Your lorry has been fitted with wind deflectors. How will they affect your vehicle?

Possible Answers:

a. They'll increase the fuel consumption

b. They'll reduce the stability

c. They'll require increased tyre pressures

d. They'll reduce the wind resistance

Think you know the answer to this theory test question?

Crown copyright material is reproduced under licence from the Driver and Vehicle Standards Agency, which does not accept any responsibility for the accuracy of the reproduction. The Driver and Vehicle Standards Agency does not endorse in any way any advertisement displayed on this website.