Controller of Site Safety (COSS) Practice Exam

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• What is the ratio of blue hats to white hats?
• If a work task is identified in an open line or 6Ft, what actions are necessary for the group to go over and complete the work?
• If you need to move a trolley near a crossing, which crossing type should be avoided?
• Which term for approved pedestrian paths is found in Hazard Directory?
• When setting up a fenced area, which method should be used to check for buried services before any ground disturbance?
• When is it necessary for the COSS to designate licensed professionals for asbestos or silica?
• When should hearing protection be provided to address noise hazards?
• What extra precautions should the COSS implement for night-time or shift work?
• Which regulatory framework principally governs the duties of a COSS in the UK construction industry?
• Which sequence is correct for applying TCOD protections?
• Which document includes information on Level Crossings?
• What phonetic spelling corresponds to the code DP04?
• When handing a line blockage to another COSS, which COSS must inform the signaller of the change in COSS?
• How should a COSS manage works near live rail or utility assets?
• What must happen to the Non-cyclical Safe Work pack before it can be used?
• For blue mesh fencing or two-strand tape fencing, what distance should be kept from an open line when traffic is up to 40 mph?
• When working within 200 metres of your protecting signal and affecting the safety of the line, what must you do?
• Blue mesh fencing distances relative to speed: up to 40 mph at 1.25 m, over 40 mph at 2 m. Which statement is correct?
• What must be used as a hand danger when it is placed on the approach to the site of work?
• Who verifies and signs a PTW before work begins?
• What is the correct distance from an open line for rigid fencing when traffic is over 90 mph?
• What must a COSS ensure is in place before site works begin regarding the Construction Phase Plan?
• How should a COSS decide when a risk control is no longer necessary or must be escalated?
• When must a Non-cyclical Safe Work pack be issued to the COSS?
• Which factor should trigger a re-evaluation of existing risk controls?
• Why is soil classification important for trench safety?
• Which actions should the COSS take to manage fire safety and prevention on site?
• What is the COSS's responsibility in communicating safety matters to the client and designers?
• Open line working is prohibited if the risk affects what aspect?
• How does the COSS use a Job Safety Analysis (JSA) in practice?
• Why is it important to record environmental risk monitoring data and corrective actions?
• What must accompany the first det?
• Line Diagrams: which item is included?
• How many detonators are required per blocking point?
• Which of the following should be communicated to all on site as part of the Construction Phase Plan?
• What is required before you place your agreed TCOD on?
• What must the COSS ensure about safe access and egress routes around the work area?
• What is the criteria for using a Lockout Device (LOD)?
• Which action demonstrates effective coordination with Temporary Works Coordinators (TWCs) to protect structural safety?
• What is the role of site traffic marshals in coordinating with site plans?
• How does a COSS use method statements in planning work on site?
• Open line working is prohibited at night unless you have what speed restriction?
• What is the role of supervisor oversight in maintenance isolation and restart?
• TVP checks verify which of the following?
• Which action describes transferring control of a level crossing to local management during work?
• Which statement correctly describes the color coding of TCODs?
• How should the COSS maintain training records, and what should they include?
• What is the primary purpose of the Controller of Site Safety (COSS) on a construction site?
• What should the COSS do regarding RAMS after learning from an incident or near-miss?
• What distinguishes a high-risk activity requiring a PTW from routine works?
• What special precautions must the COSS ensure when work is planned in a confined space?
• Who is responsible for briefing a site warden?
• How should a COSS manage subcontractors with differing safety cultures on site?
• What should the COSS establish for emergencies affecting site safety?
• The Blue Circle sign is associated with which condition?
• What is required when appointed to install rigid fencing?
• Which fencing type should be placed 1.25 meters from an open line when speeds exceed 90 mph?
• Which document lists the Controlling Signal Box / Panel / Workstation?
• Which color corresponds to a BH TCOD?
• What is required for a safe shutdown of activities at end of shift or project milestone?
• What is the recommended approach for addressing noise and vibration hazards on site?
• In the context of work at height, what should the rescue plan include?
• What actions can a COSS take to promote a positive safety culture on site?
• What is the purpose of a Permit to Work (PTW) system, and how does the COSS use it?
• Who must be appointed to take charge of the trolley?
• What is the first step in the procedure for an emergency phone call?
• In safety critical communication, what does ABC stand for?
• What is a requirement for using permanent, fixed, or automatic track warning systems?
• What is the role of CPP in ensuring safety standards across subcontractors?
• When must a hand danger be placed on the approach to the site of work?
• Which of the following is a criterion for crossing the line procedure related to power?
• What should end-of-shift handover include to support safety continuity?
• In the crossing the line procedure, which of the following relates to signaling?
• Where must a hand danger be placed on the approach to the site of work?
• What distance must you not get within of a protecting signal?
• After an incident, what is the COSS's responsibility in reporting and investigation?
• Which additional information accompanies the hand danger details?
• How should the COSS respond to adverse weather conditions affecting safety?
• Where would the detonator protection be placed if the line is bidirectional?
• How can you familiarise yourself with the worksite?
• What is the purpose of a Job Safety Analysis (JSA) and how does the COSS use it?
• How should tool maintenance records be treated as part of safety governance?
• What is the criteria for using TCODS as additional protection?
• In the hierarchy of control, which term is listed as a control option?
• For blue mesh fencing or two-strand tape fencing, what distance should be kept from an open line when traffic exceeds 40 mph?
• Who should be appointed to erect rigid fencing?
• What role does PPE play in the COSS's safety management approach?
• What is the minimum distance between detonators?
• What is the purpose of a Permit to Work (PTW) system in high-risk tasks?
• What is the COSS's duty regarding first aid provision on site?
• What shows when TCODS are applied?
• Is loading a trolley beyond the Safe Working Load permitted?
• How does a COSS monitor ongoing compliance with safety requirements on site?
• How far apart should the detonators be placed?
• Open line working is prohibited when?
• How does the COSS ensure safe access to machinery and equipment during maintenance?
• What protection method must be used when operating a hand trolley within a line blockage?
• Which color is the TVP holder or Green Square PTS helmet color?
• Open line working at night is allowed only if you have which speed restriction?
• A Token Area is designated for Token/Staff protection. Which option best describes this requirement?
• Why is welfare management part of the COSS's duties?
• For rigid fencing located near an open line, what distance is required when traffic exceeds 90 mph?
• In safeguarded environments, how are lines typically managed?
• What is the minimum number of people required to push a trolley?
• During crossing the line procedure, which action ensures coordination?
• Which level crossing must be avoided when moving a trolley?
• Which measures must the COSS ensure for excavations and trench safety?
• Minimum distance that must be maintained when working separated (line speed does not affect this measurement).
• When moving a trolley near a crossing, which crossing type must be avoided?
• What is the maximum TVP site coverage?
• What is the primary role of the PIC?
• Contract terms influence site safety; what must the COSS check in supplier safety documentation?
• What competence must an appointed site warden hold?
• Before taking any line blockage, which item must be agreed with the signaller?
• What controls are typically required for work at height as overseen by the COSS?
• In what distance is a site warden not required?
• Is it permissible to have only one person pushing a trolley during a line blockage?
• Which statement best describes the PIC's accountability?
• How does the COSS incorporate environmental considerations into safety planning?
• Which document lists lines located at the site, speed and direction of trains, and the controlling signal box/panel/workstation?
• What is the primary role of the COSS?
• How should the COSS manage environmental risk monitoring on site?
• What kind of documentation is essential for evidence of safety governance under the COSS role?
• Open line working at night is prohibited unless you have what restriction?
• Responsibility when talking to the signaller as a COSS?
• Which of the following is a criterion for using a Lockout Device (LOD)?
• Which of the following is a criterion for crossing the line procedure?
• What is the COSS's obligation regarding asbestos and silica exposure controls?
• When using detonators from points, where should they be placed?
• If work affects the safety of the line in an absolute block area, what protection can be used?
• What is the ratio of blue hats to white hats?
• How should the workforce be briefed when introducing a new task to ensure understanding?
• Hazard Directory: which item is included?
• How does the COSS address handling of hazardous substances under COSHH?
• What is the maximum gradient on which a trolley can be used?
• What is the minimum time that a group must be in a position of safety before the train passes?
• When using detonators protection, where is the first det located?
• Green Square indicates which status?
• Which item is used to identify line blockage coordination?
• What is the criteria for using a stabled train as additional protection?
• After using a Token/Staff as additional Protection, what must be done with it?
• For detonator protection on a bidirectional line, where should protection be placed?
• In what instance is a site warden not required?
• What is the COSS's duty regarding temporary works schemes that impact structural safety?
• Which condition allows the use of TCODS as additional protection?
• What is the criterion for using a Signal Post Replacement Switch (SPRS)?
• What criteria determine a worker's competence for a task requiring a COSS's approval?
• Which option is NOT typically listed in Hazard Directory?
• If work affects the normal operation of a level crossing, which action should be taken?
• What is the COSS requirement for a TVP?
• Which other safety roles must a COSS coordinate with to manage temporary works safely?
• What is the COSS's role in reporting near-miss events, and why is it important?
• When live electrical work is permitted, what must the COSS ensure?
• What considerations must be taken into account when loading a trolley?
• What constitutes a safe system of work and how does the COSS ensure it is implemented?
• During crossing work affecting operation, what action ensures the crossing is under local control?
• Who places the Do Not Move board when a stabled train is used for protection?
• Where should detonators placed when using from points be placed?
• Which information should be included in the hand danger documentation?
• Which statement best describes the SPRS signal state requirement?
• During a safety procedure, how long must a group stay in a position of safety before a train passes?
• What is the minimum time a group must wait in safety before a train passes?
• What height should fencing spikes reach?
• What distance should fencing spikes be placed apart from one another?
• What is the standard height for fencing spikes?
• Criteria for using the crossing the line procedure.
• Which fencing type requires a 2 meter clearance from an open line when road speeds exceed 40 mph?
• What is the Condition for using an engineering possession reminder?
• Which fencing type should be positioned 1.25 meters from an open line when speeds are up to 40 mph?
• In RAMS, which item is identified to ensure accountability for safety controls?
• In what instances are you required to use the phonetic alphabet in communication?
• In relation to hazardous substances management, what is the purpose of worker training and monitoring?
• How frequently should a gap be left in fencing when work is not taking place?
• What is the difference between isolation and lock-off, and how should a COSS manage them?
• How should near-miss incidents be handled on site?
• How does the COSS enforce tool control and housekeeping on site?
• What do you need to gain if you need to change the proposed safe system of work?
• What is the purpose of a change control record in safety governance?
• In the hierarchy of control, which term is a safeguarding control option?
• Which statement is true regarding crossing the line procedure when carrying tools?
• What is the maximum number of lines you may cross when using track warning systems?
• What tool does the COSS typically use to brief the workforce on safety requirements for a new task and why?
• What is a COSS's role in managing electrical safety on site?
• Colour of a BH TCOD?
• What is the maximum speed allowed for movements in a possession with a safeguarded environment?
• What must the COSS consider regarding traffic management on site?
• Which statement best describes the COSS's accountability?
• What is the criteria for using disconnection as additional protection?
• What is the criteria for using Token/Staff as additional protection?
• When two or more COSS are required to share a line blockage, which action is required?
• When conducting a risk assessment for a high-risk activity, what key elements must the COSS confirm are in the RAMS?
• Which statement best describes the COSS's role in relation to the CDM Regulations 2015?
• Which sign indicates that work is not allowed to proceed unless accompanied?
• Which phrase is the phonetic spelling for DP04?
• Who is responsible for briefing a work group?
• Before acting as COSS, which item of information must you know about the location you are to work at?
• Colour of a FB TCOD?
• How many detonators per blocking point?
• What considerations does the COSS make for safe use of hand and power tools?
• Which designation is responsible for trolley safety during a line blockage?
• What color is the TVP holder or Green Square PTS helmet?
• What steps should a COSS take if there is persistent non-compliance by a contractor?
• Which phrase is the phonetic spelling for NR103?
• What will you be given by the signaller when you agreed TCOS have been placed as your protection?
• How does the COSS support continuous improvement in safety performance on site?
• What extra safety oversight is required by the COSS for demolition activities?
• Which term is listed under the hierarchy of control as a lookout measure?
• In work near utility assets, what is required before starting the task?
• When can a COSS act as a Site Warden and a COSS? (Assuming they have the Site warden competence)
• Open line working is prohibited under which condition?