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Correct!

You have to drive onto a muddy building site. Why should you switch on your diff-lock?

To make your steering lighter
To improve your fuel consumption
To increase your engine power
To make the wheels less likely to spin
Correct answer

DVSA theory test explanation

Engaging the diff-lock means that the driven wheels are locked together. This reduces the likelihood of wheel spin. Remember to switch off the diff-lock as soon as you're on firm ground again, otherwise you could damage the transmission.

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