单项选择题
A.There is apparent condensate in piping
B.The steam is not discovered after admitting steam
C.The condensate should be fully loaded in the piping as admitting steam
D.The condensate should be fully drained from the piping while admitting steam
单项选择题 It is usual to identify the fluids in pipes by bands of paint at intervals, and the engineer should familiarize himself with the code in use.According to the above sentence, which of the following statements is true?（）
单项选择题 Disastrous explosions have been caused by accumulations of oil or oil vapour in air lines not drainedAccording to the above sentence, which of the following statements is true?（）
单项选择题 In usual marine applications, bellows joints are designed and fitted to accommodate straight line axial movement only and the associated piping requires adequate anchors and guides to prevent misalignmentAccording to the above sentence, which of the following statements is true?（）