Define fuel. Give its types.

1 Answer

Answer :

Fuel: A fuel can be defined as any combustible substance which during combustion gives large amount of heat energy.

Types:

1) Solid Fuels

2) Liquid Fuels

3) Gaseous Fuels.

Related questions

Description : Define corrosion. Give its types.

Last Answer : Corrosion: “Any process of chemical or electrochemical decay or destruction of a metal due to the action of surrounding medium is called as corrosion.” Types of corrosion: i) Atmospheric corrosion / Direct chemical / Dry corrosion ii) Immersed corrosion / Electrochemical corrosion / Wet corrosion

Description : Define lubricants. Gives its types.

Last Answer : Lubricant:- Any substance introduced between two moving or sliding surfaces to reduce the frictional resistance between them is known as a lubricant. Types of Lubricant:- i) Solid lubricant ii) Semi-solid lubricant iii) Liquid lubricant.

Description :  advantages and disadvantages of gaseous fuel.

Last Answer : Advantages:- 1) They have higher calorific value as compared to solid & liquid fuels. 2) They are easy to ignite & extinguish. 3) There combustion can readily controlled by the use of ... hence storage becomes costly. 4) They have very low ignition temp. Hence dangerous in storing & transporting

Description : characteristics of good fuel.

Last Answer : 1) It should have moderate ignition temperature. 2) It should have high calorific value. 3) It should possess moderate velocity of combustion. 4) It should have low contents of non-combustible ... 10) It should not undergo spontaneous combustion. 11) It should burn in air with efficiency.

Description : Define following: i) Oiliness ii) Volatility iii) Cloud point iv)Pour point

Last Answer : i) Oiliness: -It is defined as the power of an oil to maintain a continuous film under pressure while used a lubricant. ii) Volatility: - Volatility of oil is its tendency to vaporize with the ... iv) Pour point: It is defined as the temperature at which oil ceases to flow or pour on cooling

Description : Define heat treatment of steel.

Last Answer : Heat treatment:- The process of heating steel to a certain high temperature and then cooling it at a controlled rate in order to develop certain physical properties without changing its chemical composition is known as heat treatment of steel.

Description : Give reason galvanized containers are not used for storing food stuffs.

Last Answer : Galvanized container contains zinc coating. Since Zn is more active metal it readily reacts with the acids present in the food stuffs forming Zn compounds which are highly poisonous & it may poison the food stuffs. Therefore galvanized containers can not be used for storing food stuff.

Description : Write composition of steel. Explain its classification based on percentage of carbon.

Last Answer : Composition: Iron(Fe) - 98.5 to 99.95, Carbon(C) - 0.05 to 1.5 OR Steel consists Iron and Carbon Classification: 1) Mild or low carbon steel - (0.05-0.3%) - The variety of plain carbon ... - The variety of plane carbon steel, which consists of 0.6-1.5% of carbon, is known as high carbon steel.

Description : Explain following: i) Saponification ii) Emulsification.

Last Answer : i) Saponification:- It is the number of milligrams of KOH required to saponify 1 gm of oil.  A good lubricant should have moderate saponification value.  ii) Emulsification:- Certain oils have the ... in the refined form because in that case, the chances, of emulsion formation would be minimum. 

Description : Explain fluid - film lubrication with diagram.

Last Answer : Fluid film lubrication:  i) It is carried out by introducing the liquid lubricants in between the moving or sliding surface. The lubricant film covers the irregularities of the sliding or moving surface ... like watches, clocks, guns, sewing machines, scientific instrument etc.  Diagram

Description : Distinguish between Galvanizing and tinning. 

Last Answer : Galvanizing Tinning A process of covering iron or steel with a thin coat of Zinc to prevent it from rusting. A process of covering iron or steel with a thin coat of Tin to ... food stuff since Tin is nontoxic and protects the metal from corrosion and does not causes food poisoning.

Description : Explain metal cladding with labeled diagram.

Last Answer : Method : Metal cladding Process : i) Base metal is sandwiched or cladded between the two sheets of coating metal. ii) This sandwich is then passed through two heavy rollers maintained at high temp & ... Ni alloys, Cu & pb alloys & Pb alloys are used as cladding materials.

Description : Explain: i) Normalizing ii) Tempering

Last Answer : Normalizing:- It is similar to annealing. The process consists of heating the steel to a definite temperature about 500C above the critical temperature. Then it is allowed to cool freely in air. The cooling ... to a definite temperature (200 - 6000C) & then cooling it at a suitable rate.

Description : applications of bio-diesel

Last Answer : 1. It is an alternative fuel formulated exclusively for diesel engines with little or no modification in engines. 2. It is also used as a heating fuel in domestic & commercial boilers. 3. It is used in rocket fuels.

Description : functions of extenders. 

Last Answer : Function of extenders:- 1) They reduce the cost of paint. 2) They increase durability of paint 3) They help to reduce the cracking of dry paint. 4) They acts as carriers for pigmented colour.

Description : Name the metal oxide film which is more protective. Explain.

Last Answer : Stable -non - porous oxide film.  Explanation: Metals like Al forms Al2O3 whose volume is greater than the volume of metal (Al). An extremely tightly adhering, non- porous oxide layers is ... it forms a barrier for further action and hence the rate of oxidation of metal rapidly decreases. 

Description : Define fuel cell. Give the advantages and limitations of H2-O2 fuel cell.

Last Answer : Fuel cell: Fuel cell is an electrochemical cell which converts the chemical energy of fuel directly into the electrical energy by an electrochemical process, in which the fuel is oxidized at the anode. OR ... requires 30% of the stored energy. 7. Life span of the cells is not accurately known.

Description : Define fuel. Give the classification of fuel based on their occurrence with two examples of each type.

Last Answer : Fuel: A fuel can be defined as any combustible substance which during combustion gives large amount of heat energy.  Classification of Fuel : I) Primary or Natural Physical State i) Solid - e.g wood ... diesel oil, lubricating oil iii)Gaseous- e.g LPG, water gas ,producer gas ,coal gas, biogas