Incorrect!

You're riding a motorcycle that has an engine of less than 50 cc. What should you do if you see a queue of traffic building up behind?

Keep well out to stop vehicles overtaking dangerously
Wave vehicles behind you to pass if you think they can overtake
You selected this answer
Pull in when you can to let faster vehicles behind you overtake
Correct answer
Give a left signal when it's safe for vehicles to overtake you

DVSA theory test explanation

Try not to hold up a queue of traffic. This might lead to other road users becoming impatient and attempting dangerous manoeuvres. If you're riding a slow-moving moped or small motorcycle and a queue of traffic has built up behind you, look for a safe place to pull in so they can pass safely.