CHAPTER - 2	FEATURES AND WORKING PRINCIPLES
2.1	Types of machines
2.1.1	Tamping of machines
2.1.2	Dynamic track stablizer (DTS)
2.1.3	Ballast handling machines
2.1.4	Track laying machines
2.1.5	Special purpose machines
2.2	Tamping machines
2.2.1	General
2.2.2	Alignment of track
2.2.2.1	Two chord lining system
(i)	Smoothing mode
(ii)	Precision/design mode
2.2.2.2	Single chord lining system
(i)	4-point Lining method
(ii)	3-point lining method
2.2.3	Levelling of track
(i)	Levelling in automatic mode (Smoothing Mode)
(ii)	Levelling in design mode
2.2.4	Optional quipments
(i)	Radio Control system
(ii)	Laser beam system
(iii)	Geometry value Assessment (GVA)
(iv)	TPacking/Tamping Systems
2.2.5	Important Assemblies of Tamping Machines
(i)	Engine
(ii)	Tamping units
2.3	Dynamic Track Stabiliser (DTS)
2.3.1	General
2.3.2	Working Principles
2.3.3	General Data
2.4	Ballast Handling Machines
2.4.1	General
2.4.2	Plain track BCM (RM-80)
2.4.3	Points & Crossing BCM (RM -76)
2.4.4	Shoulder Ballast Cleaning Machine
2.4.5	Ballast Regulating Machines (BRM)
2.5	Track Relaying Machines.
2.5.1	Plasser's Quick Relaying System(PQRS)
2.5.2	Track Relying Train (TRT)
2.5.3	Points and Crossing Relaying Machine (T-28)
2.6	Special Purpose Machines
2.6.1	Mobile Flash Butt Welding Plant K-355 APT
2.6.2	Rail Grinding Machine

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