Pitch (a byproduct of coal tar distillation) is blended with creosote oil prior to burner combustion because__________________?
Show answer Hide answer
Answer: C. It reduces viscosity and imparts fluidity for its transportation through pipelines at economic
Explanation
Coal tar pitch is extremely viscous and thick at ambient temperatures, making pipeline transport practically impossible. Blending pitch with creosote oil dramatically lowers its viscosity and imparts the necessary fluid mobility. This economical fluidization allows the blended fuel to be pumped easily through industrial pipeline networks. Pitch is a heavy residual byproduct obtained during the fractional distillation of industrial coal tar. Creosote oil acts as an effective solvent miscibility agent when mixed with heavy viscous hydrocarbon tars. Industrial burners require liquid fuels to possess controlled viscosity characteristics to achieve stable atomization.
Pitch actually possesses a very high calorific value, so blending is not done to increase its heat content. Tar does not serve to neutralize residual acids, as the primary purpose of blending is physical viscosity reduction. Claiming all options are correct is false because neutralizing residual acids is not the purpose of creosote blending.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
Related questions
Q1. Pig iron is manufactured in blast furnaces across India primarily employing the iron ore known as _______________?
Show answer Hide answer
Answer: A. Hematite
Hematite is an iron oxide mineral possessing high iron content and excellent reduction characteristics in blast furnaces. Indian steel plants rely extensively on domestic hematite ore deposits found in states like Odisha...
Q2. Plasticizers are incorporated into paints to______________________?
Show answer Hide answer
Answer: C. Give elasticity & prevent cracking of the film
Plasticizers are added to paint formulations to impart flexibility, elasticity, and prevent cracking of the dried film. As the paint binder dries, plasticizer molecules remain embedded to prevent the coating from becomin...
Q3. Identify the false statement regarding soap manufacturing?
Show answer Hide answer
Answer: A. Transparent soaps are made by cold process
Transparent soaps are typically manufactured using an alcohol-based boiling or semi-boiling process rather than a cold process. The cold process does not yield the clear microstructure required for light transmission in...
Q4. The platinum catalyst applied in earlier sulfuric acid production via the contact process suffered from drawbacks such as_________________?
Show answer Hide answer
Answer: D. All A, B. and C.
Platinum is an extremely expensive precious metal, making initial catalyst loading costs prohibitively high. Platinum catalyst gauzes or pellets are physically fragile and can degrade under harsh industrial reactor condi...
Q5. Polyvinyl chloride (PVC) is classified as a ______________ material ?
Show answer Hide answer
Answer: B. Thermoplastic
Polyvinyl chloride consists of linear polymer chains that soften significantly when heated and harden upon cooling. This reversible thermal softening behavior is the definitive characteristic classifying a polymer as a t...
Q6. Polymethyl methacrylate (PMMA) is commonly designated as ____________________?
Show answer Hide answer
Answer: C. Perspex
Polymethyl methacrylate (PMMA) is a transparent thermoplastic commonly known by trade names such as Perspex or Plexiglas. Commercial manufacturers market polymethyl methacrylate optical sheets under the well-established...