TRUE for IP?

i. Saline water exhibit very high IP response

ii. Pyrite has higher chargeability than hematite

iii. IP effects increases with decreasing porosity

iv. IP effects decreases if water in the ground has a low conductivity

a)

i and iii

b)

i and iv

c)

iii and iv

d)

ii and iii

2.

Which of these statements are FALSE for IP?

i. Can be surveyed with various electrode configurations

ii. Cannot detect and characterize disseminated mineralizations

iii. IP effects is greater if the metallic ore or clay is massive

iv. IP effects decreases with increasing porosity

a)

i and iii

b)

i and iv

c)

iii and iv

d)

ii and iii

3.

Which one of these statements is FALSE?

a)

Time domain IP method measures the resulting voltage following a change in the injected current

b)

Injection currents for IP need to be much higher than normal DC resistivity measurement to ensure good voltage signals

c)

Time domain IP and Frequency domain IP used the same measurement device

d)

IP is sensitive to telluric noise

4.

All electrode arrays used for resistivity survey can be used for IP survey as well. But there is one electrode array that is the most commonly used for IP survey. This electrode array is

a)

Wenner array

b)

Dipole-dipole array

c)

Pole-dipole array

d)

Pole-pole array

5.

Which one of these has the lowest chargeability?

a)

Schist

b)

Alluvium

c)

Gravel

d)

Quartzites

6.

Small semi massive sulphide bodies generally have a high IP response.

a)

TRUE

b)

FALSE

7.

SP method is rank as the cheapest geophysical method.

a)

TRUE

b)

FALSE

8.

The same field set up of electrical resistivity can be used to acquire for IP data too.

a)

TRUE

b)

FALSE

9.

SP method does require electric current to be injected into the ground as in resistivity and IP methods.

a)

TRUE

b)

FALSE

10.

SP anomalies are often interpreted quantitatively.

a)

TRUE

b)

FALSE

11.

Some of the applications of SP are listed below EXCEPT:

a)

Mapping seepage flow

b)

Delineate shear zones

c)

Delineate near-surface zones

d)

Disseminated gold explorations

12.

If you are using zinc electrode for the SP survey, which saturated solution you should use?

a)

Copper sulphate

b)

Zinc sulphate

c)

Silver chloride

13.

Which of these statements are TRUE for SP?

i. Base electrode is positive and rover electrode is negative

ii. The porous pot have no effect on the SP readings

iii. Large negative SP anomalies can be observed particularly over deposits of pyrite, chalcopyrite and magnetite

iv. SP anomalies are often interpreted by its profile shape and its amplitude

a)

i and iii

b)

i and iv

c)

iii and iv

d)

ii and iii

14.

In ___________________ IP, it use alternating current (AC) to induce electric charges in the subsurface and the apparent resistivity is measured at different AC frequencies.

a)

Time domain

b)

Frequency domain

15.

What is the unit for chargeability?

a)

mhos/cm

b)

ms

16.

In SP, top of ore body is assumed to lie directly beneath the position of _________________ potential.

a)

Maximum

b)

Minimum

17.

Injected current for IP survey is the same as in resistivity survey.

a)

TRUE

b)

FALSE

18.

The principles types of source mechanism of SP are as follows EXCEPT:

a)

Electrokinetic potential

b)

Electric potential

c)

Electrochemical potential

d)

Mineral potential

19.

Which are the factors that affecting SP data?

i. Power lines

ii. Temperature

iii. Ground vibration

iv. Sunlight

a)

i, ii, and iii

b)

ii, iii, and iv

c)

i, ii, and iv

d)

All of the above

20.

SP anomalies are interpreted using these:

i. Profile shape

ii. Polarity

iii. Contour pattern

iv. Potential values

a)

i, ii, and iii

b)

ii, iii, and iv

c)

i, ii, and iv

d)

All of the above

ELECTRICAL METHODS (IP & SP)

Total questions: 20

Worksheet time: 11mins

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