Why are baffle plates fitted to tankers carrying liquids?

Possible Answers:

a. To reduce wind resistance

b. To reduce the wave effect

c. To stop the brakes from locking

d. To make the steering lighter

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Which type of digital tachograph card is used by an approved calibration centre when they're recalibrating the tachograph?

Possible Answers:

a. Control card

b. Company card

c. Driver card

d. Workshop card

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