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Route locking
Keeps switches and interlocking functions locked ahead and under the train on an established route
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Signal indication locking
Ensures the position of switches and interlocking functions can only be changed when the signal governing movement toward them is confirmed to be at stop.
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Time locking
Forces a route to remain locked for a predetermined period of time if a signal changes to stop.
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Detector locking
When signals are a stop in an interlocking, if a circuit drops all switches will stay locked.
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Limited speed / cab / aspect
Not exceeding 45 mph for passenger trains, and not exceeding 25 mph for other trains / 120 rate / yellow-green
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Medium speed / cab / aspect
Not exceeding 30 mph for passenger trains, and not exceeding 15 mph for other trains / 75 rate / yellow
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Restricted speed / cab / aspect
Speed that will permit stopping within one half the range of vision, short of train, obstruction, derail or switch improperly lined. Looking out for broken rail and not exceeding 15 mph for entire movement / 0 rate / red
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What's the difference between restricting and slow speed
Not exceeding 15 mph. Where restricted speed you need to be able to stop within one half the range of vision of trains, details, obstruction, improperly lined switches and looking out of broken rail.
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Interlocking limits
Tracks between the extreme opposing signals of an interlocking
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What DON"T we use when a train is approaching?
AMP meter because it may send foreign energy to pick up a relay you don't want
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Define Aspect
The appearance of a fixed signal conveying in indication viewed from the direction of a approaching train.
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Rule 202
When taking or giving control of local control panel, the C&S employee must ask what track and switch blocking, blue flag and bridge controls are in effect, place the same. Locking in effect on control panel and verify status of the blocking on local panel agrees with control center, as directed by RTC.
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What do we call a good faith challenge?
200.9 Right to refuse or perform work.
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Neutral relays tested.
Every 4 years. Test #31d
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Meggering tested.
Every 10 years. Test #32 unless under 500,000 ohms then every year.
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Meggered bad at
500,000 ohms or lower anything at 200,000 ohms must be taken out.
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If cable is bad
jump out cable to spare.
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Activation failure.
When more than 50% of lights are out, when gate doesn't activate within 20 seconds of train arrival and a low illumination of lights.
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What position are Directional sticks in crossing relay
Relay are down.
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What is the job of maintainer?
Provide safety, efficiency and economy.
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When handling b12 battery bank, what must be worn.
Apron, chemical resistant gloves ,safety glasses and face shield.
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If using grinder with just face shield, what must be done.
Use safety glasses
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What is microlok zoning?
When multiple microloks control a interlocking, with each controlling an individual or group of tracks. Each group communicate to each other through they're serial ports to operate the interlocking as a whole. The main advantage to Zoning is that if the unit that controls tks 1 & 2 fail, you can still straight tracks on 4 & 3 because microloks would still be operational.
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How do you adjust track circuit in microtrax?
You have to adjust the margin, in other words shorten the track circuit for less resistance.
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RTC can't get a switch to go reverse or normal in microlok territory, what would you do?
Use switch enabler to be able to get one throw normal if locked in reverse. check the SML or SSR /use microlok zoning.
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What do you use to get into microlok?
Toggle switches Off line menu.
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If there voltage to ground, what do you do?
Get time from RTC and a current reading to ground must be taken, but make sure no train are at or near the location involved . Maximum allowable current to ground is 0.001 amps on bus 110V or lower. And 0.025 on bus 110V or higher.
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What is test 15?
" Switch indication " checks that each switch machine Are lined and locked with its points properly closed corresponding with the requested position before permitting a signal for train movement over the switch.
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What is purpose of test 18?
Make sure the electrical connectivity is good at joints for turn outs and crossovers.
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How many feet til you are considered fouling tracks?
4 feet.
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Definition of indication.
Information conveyed by a signal for approaching trains.
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Where can a safety briefing be held?
Where all members can gather, at job site or at locker room.
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What's the proper way to originate call.
Metro north signal maintainer at CP" " calling central district " "( railroad, title, last name and location )".
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You come to a crossing where there is a problem what are steps
Try to recreate problem and Perform test 26 A observe crossing and make sure it's working as intended.
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A timer relay is rated for 3 mins but runs off for 3 mins and 20 secs. What do you do?
Inform supervisor so they can have relay replaced. “ can only be 110% ex. 3 mins = 180 secs. 10%. = 18 secs.
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A timer is slated for 30 secs and runs off in 25 secs. What is done?
Below is unacceptable needs to be changed.
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While performing test #11 on M3 machine and you are unable to get the latch out to work properly with 3/8 gauge, what steps must be done before you leave machine?
Remove the latch out and adjust the switch to fail on 1/4 and pass on 1/8.
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How can a train be identified after requesting time on track?
By head car number.
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What does CTC stand for?
Centralized Traffic Control.
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What does MBS stand for?
Manual Block System.
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What does CSS stand for.
Cab Signal System.
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A new switch is being installed but cannot be finished what steps must be done?
Spike, block and clamp and install point detector rod for point protection.
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Wires out of service tag?
Red.
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Wires to be moved tag?
Yellow/red ( swing tag) " (yellow is being added).
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How often are 30a done?
Monthly and at grade crossings.
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Who assigns gang watchman?
Person/roadway worker in charge.
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What is proper ppe
Safety glasses, vest and hard hat.
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What is on a bulletin order.
Contains temporary items that affect the movement of trains.
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Tk 1 and RTC reports that the 1N signal not coming in at a microlok location.and there 2 new maintainers What would you have them do?
Extract a code then reset the CP's
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What is a good jsb?
Discuss the safety rule of the day, go through slip trip and falls. Proper PPE. Third rail. Adjacent track speed. Ensure proper tool usage. Place to clear. Ask if anyone had questions and that everyone understand the job.
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What relays does SSR replace?
RWR and NWR.
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What relays does SML replace.
Lock, switch rectifier, overload relays.
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What are 2 ways to lock up a switch
Electronically and mechanically
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Where is cab axle current taken at.
Take cab axle at entering end. Why at entering end?— “ You want it at it’s weakest end, which should be a minimum of 2.0 Amp and acceptable values are Between 2.8 -3.2 amps. Because if it’s more than that It would give the train directly behind it the wrong cab axe Current.
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Good faith challenge and what are the steps?
Rule 200.9 right to refuse or perform work. Remain clear of the work area until the challenge is resolved.
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Explain why overload is important for clutch test?
So that you don't have undo wear on clutch and motor.
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Define break down.
When wires are added or removed from relay circuitry each contact that was modified has to be tested so they are operating as intended on the front and back contacts.
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How to Count a cable?
Clockwise from CIL and counter clockwise from function end.
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How would you determine a signal had an indication problem.
Have RTC put in an absolute block and if signal displays then it is a communications issue, because if there are no circuits down between 2 interlockings, signal will come in.
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When cleaning ballast and lifting rail are done, what hazards can happen?
Create high resistance.
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A switch, signal or crossing is not working and you can't figure it out what would you do?
- If you can't figure it out in 2 hours call supervisor and if it still can't be resolved a c&s39 needs to be applied.
- 62a); recreate problem, observe problem and test switch or crossing
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What are steps you would do if you encounter a fault on the tracks that would create hazard for train movement?
Report the issue to ,RTC or Chief, and your supervisor. Flag trains in both directions about a mile or mile and a half out.
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Switch job, how much man power, what is needed and what test. Jump switch, fill out C&S 39 and J tags ( 10 point question )
start a c & s 19a , get time from rtc , open motor control circuits, jump out switch coming out to keep relay up, perform makes and breaks on switch not being changed to ensure everything was working before you take out other switch. ( manpower ) Foreman, asst. foreman, 4-5 signalmen, 2 test maintainers. ( needed ) all rods associated with switch . Ex. Throw rod, detector rod, lock rod. ( tests ) #1, 1a, 1b & 1c, #10, #11, #15, #18 #30, #32 #44 and clutch test, breakdowns on a C&S 19a.
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Splice job. There's a break in a conductor what needs to be done, manpower, and tests.
( manpower ) foreman/insp. Asst. foreman/insp. 2-3 maintainers/ signalmen, 2 test guys.
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