मशीन के गियर बदलने या गति तंत्र (स्पीड मैकेनिज्म) को समायोजित करने से पहले, आपको अनिवार्य रूप से:

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?