Which term refers to a unit or combination of units propelled by any form of energy and operated from a single control, used in train or yard service?

Which term refers to a unit or combination of units propelled by any form of energy and operated from a single control, used in train or yard service?

• A. Engine
• B. Fixed Signal
• C. Fouling Time
• D. Form D Control System (DCS)

Answer: (C)

The term described is engine. It refers to a unit or group of powered units (any energy source) that are operated from a single control, and is used in both train and yard service. This covers a single locomotive or a consist of multiple locomotives under one throttle or control. The other options aren’t propulsion units: a fixed signal is a stationary signal, fouling time is the period a track section is occupied, and Form D Control System is a signaling/control system, not a propulsion unit.

The term described is engine. It refers to a unit or group of powered units (any energy source) that are operated from a single control, and is used in both train and yard service. This covers a single locomotive or a consist of multiple locomotives under one throttle or control. The other options aren’t propulsion units: a fixed signal is a stationary signal, fouling time is the period a track section is occupied, and Form D Control System is a signaling/control system, not a propulsion unit.