250+ TOP MCQs on Hydraulic Fracturing – Frac Job Evaluation Techniques and Answers

Petroleum Production Operations Multiple Choice Questions on “Hydraulic Fracturing – Frac Job Evaluation Techniques”.

1. Which of the following is correct regarding the corrosion inhibitors?
a) Used to limit the growth of microbes
b) Used to lower the surface tension
c) To protect casing and other equipment from corroding
d) Known as gelation chemicals

Answer: c
Clarification: Corrosion inhibitors are the chemicals that are used to prevent corrosion in the oil and gas equipment and facilities. It is mainly used to protect casing and other equipment from corroding in the oil industry.

2. Which of the following is correct regarding Glutaraldehyde?
a) Eliminates bacteria in the water that produces corrosive by-products
b) To protect casing and equipment from corroding
c) Known as gelation chemicals
d) Used to limit the growth of microbes

Answer: a
Clarification: Glutaraldehyde is an additive used in the hydraulic fracturing job that eliminates bacteria in the water that produces corrosive by-products. Glutaraldehyde is also a disinfectant used in the oil and gas industry.

3. Which of the following is correct regarding Quaternary Ammonium Chloride?
a) Known as gelation chemicals
b) To protect casing and equipment from corroding
c) Eliminates bacteria found in the water that produces corrosive by-products
d) Used to limit the growth of microbes

Answer: c
Clarification: Quaternary Ammonium Chloride is also known as quats. Quaternary Ammonium Chloride eliminates bacteria found in the water that produces corrosive by-products. Quaternary ammonium salts are used as surfactants which can lower the surface tension.

4. Which of the following is correct regarding Tetrakis Hydroxymethyl-Phosphonium Sulfate?
a) Known as gelation chemicals
b) Is a biocide that eliminates bacteria found in water
c) Eliminates oil from an emulsion
d) Used to limit the growth of microbes

Answer: b
Clarification: Tetrakis Hydroxymethyl-Phosphonium Sulfate is a chemical additive used in hydraulic fracturing job that is a biocide that eliminates bacteria found in the water that produces corrosive by-products.

5. Which of the following is correct regarding Ammonium Persulfate?
a) Known as gelation chemicals
b) Is a biocide that eliminates bacteria found in water
c) Eliminates oil from an emulsion
d) Allows a delayed break down of the gel

Answer: d
Clarification: Ammonium Persulfate is a chemical additive that allows delayed break down of the gel. Ammonium persulfate is the inorganic compound and it has the chemical formula (NH₄)₂S₂O₈.