Heat recovery started to be added to the refuse incinerators, as did strict air pollution guidelines. The basic incinerators with waste heat recovery have evolved into _________ boilers with integral stokers.

Heat recovery started to be added to the refuse incinerators, as did strict air pollution guidelines. The basic incinerators with waste heat recovery...

Combustion can take place at temperatures ranging from ____°C to ____°C instead of normal combustion temperatures of 1600°C to 1900°C for pulverized coal and oil firing.

Combustion can take place at temperatures ranging from ____°C to ____°C instead of normal combustion temperatures of 1600°C to 1900°C for pulverized...

Inconel is an alloy composed of _______ and chromium.

Inconel is an alloy composed of _______ and chromium. A ) lead B ) copper C ) steel D ) nickel Answer:...

Crushed coal from 1.6 mm to 6 mm is injected into the bed by means of an ________.

Crushed coal from 1.6 mm to 6 mm is injected into the bed by means of an ________. A ) elevator B ) air-stream C ) injector D ) pulverizer Answer:...

Systems to burn wood and biomass usually involve a separate ________, called a dutch oven, or a traveling grate or vibrating grate arrangement.

Systems to burn wood and biomass usually involve a separate ________, called a dutch oven, or a traveling grate or vibrating grate arrangement. A...

Because of the low operating temperatures, an inexpensive material such as CaCO3 (lime) can be added to the bed. It acts as a sorbent to remove ______ from the flue gases.

Because of the low operating temperatures, an inexpensive material such as CaCO3 (lime) can be added to the bed. It acts as a sorbent to remove ______...

Bubbling Fluid Bed Boilers (BFB) are subject to _____ erosion rates.

Bubbling Fluid Bed Boilers (BFB) are subject to _____ erosion rates. A ) low B ) moderate C ) extreme D ) high Answer:...

The pinhole grates have __________ air holes to admit air to the burning material on the grate.

The pinhole grates have __________ air holes to admit air to the burning material on the grate. A ) venture-type B ) square C ) round D ) large Answer:...

A simple combined cycle power generation system can consist of:

A simple combined cycle power generation system can consist of: A ) a single gas turbine generator B ) a HRSG (heat recovery steam generator) C )...

A particular application of the once-through boiler design is the steam-flooding boiler. This is a boiler used for flooding oil wells with steam in order to increase the oil recovery.

A particular application of the once-through boiler design is the steam-flooding boiler. This is a boiler used for flooding oil wells with steam in...

List the five functions of the auxiliary fuel burners:

List the five functions of the auxiliary fuel burners: 1 Raise steam during startup 2 Sustain a stable ignition while establishing a char bed 3 Stabilize...

There is also corrosion caused by _________ in refuse-fired boilers.

There is also corrosion caused by _________ in refuse-fired boilers. A ) chlorides B ) fuels C ) materials D ) burning Answer:...

The liquor droplets must be ______ enough to minimize entrainment in the combustion gases.

The liquor droplets must be ______ enough to minimize entrainment in the combustion gases. A ) small B ) large C ) dispersed D ) fine Answer:...

The primary function of the recovery boiler is to process ______ liquor.

The primary function of the recovery boiler is to process ______ liquor. A ) white B ) green C ) black D ) liquor Answer:...

Fluidized bed boilers have the ability to burn ________ fuels in an environmentally acceptable manner.

Fluidized bed boilers have the ability to burn ________ fuels in an environmentally acceptable manner. A ) low grade B ) high grade C ) liquid D )...

Outputs from Steam Flooding Boilers range from ___ million kJ/h to ___ million kJ/h in standard sizes.

Outputs from Steam Flooding Boilers range from ___ million kJ/h to ___ million kJ/h in standard sizes. A ) 1 , 100 B ) 5 , 50 C ) 100 , 200 D ) 1...

If the black liquor is too ______, it too can result in an explosion.

If the black liquor is too ______, it too can result in an explosion. A ) strong B ) thin C ) weak D ) thick Answer: ...

The reason for the use of steam is to allow the maximum quantity of heat to be put into the well with the ________ quantity of injected fluid.

The reason for the use of steam is to allow the maximum quantity of heat to be put into the well with the ________ quantity of injected fluid. A )...

The main application for ______ boilers is steam generation using gas turbine exhaust gas as a heat source.

The main application for ______ boilers is steam generation using gas turbine exhaust gas as a heat source. A ) fluidized bed B ) HRSG C ) Once through D...

One method of burning _____ is called fluidized bed combustion.

One method of burning _____ is called fluidized bed combustion. A ) liquids B ) wood C ) methane D ) coal Answer:...

These types of boilers (A, D, and O) have furnaces cooled by _________ lining the furnace walls.

These types of boilers (A, D, and O) have furnaces cooled by _________ lining the furnace walls. A ) water tubes B ) fans C ) desuperheaters D ) air...

Where the boiler provides the entire steam supply to an electric generating unit, the output of the boiler is expressed in terms of power output of the generator (for example a 300 megawatt boiler).

Where the boiler provides the entire steam supply to an electric generating unit, the output of the boiler is expressed in terms of power output of...

The purpose of the downcomer is to supply:

The purpose of the downcomer is to supply: A ) Hot water to the steam drum B ) Cool water to the steam drum C ) Cool water from steam drum to rest...

Natural circulation in a boiler depends upon the ___________ in the density of a column of water and the density of a column containing a steam/water mixture.

Natural circulation in a boiler depends upon the ___________ in the density of a column of water and the density of a column containing a steam/water...

There are several factors that influence the natural circulation in a watertube boiler. These are:

There are several factors that influence the natural circulation in a watertube boiler. These are: A ) The height of the steam drum above the bottom...

The main advantage of the packaged boiler is its _____ _____.

The main advantage of the packaged boiler is its _____ _____. A ) small size B ) compact design C ) low cost D ) quality steam Answer:...

The difference in density between water and saturated steam becomes progressively less with increased pressure and disappears altogether at the critical pressure _______ .

The difference in density between water and saturated steam becomes progressively less with increased pressure and disappears altogether at the critical...

Feed-water entering the boiler section first passes through the __________ section where it is heated by the combustion gases leaving the boiler.

Feed-water entering the boiler section first passes through the __________ section where it is heated by the combustion gases leaving the boiler. A...

Field erected boilers have outputs of?

Field erected boilers have outputs of? A ) 75000 kg/h B ) 100000 kg/h C ) 100 mg/h D ) 150000 kg/h or more Answer:...

The disadvantages of forced circulation in a boiler are the ______ _____ of equipment, pumps, piping, etc.

The disadvantages of forced circulation in a boiler are the ______ _____ of equipment, pumps, piping, etc. A ) greater use B ) increased costs C...

One square metre of heating surface equals 10 kilowatts. The heating surface of a boiler must be determined by computing the area of the surface involved in square metres and where a computation is to be made of a curved surface; the surface having the greater radius shall be taken.

One square metre of heating surface equals 10 kilowatts. The heating surface of a boiler must be determined by computing the area of the surface involved...

The advantage of forced circulation in a boiler is a _________ flow in all tubes.

The advantage of forced circulation in a boiler is a _________ flow in all tubes. A ) negative B ) greater C ) positive D ) mass Answer:...

The arrangement of a once through boiler has no drums. The feed water is heated and then evaporated and superheated in ______ ______ through the unit.

The arrangement of a once through boiler has no drums. The feed water is heated and then evaporated and superheated in ______ ______ through the unit. A...

Generally two types of draft fans are used. A _____ ____ fan supplies air to the air preheater. The preheated air (350°C) for combustion goes to the coal pulverizers and to the burners. An ______ ____ fan exhausts the combustion gases (170°C) from the air heater to the stack.

Generally two types of draft fans are used. A _____ ____ fan supplies air to the air preheater. The preheated air (350°C) for combustion goes to the...

Steam generators operating above critical pressure are said to be ______-critical and steam generators operating below critical pressure are classed as ____-critical.

Steam generators operating above critical pressure are said to be ______-critical and steam generators operating below critical pressure are classed...

Combustion air for the burners is preheated to ______350°C in the air heater section by combustion gases leaving the economizer section.

Combustion air for the burners is preheated to ______350°C in the air heater section by combustion gases leaving the economizer section. A ) 150 °C B...

Packaged watertube boilers capacities range from?

Packaged watertube boilers capacities range from? A ) 2300 kg to 65000 kg per hour B ) 500 kg to 100 mg per hour C ) 15 psi to 15000 kg per hour D...

The downcomers are located in the ______ regions of the boiler, or external to the furnace altogether. The risers are located in the ________ zones of the boiler, being exposed to radiant heat of the furnace or to the very hot flue gases near the furnace.

The downcomers are located in the ______ regions of the boiler, or external to the furnace altogether. The risers are located in the ________ zones...

The downcomers are located in the ______ regions of the boiler, or external to the furnace altogether. The risers are located in the ________ zones of the boiler, being exposed to radiant heat of the furnace or to the very hot flue gases near the furnace.

The downcomers are located in the ______ regions of the boiler, or external to the furnace altogether. The risers are located in the ________ zones...

Where electric power is used as the heating source, the boiler rating shall be the maximum kilowatt rating of the ______ ______.

Where electric power is used as the heating source, the boiler rating shall be the maximum kilowatt rating of the ______ ______. A ) Power Plant B...

The steam separating equipment separates the _______ from the steam/water mixture.

The steam separating equipment separates the _______ from the steam/water mixture. A ) water B ) steam C ) impurities D ) water droplets Answer:...

A steam generating unit consists of a number of elements all of which contribute to the production of steam.The elements of a typical steam generator include:

A steam generating unit consists of a number of elements all of which contribute to the production of steam.The elements of a typical steam generator...