Fuels, Furnace and Refractories Technology MCQ Questions and Answers | Metallurgical Engineering Page-4 section-1

31.
Hot gases from a furnace are entering at the base of a 30m high tubular vertical chimney at 600°C. The density of air and furnace gases at respective temperatures are 1.165 and 0.405 kgm^-3 respectively. The static draft produced by the chimney is . . . . . . . . Pa.

A. 2.3

B. 22.8

C. 223.6

D. 2193.3

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32.
Refractories are materials which

A. withstand high temperature

B. Don't fuse at high temperature

C. High thermal resistivity

D. All are correct

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33.
The fusion temperature of Chromite brick is

A. 3050°C

B. 1780°C

C. 1900°C

D. 2050°C

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34.
Which of the following is /are neutral refractories

A. Dolomite refractory

B. Silica refractory

C. Carbon block refractory

D. None of these

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35.
Pick up correct statement about Bessemer converter

A. It is an oldest process of steel making

B. It is a converter used to make steel

C. Air is supplied to converter to oxidize the impurities

D. All are correct

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36.
Fixed carbon in coal is defined as

A. that present in volatile matters

B. the total quantity of carbon present in ash

C. hundred minus the percentage of volatile matter ash & moisture

D. the one which is present in the residue after ash formed

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37.
Arrange the following refractory materials in ascending order of their melting points.
P. Alumina
Q. Silica
R. Carbon
S. Zirconia

A. R > P > Q > S

B. S > R > Q > P

C. R > S > P > Q

D. P > S > R > Q

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38.
Which type of fuel is used to heat the Blast furnace stove

A. Blast furnace gas

B. Mixed gas

C. Electrical energy

D. Both A and B

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39.
Oxygen percentage (by weight) in atmospheric air is

A. 19

B. 20

C. 21

D. 22

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40.
Those refractories which are neither attacked acid slag nor by basic slags are called

A. Basic refractories

B. Acidic refractories

C. Neutral refractories

D. None of these

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Fuels, Furnace and Refractories Technology MCQ Questions and Answers | Metallurgical Engineering

31. Hot gases from a furnace are entering at the base of a 30m high tubular vertical chimney at 600°C. The density of air and furnace gases at respective temperatures are 1.165 and 0.405 kgm-3 respectively. The static draft produced by the chimney is . . . . . . . . Pa.

Answer & Solution

32. Refractories are materials which

Answer & Solution

33. The fusion temperature of Chromite brick is

Answer & Solution

34. Which of the following is /are neutral refractories

Answer & Solution

35. Pick up correct statement about Bessemer converter

Answer & Solution

36. Fixed carbon in coal is defined as

Answer & Solution

37. Arrange the following refractory materials in ascending order of their melting points. P. Alumina Q. Silica R. Carbon S. Zirconia

Answer & Solution

38. Which type of fuel is used to heat the Blast furnace stove

Answer & Solution

39. Oxygen percentage (by weight) in atmospheric air is

Answer & Solution

40. Those refractories which are neither attacked acid slag nor by basic slags are called

Answer & Solution

31.
Hot gases from a furnace are entering at the base of a 30m high tubular vertical chimney at 600°C. The density of air and furnace gases at respective temperatures are 1.165 and 0.405 kgm^-3 respectively. The static draft produced by the chimney is . . . . . . . . Pa.

32.
Refractories are materials which

33.
The fusion temperature of Chromite brick is

34.
Which of the following is /are neutral refractories

35.
Pick up correct statement about Bessemer converter

36.
Fixed carbon in coal is defined as

37.
Arrange the following refractory materials in ascending order of their melting points.
P. Alumina
Q. Silica
R. Carbon
S. Zirconia

38.
Which type of fuel is used to heat the Blast furnace stove

39.
Oxygen percentage (by weight) in atmospheric air is

40.
Those refractories which are neither attacked acid slag nor by basic slags are called