Metallurgical Analysis MCQ Questions and Answers

21

Organic sulphur present in coal is found out by

A) bomb calorimeter B) Eschka process C) deducting the inorganic sulphur from total sulphur D) Kjeldahl method

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Answer & Solution

Answer: Option C

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22

Dean and stark apparatus is used in the determination of . . . . . . . . content in liquid fuels.

A) sediment B) moisture C) ash D) sulphur

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Answer & Solution

Answer: Option B

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23

Pick out the wrong statement.

A) Total carbon content of coal as determined in its ultimate analysis is more than the fixed carbon content as determined in its proximate analysis B) Both the Eschka process and the bomb calorimeter process determine the total sulphur content of coal C) Sulphate sulphur in coal is never present as CaSO₄2H₂O and 0.5% D) Pyritic sulphur in coal is present between 0.2 to 0.3% and is generally present as FeS₂

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Answer & Solution

Answer: Option C

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24

A sampling tube known as a thief, which has two concentric and close fitting tubes with matching holes or opening, is used for the sampling of

A) molten metal and alloys B) sand and other fine materials C) ores containing metallics D) blast furnace grade coke

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Answer & Solution

Answer: Option B

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25

Loss on ignition (LOI) of iron ore is determined by finiding the loss in weight of the sample by heating it first to 500°C for 5 minutes followed by its heating at . . . . . . . . °C, for 30 minutes.

A) 250 B) 750 C) 950 D) 1150

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Answer & Solution

Answer: Option C

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26

Determination of methane present in coke oven gas by orsat apparatus, it is completely oxidised in contact with CuO to CO₂ and H₂O at a temperature of, . . . . . . . . . °C.

A) 350 B) 500 C) 800 D) 1050

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Answer & Solution

Answer: Option C

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27

Determination of alumina (AI₂O₃) in iron ore is based on the selective formation of AIPO₄ from its acidic solution (with cone, HCl) by the addition of

A) phosphoric acid B) calcium phosphate C) barium phosphate D) sodium or ammonium phosphate

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Answer & Solution

Answer: Option D

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28

Determination of ash content of coal during its proximate analysis, the temperature of weighed coal sample is raised to 400 - 500°C in half an hour and maintained at the same level for further half an hour. The temperature is then raised to . . . . . . . . °C at which the sample is heated for one more hour before weighing it.

A) 775 ± 25 B) 875 ± 25 C) 975 ± 25 D) 1075 ± 25

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Answer & Solution

Answer: Option A

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29

Eschka mixture used in total sulphur determination in coal comprises of a mixture of . . . . . . . . in 2 : 1 ratio by weight.

A) calcined MgO and anhydrous Na₂CO₃ B) calcined CaO and anhydrous Na₂CO₃ C) calcined MgO and anhydrous MgCO₃ D) calcined CaO and anhydrous MgCO₃

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Answer & Solution

Answer: Option A

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30

Coning and quartering is a well known process of the sampling of

A) ore, coal and coke B) molten metal C) solid metallic scrap D) fuel gases

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Answer & Solution

Answer: Option A

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Metallurgical Analysis MCQ Questions and Answers | Metallurgical Engineering