JNTU
JNTU B.Tech II FUELS, FURNACES AND REFRACTORIES Previous Question Paper (December - 2017 - R13)
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. Each question carries 10 marks and may have a, b, c as sub questions.
Part A
Define carbonization.
Answer
Carbonization is the process of heating coal in the absence of air to a high temperature, resulting in its decomposition into solid coke, coal gas, and coal tar.
Write the differences between Fission and Fusion.
Answer
Nuclear fission involves the splitting of a heavy nucleus into two lighter nuclei, releasing energy and neutrons, whereas nuclear fusion involves the combining of two light nuclei to form a heavier nucleus, releasing significantly more energy.
What is meant by the term one dimensional when applied to conduction problems?
Answer
Sign in to view the complete answer paper.
What is meant by thermal contact resistance? Upon what parameters does this resistance depend?
Answer
Sign in to view the complete answer paper.
Mention heat output terms in a heat balance.
Answer
Sign in to view the complete answer paper.
Define sensible heat, latent heat and specific heat.
Answer
Sign in to view the complete answer paper.
Give some examples for base metal thermocouples.
Answer
Sign in to view the complete answer paper.
Write the merits and demerits of radiation pyrometer.
Answer
Sign in to view the complete answer paper.
Write the examples for basic refractories.
Answer
Sign in to view the complete answer paper.
What is neutral refractory? Give examples.
Answer
Sign in to view the complete answer paper.
Part B
Write the properties of metallurgical coke.
Answer
Sign in to view the complete answer paper.
Discuss the principles of production of fuel oils from crude.
Answer
Sign in to view the complete answer paper.
What is fissile fuel? Give examples.
Answer
Sign in to view the complete answer paper.
Discuss about testing of coke in detail.
Answer
Sign in to view the complete answer paper.
Write the properties and uses of blast furnace gas.
Answer
Sign in to view the complete answer paper.
Write the properties and uses of coke oven gas.
Answer
Sign in to view the complete answer paper.
Discuss the mechanism of heat conduction in solids.
Answer
Sign in to view the complete answer paper.
A temperature difference of 85 0C is impressed across a fiber glass layer of 13 cm thickness. The thermal conductivity of the fiber glass is 0.035 W/m 0C. Compute the heat transfer through the material per hour per unit area.
Answer
Sign in to view the complete answer paper.
Derive an expression for heat flow through compound walls.
Answer
Sign in to view the complete answer paper.
A hollow steel sphere contains 100 watt electrical filament inside it for heating. Find out the increase in the inside temperature of sphere, if it is lagged by 0.025 m thick magnesia of conductivity 0.055 kcal/hour/m2/0C while the surface film heat transfer coefficient remain unchanged.
Answer
Sign in to view the complete answer paper.
A furnace of 345 mm thick firebrick has an external temperature of 2300C when the furnace inside temperature is 11000C. Find the heat loss through the wall under this condition and the insulation thickness required to reduce the heat loss to 800 joules/m2 sec and the external temperature to 800C.
Answer
Sign in to view the complete answer paper.
What is shape factor? Explain.
Answer
Sign in to view the complete answer paper.
With a neat sketch discuss the construction and working of muffle furnace.
Answer
Sign in to view the complete answer paper.
Discuss in detail about continuous furnaces.
Answer
Sign in to view the complete answer paper.
Write the advantages of ceramic coating in furnaces.
Answer
Sign in to view the complete answer paper.
Explain about heat losses in furnaces.
Answer
Sign in to view the complete answer paper.
Discuss about heat balance in furnaces.
Answer
Sign in to view the complete answer paper.
Write the features of vertical shaft furnaces.
Answer
Sign in to view the complete answer paper.
Explain the construction and operation of optical pyrometer.
Answer
Sign in to view the complete answer paper.
Discuss about measurement of e.m.f by milli voltmeter.
Answer
Sign in to view the complete answer paper.
Write the uses of pyrometers.
Answer
Sign in to view the complete answer paper.
Explain the construction and operation of radiation pyrometer.
Answer
Sign in to view the complete answer paper.
Write the required properties of thermocouples.
Answer
Sign in to view the complete answer paper.
Write the applications of thermocouples.
Answer
Sign in to view the complete answer paper.
Discuss about manufacturing of magnesite refractory.
Answer
Sign in to view the complete answer paper.
Briefly discuss about testing of refractories.
Answer
Sign in to view the complete answer paper.
Define acid refractory.
Answer
Sign in to view the complete answer paper.
Discuss about manufacturing of chrome refractories.
Answer
Sign in to view the complete answer paper.
Explain the prevention methods of failure of refractories.
Answer
Sign in to view the complete answer paper.
Define basic refractory.
Answer
Sign in to view the complete answer paper.