Which of the following statements represents the reason for rolling over a diesel engine with the cylinder indicator cocks open prior?（）<br>A:To test the starting system<br>B:To remove air bubbles from the jacket water<br>C:To ensure that the lube oil system delivers pressure<br>D:To ensure foreign material (water etc) is not present in the cylinders

Which of the following statements represents the reason for rolling over a diesel engine with the cylinder indicator cocks open prior?（）
A:To test the starting system
B:To remove air bubbles from the jacket water
C:To ensure that the lube oil system delivers pressure
D:To ensure foreign material (water etc) is not present in the cylinders

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