What should you avoid when using an independent endurance brake (retarder) on slippery roads?

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Incorrect!

What should you avoid when using an independent endurance brake (retarder) on slippery roads?

The front wheels spinning

You selected this answer

The drive wheels locking

Correct answer

Brake-pad wear

Anti-skid road surfaces

DVSA theory test explanation

The endurance brake (retarder) usually operates by applying resistance, via the transmission, to the vehicle's driven wheels. If the road is slippery, the tyres may lose grip and the wheels will lock.

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