检修时当套管水平存放，安装就位后，带电前必须进行静放，静放时间要求为（）
A. 500kV套管静放时间应大于36小时
B. 500kV套管静放时间应大于72小时
C. 110～220kV套管静放时间应大于24小时
D. 110～220kV套管静放时间应大于48小时
Which of the following statements is correct regarding a turbocharged four-stroke/cycle diesel generator?（）
At zero load the intake manifold pressure is greater than the exhaust manifold pressure
B. At full load the intake manifold pressure and exhaust manifold pressure are equal
C. At full load the intake manifold pressure is less than the exhaust manifold pressure
D. At full load the intake manifold pressure is greater than the exhaust manifold pressure
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