1. Railway signalling systems are designed to maintain a safe time
interval between following trains on the same line. True or False.
2. A semaphore stop signal arm is in its horizontal position.
3. A semaphore upper quadrant stop signal is positioned at 45 degrees.
4. A semaphore distant signal arm is in its horizontal position.
a) What colour lever would operate this signal?
Yellow
b) What colour light would be displayed at night? Yellow
c) What is it telling the driver? Be prepared to stop at any of the stop
signals
associated with that distant signal.
d) What position should its associated lever be in? Normal
5. A semaphore upper quadrant distant signal is at 45 degrees from horizontal.
a) What colour light would be displayed at night? Green
b) What is it telling the driver? All associated stop signals are also in their
"off"
position and line speed may be retained.
6. There are 4 semaphore signals operated by Signal Box "A" and 4 by Signal
Box "B". Trains travel in one direction only towards Box A and then onto Box
"B" The signals are passed in the following order: A1, A2, A3, A4, B1, B2, B3,
B4.
a) Which 2 signals are distant signals? A1 and B1
b) Which signal box has control over the release of A4 signal? "B" Box
c) Which 2 signals are section signals? A4 and B4
d) What is the distance called between A1 and A2 signals? Service braking
distance.
e) What must the block indicator display to allow release of the section signal?
"Line Clear"
7. In 3 aspect signalling:
a) What does red mean to a driver? Stop
b) What does yellow mean to a driver? Be prepared to stop at the next signal
which is red
c) What does green mean to a driver? The next signal is showing a proceed
aspect (yellow or green)
d) How far apart are signals spaced? Service braking distance
8. In 4 aspect signalling a double yellow aspect means:
a) the next signal is displaying .one yellow
b) the driver has reached service braking distance
from a red signal.
9. Position light junction indicators are used on: High speed lines
10. A signal with 2 position light junction indicators to the left of the main signal
and 1 to the right of the main signal:
a) has how many routes available from the main signal? 4 main routes
b) has route indicators in what numeric positions? Positions 1, 2 and 4
11. The change of aspect to proceed must be proven before a position light
junction indicator can be lit. False
12. What type of block signalling is used to control multi aspect colour light
signalling? Track circuit block
13. What aspect would normally be displayed in a controlled signal? Red
14. When would an automatic signal display a proceed aspect? Section ahead
clear and signal ahead lit.
15. When would a controlled signal display a proceed aspect? Only if conditions
are proved correct and the signaller has taken action i.e.set the
route.
16. What is a semi automatic signal? A signal that can be either controlled or
automatic the choice being made by the signaller
17.How far does an overlap extend beyond its associated signal? 200 metres
18. This question relates to an automatic signalled section of track. Going
through this section the train passes signal 1 then 2 then 3 etc in that
order. All signals are currently displaying green. Under normal situations:
a) when would signal 1 turn to red? When the front wheels occupy the track
circuit beyond signal 1 overlap.
b) when would signal 1 turn to single yellow? When the rear wheels of the
train
clear the overlap of signal 2
c) when would signal 1 turn to double yellow? When the rear wheels of the
train clear the
overlap of signal 3
d) when would signal 1 turn to green?
When the rear wheels of the train
clear the overlap of signal 4
19. This question relates to a controlled signalled section of track. Going
through this section the train passes signal 1 then 2 then 3 etc in that
order. Under normal situations:
a) when would signal 1 display a proceed aspect? If the conditions were
proven correct and the signaller had taken action to set
the route.
b) when would signal 1 revert back to red. When the front wheels occupy
the
track circuit beyond
signal 1 overlap.
c) When the overlap of number 2 signal became clear what would happen to
number 1 signal? It would remain red until the signaller
re-set the route.
20. What aspects would be displayed if a position light shunt signal was in the
stop position? Red and white or 2 reds.
21.What aspects would be displayed if a position light shunt signal was in the
proceed position? 2 white lights
22.If a position light shunt signal was displaying a yellow and white light what
would this mean to the driver? Permission is granted to pass this signal
for
shunting purposes.
23. Where would a position light subsidiary signal be situated? At a main
controlled signal.
24. If a position light subsidiary signal was displaying 2 white lights what would it
mean to the driver? Pass the main signal at danger but be prepared tp stop
at
any obstruction within the section.
25. When would the use of a banner repeating signal be required? Where there
is poor sighting of a signal due to
bridges, bends, etc.
26. Where would AWS track equipment be positioned in relation to a signal?
200 metres on the approach to a signal
27. Write down the three items of standard AWS track equipment in the order in
which a train passes over them. Ramp - Permanent Magnet - Electro-Magnet
28. What audible indication would the driver receive when passing over AWS
track equipment if the signal was displaying:
a) Red Horn
b) 1 Yellow Horn
c) 2 yellows Horn
d) Green Bell
29. When would AWS track equipment include a supressor magnet? If on bi
-directional line with AWS applying to signal in one direction only.
30. A relay contact that is made when the relay is energised is known as a
front contact.
31. A relay contact that is made when the relay is de-energised is known as a
back contact.
32. With regards to power supplies what does the term N 50 indicate?
D.C. 50 volt negative
33. With regards to power supplies what does the term BX 110 indicate?
A.C 110 volt live
34. On signalling plans how would the normal aspect of the signal be shown?
A double line through the normal aspect
35. What signal relay and its position would change a signal from red to
proceed? HR
36. What signal relay and its position would change a signal from 1 yellow to
2 yellows? HHR
37. What signal relay and its position would change a signal from 2 yellows to
green? DR
38. This question relates to an automatic signalled section of track. Going
through this section trains pass signal 1 then 2 then 3 etc in that
order. A train is on the approach to number 4 signal, which is showing
green, having cleared the overlap of number 3 signal. There are no lamp
faults. Answer "up" or "down" to indicate the positions of the following relays.
No 1Signal No 2 Signal
No 3 Signal No 4 Signal
1 HR Up
2 HR Up 3
HR Down 4 HR Up
1 HHR Up
2 HHR Down 3 HHR Down
4 HHR Up
1 DR Down 2
DR Down 3 DR Down 4 DR Up
1 ECR Up 2
ECR Up 3 ECR Up 4 ECR Up
2 ECPR Up 3 ECPR up 4 ECPR Up 5
ECPR Up
39. As question 38 with a train approaching number 4 signal at green only this
time there is no lamp lit in number 2 signal. Answer "up" or "down" to indicate
the positions of the following relays.
No 1 Signal No 2 Signal
No 3 Signal No 4 Signal
1 HR Down
2 HR Up 3
HR Down 4 HR Up
1 HHR Down 2
HHR Down 3 HHR Down 4
HHR Up
1 DR Down
2 DR Down 3 DR Down 4 DR Up
1 ECR Up
2 ECR Down 3 ECR Up
4 ECR Up
2 ECPR Down 3 ECPR Up 4 ECPR Up
5 ECPR Up
40. The miniature relays, EPRs, in each signal aspect perform 2 functions.
What are they? They change over to auxilliary filament when the main
filiment burns out and they set the alarm
to warn that a main filiment
has failed in the system.
41. If the main filament of a red aspect fails and the lamp is then lit using its
auxilliary fillament, what effect does this have to the signals ECR?
None. The ECR is checking that there is a lamp lit and is not concerned
as to
which filiment.
42. If both main and auxilliary filaments fail in the double yellow aspect when the
signal is displaying 2 yellows what effect does this have to the signals ECR?
None. The ECR is not in circuit with the double yellow aspect and is therefore
only checking red, single yellow and green aspects.
43. If both main and auxilliary filaments fail in the red aspect when the
signal is displaying red what effect does this have to the signals ECR?
The ECR will drop.
44. If the main filament of a lamp burns out dropping the EKSR, what happens to
the EKSR when the signal changes aspect using a lamp that is burning on its
main filament? The EKSR will remain down. Once the EKSR drops it can only
re-pick by the pressing of the re-set button.
45. In controlled signalling circuitry what is the purpose of the TSR? The TSR
ensures that the signal, having given a proceed aspect and allowed a train
to
pass, will remain at red until the signaller has re-set the route.
46. What is the most important test to be made on a track circuit?
Drop shunt
47. By answering "up" or "down" what happens to the following track circuit
characteristics if the weather conditions change to very wet?
a) Ballast resistance Down
b) Relay voltage Down
c) Relay front contact pressure Down
d) Drop shunt Up
48. What is the preferred method of bonding track circuits, parallel or series?
Series
49. Single rail track circuits use only one rail for traction return purposes.
50. Which of the following track relays would be appropriate in an OLE traction
area?
A.C double element relay D.C Immune
Standard D.C relay
A.C relay D.C. Immune
D.C. relay A.C. immune
51. Which of the following track relays would be appropriate in a D.C. traction
area?
A.C double element relay D.C Immune
Standard D.C relay
A.C single element relay
D.C. relay A.C. immune
52. An impedance bond:
a) allows a free flow of d.c. traction return current across the insulated rail
joints. True
b) is only used at the relay end of a track circuit. False
c) acts as a step down transformer at the feed end of a double rail track
circuit. True
d) requires equal amounts of d.c. traction current to flow along each rail to
allow track circuit to work effectively. True
53. A stock rail gauge tie is a legal requirement if the points are facing points.
True
54. In order to report back the position of points, where would you stand.
Facing into the tips of the points.
55. The moving rails at points are called the switch rails.
56. The fixed rails at points are called the stock rails.
57. If the points were set in their "normal" position for the straight route with a
diverging junction to the left, which one of the following would be the correct
method of reporting back the position of the points?
a) Points standing normal
b) Points not standing reverse.
c) Left hand switch rail closed.
d) Right hand switch rail not closed.
58. What is the standard operating voltage for point machines and rail point
clamp locks? 120 volts D.C.
59. Before detection can be made there are 3 conditions to be proved. What are
they? Closed switch rail closed. Open switch rail open. Lock engaged.
60. Rail point clamp locks are operated by which one of the following methods?
a) Mechanical
b) Electro mechanical
c) Electro-pneumatic
d) Electro Hydraulic
