Which of the following statements is c

Which of the following statements is correct for the design and installation of diesel engine cooling water systems?（）

AAn alarm device with audible and visible signals is required for all cooling water systems
BPropulsion engines with bores over 200 mm are to be fitted with cooling water jackets
CEach totally enclosed cooling system shall be provided with a suitable head tank
DDrain cocks are to be provided at the lowest points of all cylinder water jacket

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