In frosty weather, what precaution could a lorry driver take to prevent moisture from freezing in the air-brake system? In frosty weather, what precaution could a lorry driver take to prevent moisture from freezing in the air-brake system?

• Possible answers:

   
• A. Drain the air tanks daily
• B. Cover the air tanks with a blanket
• C. Keep the engine at high revs when starting
• D. Pump the brakes