2009 CTs, point

[SARVESH KUMAR]

Peter Sir,

please check the point control table of IRSE 2009 of Module-3 and given fedback to me for best preparation


with regards
sarvesh kumar

[SARVESH KUMAR]

Sir,
please check point control table for IRSE 2009 MODULE-3

WITH REGARDS
SARVESH KUMAR

[Peter]

Hello

Another reasonable attempt, but there are a couple of things that you should look at and understand about switch diamonds - there is no flank protection offered by switch diamonds (there is no "divergance" as such through them, they only give a wheel path straight on) and you have called them in some routes as you would for flank. It used to be a common practice to number the diamonds as with one of the associtated point ends so you would naturally call them when the associated plain lead was called, but they are separately numbered here so only call them when the route is actually over them (ie no nead for 378A(M), 373A(S))

In a copuple of entries 353B(X) and 371A(D) the letter in the brackets is the route indication from the route box rather than (as it should be) the class of route (in these cases S - on this layout, the route boxes for the shunts only have shunt class of route and hence do not state S).

You have included entries for 416 and 412 in R>N on the basis that the overlap for 378 is via 237N. If this was the case, as discussed above, you would probably not call the switch diamonds. In the absence of any other information it would have not been unreasonable to assume that the overlap goes this way, however, there is an overlap symbol between BV and BX track. The only signal that protects things going Up the up branch at that point it 378 and hence there is an overlap that way. In all likely hood, 237 would be the hinge points for a swinging overlap for 378. Therefore, I think that 416B(M) and 412B(M) should be in N>R with the note "W 237R", 236 are called normal when the route up to 378 is used and the overalp is via 237R.

You have included 416B( C ) and 412B( C ). Bear in mind that the condition for the call on is that the platform was occupied, so there is no overlap proving for a call on move hence these are not required.

Depending on the principles you are working to, there may or may not be shunt overlaps. In this, there is a shunt O/L shown between CD and CE tracks for the limit of shunt. This indicates that shunt O/L are the practice for this layout. This means that 414B(S) and 418B(S) should be included becasue they read up to 378.

In the route locking section, you have gone to the track beyond BU in several cases (eg AF, BT). If the switch diamonds are not considered to be linked to the plain lead, the route locking can stop at the track over them assuming all of the joints to the relvant tracks are not foul. If in doubt, including them is not an issue, but I would say why.

When you have presented the track for the routes which time off the overlap, you have included the O/L track in the bracket which implies that if they are occupied for time, the O/L will release. You have also included in the Occupied section, both tracks separated by a comma. This means AND, so if you have a short train routed up to 378 which only occupies BS track, as written, BS and BR are not both occupied so the overlap will not time off. for 416B(M) and 412B(M) you have taken the locking to DR on the basis of the way you have considered these routes to need the switch diamones N. The entry will be different based on the discussion above. All of these points together mean that I think the entry for 416B(M) should be

TC clear---------------------------------or TC Occ
DF,DH,DJ,BN,BP,BT,BU,BV[BS,BR.....BS OR BR] 45sec

Peter

[SARVESH KUMAR]

Note that the IRSE are proposing a couple of significant changes in this module, probably for this year's examination.

See http://www.irseexam.co.uk/showthread.php...10#pid2510

Thanks a lot, much appreciated.

Still no formal announcement as far as I know; I do suggest that those registering to sit the examination (NB CLOSING DATE IS PRETTY SOON NOW!) explicitly ask about:

Module 1:
Will it definitely be a 90 min exam with 3 questions to be answered?

Module 3:
Will a blank CT for Points and Signal be provided?
What are the rules if you want to use one of your own design?
Will the CTs only count as 1 question out of 3 to be answered?

Module-3
Point control table attached here as per modified control table provided by IRSE, point control table prepared as IRSE 2009 module-3 with answer

from
Sarvesh kumar

[SARVESH KUMAR]

Hello

Another reasonable attempt, but there are a couple of things that you should look at and understand about switch diamonds - there is no flank protection offered by switch diamonds (there is no "divergance" as such through them, they only give a wheel path straight on) and you have called them in some routes as you would for flank. It used to be a common practice to number the diamonds as with one of the associtated point ends so you would naturally call them when the associated plain lead was called, but they are separately numbered here so only call them when the route is actually over them (ie no nead for 378A(M), 373A(S))

In a copuple of entries 353B(X) and 371A(D) the letter in the brackets is the route indication from the route box rather than (as it should be) the class of route (in these cases S - on this layout, the route boxes for the shunts only have shunt class of route and hence do not state S).

You have included entries for 416 and 412 in R>N on the basis that the overlap for 378 is via 237N. If this was the case, as discussed above, you would probably not call the switch diamonds. In the absence of any other information it would have not been unreasonable to assume that the overlap goes this way, however, there is an overlap symbol between BV and BX track. The only signal that protects things going Up the up branch at that point it 378 and hence there is an overlap that way. In all likely hood, 237 would be the hinge points for a swinging overlap for 378. Therefore, I think that 416B(M) and 412B(M) should be in N>R with the note "W 237R", 236 are called normal when the route up to 378 is used and the overalp is via 237R.

You have included 416B( C ) and 412B( C ). Bear in mind that the condition for the call on is that the platform was occupied, so there is no overlap proving for a call on move hence these are not required.

Depending on the principles you are working to, there may or may not be shunt overlaps. In this, there is a shunt O/L shown between CD and CE tracks for the limit of shunt. This indicates that shunt O/L are the practice for this layout. This means that 414B(S) and 418B(S) should be included becasue they read up to 378.

In the route locking section, you have gone to the track beyond BU in several cases (eg AF, BT). If the switch diamonds are not considered to be linked to the plain lead, the route locking can stop at the track over them assuming all of the joints to the relvant tracks are not foul. If in doubt, including them is not an issue, but I would say why.

When you have presented the track for the routes which time off the overlap, you have included the O/L track in the bracket which implies that if they are occupied for time, the O/L will release. You have also included in the Occupied section, both tracks separated by a comma. This means AND, so if you have a short train routed up to 378 which only occupies BS track, as written, BS and BR are not both occupied so the overlap will not time off. for 416B(M) and 412B(M) you have taken the locking to DR on the basis of the way you have considered these routes to need the switch diamones N. The entry will be different based on the discussion above. All of these points together mean that I think the entry for 416B(M) should be

TC clear---------------------------------or TC Occ
DF,DH,DJ,BN,BP,BT,BU,BV[BS,BR.....BS OR BR] 45sec

Peter

Sir
I heartly thanks for this help

with regards
Sarvesh kumar