कार्यशाला के फर्श पर ईंधन या तेल के रिसाव (spillage) से जुड़ा एक प्रमुख जोखिम निम्नलिखित में से कौन सा है?

Which hand tool is most suitable for tightening or loosening nuts of different sizes without changing tools?

During cutting operation with a hacksaw, the blade teeth should face:

Which hammer is commonly used in fitting and sheet metal work associated with electronic chassis fabrication?