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. 2023 May 26;9(6):e16744. doi: 10.1016/j.heliyon.2023.e16744

Table 2.

Subjects’ responses on the meaning of the safety sign. Note: Correct answers are in bold and italics.

ISO 7010 Number Sign Choices for the meaning of the sign n %
W020 Image 1 Do not replace the bulb unless you are authorized 8 5.8
Excessive light source 28 20.4
Falling object hazard 53 38.7
Overhead obstacle 48 35.0
Missing 2
E034 Image 2 Slide equipment to move 8 5.8
Refrigerator can move
Door slides left to open 66 47.5
Exit door is on the left side 65 46.8
Missing
M021 Image 3 Disconnecting the machine or equipment before carrying out maintenance or repair 114 84.4
The train changes track 4 3.0
Pull the handle to stop 6 4.4
Change the line 11 8.1
Missing 4
P041 Image 4 Go back to work 0.0
No pushing 3 2.2
Waiting is forbidden here 20 14.5
No leaning against 115 83.3
Missing 1
W016 Image 5 Electrical hazard 3 2.2
Danger of death 101 73.2
High voltage 3 2.2
Toxic material 31 22.5
Missing 1
E007 Image 6 Evacuation assembly point 137 98.6
Attention, there are people nearby 2 1.4
Entry is prohibited. Only certain people can enter. 0.0
Enter with a group 0.0
Missing
M012 Image 7 Stairs 7 5.1
Escalator 51 37.0
Use handrail 66 47.8
Inclined road 14 10.1
Missing 1
F016 Image 8 Prevent the spread of fire 29 21.2
Protect yourself from fire 32 23.4
Location of a fire blanket 73 53.3
It is forbidden to approach the fire area 3 2.2
Missing 2
E012 Image 9 Take a shower before entering the building 16 11.5
Location of a safety shower 123 88.5
Do not use this device in a bathtub, shower, or water-filled reservoir 0.0
Caution, you may get wet 0.0
Missing
W018 Image 10 Low temperature/freezing conditions 1 0.7
Machinery may start automatically 56 40.9
Heavy wind 32 23.4
Biological hazard 48 35.0
Missing 2
P011 Image 11 No open fire 10 7.2
No fire 6 4.3
Do not extinguish with water 116 84.1
Do not extinguish the fire 6 4.3
Missing 1
M006 Image 12 It is forbidden to insert the plug into the outlet 3 2.2
Disconnect mains plug from the electrical outlet 54 38.8
When pulling the plug from the outlet, pull the plug, not the cord 54 38.8
Disconnect the plug before carrying out maintenance or repair 28 20.1
Missing
P014 Image 13 Choking hazard 12 8.8
No reaching in 7 5.1
No access for people with metallic implants 112 82.4
Crushing of hands 5 3.7
Missing 3
E015 Image 14 Turn off the tap after use 22 16.1
Hot water 6 4.4
Location of drinking water 99 72.3
Not drinking water 10 7.3
Missing 2
P020 Image 15 Do not use lift in the event of fire 132 95.0
Do not use the lift for more than one person 4 2.9
Do not use the lift for people 0.0
Do not approach with open flame 3 2.2
Missing
W003 Image 16 Aircraft flight area 4 2.9
Chemical spill hazard 2 1.4
Radioactive material or ionizing radiation 131 94.2
Biological hazard 2 1.4
Missing
M029 Image 17 Sound horn 109 78.4
Do not sound horn 3 2.2
Caution, very high horn sound 25 18.0
Horn can be played at certain times 2 1.4
Missing
E008 Image 18 Clear the glass 7 5.1
Glass breakage hazard 42 30.7
Holding the bar is prohibited 21 15.3
Break to obtain access 67 48.9
Missing 2
P048 Image 19 Do not run 124 89.2
No pedestrian 10 7.2
No thoroughfare/trespassing 5 3.6
Use this walkway 0.0
Missing
W024 Image 20 No reaching in 28 20.1
Put your hand inside 9 6.5
Do not touch 0.0
Crushing of hands 102 73.4
Missing
M005 Image 21 Connect an earth terminal to the ground 111 79.9
Heavy load (dumbbells) 9 6.5
High radiation area 2 1.4
Strong signal area 17 12.2
Missing
E010 Image 22 Location of an automated external heart defibrillator device 37 27.4
High voltage power can cause your heart to stop 55 40.7
No access for people with active implanted cardiac devices 20 14.8
Check the power level of your implanted cardiac device 23 17.0
Missing 4