Coal is a black sedimentary rock. It usually occurs in coal beds found in coal mines. Coal comprises of carbon, hydrogen, oxygen, sulphur, etc. When dead plants and animals decay and convert into peat which in turn is converted into lignite, then subbituminous coal, after that bituminous coal, and lastly anthracite. Hence, coal is a fossil fuel.
UN climate summit begins in Dubai on 30 November and will readdress finance for loss and damage For almost three decades, world governments have met nearly every year to forge a global response to ...
Ans: Followings are the correct matching for the given items (a)(iii) (b)(iv) (c)(i) (d)(ii) Long Answer Questions. 27. Name the products obtained and their uses when coal is processed in industry. Ans: Following products can be obtained by processing coal in the industry (i) Coal tar used in making roads.
Answer: Coal when processed in industry gives coke, coal tar and coal gas. Coke is used in the manufacture of steel and in extraction of many metals. Coal tar is used as starting material for manufacturing various substances such as synthetic dyes, drugs, explosives, perfumes, paints, etc. Coal gas is used as a fuel. chevron right.
Engineering Chemistry Questions and Answers Coal Technology. This set of Engineering Chemistry Multiple Choice Questions Answers (MCQs) focuses on "Coal Technology". 1. How do the noncoking coals are subjected to consumers in India? a) By washing. b) By sizing. c) By sorting. d) By blending. View Answer.
It is obtained during the processing of coal to get coke. Coal gas contains a variety of gases like hydrogen, carbon monoxide, methane and some volatile hydrocarbons. It also contains small quantities of gases such as carbon dioxide and nitrogen. It is used as a fuel in many industries situated near the coal processing plants. Question 29.
Coal and Petroleum. 1. Read the following statements and select the correct ones. A. Coal, petroleum and natural gas are fossil fuels. B. Coal and natural gas are exhaustible resources. C. Coke is used in the manufacture of steel. D. Fossil fuels are present in limited quantities.
Here you can get Class 8 Important Questions Science based on NCERT Text book for Class 8. Science Class 8 Important Questions are very helpful to score high marks in board exams. Here we have covered Important Questions on Coal and Petroleum for Class 8 Science subject. Very Short Answer Questions. 1. Write the names of two natural substances.
We get Naphthalene ball from coal tar. Answer. 6. A good fuel must leave very little ash after burning. Answer. 7. Petroleum is found in pure form under the sedimentary rocks. Answer. We hope the given NCERT MCQ Questions for Class 8 Science Chapter 5 Coal and Petroleum with Answers Pdf free download will help you.
UNIT 1: COAL AND PETROLEUM PROCESSING. Coal and Petroleum are defined as follows: Coal is a natural black mineral which is a mixture of free carbon and compounds of carbon containing hydrogen, nitrogen, oxygen and sulfur. Petroleum is a complex mixture of saturated hydrocarbons mainly alkanes (paraffins) and cycloalkanes (naphthenes) with smaller amounts of alkenes and aromatics plus small ...
As grate moves along the length of the furnace, the coal burns before dropping off at the end as ash. Some degree of skill is required, particularly when setting up the grate, air dampers and baffles, to ensure clean combustion leaving the minimum of unburnt carbon in the ash. The coalfeed hopper runs along the entire coalfeed end of the furnace.
Minimising use of water for processing by reusing and recycling it. Smoke can be reduced by using oil or gas instead of coal in factories. Almost all machinery can be redesigned to increase energy efficiency and reduce noise. Question 37. Which is the most abundantly available fossil fuel in India? Mention its different forms. (2015 OD, 2014 OD ...
The course is aimed at more senior mineral processing personnel, and provides the student with a wider and more advanced scope regarding Coal Preparation and utilisation in general. It also prepares the student to play a more meaningful role in the management of the ore beneficiation environment. It is presented during four 3week study schools ...
Short Answer Type Questions. Question 1: Write some uses of coal. Answer: Uses of coal: ... Many useful products; like coke, coal tar and coal gas; are made by processing coal. Question 2: What is coke? Answer: Coke is almost pure form of carbon, is tough, porous and black. Coke is used in manufacture of steel and extraction of many metals.
Name three products obtained after the processing of coal. Also mention their uses. Ans. The slow process of conversion of wood into coal is called carbonisation. ... These are multiple choice questions or fillintheblanks, shortanswer questions, and longanswer questions. A few long answer questions are mentioned in the NCERT exercise ...
Transporting coal Coal can be transported from mines and processing plants to consumers in several different ways: Conveyors, trams, and trucks move coal around mines, short distances from mines to consumers close to the mines, or to other modes of longdistance transportation. How does coal get out of the ground?
Short Answer. Expert verified. ... or barges for transportation to coal processing plants or industrial locations. Transporting coal can be a challenging and costly process, as it often requires the construction of new infrastructure, such as railways and ports. ... Most popular questions from this chapter. Chapter 9.
Practice MCQ Questions for Class 8 Science with Answers on a daily basis and score well in exams. Refer to the Coal and Petroleum Class 8 MCQs Questions with Answers here along with a detailed explanation. Coal and Petroleum Class 8 MCQs Questions with Answers. Choose the correct option.
![Top 70 Boiler Questions and Answers [With PDF] Engineers Rail](/jzpf0os/330.jpg)
First, put vinegar and water in equal amounts and then run the boiler. This will swell the rusting from inside due to the steam formation and thus clean with hand by switching off the boiler. Q. How to bleed a boiler. Ans. Boiler flushing or boiler bleeding is a process of cleaning out the boiler inside and breaking out the jam inside the pipes.
Very Short Answer Type Questions. Question. 13 You are provided with a mixture of petroleum and water. Can you suggest a method to separate the two? ... Uses of coal gas It is used as a fuel in many industries situated near the coal processing plants. Question. 28 We say fossil fuels will last only for a few hundred years. Comment.
The LFC process consistently produced 250 short tons/day of PDF and 250 barrels/day of CDL from 500 short tons of runofmine coal per day. The PDF contains percent sulfur with a heat content of 11,100 Btu/lb (compared with percent sulfur and 8,300 Btu/lb for the feed coal) [ 1 ].
Sulfur dioxide, SO2, is a colorless gas or liquid with a strong, choking odor. It is produced from the burning of fossil fuels (coal and oil) and the smelting of mineral ores (aluminum, copper, zinc, lead, and iron) that contain sulfur. In nature, volcanic eruptions can release sulfur dioxide into the air.
The process of peat getting buried under sediments and turning into coal continues as a cycle, as long as the conditions are suitable. This is why we see numerous layers of coal seams in certain sedimentary basins. Types of Coal. The process by which something changes under the effect of pressure and temperature is known as metamorphism in geology.
Coal and Petroleum Class 8 Extra Questions Very Short Answer Questions. Coal And Petroleum Class 8 Extra Questions Question 1. Name some renewable sources of energy. Answer: Water, wind, solar. ... Question 9. The process of conversion of wood into coal is called (a) carbonisation (b) catagenesis (c) carboniferous (d) none of these.
Coal mines and coalpreparation plants have caused much environmental damage. Surface mining, or strip mining, destroys natural habitats, and one type of surface mining, known as mountaintop removal mining, dramatically and irreparably alters the topography of the area. Surface areas exposed during mining, as well as coal and rock waste (which were often dumped indiscriminately), weather ...
Question. The processing of raw coal involves "washing," in which coal ash (nonorganic, incombustible material) is removed. The article "Quantifying Sampling Precision for Coal Ash Using Gy's Discrete Model of the Fundamental Error" (Journal of Coal Quality, 1989:3339) provides data relating the percentage of ash to the density of a ...
© DZCrusher - كل الحقوق محفوظة
