Controller of Site Safety (Correct Questions And Answers
2026/2027) Questions With Complete Solutions
How long can a lookout work before requiring a break?
2 hrs
What is the name of a line blockage form?
NR3180
Who can take a line blockage? (3)
COSS, IWA or PC
During a line blockage work is affecting the safety of the line
less than 200m beyond protecting signal. What needs to happen?
An additional signal before the protecting signal needs to be
held at danger
What is the correct process for keying a signal?
1)Speak to the signaller to get permission to key the signal
2) Confirm it is showing a green and key the signal to danger
3) Advise the signaller the signal is now at danger
4) When you are giving up the blockage, confirm with the
signaller you are keying it back to auto.
With regards to a line blockage, when must a hand danger signal
be used? (3)
1. Work affects the safety of the line
2. Work is being done by a group
3. Line blockage with additional protection
, How would you use a red hand signal for a line blockage? (2)
1) The hand signal must be placed on the ground in the 4ft,
cleary visible to drivers in the normal direction.
2) If bi di/SLW this must be done for both directions
Methods of additional protection (7)
Detonator
Track Circuit Operating Device (TCOD)
Signalling Disconnection
Token (Single line only)
Lock out devices
EPR
Trains stabled at Stations
How are detonators used as additional protection?
PLB board in the 4ft in line with the signal
3 dets, 20m apart beyond the signal, with the first detonator in
line with the signal
A block is to be taken around a train, in a platform, during
daylight. What needs to be done
Do not move board or red flag
A block is to be taken around a train, in a platform, during
darkness
Red light (Flashing or steady).
What type of rail would an orange TCOD be used?
Bullhead
2026/2027) Questions With Complete Solutions
How long can a lookout work before requiring a break?
2 hrs
What is the name of a line blockage form?
NR3180
Who can take a line blockage? (3)
COSS, IWA or PC
During a line blockage work is affecting the safety of the line
less than 200m beyond protecting signal. What needs to happen?
An additional signal before the protecting signal needs to be
held at danger
What is the correct process for keying a signal?
1)Speak to the signaller to get permission to key the signal
2) Confirm it is showing a green and key the signal to danger
3) Advise the signaller the signal is now at danger
4) When you are giving up the blockage, confirm with the
signaller you are keying it back to auto.
With regards to a line blockage, when must a hand danger signal
be used? (3)
1. Work affects the safety of the line
2. Work is being done by a group
3. Line blockage with additional protection
, How would you use a red hand signal for a line blockage? (2)
1) The hand signal must be placed on the ground in the 4ft,
cleary visible to drivers in the normal direction.
2) If bi di/SLW this must be done for both directions
Methods of additional protection (7)
Detonator
Track Circuit Operating Device (TCOD)
Signalling Disconnection
Token (Single line only)
Lock out devices
EPR
Trains stabled at Stations
How are detonators used as additional protection?
PLB board in the 4ft in line with the signal
3 dets, 20m apart beyond the signal, with the first detonator in
line with the signal
A block is to be taken around a train, in a platform, during
daylight. What needs to be done
Do not move board or red flag
A block is to be taken around a train, in a platform, during
darkness
Red light (Flashing or steady).
What type of rail would an orange TCOD be used?
Bullhead
