Difference between revisions of "AY Honors/Model Railroad/Answer Key"

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{{honor_header|2|1967|Arts and Crafts|General Conference}}
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[[Image:UTLX 204455 20050529 IL Rochelle.jpg|thumb|300px|A modern tank car, owned by the [[Union Tank Car Company]], passes westbound through [[Rochelle Railroad Park]], [[Rochelle, Illinois]] on [[May 29]], [[2005]].]]
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[[Image:Tank car UTLX 12283.jpg|thumb|300px|A tank car on display at the [[Mid-Continent Railway Museum]] in [[North Freedom, Wisconsin]].]]
 +
A '''tank car''' is a piece of [[railroad]] [[rolling stock]] designed to carry [[Bulk liquids|liquefied loads]], [[petroleum]] products, liquid [[chemicals]] and [[gas]]ses. Many variants exist due to the wide variety of [[liquid]]s and gases that can be transported. Tank cars can be [[Thermal insulation|insulated]] or non-insulated, [[pressurized]] or non-pressurized, and designed for single or multiple loads. Non-pressurized cars have plumbing at the bottom for unloading, and may have an access port and a dome, housing various valving on the top. Pressurized cars have a pressure plate, with all valving, and a protective cylindrical housing (dome) at the top. Loading and unloading are done through this opening.
  
==1. Give the history and development of model railroading. ==
+
Within the rail industry, tank cars are grouped by their interior linings and not by the cargo carried. Food service tank cars are lined with [[stainless steel]], glass or cleanable plastic and they are marked as non-pressurized, insulated cars. Usually these are small and carry around 10,000 gallons. Petroleum carrying tank cars are lined with alloy steel, rubber or carbon steel. They are insulated, usually non-pressurized cars (however, very light petrochemicals or jet fuel cars will be pressurized with nitrogen to prevent evaporation to avoid an explosion hazard). These cars are larger, around 23,000 gallons. the ends will be doubled to prevent ruptures during accidents. As of 2007, the multicargo type mentioned above is obsolete. Natural gas, LPG or ammonia carrying cars are basically 60,000 gallon alloy steel pressure vessels on steel wheels. They have no linings, and are double ended. The whale belly type is giving way to higher but standard width cars.
==2. Tell the difference in how the following prototype motive power units operate:==
 
===a. Steam ===
 
===b. Diesel ===
 
===c. Electric===
 
==3. Know the name, scale, and track gauge for four model railroad gauges.==
 
==4. Know the shapes and names of at least eight track plan arrangements.==
 
==5. Know at least six points to check for the maintenance of a model railroading layout. ==
 
==6. Identify and explain the use of: ==
 
===a. Five types of freight cars ===
 
  
 +
All tank cars are inspected every couple of years for damage, corrosion, etc. Relief valves and mounts are inspected at every loading. Pressurized cars are pressure tested regularly to insure they are solid. All tank cars operating in North America now feature "double shelf" couplers that will not uncouple in an accident, so the coupler will not puncture other tank cars.
  
==== Covered Hopper ====
+
Insulated cars (which may also incorporate heating or refrigeration systems) are used when the contents must be kept at a certain temperature. For example, the Linde tank car depicted below carries liquefied [[argon]]. Cars designed for multiple loads have internal bulkheads to separate the contents. Each compartment must have separate plumbing and its own dome if so equipped. The added complexity of multiple-load cars means that they make up a small percentage of the tank car population. If two loads must be transported, it is often simpler to use two tank cars instead of a two-load car.
Structurally, a covered hopper is very similar to an open­top hopper car. What distinguishes this type of car from an open hopper is the car's roof, and also the car's overall size. Covered hoppers typically carry loads of less dense, and therefore lighter, materials, so they are built to a higher cubic capacity than open top hoppers.  
 
  
More Info:
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In the [[United Kingdom]], [[Ireland]], and [[New Zealand]], tank cars are generally called '''tank wagons''' or '''tanker wagons'''.
* http://www.uprr.com/customers/equip-resources/cartypes/covered.shtml
 
* Wikipedia article on [[w:Covered hopper|Covered hopper]]
 
  
==== Box Cars ====
+
==History==
 +
<gallery>
 +
Image:RR-1331.jpg|The narrow domes on these [[East Tennessee and Western North Carolina Railroad]] tank cars mirror the designs of the first all-steel units.
 +
Image:OP-16236.jpg|Texaco, Inc. (TCX) #723, a single-dome tank car designed for transporting [[gasoline]], passes through [[Amarillo, Texas]] on [[April 4]], [[1936]].
 +
Image:OP-16233.jpg|This double-dome tank car has two separate interior tanks, which allow different products to be transported in the same car.
 +
Image:OP-19582.jpg|This unusual three-dome tank car has an oversized center dome.
 +
</gallery>
  
More Info:
+
Tank cars have always been specialized pieces of equipment. The interior of the car is usually lined with a material to isolate the car's structure from the contents, such as [[glass]]. Loading a liquid into a car that is designed to carry something else is unwise and sometimes dangerous. Even after a thorough cleaning, traces of the previous contents may remain. Loading a [[pesticide]]-carrying tank car with [[cooking oil]] is one example. The cooking oil will at best be unpalatable and at worst become toxic.  
* http://www.uprr.com/customers/equip-resources/cartypes/boxcars.shtml
 
  
===b. Three types of passenger cars ===
+
As a result of this specialization, tank cars have always been "one-way" cars. Other cars, like [[boxcar]]s can easily be reloaded with other goods for the return trip. Combinations of the two types were attempted, such as boxcars with fluid tanks slung beneath the floors. While the car could certainly carry a load both directions, the limited size of the tanks made this style unsuccessful.
===c. Three types of steam engines according to their wheel arrangement ===
 
===d. Two types of grade crossing warning devices ===
 
===e. Two types of railroad signals ===
 
===f. Five types of railroad-related buildings or structures ===
 
  
==7. Know the meaning of the following model railroad terms:==
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Because of their one-way nature, tank cars are simply dead weight half of the time, making them unappealing to major railroads. A large percentage of tank cars are owned by companies serviced by railroads instead of the railroads themselves. This can be verified by examining the [[reporting mark]]s on the cars. These marks invariably end in ''X,'' meaning that the owner is not a [[common carrier]].
===a. Ballast=== 
 
===b. Blind drivers===
 
===c. Block ===
 
===d. Bolster ===
 
===e. Crossing === 
 
===f. Crossover ===
 
===g. Double header ===
 
===h. Draft gear ===
 
===i. Flange ===
 
===j. Frog ===
 
===k. Gap ===
 
===l. Gauge ===
 
===m. Grade === 
 
===n. Gravity yard === 
 
===o. Hot box ===
 
===p. Insulated rail joiner === 
 
===q. Journal===
 
=== r. Layout===
 
=== s. Mainline ===
 
===t. Prototype ===
 
===u. Rail joiner ===
 
===v. Reverse loop===
 
===w. Siding ===
 
===x. Spur ===
 
===y. Switch ===
 
===z. Machine ===
 
===aa. Talgo truck ===
 
===bb. Truck ===
 
===cc. Turnout ===
 
===dd. Two-rail===
 
===ee. Wye===
 
===ff. Yswitch ===
 
===gg. Yard===
 
==8. Construct a portion of a model railroad layout. In your construction, do the following: ==
 
===a. Assist in assembling the framework ===
 
===b. Install a section of ballast ===
 
===c. Install a section of track ===
 
===d. Install at least one turnout, including the wiring ===
 
===e. Assist in making scenery, such as trees, rocks, mountains, or grass ===
 
===f. Make one model railroading building or structure ===
 
===g. Assist in the wiring to supply electrical power to the tracks ===
 
==9. Successfully operate a model railroad train on the layout you have assisted in building. ==
 
  
[[Category:Adventist Youth Honors Answer Book|{{SUBPAGENAME}}]]
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To understand tank car history we need to go to the first tank built, which was in Pennsylvania to move petroleum. It consisted of three open vats bolted to a flat car.  The problem came as tank car design and liquid cargo types expanded. Investing in new cars all the time made tank cars unappealing to railways, so a new company was founded: [[Union Tank Car Company]]. this company was charged with building, maintaining and running, on behalf of the railways, the tank car fleet.
 +
 
 +
==Timeline==
 +
[[Image:OP-3471.jpg|thumb|Chicago and Northwestern Railway tank car #6093 sits on a siding in [[Lusk, Wyoming]] on [[August 1]], [[1947]].]]
 +
[[Image:Carro cisterno de Ferrovie Eritrea.jpg|thumb|A ''carro cisterno'' (tank car) of the [[Eritrean Railway]] (''Ferrovia Eritrea'', or ''FE''), date unknown. The 2-axle car is 7,000 [[millimeter|mm]] (23 [[foot (unit of length)|feet]]) long, and has a 6,650 [[kilogram|kg]] (14,660 [[pound (mass)|lb]]) load capacity.]]
 +
* [[1865]]: Flats with banded wooden tanks mounted on top are employed for the first time to transport crude oil from the fields of [[Pennsylvania]].
 +
* [[1869]]: Cast iron tanks (with an approximate capacity of 3,500 gallons / 13,200&nbsp;l per car) replace wooden tanks.
 +
* [[1888]]: Tank car manufacturers sell units directly to the oil companies, with capacities ranging from 6,000 gallons to 10,000 gallons (22,700&nbsp;l to 37,800&nbsp;l).
 +
* [[1903]]: Tank car companies develop construction safety standards; more than 10,000 tank cars are in operation.
 +
* [[1915]]: A classification system is developed by the tank car industry to ensure the correct match of product being shipped to car type. Some 50,000 tank cars are in use.
 +
* [[1920]]: Welding technology replaces riveting in tank car construction, enhancing the safety of cars. 
 +
* [[1930]]: 140,000 tank cars transport some 103 commodities (in addition to oil) to market.
 +
* [[1940s]]: Virtually every tank car is engaged in oil transport in support of the [[World War II|war effort]].
 +
* [[1950]]: Pipelines and tanker trucks begin to compete for liquid transport business.
 +
* [[1963]]: The Union Tank Car Company (UTLX) introduces the "Whale Belly" tank car.
 +
<br style="clear:both;">
 +
==Specialized applications==
 +
{{Cleanup|date=April 2007}}
 +
===Gas transport===
 +
[[Image:OP-20296.jpg|thumb|left|Tank cars such as [[Canadian National Railway]] #51860, shown passing through [[Quebec|Québec]] in August, [[1937]] were designed to transport [[industrial gas]]es under high pressure.]]
 +
[[Image:Linde-raix708a.jpg|thumb|right|This [[Linde AG|Linde]] tank car transports refrigerated liquefied gases and is insulated in order to prevent the contents from evaporating during transport.]]
 +
<br style="clear:both;">
 +
 
 +
===Milk cars===
 +
[[Image:BFIX 520 20050716 Illinois Railway Museum.JPG|thumb|Borden (BFIX) #520, a restored milk car on display at the [[Illinois Railway Museum]].]]
 +
A milk car is a specialized type of tank car designed to carry raw [[milk]] between farms or regional creameries and processing plants. Not all milk cars were tank cars. Today, milk would be chilled before loading, and moved in a glass lined, food service tank car.
 +
<br style="clear:both;">
 +
 
 +
===Pickle cars===
 +
A pickle car is a specialized type of tank car designed to carry [[Pickled cucumber|pickle]]s. This car has four visible wooden tanks and is roofed. Pickles which are preserved in salt brine are loaded through hatches in the roof. Obsolete in 2007
 +
 
 +
===Tanktainers===<!-- This section is linked from [[Containerization]] -->
 +
[[Image:Railroad car with container loads.jpg|thumb|A [[Union Pacific Railroad]] tank container and another [[containerization|container]] aboard a [[flatcar]].]]
 +
A tanktainer, also known as a tank container, is a specialized type of [[containerization|container]] designed to carry [[bulk liquids]] or [[dangerous goods]] on standard [[intermodal freight transport|intermodal]] equipment. The tank is held within a box-shaped frame the same size and shape as a container.
 +
<br clear=all>
 +
 
 +
===Vinegar cars===
 +
[[Image:OP-16131.jpg|thumb|Two double wooden-tank vinegar cars owned by the Speas Co. wait for their next assignment in [[Denver, Colorado]] ''circa'' [[1965]].]]
 +
A vinegar car is a specialized type of tank car designed to transport [[vinegar]].  The largest such car built was built by [[Morrison Railway Supply Corporation]] in 1968.  The car's underframe included all of the modern conveniences of freight car design including roller bearing [[bogie|trucks]] and cushioning devices built by FreightMaster, while the tank that rode on it, made of Douglas fir, could hold 17,100 gallons (64,730 liters).  The car, called the largest wooden tank car ever built, took 18 months to complete construction. Obsolete in 2007- vinegar now moved in ordinary tank cars lined with glass, plastic, or alloy steel.<ref>{{cite journal| journal=Railway Age| month=[[October 28]]| year=[[1968]]| title=Week at a glance: Vinegar by rail - in giant wooden tanks| pages=p 11| volume=165| issue=17| }}</ref>
 +
<br style="clear:both;">
 +
 
 +
==="Whale Belly" cars===
 +
[[Image:GATX96500.jpg|thumb|GATX 96500, the largest railroad tank car ever built at 63,000 gallons capacity.]]
 +
In the early [[1960s]], the [[Union Tank Car Company]] (UTLX) introduced a series of "whale belly" tank cars which offered increased capacity over the standard cars of the day. Capable of carrying 33,000 gallons (125,000&nbsp;l) (for example [http://www.northeast.railfan.net/images/csox31084.jpg CSOX #31084]) to as much as 63,000 gallons (238,500&nbsp;l) in the case of [[General American Transportation Corporation|GATX]] #96500, which had been conceived as a 'rolling experiment' of sorts. The largest tank car ever placed into regular service, [http://www.northeast.railfan.net/images/utlx83699.jpg UTLX #83699], was rated at 50,000 (189,200&nbsp;l) gallons, and is now on display at the [[Galveston Railroad Museum]] -- first hit the rails in 1963 and remained in service for over twenty years. This behemoth is 89 feet (27&nbsp;m) in length and weighs 175,000 lb. (79,400&nbsp;kg) empty; the car, which rides on four two-axle trucks to distribute the additional weight, was used to transport such diverse substances as [[liquefied petroleum gas]] (LPG) and [[anhydrous]] [[ammonia]].
 +
<br style="clear:both;">
 +
 
 +
==References==
 +
* {{cite web| title=History Of The Rail Tank Car| author=Herron, J.|date=April 2002| work=e-Train, the online magazine of the Train Collectors Association| url=http://tcaetrain.org/articles/tickets/tankcar/index.html| accessdate=April 20| accessyear=2007}}
 +
* {{cite book| author=White, Jr., John H.| year=1993| title=The American Railroad Freight Car| publisher=The Johns Hopkins University Press, Baltimore, Maryland| id=ISBN 0-8018-5236-6}}
 +
<references />
 +
 
 +
== External links ==
 +
{{Commons|Category:Tank cars|Tank cars}}
 +
* [http://rwhales.railstuff.net/ Rail Whales]
 +
* [http://tankcarhomepage.railfan.net/ Modern Tank Car Homepage]
 +
* [http://www.utlx.com/dictionary/dict.asp Tank car dictionary]
 +
* [http://www.robertjohndavis.com/milktrains/ Milk Trains blog for information specific to milk tank cars.]
 +
 
 +
{{Freight cars}}
 +
[[Category:Freight equipment]]
 +
 
 +
[[de:Kesselwagen]]
 +
[[eo:Cisterna vagono]]
 +
[[fr:Wagon-citerne]]
 +
[[ja:タンク車]]

Revision as of 12:58, 8 October 2007

A modern tank car, owned by the Union Tank Car Company, passes westbound through Rochelle Railroad Park, Rochelle, Illinois on May 29, 2005.

A tank car is a piece of railroad rolling stock designed to carry liquefied loads, petroleum products, liquid chemicals and gasses. Many variants exist due to the wide variety of liquids and gases that can be transported. Tank cars can be insulated or non-insulated, pressurized or non-pressurized, and designed for single or multiple loads. Non-pressurized cars have plumbing at the bottom for unloading, and may have an access port and a dome, housing various valving on the top. Pressurized cars have a pressure plate, with all valving, and a protective cylindrical housing (dome) at the top. Loading and unloading are done through this opening.

Within the rail industry, tank cars are grouped by their interior linings and not by the cargo carried. Food service tank cars are lined with stainless steel, glass or cleanable plastic and they are marked as non-pressurized, insulated cars. Usually these are small and carry around 10,000 gallons. Petroleum carrying tank cars are lined with alloy steel, rubber or carbon steel. They are insulated, usually non-pressurized cars (however, very light petrochemicals or jet fuel cars will be pressurized with nitrogen to prevent evaporation to avoid an explosion hazard). These cars are larger, around 23,000 gallons. the ends will be doubled to prevent ruptures during accidents. As of 2007, the multicargo type mentioned above is obsolete. Natural gas, LPG or ammonia carrying cars are basically 60,000 gallon alloy steel pressure vessels on steel wheels. They have no linings, and are double ended. The whale belly type is giving way to higher but standard width cars.

All tank cars are inspected every couple of years for damage, corrosion, etc. Relief valves and mounts are inspected at every loading. Pressurized cars are pressure tested regularly to insure they are solid. All tank cars operating in North America now feature "double shelf" couplers that will not uncouple in an accident, so the coupler will not puncture other tank cars.

Insulated cars (which may also incorporate heating or refrigeration systems) are used when the contents must be kept at a certain temperature. For example, the Linde tank car depicted below carries liquefied argon. Cars designed for multiple loads have internal bulkheads to separate the contents. Each compartment must have separate plumbing and its own dome if so equipped. The added complexity of multiple-load cars means that they make up a small percentage of the tank car population. If two loads must be transported, it is often simpler to use two tank cars instead of a two-load car.

In the United Kingdom, Ireland, and New Zealand, tank cars are generally called tank wagons or tanker wagons.

History

Tank cars have always been specialized pieces of equipment. The interior of the car is usually lined with a material to isolate the car's structure from the contents, such as glass. Loading a liquid into a car that is designed to carry something else is unwise and sometimes dangerous. Even after a thorough cleaning, traces of the previous contents may remain. Loading a pesticide-carrying tank car with cooking oil is one example. The cooking oil will at best be unpalatable and at worst become toxic.

As a result of this specialization, tank cars have always been "one-way" cars. Other cars, like boxcars can easily be reloaded with other goods for the return trip. Combinations of the two types were attempted, such as boxcars with fluid tanks slung beneath the floors. While the car could certainly carry a load both directions, the limited size of the tanks made this style unsuccessful.

Because of their one-way nature, tank cars are simply dead weight half of the time, making them unappealing to major railroads. A large percentage of tank cars are owned by companies serviced by railroads instead of the railroads themselves. This can be verified by examining the reporting marks on the cars. These marks invariably end in X, meaning that the owner is not a common carrier.

To understand tank car history we need to go to the first tank built, which was in Pennsylvania to move petroleum. It consisted of three open vats bolted to a flat car. The problem came as tank car design and liquid cargo types expanded. Investing in new cars all the time made tank cars unappealing to railways, so a new company was founded: Union Tank Car Company. this company was charged with building, maintaining and running, on behalf of the railways, the tank car fleet.

Timeline

File:OP-3471.jpg
Chicago and Northwestern Railway tank car #6093 sits on a siding in Lusk, Wyoming on August 1, 1947.
File:Carro cisterno de Ferrovie Eritrea.jpg
A carro cisterno (tank car) of the Eritrean Railway (Ferrovia Eritrea, or FE), date unknown. The 2-axle car is 7,000 mm (23 feet) long, and has a 6,650 kg (14,660 lb) load capacity.
  • 1865: Flats with banded wooden tanks mounted on top are employed for the first time to transport crude oil from the fields of Pennsylvania.
  • 1869: Cast iron tanks (with an approximate capacity of 3,500 gallons / 13,200 l per car) replace wooden tanks.
  • 1888: Tank car manufacturers sell units directly to the oil companies, with capacities ranging from 6,000 gallons to 10,000 gallons (22,700 l to 37,800 l).
  • 1903: Tank car companies develop construction safety standards; more than 10,000 tank cars are in operation.
  • 1915: A classification system is developed by the tank car industry to ensure the correct match of product being shipped to car type. Some 50,000 tank cars are in use.
  • 1920: Welding technology replaces riveting in tank car construction, enhancing the safety of cars.
  • 1930: 140,000 tank cars transport some 103 commodities (in addition to oil) to market.
  • 1940s: Virtually every tank car is engaged in oil transport in support of the war effort.
  • 1950: Pipelines and tanker trucks begin to compete for liquid transport business.
  • 1963: The Union Tank Car Company (UTLX) introduces the "Whale Belly" tank car.


Specialized applications

Template:Cleanup

Gas transport

File:OP-20296.jpg
Tank cars such as Canadian National Railway #51860, shown passing through Québec in August, 1937 were designed to transport industrial gases under high pressure.
File:Linde-raix708a.jpg
This Linde tank car transports refrigerated liquefied gases and is insulated in order to prevent the contents from evaporating during transport.


Milk cars

Borden (BFIX) #520, a restored milk car on display at the Illinois Railway Museum.

A milk car is a specialized type of tank car designed to carry raw milk between farms or regional creameries and processing plants. Not all milk cars were tank cars. Today, milk would be chilled before loading, and moved in a glass lined, food service tank car.

Pickle cars

A pickle car is a specialized type of tank car designed to carry pickles. This car has four visible wooden tanks and is roofed. Pickles which are preserved in salt brine are loaded through hatches in the roof. Obsolete in 2007

Tanktainers

A Union Pacific Railroad tank container and another container aboard a flatcar.

A tanktainer, also known as a tank container, is a specialized type of container designed to carry bulk liquids or dangerous goods on standard intermodal equipment. The tank is held within a box-shaped frame the same size and shape as a container.

Vinegar cars

File:OP-16131.jpg
Two double wooden-tank vinegar cars owned by the Speas Co. wait for their next assignment in Denver, Colorado circa 1965.

A vinegar car is a specialized type of tank car designed to transport vinegar. The largest such car built was built by Morrison Railway Supply Corporation in 1968. The car's underframe included all of the modern conveniences of freight car design including roller bearing trucks and cushioning devices built by FreightMaster, while the tank that rode on it, made of Douglas fir, could hold 17,100 gallons (64,730 liters). The car, called the largest wooden tank car ever built, took 18 months to complete construction. Obsolete in 2007- vinegar now moved in ordinary tank cars lined with glass, plastic, or alloy steel.&

"Whale Belly" cars

File:GATX96500.jpg
GATX 96500, the largest railroad tank car ever built at 63,000 gallons capacity.

In the early 1960s, the Union Tank Car Company (UTLX) introduced a series of "whale belly" tank cars which offered increased capacity over the standard cars of the day. Capable of carrying 33,000 gallons (125,000 l) (for example CSOX #31084) to as much as 63,000 gallons (238,500 l) in the case of GATX #96500, which had been conceived as a 'rolling experiment' of sorts. The largest tank car ever placed into regular service, UTLX #83699, was rated at 50,000 (189,200 l) gallons, and is now on display at the Galveston Railroad Museum -- first hit the rails in 1963 and remained in service for over twenty years. This behemoth is 89 feet (27 m) in length and weighs 175,000 lb. (79,400 kg) empty; the car, which rides on four two-axle trucks to distribute the additional weight, was used to transport such diverse substances as liquefied petroleum gas (LPG) and anhydrous ammonia.

References

External links

Template:Commons

Template:Freight cars

de:Kesselwagen eo:Cisterna vagono fr:Wagon-citerne ja:タンク車