Listening/Reading: New Aerial for Mobile Communications
Multiple-choice exercise
Listen to or read the transcript on pp. 122-123 in the coursebook (Bonamy, D. (2013). Technical English Level 4 Coursebook. Pearson Longman) and complete the following tasks.
They have just launched a new product.
True
False
The antenna is solid.
True
False
Conventional aerials are often made of copper.
True
False
The most frequent complaint about conventional aerials is that they break easily.
True
False
Aerials are made of a non-conductive material.
True
False
Aerials generate electromagnetic radiation.
True
False
The recording´s content informs us about dish antennas.
True
False
Radio waves are magnetic waves.
True
False
To send out a radio signal, vibration is needed.
True
False
The sent waves are perpendicular to the rod aerial.
True
False
If a metal has high fluidity at a low melting point, it may be liquid at room temperature.
True
False
An alloy is a mixture of at least two metals.
True
False
An essential property of the material used for making aerials is conductivity, so to achieve it, they had to make the material liquid.
True
False
The new aerial can be covered by another elastic material.
True
False
In order to tune a conventional aerial, you need to change the length of the aerial to make it correspond with the wavelength of the incoming radio wave. This involves cutting the rod so that its length matches the vibration of the wave that is coming in.
True
False
The invented aerial is tuned to the correct frequency by stretching or squeezing it.
True
False
What do aerials use to transmit signals? - An ___________ electrical current.