JNTU
JNTU B.Tech II FUELS, FURNACES AND REFRACTORIES Previous Question Paper (November/December - 2017 - R16)
This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit.
Part A
Where do the Deflection potentiometers used.
Answer
Deflection potentiometers are used in industrial process control and laboratory measurements where rapid, continuous monitoring of voltage or temperature is required, particularly in applications involving thermocouples and strain gauges where high precision is secondary to the speed of response.
What is shape factor? What is its importance?
Answer
The shape factor (or view factor) is a geometric parameter that represents the fraction of radiation leaving one surface that is intercepted by another surface. Its importance lies in its role in calculating radiative heat transfer between surfaces in an enclosure, as it accounts for the relative orientation and distance between them.
What is thermal resistance? How is it defined? What are its units?
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What is muffle furnace? Where it is preferred?
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Compare and contrast between acid, basic and neutral refractories.
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Verify the following:
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What do you mean by heat balance in a furnace?
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What are the noble metal thermocouples?
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What is pyrometric cone equivalent test?
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Explain Seebeck effect.
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Part B
Explain the production of metallurgical coke. Explain its composition and properties.
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Compare between conventional fuels and nuclear fuels.
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What is Blast furnace gas? How it is produced? Explain its composition.
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Develop an expression for the steady temperature distribution T(r) in a solid sphere of radius b, in which heat is generated at a rate of
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Derive an expression for heat conduction in a cylindrical coordinate system.
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What is Laplacian operator
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Derive an expression for heat conduction through anisotropic materials.
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Define furnace. How furnaces are classified? Explain them in detail.
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Distinguish between direct and indirect arc furnace.
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What are the advantages, drawbacks and applications of an electric furnace?
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Explain Peltier effect.
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What are the sources of error in radiation pyrometer? Discuss.
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What are base metal thermocouples and nobel thermocouples? Explain with examples.
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Explain the factors which affect the readings of optical pyrometer.
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Compare and contrast between acid, basic and neutral refractories.
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Distinguish between tridimite and crystabolite.
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Write short notes on the following:
Zirconia bricks
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Chromium bricks.
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