Railcars

Question 1

What does a DOT-111 tank car transport?

Answer 1

Non-pressurized liquids or solids.

Question 2

What does a DOT-105 tank car transport?

Answer 2

Pressurized gases.

Question 3

What type of tank car carries cryogenic liquids?

Answer 3

Cryogenic tank cars.

Question 4

Are DOT-117 tank cars pressurized or non-pressurized?

Answer 4

Non-pressurized.

Question 5

What material is typically transported in a DOT-112 tank car?

Answer 5

Liquefied compressed gases.

Question 6

Which tank car has thicker walls: DOT-111 or DOT-105?

Answer 6

DOT-105.

Question 7

What is the purpose of a vacuum-insulated cryogenic tank car?

Answer 7

To maintain extremely low temperatures for liquefied gases.

Question 8

Does a pressurized tank car have a bottom outlet valve?

Answer 8

No.

Question 9

What railcar type is used to transport ethanol or crude oil?

Answer 9

DOT-111.

Question 10

What does the ‘A’ in DOT-111A100W1 indicate?

Answer 10

Welded construction.

Question 11

Which railcar type has an outer jacket for thermal protection?

Answer 11

Double-wall tank car.

Question 12

What kind of tank car is commonly used for hazardous flammable liquids?

Answer 12

DOT-117.

Question 13

Are cryogenic tank cars single-wall or double-wall?

Answer 13

Double-wall with vacuum insulation.

Question 14

What does a non-jacketed tank car lack?

Answer 14

Insulation or external protection.

Question 15

Which tank cars transport refrigerated liquefied gases?

Answer 15

Cryogenic tank cars.

Question 16

What does ‘DOT’ stand for on a tank car stencil?

Answer 16

Department of Transportation.

Question 17

What does the marking ‘286K GRL’ mean?

Answer 17

Gross Rail Load of 286,000 pounds.

Question 18

What does ‘LD LMT’ mean?

Answer 18

Load Limit (maximum cargo weight).

Question 19

What does ‘LT WT’ mean?

Answer 19

Light Weight (empty car weight).

Question 20

What does ‘CAPY’ mean?

Answer 20

Capacity (volume of the tank in gallons or liters).

Question 21

What does ‘10/32’ mean on a tank car?

Answer 21

Shell and head thickness in inches or gauge.

Question 22

Where are stencils indicating tank car specifications located?

Answer 22

On both sides of the tank car.

Question 23

What does ‘FRA-2025’ mean?

Answer 23

Last Federal Railroad Administration certification year.

Question 24

What is stenciled on the side of a railcar to indicate its contents?

Answer 24

Commodity name (e.g., ‘LIQUEFIED PETROLEUM GAS’).

Question 25

What information is displayed on hazard placards?

Answer 25

UN number and hazard class.

Question 26

What color placard indicates flammable liquids?

Answer 26

Red.

Question 27

What color placard indicates toxic substances?

Answer 27

White.

Question 28

What hazard class does a yellow placard represent?

Answer 28

Oxidizers (Class 5).

Question 29

What hazard class does a green placard represent?

Answer 29

Non-flammable gases (Class 2).

Question 30

What does 'THERMALLY PROTECTED' mean on a tank car?

Answer 30

The tank car has thermal protection against heat or fire.

Question 31

What is the cylindrical body of a tank car called?

Answer 31

Tank shell.

Question 32

What are the rounded ends of the tank car called?

Answer 32

Heads.

Question 33

What is the purpose of a manway?

Answer 33

Provides access for inspection and maintenance.

Question 34

What does a PRD do?

Answer 34

Prevents overpressurization by venting excess pressure.

Question 35

What are the two types of PRDs?

Answer 35

* Spring-loaded PRVs * Rupture discs

Question 36

Where are loading and unloading valves located on a tank car?

Answer 36

On top of the tank or at the bottom outlet (non-pressurized cars).

Question 37

What is the function of a vapor valve?

Answer 37

Allows for pressure equalization and vapor release.

Question 38

What protects the insulation on a double-wall tank car?

Answer 38

Outer metal jacket.

Question 39

What is the purpose of a head shield?

Answer 39

Prevents punctures during collisions.

Question 40

What prevents railcars from disconnecting during accidents?

Answer 40

Double-shelf couplers.

Question 41

What protects bottom outlet valves?

Answer 41

A metal skid or cage.

Question 42

What kind of valve design minimizes leaks in derailments?

Answer 42

Shear valves.

Question 43

Which part of the railcar helps in fire emergencies?

Answer 43

Thermal protection layers.

Question 44

What is a manway cover used for?

Answer 44

Secures the manway, preventing leaks.

Question 45

Where are safety placards placed on a railcar?

Answer 45

On all four sides of the tank car.

Question 46

Do liquid lines run parallel or perpendicular to the railcar’s length?

Answer 46

Parallel.

Question 47

Do vapor lines run parallel or perpendicular to the railcar’s length?

Answer 47

Perpendicular.

Question 48

Which line has an internal pipe extending to the bottom of the tank?

Answer 48

Liquid line.

Question 49

Which valve connects to a vapor return system?

Answer 49

Vapor valve.

Question 50

Which valve is larger: liquid or vapor?

Answer 50

Liquid valve.

Question 51

What is the main purpose of a vapor valve during unloading?

Answer 51

Pressure equalization.

Question 52

What does a small release from a vapor valve produce?

Answer 52

Mist or gas.

Question 53

What does a small release from a liquid valve produce?

Answer 53

Liquid stream.

Question 54

Which valve feels cooler during operation: liquid or vapor?

Answer 54

Liquid.

Question 55

True or False: Vapor valves are located across the width of the railcar.

Answer 55

True.

Question 56

True or False: Liquid valves are always smaller than vapor valves.

Answer 56

False.

Question 57

What is the key difference between liquid and vapor line placement?

Answer 57

Liquid lines are parallel to the tank’s length; vapor lines are perpendicular.

Question 58

What safety feature connects liquid lines to prevent vacuum formation?

Answer 58

Vapor return system.

Question 59

What is the primary hazard of a leaking liquid valve?

Answer 59

Pooling and runoff.

Question 60

What is the primary hazard of a leaking vapor valve?

Answer 60

Gas dispersion.

Question 61

Where is the handbrake located on a railcar?

Answer 61

On the B-end of the railcar.

Question 62

What marking identifies the side of the railcar with the handbrake?

Answer 62

'B-End.'

Question 63

True or False: The A-end of the railcar has no handbrake.

Answer 63

True.

Question 64

What does 'FRA' stand for?

Answer 64

Federal Railroad Administration.

Question 65

True or False: A jacketed tank car always has visible saddle welds.

Answer 65

False.

Question 66

What kind of tank car has visible saddle welds?

Answer 66

Single-wall tank cars.

Question 67

How do double-wall tank cars protect their contents?

Answer 67

With insulation between the inner tank and outer jacket.

Question 68

What prevents thermal expansion in a pressurized tank car?

Answer 68

Pressure Relief Device (PRD).

Question 69

Where are UN identification numbers displayed?

Answer 69

On hazard placards.

Question 70

What is the primary purpose of a recessed valve cavity?

Answer 70

Protect bottom outlet valves from direct impact.