Union Pacific Hazmat Definitions | Exam Questions with and Answers
with Verified Solutions | Latest 2026 Update
, Q: engine may be controlled by an internal thermostat or remote control via satellite
. Protective
Answer:
Service is indicated on the Train List as PS or " PROTECTIVE SERVICE . "
Rail car equipment used in rail transportation , for example , boxcar , flatcar ,
gondola car ,
hopper car , tank car , or caboose , but not an engine .
Technical name a recognized chemical name used in scientific and technical
handbooks ,
journals , and texts to further identify a hazardous material .
Toxic Inhalation Hazard ( TIH ) - term used to identify certain gases and liquids that
may
cause health problems if inhaled / breathed in very low concentrations for short
periods of time
.
Train one or more engines coupled , with or without rail cars displaying a marker ,
requiring
an appropriate air brake test , and authorized to operate on a main track . Note : This
also
includes movements on an industrial lead .
Yard system of tracks , other than main tracks and sidings , used for making and
breaking up
trains and for other purposes , such as repair or storage of cars .
N.O.S. initials , found on shipping papers , which mean " Not Otherwise Specified . "
with Verified Solutions | Latest 2026 Update
, Q: engine may be controlled by an internal thermostat or remote control via satellite
. Protective
Answer:
Service is indicated on the Train List as PS or " PROTECTIVE SERVICE . "
Rail car equipment used in rail transportation , for example , boxcar , flatcar ,
gondola car ,
hopper car , tank car , or caboose , but not an engine .
Technical name a recognized chemical name used in scientific and technical
handbooks ,
journals , and texts to further identify a hazardous material .
Toxic Inhalation Hazard ( TIH ) - term used to identify certain gases and liquids that
may
cause health problems if inhaled / breathed in very low concentrations for short
periods of time
.
Train one or more engines coupled , with or without rail cars displaying a marker ,
requiring
an appropriate air brake test , and authorized to operate on a main track . Note : This
also
includes movements on an industrial lead .
Yard system of tracks , other than main tracks and sidings , used for making and
breaking up
trains and for other purposes , such as repair or storage of cars .
N.O.S. initials , found on shipping papers , which mean " Not Otherwise Specified . "
