250+ TOP MCQs on Completion Equipment – Corrosion and Answers

Petroleum Production Operations Multiple Choice Questions on “Completion Equipment – Corrosion”.

1. Acidic corrosion can be found to happen in Oil and Gas production wells?
a) True
b) False
Answer: a
Clarification: Yes, Acidic corrosion can be found to happen in Oil and Gas production wells. Acidic corrosion can happen due to the presence of Carbonic acid (from CO₂) or Organic acid within the hydrocarbon fluid.

2. Sulphide Stress Cracking/ Hydrogen Embrittlement can’t be found in corrosion in oil and gas.
a) True
b) False
Answer: b
Clarification: Sulphide Stress Cracking/ Hydrogen Embrittlement can be found in corrosion in oil and gas. It happens due to the presence of H₂S in the fluid. It can also be generated by the action of Sulfate-reducing bacteria in stagnant fluids e.g. in the annulus of casing-tubing.

3. What is the full form of CRA?
a) Corrosion Resistant Alloy
b) Corrosion Resistant to Alloy
c) Casing Resistant Alloy
d) Casing Recovering Assistant
Answer: c
Clarification: Instances the full form of CRA is Casing Resistant Alloy. In general 13%, Cr alloy casings and tubings are used to inhibit the corrosion. In some areas, 9% Cr alloy tubings are used to cut the price.

4. What does CSC mean in corrosion?
a) Calcium Stress Cracking
b) Casing Stress Cracking
c) Chromium Stress Cracking
d) Chloride Stress Cracking
Answer: d
Clarification: The full form of CSC is Chloride Stress Cracking. Under tensile stress, austenitic stainless steels may fail by cracking when exposed to saline water above 95°C.

5. Casing Integrity can be checked by ________
a) SP
b) Temperature Survey
c) Dual Latero Log
d) Neutron Porosity
Answer: b
Clarification: Casing Integrity can be checked by Temperature Survey. Wherever the leak or metal loss is there in the casing there exists a sharp change in temperature in the temperature log and we can easily detect the casing leak to check the casing integrity. SP, Latero log and Neutron porosity are different types of logs to see the porous and permeable formation, True resistivity and porosity respectively.