AY Honors/Model Railroad/Answer Key

3. Know the name, scale, and track gauge for four model railroad gauges.

The six most popular scales used are: G scale, Gauge 1, O scale, H0 scale (in Britain, the similarly sized 00 is used), TT scale, and N scale (1:160), although there is growing interest in Z scale. H0 scale is the single most popular scale of model railroad. Popular narrow-gauge scales include HOn3 Scale and Nn3, which are the same scale as HO and N, except with a narrower spacing between the tracks (in these examples, a scale three feet instead of the 4'8.5" standard gauge).

The words scale and gauge seem at first to be used interchangeably in model railways, but their meanings are different. Scale is the model's measurement as a proportion to the original, while gauge is the measurement between the two running rails of the track.

Name	Scale	Gauge
G scale	1:22.5	45 mm
Gauge 1	1:32	44.45 mm
0 scale	1:43 or 1:48	32 mm
H0 scale	1:87	16.5 mm
TT scale	1:120	12 mm
N scale	1:148 to 1:160	9 mm
Z scale	1:220	6.5 mm

6. Identify and explain the use of:

a. Five types of freight cars

Covered Hopper

[Image:6619.JPG|thumb|200px|Covered hopper]] 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.

Box Car

Box car

A boxcar (the American term; the British call this kind of car a "goods van" while in Australia, they are usually referred to as "louvre vans") is a railroad car that is enclosed and generally used to carry general freight. The boxcar, while not the simplest freight car design, is probably the most versatile, since it can carry most loads. Boxcars have side doors of varying size and operation, and some include end doors and adjustable bulkheads to load very large items.

Container Car

Container cars

Containerization is a system of intermodal freight transport cargo transport using standard ISO containers known as shipping containers that can be loaded and sealed intact onto container ships, railroad cars, planes, and trucks. The introduction of containers resulted in vast improvements in port handling efficiency, thus lowering costs and helping lower freight charges and, in turn, boosting trade flows. Almost every manufactured product humans consume spends some time in a container.

Flat car

Flat car

A flatcar (also flat car) is a piece of railroad rolling stock that consists of an open, flat deck on four or six wheels or a pair of trucks (US) or bogies (UK). The deck of the car can be wood or steel, and the sides of the deck can include pockets for stakes or tie-down points to secure loads. Flatcars designed for carrying machinery have sliding chain assemblies recessed in the deck. Flatcars are used for loads that are too large or cumbersome to load in enclosed cars such as boxcars. They are also often used to transport containers or trailers in intermodal shipping.

Gondola

Gondola car

A gondola is an open-top type of rolling stock that is used for carrying loose bulk materials. Because of its low side walls, gondolas are used to carry either very dense material, such as steel plates or coils, or bulky items such as prefabricated pieces of rail track.

Refrigerator Car

Modern refrigerator car: note the grill at the lower right (the car's "A" end) where the mechanical refrigeration unit is housed.

A refrigerator car (or "reefer") is a refrigerated boxcar, a piece of railroad rolling stock designed to carry perishable freight at specific temperatures. Refrigerator cars differ from simple insulated boxcars and ventilated boxcars (commonly used for transporting fruit), neither of which are fitted with cooling apparatus. Reefers can be ice-cooled, come equipped with any one of a variety of mechanical refrigeration systems, or util

Stock Car

In railroad terminology, a stock car is a type of rolling stock used for carrying livestock (not carcasses) to market. A traditional stock car resembles a boxcar with slats missing in the car's side (and sometimes end) for the purpose of providing ventilation; stock cars can be single-level for large animals such as cattle or horses, or they can have two or three levels for smaller animals such as sheep, pigs, and poultry.

Tank Car

Tank car

A tank car is a type of railroad rolling stock designed to transport liquid and gaseous commodities. Outside of North America, they are also known as tank wagons or tanker wagons.