Recent questions tagged ultra-supercritical-boiler

Description : Why is exhaust steam coming out of turbine is admitted to a steam header? A] To increase the pressure. B] To decrease the velocity C] To decrease the pressure drop. D] To control the pollution

Last Answer : C] To decrease the pressure drop.

Description : Among which locomotive steam engines have the highest efficiency? a) 1 MW b) 2 MW c) 30 MW d) 660 MW

Last Answer : d) 660 MW

Description : The thermal efficiency of a Watt’s Beam Engine is about? a) 50% b) 100% c) 5% d) 2%

Last Answer : d) 2%

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

Description : Higher plant efficiency up to______ over the entire load range. a. 30%-50% b. 20%-40% c. 60%-90% d. 50%-80%

Last Answer : a. 30%-50%

Description : Because less coal is consumed in this system, emissions of ______ and particulate and solid waste by products are reduced. a. Sulphur dioxide (SO2) b. Nitrogen oxide (NOx) c. Carbon dioxide (CO2) d. All of the above.

Last Answer : d. All of the above.

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)

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

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

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

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

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

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

Last Answer : b. Coal industries

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

Description : Yuhuan has ……. first 1000MW ultra-super critical pressure boiler. a) America b) China c) India d) Russia

Last Answer : b) China

Description : In ultra-super critical boiler technology the units run at about ……. efficiency. a) 40% b) 50% c) 55% d) 45%

Last Answer : d) 45%

Description : A ultra-super critical boiler technology is today the option of choice for most new……. fired power stations. a) Coal b) Natural gas c) Biogas d) Oil

Last Answer : a) Coal

Description : If ……. has a future, then ultra-super critical boiler will be the key. a) Coal b) Fossil fuels c) Natural gas d) Oil

Last Answer : a) Coal

Description : Philo unit 6 in ohio was built by ……. a) Thomas Savery b) Denis Papin c) Thomas Edison d) Babcock and Wilcox

Last Answer : d) Babcock and Wilcox

Description : A ultra-super critical boiler was developed in the US in ……. a) 1950s b) 1970s c) 1960s d) 1940s

Last Answer : a) 1950s

Description : A ultra-super critical boiler generates less emission per……of power output. a) Kilowatt b) Watt c) Megawatt d) Metric horse power

Last Answer : c) Megawatt

Description : Ultra-super critical boiler uses steam with very high temperature up to …… a) 980° b) 620° c) 550° d) 720°

Last Answer : b) 620°

Description : Industrial steam generators operate at a steam capacity of? (rra) 1300 kg/s (rrb) 1000 kg/s (rrc) 500 kg/s ( d) 125 kg/s

Last Answer : ( d) 125 kg/s

Description : The subcritical steam generators operate between a pressure ranges of? (rra) 120-160 bar (rrb) 100-110 bar ( c) 130-180 bar (rrd) 140- 200 bar

Last Answer : ( c) 130-180 bar

Description : Which of these is not a type of steam generator depending upon the kind of applications? (rra) utility steam generators (rrb) marine steam generators ( c) agricultural steam generators (rrd) industrial steam generators

Last Answer : ( c) agricultural steam generators

Description : In 1922,_____ was granted a patent for a boiler designed to convert at high pressure. (a)Mark Benson (b)James Watt (c) Alexander Graham Bell (d)Archimedes

Last Answer : (a)Mark Benson

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

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

Description : Which of the following needs to be incorporated to prevent the low pressure turbine exhaust wetness from being excessive? a) Double regeneration b) Double carbonization c) Double reheat d) Double cooling

Last Answer : c) Double reheat

Description : Who patent design for boiler. A. Mark Benson. B. Mark Zuckerberg C. Newton. D. C.N. Rao

Last Answer : A. Mark Benson

Description : Which type of boiler is used critical pressure……….. A. Benson boiler. B. Water tube boiler. C. Fire tube. D. Steam boiler

Last Answer : A. Benson boiler

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

Last Answer : B. Electric power

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

Description : The input to the low pressure feedwater heater is from? a) Drain heater b) Drain cooler c) Drain pipe d) None of the mentioned

Last Answer : b) Drain cooler

Description : The increment in thermal efficiency compared to the corresponding Subcritical cycle is gained at the expanse of? a) compactness of the plant b) simplicity of the plant c) complexity of the plant d) expanse of the plant

Last Answer : c) complexity of the plant

Description : What is the major disadvantage of the Benson boilers? a) Boiler is big in size b) Has large storage capacity c) Deposition of salts d) Bubble formation

Last Answer : c) Deposition of salts

Description : What is the capacity of Benson boiler? a) 180 tonnes/hr & above b) 150 tonnes/hr & above c) 250 tonnes/hr & above d) 300 tonnes/hr & above

Last Answer : b) 150 tonnes/hr & above

Description : What type of boiler is a Benson boiler? a) Super critical boiler b) Fire tube boiler c) Natural circulation boiler d) Over-through boiler

Last Answer : a) Super critical boiler

Description : In which year was Benson boiler was invented? a) 1918 b) 1920 c) 1921 d) 1922

Last Answer : d) 1922

Description : The input to the low pressure feed water heater is from? a) Drain heater b) Drain cooler c) Drain pipe d) None of the mentioned

Last Answer : b) Drain cooler

Description : In a typical layout of a 215MW reheat power plant, the feed in the boiler is at? a) 280 degree Centigrade b) 230 degree Centigrade c) 238 degree Centigrade d) 250 degree Centigrade

Last Answer : c) 238 degree Centigrade

Description : What is the critical point of steam generation in a “once through” boiler? a) 221.5 bar b) 221.4 bar c) 221.3 bar d) 221.2 bar

Last Answer : d) 221.2 bar

Description : Apart from feed heating, what should a plant have to obtain a gain in thermal efficiency? a) Lubrication b) Differential heating c) Reheating cycles d) Regenerative cycles

Last Answer : c) Reheating cycles

Description : Steam is generated in a _____ boiler at a pressure above the critical point. a) Simple b) once through c) Superficial d) thrice through

Last Answer : c) Superficial

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

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