Safety signs: why it matters
Safety signs give an instant, wordless instruction on a busy site where people may not share a first language. Reading them correctly is a basic site survival skill, and the test checks you know each type on sight.
There are four main categories, set by the Health and Safety (Safety Signs and Signals) Regulations 1996, each with its own colour and shape. Learn the pattern and you can read any sign even if you have never seen that exact pictogram before.
Safety signs revision notes
The points below are the core of what the CITB test wants you to know on this topic. Learn these and most questions answer themselves.
Prohibition (red circle)
A red circle with a red diagonal bar means you must NOT do something, for example no smoking or no entry. Red always means stop, danger or prohibition.
Mandatory (blue circle)
A solid blue circle means you MUST do something, for example wear head protection or eye protection. Blue means a required action.
Warning (yellow triangle)
A yellow triangle with a black border warns of a hazard or risk, for example deep excavation, overhead load or flammable material. Triangle means caution.
Safe condition (green)
A green square or rectangle shows safe conditions and emergency routes, for example first aid, fire exit and assembly points. Green means safety and escape.
Fire equipment (red square)
Red square or rectangular signs locate firefighting equipment such as extinguishers and alarm call points. Red here is about fire equipment, not prohibition.
Shape carries meaning
If you cannot read the wording, the shape and colour still tell you what to do: circle to act or stop, triangle to take care, square or rectangle for information and escape.
Hear a question in Polish
The questions stay in English, exactly like the real CITB test, but you can listen to each one read aloud in native Polish. Press Play in Polish below to try it.
What do green safety signs usually indicate?
Prohibition
Fire safety
Safe conditions
Warning
Every wrong answer can also come with an AI explanation that points to the specific rule behind the correct answer, so you learn from each mistake instead of just memorising. Native Polish audio and AI explanations are two things you will not find on other CSCS practice sites.
Safety signs practice questions
Five questions in the real CITB format: one stem, four lettered options, one correct answer. Select Reveal explanation to check your answer and read why it is right.
Q1. What color is used for fire equipment signs?
- A.Red
- B.Blue
- C.Yellow
- D.Green
Reveal explanation
Correct answer: A. Red
Fire equipment signs are red because red is associated with danger and urgency.
Q2. What shape are prohibition signs usually?
- A.Circular with a line through it
- B.Triangular
- C.Rectangular
- D.Circular without a line
Reveal explanation
Correct answer: A. Circular with a line through it
Prohibition signs are circular with a red border and red line indicating an action is not allowed.
Q3. Which symbol would typically be found on a mandatory sign?
- A.Exclamation mark
- B.White pictogram
- C.Cross
- D.No symbol, just text
Reveal explanation
Correct answer: B. White pictogram
Mandatory signs contain a white pictogram on a blue background, instructing mandatory actions.
Q4. What symbol might you see on a mandatory sign?
- A.A red triangle
- B.A white cross
- C.A blue circle
- D.A green square
Reveal explanation
Correct answer: C. A blue circle
A blue circle is used on mandatory signs to indicate specific actions that must be performed.
Q5. Which of these signs would you expect to find near a high noise area?
- A.Wear ear protection
- B.No entry
- C.Slippery surface
- D.First aid kit
Reveal explanation
Correct answer: A. Wear ear protection
In high noise areas, a mandatory sign requiring ear protection will typically be displayed.
Common mistakes
These misconceptions catch people out in the test and on site. Unlearn them before you sit the real exam.
Mistake 1: “Green means it is safe to proceed, like a traffic light.”
Correct: Green signs show safe conditions and emergency escape, first aid and exits, not permission to carry on with a task. Do not treat a green sign as a go-ahead to start work.
Mistake 2: “Blue is just an information colour.”
Correct: Blue circles are mandatory, they tell you something you MUST do, such as wear PPE. Ignoring a blue sign is ignoring a legal instruction, not skipping a suggestion.
Mistake 3: “Warning signs are red triangles.”
Correct: Warning signs are YELLOW triangles. Red is for prohibition (a circle with a bar) and for fire equipment. Mixing these up can mean missing a real hazard warning.
Related CSCS topics
Build a complete picture by practising these related syllabus areas too: