FREE NACE Corrosion Control & Prevention Questions and Answers

Question 1

What is the primary purpose of cathodic protection in corrosion control?

Accepted Answer

To make the metal surface the cathode of an electrochemical cell

Answer

To increase metal thickness

Answer

To paint the metal surface

Answer

To increase electrical resistance

Question 2

Which type of corrosion occurs due to differences in metal composition?

Accepted Answer

Galvanic corrosion

Answer

Uniform corrosion

Answer

Pitting corrosion

Answer

Stress corrosion cracking

Question 3

What is the minimum protective potential for steel in seawater according to NACE standards?

Accepted Answer

-0.80 V vs. CSE

Answer

-0.50 V vs. CSE

Answer

-0.65 V vs. CSE

Answer

-1.20 V vs. CSE

Question 4

Which coating defect appears as small, blister-like formations?

Accepted Answer

Blistering

Answer

Cracking

Answer

Chalking

Answer

Peeling

Question 5

What is the purpose of an insulating flange in pipeline systems?

Accepted Answer

To prevent electrical continuity between pipeline sections

Answer

To increase flow rate

Answer

To reduce pipe diameter

Answer

To enhance thermal insulation

Question 6

Which NACE standard covers the selection of corrosion-resistant alloys?

Accepted Answer

NACE MR0175

Answer

NACE SP0169

Answer

NACE RP0188

Answer

NACE TM0102

Question 7

What is the primary cause of microbiologically influenced corrosion (MIC)?

Accepted Answer

Microbial activity producing corrosive metabolites

Answer

High temperature

Answer

Excessive cathodic protection

Answer

UV radiation

Question 8

Which instrument measures coating thickness non-destructively?

Accepted Answer

Coating thickness gauge

Answer

pH meter

Answer

Hygrometer

Answer

Anemometer

Question 9

What is the recommended maximum anode utilization factor for magnesium anodes?

Accepted Answer

85%

Answer

50%

Answer

100%

Answer

25%