Learn Engineering Materials MCQ questions & answers are available for a Mechanical Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Engineering Materials MCQ question is the important chapter for a Mechanical Engineering and GATE students. Page-4 section-3

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The wind-caused etching or pitting of rock surfaces is termed: a. deflation b. slip face c. abrasion d. traction e. blow out View Answer Which one of the following statements concerning mechanical ...

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Aluminum is extracted from aluminum oxide by a process called electrolysis. First of all, aluminum oxide needs to be in molten form to extract the aluminum ions. Aluminum oxide, however, has a high melting point. Therefore, aluminum oxide is dissolved in molten cryolite. Cryolite is a form of an aluminum compound that has a lower melting point ...

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Answer: a Clarification: The main reaction occurring in the blast furnace during extraction of iron from haematite is: Fe 2 O 3 + 3CO → 2Fe + 3CO 2 This reaction involves the reduction of iron (III) oxide to iron and oxidation of carbon monoxide to carbon dioxide. 9. How is ore-dressing of iron done? a) Froth Flotation b) Magnetic separation ...

Pig iron is the iron obtained from blast furnace. It is 4% carbon and contains many other impurities like Si, P, S, Mn in lesser amounts. Cast iron is made by melting pig iron and coke with the help of a hot air blast. It has lower levels of carbon in it (3%). Unlike pig iron, cast iron is brittle and extremely hard. Q16.

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Spell. Test. PLAY. Match. Gravity. The nurse is one of several people who witness a vehicle hit a pedestrian at a fairly low speed on a small street. The individual is dazed and tries to get up, and the leg appears fractured. The nurse should plan to perform which action? Click card to see definition 👆.

Answer (1 of 3): Actually the basic need of coke is to reduce the Iron oxide to Iron. However Coke is also used to make Carbon dioxide which can trap heat. Carbon dioxide is a greenhouse gas and so it is better at trapping and retaining the heat required for melting the solid iron oxide. This in...

Answer : Iron losses depend on supply frequency and flux density in the core. For all normal operations, the frequency of flux reversals which is same as supply frequency is constant and the value of flux density more or less remains constant. Hence iron losses remain constant under all load conditions. i-e from no-load to full-load. Question 39.

3.(4 points) A student is given a 6.216 g mixture of iron filings, calcium chloride and sand. He separates the mixture and recovers 2.524 g of iron, 1.932 g of sand and 1.523 g of calcium chloride. Calculate the percentage of each component he recovered from the original mixture and the percent of material he lost during the separation process.

Select three ways in which steel differs from the iron produced in a blast furnace. Steel is not as brittle as pig iron. Steel has a lower carbon content. Steel is cheaper to produce than pig iron. Steel is more resistant to corrosion.

Practice Problems: Redox Reactions (Answer Key) Determine the oxidation number of the elements in each of the following compounds: a. H 2 CO 3 H: +1, O: -2, C: +4 b. N 2 N: 0 c. Zn(OH) 4 2-Zn: 2+, H: +1, O: -2 d. NO 2-N: +3, O: -2 e. LiH Li: +1, H: -1 f. Fe 3 O 4 Fe: +8/3, O: -2; Identify the species being oxidized and reduced in each of the ...

Procedure. Dip the head of a match in water to moisten it. Roll the damp match head first in sodium carbonate powder, then in iron (III) oxide powder. Hold the match in a pair of tongs. Put the head of the match into a blue Bunsen flame (air-hole open). The match will flare and burn.

E Traction Of Iron Smelting Roasting. step by step process for mining and eand traction of gold. steps involved in the eand traction of iron ore steps involved in stone crushingcharminar gold ore processing and eand traction stepsWhat is iron ore [More Info] Dynacor Gold Gold Ore Processing Therefore gold processing is a matter of great ...

iron oxide + carbon monoxide → iron + carbon dioxide Fe 2 O 3 + 3CO → 2Fe + 3CO 2. Iron from the blast furnace is an alloy of about 96 per cent iron with carbon and some other impurities. It is hard, but too brittle for most uses. So, most iron from the blast furnace is converted into steel by removing some of the carbon. Show Video

Cast iron has already been mentioned above. This section deals with the types of iron and steel which are produced as a result of the steel-making process. Wrought iron. If all the carbon is removed from the iron to give high purity iron, it is known as wrought iron. Wrought iron is quite soft and easily worked and has little structural strength.

See Answer. In simplest terms: grind the ore rock to powder, keep the powder that sticks to a magnet. Somewhat more detail: the large iron mining …

The extraction of iron in the blast furnace. Diagram showing the carbon extraction of iron . Raw Materials: Iron Ore (Haematite), Coke, Limestone and Air. Explanation: Iron Ore, Coke and Limestone are mixed together and fed into the top of the blast furnace. Hot air is blasted into the bottom of the blast furnace; Zone 1. Coke is used as the ...

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E Traction And Beneficiation Of Iron Ores And Minerals. companies for the e traction of mineral ores. Mining Techniques Types of MiningsMining Companies This process of extraction of ores and minerals from under the earth and then bringing to the land to its natural state involves a lot of processes When the ore is discovered from the site the loion and value of the ore is first ...

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2. If 50. J of heat are applied to 10. g of iron, by how much will the temperature of the iron increase? The specific heat of iron is 0.45 J/g oC. ∆t = q / m c ∆t =50. J / 10.g • 0.45 J/g oC = 50 J g oC = 11 oC 10.g • 0.45 J 3. Calculate the amount of energy required (in calories) to heat 145 g …

Mild steel is iron containing up to about 0.25% of carbon. The presence of the carbon makes the steel stronger and harder than pure iron. The higher the percentage of carbon, the harder the steel becomes. Mild steel is used for lots of things – nails, wire, car bodies, ship …

blast furnace – A tall oven used to extract iron from iron ore by burning it with carbon at high temperatures. cathode – The negative electrode used in electrolysis. electrolysis – The use of an electric current to separate out the elements in a compound. electrolyte – An ionic compound that conducts electricity when in a liquid state.

>> E Traction Methods Of Iron Ore Brazil; ... Extraction Of Iron Examples Answers Activities. The following diagram shows how iron is extracted from iron ore in a blast furnace. Scroll down the page for more explanations on extraction of iron. Extraction of iron Very unreactive metals are found directly in the ground as elements, eg. gold.

The wind-caused etching or pitting of rock surfaces is termed: a. deflation b. slip face c. abrasion d. traction e. blow out View Answer Which one of the following statements concerning mechanical ...

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Iron ores are reduced by coke (carbon) in a blast furnace. The process is summarised in the diagram below. Hottest part of the furnace At the bottom of the furnace, adjacent to the hot air blast entry points, the temperature reaches around 1800ºC, and represents the hottest part of the furnace. Ascending vertically, the furnace temperature…

ExtractionExtraction of Iron is done in many steps like oxidation, combustion, fusion, reduction, etc. During extraction cast iron is formed first which is …

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