 Tusaale hadduu damacsan yahay inuu dhaqtarnimo ama injineernimo soo barto waa inuu u tagaa dhowr ka mid ah dhaqaatiirta ama injineerrada ugu caansan deegaanka uu ku nool yahay, ee weliba muddo fog ku soo shaqeynayay xirfaddaas, waana inuu weydiiyaa suaalan: 