AMT 2 Exam Questions & Answers | 100% Correct Answers | Verified | Latest 2024 Version

AMT 2 Exam Questions & Answers | 100% Correct Answers | Verified | Latest 2024 Version Term used to describe the restriction on the movement of AC electric trains or engines in a specified area. - AC hold A luminous and potentially destructive flash or flame in or about the wires, third rail, or electric apparatus caused by the passage of electric current through the air. - Arc Solid wire suspended from the messenger wire from which the contact wire is attached - Auxiliary Wire An alarm generated when the air system to the pantograph has been compromised - Broken paragraph/carbon alarm (BPA) The complete path of which electric current is transmitted from and returned to its source - Circuit Lineman, substation electricians, third rail men, and c and s employees trained and qualified to provide protection services work on or about the electrification system. - Class A Mechanical department employees trained to perform work on top of electric equipment in electrified terriftory under the conditions authorized in these instructions, for their protection only. - Class "B" Employees qualified to perform work in electrified territory. - Class "C" The part of the pantograph made up of a set of carbon strips and horns connected to main frame of the pantograph assembly by means of an apex. - Collector Head Assembly The wire in the catenary from which the pantograph connects current. - Contact Wires The flow of electicity through a conductor - Current A term used to describe restriction on the movement of DC electric trains or engines within a specified area. - DC Hold A de-energized section of the catenary. The limits are designated by dead sections signs at locations specified in the timetable - Dead section 'DS" Electrical circuit/apparatus disconnected from the power sources are considered dangerous to life until tested de-energized and properly grounded. - De-energized (Dangerous to Life) Locomotives and MU cars operated by power received by catenary or third rail. - Electric equipment The rate at which electric energy is transferred by electric circuit - Electric power The portion of the RR equipped for electric train operation - electrified territory A circumstance that presents a hazard to life, infrastructure, or equipment that may interfere with train movement - Emergency conditions Electrical circuit/apparatus connected to a power source - Energized Live (Dangerous to Life) A device that is closed to connect wires or electric apparatus mechanically to ground. - Grounding switch A device which separates signal track circuits from traction return circuits by providing a path for traction return current around insulated block joints - Impedance bond A device located on electric equipment that interrupts the flow of power from the pantograph to the main power transformer - Main circuit breaker (MCB) A stranded wire attached to supported structures from which the contact and/or auxiliary wires are suspended - Messenger wire The closest distance personnel or equipment is permitted to approach an energized or de-energized but not grounded circuit/apparatus. (3 feet—15 feet) - Minimum approach distance Electric equipment used by commuter RR in local passenger service. Most units have a pantograph on each car. There are some units called married pairs