Power Engineering MCQ: June 2017

Archive for June 2017

Natural gases will require ___ excess air than solid fuels.

Natural gases will require ___ excess air than solid fuels. A. Less B. More C. 90% D. 80% E. None of the above Answer:...

Which one is NOT the amount of excess air will depend on

Which one is NOT the amount of excess air will depend on A. Time available for the fuel to mix with the air B. Time available for the 2CO to mix...

The complete combustion of 1 kg of coal is 15kg and the actual amount of air used in the furnace is 22kg for every kg of coal, what is the excess air?

The complete combustion of 1 kg of coal is 15kg and the actual amount of air used in the furnace is 22kg for every kg of coal, what is the excess air? A....

The amount of excess air for proper combustion of fuel may vary from

The amount of excess air for proper combustion of fuel may vary from? A. 5 to 30% B. 15 to 60% C. 10 to 50% D. 10 to 60% E. 5 to 50% Answer:...

The balanced equation for the complete combustion of Sulphur is:

The balanced equation for the complete combustion of Sulphur is: a. S + O2 = SO2+ heat b. S + O3 = SO3 + heat c. S + 2O = S2O + heat d. 2S + O2 =...

Another name for hydrocarbons is?

Another name for hydrocarbons is? A. Volatile matter B. Strange matter C. Photonic matter D. Degenerate matter Answer:...

Which elements are combustible?

Which elements are combustible? A. Hydrogen, Carbon, Ash B. Moisture, Carbon, Sulphur C. Hydrogen, Carbon, Sulphur D. Hydrogen, Ash, Sulphur Answer:...

The refining process for fuel oils involves separating the crude oil into end products, which have distinguishing characteristics, such as specific gravity, viscosity, and:

The refining process for fuel oils involves separating the crude oil into end products, which have distinguishing characteristics, such as specific...

If there is insufficient combustion air to a boiler furnace, the result will be:

If there is insufficient combustion air to a boiler furnace, the result will be: a. High CO2 readings in the flue gas b. An increase in boiler efficiency c....

Which of the following substances is commonly found in fuel, but is non-combustible?

Which of the following substances is commonly found in fuel, but is non-combustible? a. CO b. H2 c. C d. H2O e. S Answer:...

The balanced equation for the complete combustion of hydrogen is:

The balanced equation for the complete combustion of hydrogen is: a. H2 + O = H2O + heat b. 2H + O2 = H2O + heat c. H2 + 2O2 = 2H2O + heat d. 2H2...

The complete combustion of carbon is represented by the balanced equation C + O2 =:

The complete combustion of carbon is represented by the balanced equation C + O2 =: a. CO b. CO + heat c. CO2 + heat d. 2CO2 e. 2C + 2O Answer:...

Which of these is NOT used for burning coal?

Which of these is NOT used for burning coal? a. Under feed stoker b. Rotary cup stoker c. Cross feed stoker d. Over feed stoker e. Chain grate stoker Answer:...

Carbon that is not combined with hydrogen is referred to as:

Carbon that is not combined with hydrogen is referred to as: a. Mono-carbon b. Loose carbon c. Separated carbon d. Free carbon e. Fixed carbon Answer:...

With respect to boiler combustion, an exhauster fan:

With respect to boiler combustion, an exhauster fan: a. Is the same as an ID fan b. Extracts ash from a hopper c. Extracts solid particles from flue...

Which of the following is NOT necessary for complete combustion of a fuel?

Which of the following is NOT necessary for complete combustion of a fuel? a. Enough air must be supplied b. The temperature of the furnace must...

A mechanical atomizing burner has oil pumped under high pressure through a:

A mechanical atomizing burner has oil pumped under high pressure through a: a. Rotary cup b. Ring burner c. Multi-spud burner d. Sprayer plate e....

One advantage of oil over coal as a fuel is that oil:

One advantage of oil over coal as a fuel is that oil: a. Burns cleaner b. Is more abundant c. Is less expensive d. Requires no storage space e. Has...

The amount of air required to supply just enough oxygen for complete combustion is called the:

The amount of air required to supply just enough oxygen for complete combustion is called the: a. Minimum air b. Perfect air c. Primary air d. Theoretical...

The purpose of the combustion controls on a boiler is to:

The purpose of the combustion controls on a boiler is to: a. Maintain the proper ratio of combustion air to flue gas b. Maintain a constant fuel...

The amount of excess air required for combustion in a boiler furnace is determined by the:

The amount of excess air required for combustion in a boiler furnace is determined by the: a. Ambient temperature of the outside air b. Air supply...

The balanced equation for the incomplete combustion of carbon is:

The balanced equation for the incomplete combustion of carbon is: a. C + O2 = CO2 + heat b. 2C + O2 = CO + heat c. C + 2O2 = 2CO + heat d. 2C + 2O2...

Before an oil burner is removed from a boiler furnace, the burner should be blown out with:

Before an oil burner is removed from a boiler furnace, the burner should be blown out with: a. Solvent b. Coal oil c. High temperature solvent d....

The stack temperature of a boiler can rise if:

The stack temperature of a boiler can rise if: a. Excess air is reduced b. The waterside of the boiler becomes cleaner c. The fireside of the boiler...

In North America, a major disadvantage of oil over coal is that oil:

In North America, a major disadvantage of oil over coal is that oil: a. Does not burn as clean b. Is more difficult to control c. Is more expensive...

When a gas-fired burner is operating properly:

When a gas-fired burner is operating properly: a. The flame will be blue with short yellow tips b. The furnace will pulsate c. There will be no turbulence d....

The approximate amount of excess oxygen for combustion of a gaseous fuel is:

The approximate amount of excess oxygen for combustion of a gaseous fuel is: a. 10% b. 7% c. 5% d. 15% e. 2% Answer:...

Combustion of fuel in a boiler furnace:

Combustion of fuel in a boiler furnace: a. Requires a higher air-fuel ratio than a diesel engine b. Requires a higher air-fuel ratio than a gas turbine c....

A boiler with only an induced draft fan:

A boiler with only an induced draft fan: a. Will have a negative furnace pressure b. Is extremely inefficient c. Needs a very tall stack d. Will...

Boiler chimneys are commonly lined with:

Boiler chimneys are commonly lined with: a. Concrete b. Rubber c. Fire brick d. Mortar e. Insulation Answer:...

A characteristic of mechanical draft is that the draft:

A characteristic of mechanical draft is that the draft: a. Varies with atmospheric pressure b. Varies with chimney height c. Varies with chimney temperature d....

Boiler combustion is regulated by:

Boiler combustion is regulated by: a. Varying the speed of an ID fan b. Controlling or regulating the fuel flow c. Varying the speed of an FD fan d....

Natural draft is produced in a boiler furnace when:

Natural draft is produced in a boiler furnace when: a. Hot flue gases contract so that each cubic meter has more mass b. Gases in the stack have less...

Induced draft may be accomplished by a:

Induced draft may be accomplished by a: a. Steam jet b. Barometric damper c. Tall chimney d. Wind box e. Velocity stack Answer:...

When an air heater is used in a boiler:

When an air heater is used in a boiler: a. The forced draft fan supplies hot gases to the air heater b. The induced draft fan supplies combustion...

The inclined tube manometer:

The inclined tube manometer: a. Uses pressure to tilt a common "U" tube manometer, making it more accurate and easier to read b. Can only measure...

In a forced draft system, the furnace pressure is:

In a forced draft system, the furnace pressure is: a. Above atmospheric pressure b. Below atmospheric pressure c. At atmospheric pressure d. Measured...

An induced draft fan:

An induced draft fan: a. Is physically smaller than a forced draft fan b. Has less expensive materials of construction than an FD fan c. Operates...

A diaphragm type pressure gauge:

A diaphragm type pressure gauge: a. Is used to measure high pressures b. Operates on a mercury column c. Cannot be used for pressures greater than...

When draft is produced by natural means:

When draft is produced by natural means: a. Hot air surrounding the boiler increases draft b. Fans control the flue gas flow c. A short stack is...

With an axial flow fan, the air flow:

With an axial flow fan, the air flow: a. Is at right angles to the windbox b. Is at right angles to the shaft c. Does not come in contact with driving...

A more durable chimney for a power plant application is the _____ chimney.

A more durable chimney for a power plant application is the _____ chimney. a. Brick b. Reinforced concrete c. Steel d. Insulated e. Guy wire supported Answer:...

In a balanced draft system, the air heater is located:

In a balanced draft system, the air heater is located: a. Between the economizer and the superheater b. Between the forced draft fan and the superheater c....

Primary air:

Primary air: a. Is supplied in the combustion zone b. Is the same as excess air c. Is supplied with all types of burners d. Is premixed with fuel...

Inlet damper control on a fan:

Inlet damper control on a fan: a. Requires more power to drive the fan when the vanes are closed. b. Requires less power to drive the fan at reduced...

The most efficient operation of a fan demands that:

The most efficient operation of a fan demands that: a. The speed be only high enough to supply the required amount of air b. Inlet damper controls...

With fan output damper control:

With fan output damper control: a. The fan air pressure decreases with a decrease in air flow b. The fan air pressure increases with a decrease in...

Which code specifies standards for the air openings required into a boiler room when the boiler is burning gas?

Which code specifies standards for the air openings required into a boiler room when the boiler is burning gas? A. CSA B-52 B. ASME Section 1 C. CSA...

Which code specifies standards for the air openings required into a boiler room when the boiler is burning oil?

Which code specifies standards for the air openings required into a boiler room when the boiler is burning oil? A. CSA B-52 B. ASME Section 1 C....

A diaphragm draft gauge indicates pressure in?

A diaphragm draft gauge indicates pressure in? A. Kilopascals B. Millimeters C. Centimeters D. Pascals Answer:...

The inclined tube manometer advantages over the U tube manometer is?

The inclined tube manometer advantages over the U tube manometer is? A. Easier to read the scale B. Gives an more accurate reading C. Read higher...

In a balanced draft system, the control for the induced draft fan is?

In a balanced draft system, the control for the induced draft fan is? A. Combustion control system B. Furnace pressure C. Variable speed Coupling D....

The combustion control system dictates the amount of steam being produced by sensing?

The combustion control system dictates the amount of steam being produced by sensing? A. Steam pressure required B. Fuel required C. Air flow required D....

Cost for this system is high, but gives excellent fan speed control , and requires the least amount of energy compared to any other type of control.

Cost for this system is high, but gives excellent fan speed control , and requires the least amount of energy compared to any other type of control. A....

Using the inlet damper control

Using the inlet damper control A. Reduces pollution B. Less power required C. More power required D. None of the above Answer:...

The damper for controlling the combustion air flow.

The damper for controlling the combustion air flow. A. Fan speed control B. Inlet damper control C. Outlet Damper Control D. Air register Answer:...

The damper that restricts the fan output to any desired quantity.

The damper that restricts the fan output to any desired quantity. A. Fan speed control B. Inlet damper control C. Outlet Damper Control D. Air register Answer:...

A steam turbine drives the fan and an automatic control system is used to regulate the steam flow to the turbine by means of a?

A steam turbine drives the fan and an automatic control system is used to regulate the steam flow to the turbine by means of a? A. Fan speed control B....

When draft is produced by natural means, the flow is controlled by?

When draft is produced by natural means, the flow is controlled by? A. Fan speed control B. Inlet damper control C. Variable speed coupling D. Air...

What can happen to an induced draft fan when burning solid fuels?

What can happen to an induced draft fan when burning solid fuels? A. Impeller may be subjected to corrosive action B. Impeller may overheat C. None...

Advantages of the induced draft fan over the forced draft fan?

Advantages of the induced draft fan over the forced draft fan? A. Maintains the furnace pressure below atmospheric B. Furnace inspection and burner...

Advantages of the forced draft fan over the induced draft fan?

Advantages of the forced draft fan over the induced draft fan? A. Longer fan life B. Smaller size fan C. Less power required D. All of the above Answer:...

What is an advantage of Mechanical Draft over Natural Draft?

What is an advantage of Mechanical Draft over Natural Draft? A. Less equipment B. Independent of chimney temperatures C. No electricity required D....

Why isn't a forced draft fan used when burning solid fuels?

Why isn't a forced draft fan used when burning solid fuels? A. Creates a positive pressure B. More expensive C. Higher maintenance requirements D....

Why isn't a induced draft fan used when burning natural gas or liquids?

Why isn't a induced draft fan used when burning natural gas or liquids? A. More expensive B. Higher maintenance requirements C. Hard to clean D. All...

When burning natural gas or liquid fuels only what system is used?

When burning natural gas or liquid fuels only what system is used? A. Induced draft system B. Forced draft system C. Balanced draft system D. None...

If efficiency is not important in burning solid fuels, what system is used?

If efficiency is not important in burning solid fuels, what system is used? A. Induced draft system B. Forced draft system C. Balanced draft system D....

To increase efficiency of burning solid fuels which system is used?

To increase efficiency of burning solid fuels which system is used? A. Induced draft system B. Forced draft system C. Balanced draft system D. None...

When burning solid fuels a ___ is normally used.

When burning solid fuels a ___ is normally used. A. Induced draft system B. Forced draft system C. Balanced draft system D. A and B Answer:...

When burning solid fuels a ___ furnace pressure is required to keep hot gases from being expelled through openings.

When burning solid fuels a ___ furnace pressure is required to keep hot gases from being expelled through openings. A. Negative B. Positive C. Equal D....

Balanced draft system is mostly used for?

Balanced draft system is mostly used for? A. Smaller sized boilers B. Medium sized boilers C. Large sized boilers D. All of the above Answer:...

In a balanced draft system the induced draft fan removes the flue gases, keeping the furnace pressure slightly ___ atmospheric.

In a balanced draft system the induced draft fan removes the flue gases, keeping the furnace pressure slightly ___ atmospheric. A. Above B. Below C....

A system that that forces air into the furnace where combustion gases are removed by natural or mechanical means

A system that that forces air into the furnace where combustion gases are removed by natural or mechanical means A. Induced draft system B. Forced...

Axial Flow Fan is used on?

Axial Flow Fan is used on? A. Smaller sized boilers B. Medium sized boilers C. Large sized boilers D. All of the above Answer:...

Which one is NOT a function of louvers?

Which one is NOT a function of louvers? A. Gives air a swirling motion in order to obtain better mixing of fuel and air B. Shuts off the air supply...

Another name for Louvers?

Another name for Louvers? A. Windbox B. Dampers C. Forced air fan D. None of the above Answer:...

The lower duct passes underneath the boiler floor and is connected at the front to a ____ which distributes the air to a number of burners.

The lower duct passes underneath the boiler floor and is connected at the front to a ____ which distributes the air to a number of burners. A. Windbox B....

The forced draft fan is connected to the lower duct which conveys the air through an ____ to preheat the air before it is admitted to the burners.

The forced draft fan is connected to the lower duct which conveys the air through an ____ to preheat the air before it is admitted to the burners. A....

The forced draft system casing is under ____ pressure.

The forced draft system casing is under ____ pressure. A. Negative pressure B. Positive pressure C. Equal pressure D. None of the above Answer:...

Forced draft fan quantity of air admitted is usually regulated by?

Forced draft fan quantity of air admitted is usually regulated by? A. Ductwork B. Steam jet C. Damper D. Fans Answer:...

Forced draft fan delivers air to the furnace by means of?

Forced draft fan delivers air to the furnace by means of? A. Ductwork B. Steam jet C. Damper D. Fans Answer:...

Forces air into the furnace

Forces air into the furnace A. Induced draft fan B. Steam jet C. Forced draft fan D. Fan Answer:...

An induced draft fan may be driven by what?

An induced draft fan may be driven by what? A. Steam turbine B. Motor C. Centrifugal motion D. All of the above E. A and B Answer:...

An induced draft fan is located where?

An induced draft fan is located where? A. Near the furnace inlet B. Near the furnace outlet C. Near the superheater D. None of the above E. A and C Answer:...

Gases from the boiler are drawn into the inner core of the impeller from both sides. They are accelerated by a rotating wheel and are discharged into a casing at high velocity. What device is this?

Gases from the boiler are drawn into the inner core of the impeller from both sides. They are accelerated by a rotating wheel and are discharged into...

A partial vacuum in the furnace is created by?

A partial vacuum in the furnace is created by? A. Fan B. Steam jet C. Double suction induced draft fan D. Venturi tube Answer:...

Velocity of gases in the chimney is increased by a partial vacuum in the furnace which increases air flow into the furnace. This is done by?

Velocity of gases in the chimney is increased by a partial vacuum in the furnace which increases air flow into the furnace. This is done by? A. Steam...

Which one is NOT part of Mechanical Draft Equipment?

Which one is NOT part of Mechanical Draft Equipment? A. Induced Draft Fan B. Chimney C. Forced Draft Fan D. Balanced Draft System Answer:...

What is done to reduce cost and weight of the steel chimney?

What is done to reduce cost and weight of the steel chimney? A. Lining may extend to only one third of the total length B. Lining may extend to only...

What are the disadvantages of the steel chimney?

What are the disadvantages of the steel chimney? A. Requires lots of maintenance B. Requires lots of refractory lining C. High cost to build D. All...

What are the advantages of the steel chimney?

What are the advantages of the steel chimney? A. First low cost B. Light construction C. Constructed on the same structure that carries the weight...

Which chimney is the most popular one?

Which chimney is the most popular one? A. Reinforced concrete chimney B. Brick chimney C. Steel chimney D. Copper chimney Answer:...

Which material is not heat resistant and the chimney needs a clay lining if this material is used?

Which material is not heat resistant and the chimney needs a clay lining if this material is used? A. Reinforced concrete B. Brick C. Steel D. None...

Which material is more durable for a chimney?

Which material is more durable for a chimney? A. Reinforced concrete B. Brick C. Steel D. None of the above Answer:...

Chimneys are commonly constructed of?

Chimneys are commonly constructed of? A. Reinforced concrete B. Brick C. Steel D. All of the above E. A and C Answer:...

Dust collectors may remove as much as __ of the dust from the flue gases emitted from the furnace.

Dust collectors may remove as much as __ of the dust from the flue gases emitted from the furnace. A. 99% B. 94% C. 98% D. 95% Answer:...

For coal and other solid fuel-fired furnaces, and are installed in the flue gas ductwork before the flue gas enters the stack.

For coal and other solid fuel-fired furnaces, ____ and ____ are installed in the flue gas ductwork before the flue gas enters the stack. A. fans,...

A taller stack will

A taller stack will A. Increase natural draft B. Disperse dust and smoke C. Increase resistance to air flow D. All of the above Answer:...

Increasing the stack temperature has a draw back which is?

Increasing the stack temperature has a draw back which is? A. More pollution B. More heat C. Heat loss D. Frictional resistance Answer:...

Which season is the best for draft conditions?

Which season is the best for draft conditions? A. Winter B. Summer C. Spring D. Fall Answer:...

Which method is NOT a way to increase the pressure differential between the pressure at the furnace inlet and the pressure at the furnace exit?

Which method is NOT a way to increase the pressure differential between the pressure at the furnace inlet and the pressure at the furnace exit? A....

The pressure due to the column of colder air entering the furnace will be _____ the pressure due to the mass of the column of the lighter, heated gases at the base of the chimney.

The pressure due to the column of colder air entering the furnace will be _____ the pressure due to the mass of the column of the lighter, heated gases...

Hot gases in the stack, or chimney, will have ___ mass than a column of equal height of the outside colder air.

Hot gases in the stack, or chimney, will have ___ mass than a column of equal height of the outside colder air. A. More B. Less C. Equal the D. None...

When gas is heated, it tends to expand so that each has _ than it did before heating.

When gas is heated, it tends to expand so that each __ has ___ than it did before heating. A. Cubic meter, less mass B. Cubic meter. more mass C....

Air Admitted above the bed is called?

Air Admitted above the bed is called? A. Undergrate Air B. Underfire Air C. Overfire Air D. Tertiary Air Answer:...

With solid fuel fired systems, where the fuel is burned in a bed on grates, air that is introduced under the grates may be called?

With solid fuel fired systems, where the fuel is burned in a bed on grates, air that is introduced under the grates may be called? A. Undergraduate...

An additional layer of air is introduced at the end of the combustion zone to ensure that the fuel is burned completely. This is referred to as?

An additional layer of air is introduced at the end of the combustion zone to ensure that the fuel is burned completely. This is referred to as? A....

Secondary air is given ___ rotation.

Secondary air is given ___ rotation. A. Clockwise B. Counter Clockwise C. A and B D. None of the above Answer:...

Primary air is given ___ rotation.

Primary air is given ___ rotation. A. Clockwise B. Counter Clockwise C. A and B D. None of the above Answer: ...

The remaining air necessary for complete combustion.

The remaining air necessary for complete combustion. A. Draft B. Primary Air C. Secondary Air D. Overfire Air Answer:...

Refers to the air which may be premixed with the fuel before being admitted to the furnace.

Refers to the air which may be premixed with the fuel before being admitted to the furnace. A. Draft B. Primary Air C. Secondary Air D. Overfire Air Answer:...

The part of a tree most adversely affected by acid rain is the:

The part of a tree most adversely affected by acid rain is the: a. Leaves b. Branches c. Roots d. Reproductive system e. Bark Answer:...

Hydrogen is considered ideal as an alternative fuel because:

Hydrogen is considered ideal as an alternative fuel because: a. It burns at low temperatures, minimizing NOx formation b. It has nearly the same heating...

Ozone is particularly hazardous in:

Ozone is particularly hazardous in: a. The stratosphere b. The upper atmosphere c. All levels of the atmosphere d. All concentrations e. The lower...

The greenhouse effect is responsible for:

The greenhouse effect is responsible for: a. Heart and circulatory system strain b. The diminishing maple sugar industry c. Drought conditions d....

Nitrogen oxides are referred to collectively as:

Nitrogen oxides are referred to collectively as: a. Laughing gases b. NO2 c. N2O d. NOX e. N2O5 Answer:...

The gaseous pollutant that contributes to acid rain is:

The gaseous pollutant that contributes to acid rain is: a. Ozone b. Carbon dioxide c. Carbon monoxide d. Mercaptan e. Sulphur dioxide Answer:...

Incomplete combustion of fuel is responsible for the production of:

Incomplete combustion of fuel is responsible for the production of: a. Acid Rain b. Carbon dioxide c. Hydrogen sulphide d. Sulphur dioxide e. Carbon...

The dual register burner reduces nitrogen oxides in the flue gas by:

The dual register burner reduces nitrogen oxides in the flue gas by: a. Reducing turbulence and combustion temperatures. b. Using maximum excess air...

Regenerable systems used for flue gas desulphurization:

Regenerable systems used for flue gas desulphurization: a. Are less expensive than non-regenerable methods b. Use lime or limestone when scrubbing...

Acid rain forms when

Acid rain forms when a. The temperature is cool and the humidity is high b. The temperature and humidity are high c. Warm fronts meet cold fronts d....

Methane gas is often produced by:

Methane gas is often produced by: a. Insufficient combustion air b. Decomposition of organic matter c. The burning of plastics d. High intensity sunlight...

The most common method of removing sulphur dioxide from flue gases uses:

The most common method of removing sulphur dioxide from flue gases uses: a. Caustic soda b. Limestone c. Filtration d. Sodium carbonate e. A dilute...

A gaseous pollutant that contributes to ozone depletion is:

A gaseous pollutant that contributes to ozone depletion is: a. Nitrous oxide b. Sulphur oxide c. Carbon dioxide d. Carbon monoxide e. Methane Answer:...

Carbon dioxide is responsible for _____ % greenhouse gasses:

Carbon dioxide is responsible for _____ % greenhouse gasses: a. 20 b. 30 c. 40 d. 50 e. 60 Answer:...

Greenhouse gases allow the passage of ____ energy radiation.

Greenhouse gases allow the passage of ____ energy radiation. A. High B. Low C. Potential D. Heat Answer:...

The conversion of Nitrogen oxides occurs at temperatures above

The conversion of Nitrogen oxides occurs at temperatures above A. 1000C B. 1225C C. 1450C D. 1650C Answer:...

Chlorofluorocarbons

Chlorofluorocarbons A. Contribute to the acid rain problem B. Are the main heat trapping gases responsible for the greenhouse effect C. Destroy ozone...

In order for acid rain to be formed

In order for acid rain to be formed A. Atmospheric temperatures must be correct B. Water vapour must be present C. Sunlight must be present D. Water...

A gaseous pollutant that contributes to acid rain is?

A gaseous pollutant that contributes to acid rain is? A. Carbon Dioxide B. Ozone C. CFCs D. Sulphur Dioxide Answer:...

The upper level gas that shields the earth from ultraviolet radiation is?

The upper level gas that shields the earth from ultraviolet radiation is? A. Oxygen B. Ozone C. Carbon Dioxide D. Nitrogen Answer:...

A kilogram of hydrogen delivers about ___ times more energy than a kilogram of carbon.

A kilogram of hydrogen delivers about ___ times more energy than a kilogram of carbon. A. 4.28 B. 4.25 C. 4.26 D. 4.23 E. 4.27 Answer:...

A system that reduces the formation of NOx by limiting turbulence, thus reducing the peak flame temperature at the burner.

A system that reduces the formation of NOx by limiting turbulence, thus reducing the peak flame temperature at the burner. A. Dual Register...

A system that reduces the formation of NOx by recirculation of combustion gases which provides dilution of combustion air.

A system that reduces the formation of NOx by recirculation of combustion gases which provides dilution of combustion air. A. Dual Register Burner B....

A system that reduces the formation of NOx by taking away O2.

A system that reduces the formation of NOx by taking away O2. A. Dual Register Burner B. Low Excess Air Operation C. Two Stage Combustion D. Gas Recirculation Answer:...

A system that reduces the formation of NOx by taking the remaining air for combustion way from the initial combustion zone.

A system that reduces the formation of NOx by taking the remaining air for combustion way from the initial combustion zone. A. Dual Register Burner B....