Gujarat Technological UniversityWinter 2025 examination

GTU 3150509 Fuels and Combustion Winter 2025 Question Paper & PDF

B.E. · Chemical Engineering · Semester 5 · Subject code 3150509
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Total
70 marks
To pass
23 marks (33%)
Duration
2.5 Hours 10:30 AM – 1:00 PM
Questions
5 with internal choice
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Q.1

14 Marks
(a)
3 marks
Draw a line diagram for the classification of fuel.
(b)
4 marks
Define octane number and cetane number and discuss their significance.
(c)
7 marks

Discuss in detail about the present scenario of crude oil refineries in India. Also, state the consumption pattern of petroleum crude in India.

Q.2

14 Marks
(a)
3 marks
Explain the term coal mining. Enlist various types of coal mining.
(b)
4 marks

Differentiate between direct and Indirect coal liquefaction processes with suitable examples.

(c)
7 marks

Enlist various coal combustion technologies. Explain circulating fluidized bed combustion technique for the combustion of bituminous coal.

(c)
7 marks

Describe briefly H-coal process. List out the advantages of ebulated bed reactor over the fixed bed reactor

Q.3

14 Marks
(a)
3 marks
Write short note on exploration of crude petroleum.
(b)
4 marks
Explain vis-breaking. Also list the various products of vis-breaking unit.
(c)
7 marks
Describe vacuum distillation unit with neat flow sheet for crude distillation.
(a)
3 marks
Write short note on improved oil recovery (IOR).
(b)
4 marks
Explain hydro-cracking. Also list the various products of hydro-cracking unit.
(c)
7 marks
Describe delayed coking process used in the petroleum refinery with neat flow sheet.

Q.4

14 Marks
(a)
3 marks
Define agro fuel with suitable examples.
(b)
4 marks
Explain the storage, handling and safety of water gas.
(c)
7 marks

Describe the synthesis of producer gas with all the chemical reactions involved and flow diagram.

(a)
3 marks
Define biogas with its chemical composition.
(b)
4 marks
Explain the storage, handling and safety of acetylene gas.
(c)
7 marks

Enlist the various methods for the production of hydrogen gas. Describe the steam reforming process for the synthesis of hydrogen with all the chemical reactions involved.

Q.5

14 Marks
(a)
3 marks
Enlist the various characteristics of an efficient furnace.
(b)
4 marks
State the two advantages and disadvantages of pulverized fuel firing.
(c)
7 marks

Write short note on adiabatic flame temperature, calorific value of coal, air to fuel ratio and dew point of products.

(a)
3 marks
Define oxy-rich combustion.
(b)
4 marks

Define turn down ratio of burner. State the various types of gas burner with their applications.

(c)
7 marks
Discuss the working and industrial application of traveling grate stoker boiler.

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About this paper

Official Gujarat Technological University (GTU) examination paper for Fuels and Combustion (Winter 2025, B.E. · Chemical Engineering, Sem 5). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.

Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.

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