1. Introduction

Perhaps the machine which is most associated with electrical engineering is an electric motor. With their function of converting electrical energy to mechanical energy, electric motors have changed our lives and jobs, making them less laborious. They come in various sizes, types and applications and we can hardly imagine our lives without them. This unit is going to look at them in more detail, especially in the context of dimensions and troubleshooting.

 

Contents:

  • Numbers and dimensions:

Length in metres, weight in kilogrammes….

  • Present Perfect Simple in troubleshooting:

Have you fixed the machine? Have you checked the bolts? Have you replaced the battery?

  • Present Perfect Simple vs. Past Simple; the Passive voice to make texts more formal:

Yes, the machine has been fixed. The bolts were checked yesterday and the battery was exchanged five days ago.