यदि सुरक्षा चिह्न पीले रंग की पृष्ठभूमि में चेतावनी (Warning) को दर्शाता है, तो इसका आकार क्या होता है?

Which of the following personal habits is considered an unsafe personal act rather than a direct structural cause of an occupational workplace hazard?

If a safety sign has a blue background color, which category of safety signs does it represent?