Diesel engine cylinder head test cocks are used to_____.A.check cylinder lubrication prior

Diesel engine cylinder head test cocks are used to_____.

A.check cylinder lubrication prior to starting engine

B.connect exhaust gas analyzers to determine engine efficiency

C.pressure test cylinder heads to check for leaks

D.remove moisture accumulations from cylinder prior to starting

请帮忙给出正确答案和分析，谢谢！