Why supercritical boilers use less amount of steel compared to non-supercritical boilers ?

Why supercritical boilers use less amount of steel compared to non-supercritical boilers ?
by

1 Answer

Answer :

Supercritical boilers do not head heavy drum for separation of steam from mixture of water and steam
by

Related questions

Find false statement a. Tube of supercritical boilers are self-supporting b. Corners are easy to form c. Uniform heating of water takes place in supercritical boiler occurs d. All

Description : Find false statement a. Tube of supercritical boilers are self-supporting b. Corners are easy to form c. Uniform heating of water takes place in supercritical boiler occurs d. All

Last Answer : c. Uniform heating of water takes place in supercritical boiler occurs

Ultra supercritical boilers are mostly used in ______. a. Petrochemical industries b. Coal industries c. Textile industries d. none

Description : Ultra supercritical boilers are mostly used in ______. a. Petrochemical industries b. Coal industries c. Textile industries d. none

Last Answer : b. Coal industries

The fuel mostly used in steam boilers is  A. brown coal  B. peat  C. coking bituminous coal  D. non-coking bituminous coal

Description : The fuel mostly used in steam boilers is  A. brown coal  B. peat  C. coking bituminous coal  D. non-coking bituminous coal

Last Answer : Answer: D

Emission of dense white smoke out of the chimney of a thermal power plant is an indication of the use of (A) Less air for combustion (B) Correct amount of air for combustion (C) Too much air for combustion (D) Pulverised coal in boilers

Description : Emission of dense white smoke out of the chimney of a thermal power plant is an indication of the use of (A) Less air for combustion (B) Correct amount of air for combustion (C) Too much air for combustion (D) Pulverised coal in boilers

Last Answer : (C) Too much air for combustion

Why large boilers are water tube type ?

Description : Why large boilers are water tube type ?

Last Answer : Water tube boilers raise steam fast because of large heat transfer area and positive water circulation. Thus they respond faster to fluctuations in demand. Further single tube failure does not lead to catastrophy.

Induced draft fans provided in large thermal power plant boilers have __________ blades. (A) Forward curved (B) Backward curved (C) Double curved (D) Radial or straight

Description : Induced draft fans provided in large thermal power plant boilers have __________ blades. (A) Forward curved (B) Backward curved (C) Double curved (D) Radial or straight

Last Answer : (B) Backward curved

are portable devices capable of estimating the combusting efficiency of furnaces, boilers, or other fossil fuel burning machines. a) Sound analyzer. c) Combustion analyzer. b) Light analyzer. d)Temperature analyzer

Description : are portable devices capable of estimating the combusting efficiency of furnaces, boilers, or other fossil fuel burning machines. a) Sound analyzer. c) Combustion analyzer. b) Light analyzer. d)Temperature analyzer

Last Answer : Combustion analyzer. 

are portable devices capable of estimating the combusting efficiency of furnaces, boilers, or other fossil fuel burning machines. a) Sound analyzer. b) Light analyzer. c) Combustion analyzer. d) Temperature analyzer.

Description : are portable devices capable of estimating the combusting efficiency of furnaces, boilers, or other fossil fuel burning machines. a) Sound analyzer. b) Light analyzer. c) Combustion analyzer. d) Temperature analyzer.

Last Answer : Combustion analyzer.

Types of waste heat exchanger are: a) Regenerative and recuperative burners b) Economizers c) Waste heat boilers d) All of the above

Description : Types of waste heat exchanger are: a) Regenerative and recuperative burners b) Economizers c) Waste heat boilers d) All of the above

Last Answer : All of the above

In a power plant, coal is carried from storage place to boilers generally by means of (A) Bucket (B) V-belts (C) Trolleys (D) Manually.

Description : In a power plant, coal is carried from storage place to boilers generally by means of (A) Bucket (B) V-belts (C) Trolleys (D) Manually.

Last Answer : V-belts

supercritical boiler are use of………….. A. Thermal power. B. Electric power C. Solar power. D. Steam power

Description : supercritical boiler are use of………….. A. Thermal power. B. Electric power C. Solar power. D. Steam power

Last Answer : B. Electric power

The commonly used solvent in supercritical extraction is (A) Methyl ethyl ketone (B) Water (C) Carbon tetrachloride (D) Carbon dioxide

Description : The commonly used solvent in supercritical extraction is (A) Methyl ethyl ketone (B) Water (C) Carbon tetrachloride (D) Carbon dioxide

Last Answer : (D) Carbon dioxide

__________ number determines whether the fluid flow in an open channel is supercritical, critical or sub-critical. (A) Mach (B) Reynolds (C) Froude (D) Weber

Description : __________ number determines whether the fluid flow in an open channel is supercritical, critical or sub-critical. (A) Mach (B) Reynolds (C) Froude (D) Weber

Last Answer : (C) Froude

The world’s first boiler using supercritical technology was introduced by “B&W” in ______ a. 1948 b. 1936 c. 1928 d. 1957

Description : The world’s first boiler using supercritical technology was introduced by “B&W” in ______ a. 1948 b. 1936 c. 1928 d. 1957

Last Answer : d. 1957

The point of ultra-supercritical steam generator is to save on coal to heat the water and reduce ________ emissions. a. Oxygen (O2) b. Water (H2O) c. Carbon dioxide (CO2) d. Both ‘a’ and ‘c’

Description : The point of ultra-supercritical steam generator is to save on coal to heat the water and reduce ________ emissions. a. Oxygen (O2) b. Water (H2O) c. Carbon dioxide (CO2) d. Both ‘a’ and ‘c’

Last Answer : c. Carbon dioxide (CO2)

A ultra-supercritical steam generator operates at pressures above the critical pressure- a. 2400 psi b. 1500 psi c. 3200 psi d. 4600 psi

Description : A ultra-supercritical steam generator operates at pressures above the critical pressure- a. 2400 psi b. 1500 psi c. 3200 psi d. 4600 psi

Last Answer : c. 3200 psi

What type of boiler is supercritical boiler a. Drum type b. Once through type c. Both d. None

Description : What type of boiler is supercritical boiler a. Drum type b. Once through type c. Both d. None

Last Answer : b. Once through type

State disadvantage of Supercritical boiler. a. Corrosion problem b. Setting of material in feed lines can produce explosions c. Leakage problem d. All

Description : State disadvantage of Supercritical boiler. a. Corrosion problem b. Setting of material in feed lines can produce explosions c. Leakage problem d. All

Last Answer : d. All

Supercritical is ___% efficient than subcritical boiler. a. 42-47 b. 50-55 c. 32-38 d. More than 60

Description : Supercritical is ___% efficient than subcritical boiler. a. 42-47 b. 50-55 c. 32-38 d. More than 60

Last Answer : a. 42-47

Which type of generator is a type of boiler that at maximum critical pressure frequently used in the production of electric power. a. Supercritical boiler b. High pressure boiler c. Low pressure boiler d. None

Description : Which type of generator is a type of boiler that at maximum critical pressure frequently used in the production of electric power. a. Supercritical boiler b. High pressure boiler c. Low pressure boiler d. None

Last Answer : a. Supercritical boiler

________ terms are used to describe supercritical and ultra-supercritical coal generation by the coal industry. (a)High- efficiency and low -emissions (b)Low-efficiency and high- emissions (c) High-efficiency and high- emissions (d)Low-efficiency and low-emissions

Description : ________ terms are used to describe supercritical and ultra-supercritical coal generation by the coal industry. (a)High- efficiency and low -emissions (b)Low-efficiency and high- emissions (c) High-efficiency and high- emissions (d)Low-efficiency and low-emissions

Last Answer : (a)High- efficiency and low -emissions

A ultra-super critical boiler operates at…… a) artlU-Supercritical pressure b) Thermal pressure c) Critical pressure d) Atmospheric pressure

Description : A ultra-super critical boiler operates at…… a) artlU-Supercritical pressure b) Thermal pressure c) Critical pressure d) Atmospheric pressure

Last Answer : a) artlU-Supercritical pressure

Supercritical boiler generate___ to ___pressure. a) 22Mpa to 25Mpa b) 28Mpa to 20Mpa c) 23Mpa to 27Mpa d) 25Mpa to 28Mpa

Description : Supercritical boiler generate___ to ___pressure. a) 22Mpa to 25Mpa b) 28Mpa to 20Mpa c) 23Mpa to 27Mpa d) 25Mpa to 28Mpa

Last Answer : a) 22Mpa to 25Mpa

A supercritical boiler is one that operates above the pressure and temperature of following values a) 100 kg/cm² and 540°C b) 1 kg/cm² and 100°C c) 218 kg/cm² abs and 373°C d) 218 kg/cm² abs and 540°C

Description : A supercritical boiler is one that operates above the pressure and temperature of following values a) 100 kg/cm² and 540°C b) 1 kg/cm² and 100°C c) 218 kg/cm² abs and 373°C d) 218 kg/cm² abs and 540°C

Last Answer : c) 218 kg/cm² abs and 373°C

Use of pulverised coal in boilers provides (A) Higher calorific value (B) Better combustion (C) Smokeless burning (D) Less erosion on furnace wall

Description : Use of pulverised coal in boilers provides (A) Higher calorific value (B) Better combustion (C) Smokeless burning (D) Less erosion on furnace wall

Last Answer : (B) Better combustion

Which of the following is not applicable to fluidised bed combustion of coal? (A) It cannot burn low grade coal (B) It achieves higher fuel combustion efficiency (C) Less heat transfer surface area is required in boilers (D) None of these

Description : Which of the following is not applicable to fluidised bed combustion of coal? (A) It cannot burn low grade coal (B) It achieves higher fuel combustion efficiency (C) Less heat transfer surface area is required in boilers (D) None of these

Last Answer : (A) It cannot burn low grade coal

Why the work per kg of air flow in axial flow compressor is less compared to centrifugal compressor for same pressure ratio ?

Description : Why the work per kg of air flow in axial flow compressor is less compared to centrifugal compressor for same pressure ratio ?

Last Answer : Isentropic efficiency of axial flow compressor is higher.

The draft requirement in MB plough compared to disc plough for same depth of ploughing is: a) Less c) More b) Equal d) None of these

Description : The draft requirement in MB plough compared to disc plough for same depth of ploughing is: a) Less c) More b) Equal d) None of these

Last Answer : More

If both Stirling and Carnot cycles operate within the same temperature limits, then efficiency of Stirling cycle as compared to Carnot cycle  (a) more  (b) less  (c) equal  (d) depends on other factors  (e) none of the above.

Description : If both Stirling and Carnot cycles operate within the same temperature limits, then efficiency of Stirling cycle as compared to Carnot cycle  (a) more  (b) less  (c) equal  (d) depends on other factors  (e) none of the above.

Last Answer : Answer : c

An ideal gas as compared to a real gas at very high pressure occupies  (a) more volume  (b) less volume  (c) same volume  (d) unpredictable behaviour  (e) no such correlation.

Description : An ideal gas as compared to a real gas at very high pressure occupies  (a) more volume  (b) less volume  (c) same volume  (d) unpredictable behaviour  (e) no such correlation.

Last Answer : Answer : a

Pick out the wrong statement. (A) Weldability of high carbon steel is poorer compared to low carbon steel (B) Invar is a magnetic alloy (C) Magnetic permeability of the diamagnetic material is less than one (D) Martenistic transformation never goes to completion (i.e., 100%) at room temperature

Description : Pick out the wrong statement. (A) Weldability of high carbon steel is poorer compared to low carbon steel (B) Invar is a magnetic alloy (C) Magnetic permeability of the diamagnetic material is less than one (D) Martenistic transformation never goes to completion (i.e., 100%) at room temperature

Last Answer : Option B

Lacquer paints (A) Are generally applied on structural steel (B) Are less durable as compared to enamel paints (C) Consist of resin and nitro-cellulose (D) All the above

Description : Lacquer paints (A) Are generally applied on structural steel (B) Are less durable as compared to enamel paints (C) Consist of resin and nitro-cellulose (D) All the above

Last Answer : Answer: Option D

Why is the reward system so low compared to Q &A ? This means that the prizes of 2nd and 3rd are much less. When will the amount of prizes be increased more ?

Description : Why is the reward system so low compared to Q &A ? This means that the prizes of 2nd and 3rd are much less. When will the amount of prizes be increased more ?

Last Answer : answer:

Pick out the wrong statement (A) Low ozone layer thickness in polar regions is due to cold climatic conditions (B) Amount of unburnt hydrocarbons emitted by two stroke petrol engine is more as compared to that emitted by a four stroke engine (C) Carbon monoxide present in the two stroke petrol engine exhaust is much less as compared to that emitted from a four stroke engine (D) Mercury as a pollutant can enter the blood stream & the digestive system/ lungs and is responsible for causing Minamata disease

Description : Pick out the wrong statement (A) Low ozone layer thickness in polar regions is due to cold climatic conditions (B) Amount of unburnt hydrocarbons emitted by two stroke petrol engine is more ... can enter the blood stream & the digestive system/ lungs and is responsible for causing Minamata disease

Last Answer : (D) Mercury as a pollutant can enter the blood stream & the digestive system/ lungs and is responsible for causing Minamata disease

Why do plants have more dead tissues as compared to animals?OR Q: Why do plant tissue require less amount of energy in comparison to animal tissues?

Description : Why do plants have more dead tissues as compared to animals?OR Q: Why do plant tissue require less amount of energy in comparison to animal tissues?

Last Answer : Most of the plant tissues are dead, since dead cells can provide mechanical strength as easily as live ones, and need less maintenance. Also plants have sedentary life i.e. they are stationary. Therefore plant tissues require less amount of energy.

The springs A and B are identical except that A is stiffer than B, that is KA > kB. If both the springs are stretched by the same amount a.more work will be expended on A than B b.same work will be expended in both springs. c.less work will be expended on A than B d.107 dynes e.

Description : The springs A and B are identical except that A is stiffer than B, that is KA > kB. If both the springs are stretched by the same amount a.more work will be expended on A than B b.same work will be expended in both springs. c.less work will be expended on A than B d.107 dynes e.

Last Answer : a. more work will be expended on A than B

Why is induced draught considered better than the forced draught? a) Because power requirement is high for forced draught b) Maintenance of induced draught fan is costlier c) Forced draught is less efficient d) Forced draught produces less amount of speed of air

Description : Why is induced draught considered better than the forced draught? a) Because power requirement is high for forced draught b) Maintenance of induced draught fan is costlier c) Forced draught is less efficient d) Forced draught produces less amount of speed of air

Last Answer : Because power requirement is high for forced draught

The film co-efficient is decreased due to the presence of non-condensing gases in the vapors. The film co-efficient of superheated vapor as compared to that of saturated vapor is (A) More (B) Less (C) Some (D) Either more or less; depends on the nature of vapor

Description : The film co-efficient is decreased due to the presence of non-condensing gases in the vapors. The film co-efficient of superheated vapor as compared to that of saturated vapor is (A) More (B) Less (C) Some (D) Either more or less; depends on the nature of vapor

Last Answer : (C) Some

Combustion of pulverised coal as compared to that of lump coal (A) Develops a non-luminous flame (B) Develops a low temperature flame (C) Can be done with less excess air (D) Provides a lower rate of heat release

Description : Combustion of pulverised coal as compared to that of lump coal (A) Develops a non-luminous flame (B) Develops a low temperature flame (C) Can be done with less excess air (D) Provides a lower rate of heat release

Last Answer : (C) Can be done with less excess ai

What places use steam boilers?

Description : What places use steam boilers?

Last Answer : you mean the thing that creates a lot of steam? We use it to make cotton appear nice during a photo shoot. That thing can burn through skin!

Use of water having dissolved oxygen in boilers promotes (A) Corrosion (B) Sequestration (C) Scale formation(D) None of these

Description : Use of water having dissolved oxygen in boilers promotes (A) Corrosion (B) Sequestration (C) Scale formation (D) None of these

Last Answer : (A) Corrosion

Use of ______ is prohibited in process boilers. a. Use of a common gas b. combustion air control linkage c. jack shaft d. All of the above

Description : Use of ______ is prohibited in process boilers. a. Use of a common gas b. combustion air control linkage c. jack shaft d. All of the above

Last Answer : d. All of the above

Industrial boilers are closed vessels that use a fuel source or electricity to generate ________for industrial purposes. • Fuel Food • Steam

Description : Industrial boilers are closed vessels that use a fuel source or electricity to generate ________for industrial purposes. • Fuel Food • Steam

Last Answer : • Steam

Are the highest levels of sulfur dioxide are found near power plants refineries and industrial boilers?

Description : Are the highest levels of sulfur dioxide are found near power plants refineries and industrial boilers?

Last Answer : 1

Are the highest levels of sulfur dioxide are found near power plants refineries and industrial boilers?

Description : Are the highest levels of sulfur dioxide are found near power plants refineries and industrial boilers?

Last Answer : 1

Which is better boilers or gas furnaces?

Description : Which is better boilers or gas furnaces?

Last Answer : Furnaces heat air and distribute through the ducts in your home, while boilers heat water providing steam for heat. Both are similiar and can be energy effecient, depending which one you end up choosing. It really is a matter of preference, and of course the cost of installation.

Disadvantages of oil boilers?

Description : Disadvantages of oil boilers?

Last Answer : The main disadvantage of oil boilers is cost right now. Home heating oil is significnatly more expensive than gas right now. There is no increase risk of fire.

Do condensing boilers increase efficency?

Description : Do condensing boilers increase efficency?

Last Answer : Condensing boilers do work very well and are quite efficient. They will take several years to recoup their price, however. If it is only for savings, you should consider the length of time involved.

In a power plant, coal is carried from storage place to boilers generally by means of (A) bucket (B) V-belts (C) trolleys (D) manually.

Description : In a power plant, coal is carried from storage place to boilers generally by means of (A) bucket (B) V-belts (C) trolleys (D) manually.

Last Answer : Ans: B

The presence of which of the following salts in water causes corrosion in steam boilers? (1) Sodium Chloride (2) Magnesium Chloride (3) Calcium bicarbonate (4) Potassium bicarbonate

Description : The presence of which of the following salts in water causes corrosion in steam boilers? (1) Sodium Chloride (2) Magnesium Chloride (3) Calcium bicarbonate (4) Potassium bicarbonate

Last Answer : (2) Magnesium Chloride Explanation: Magnesium chloride is the name for the chemical compound with the formula MgCl2 and its various hydrates MgCl2(H2O)x. These salts are typical ionic halides, being highly soluble in water.