$ sudo apt-get update
$ sudo apt-get install qelectrotech-examples 

qelectrotech-examples is installed in your system.

Make ensure the qelectrotech-examples package were installed using the commands given below,

$ sudo dpkg-query -l | grep qelectrotech-examples *

You will get with qelectrotech-examples package name, version, architecture and description in a table

qelectrotech-examples package basic information: