【单选题】Which general weather conditions should you expect to find in a low pressure system?
B.
Scattered clouds at high elevations
C.
Precipitation and cloudiness
D.
Gradual clearing and cooler temperature
【判断题】橡胶垫板压溃或变形,两侧压宽合计:厚度为10mm的橡胶垫板超过20mm应进行更换。
【单选题】You are underway in heavy fog. You hear the fog signal of a vessel which is somewhere ahead of your vessel. You must ______
A.
slow to moderate speed and navigate with caution
B.
maintain speed and sound the danger signal
C.
stop engines and navigate with caution
D.
slow to bare steerageway and navigate with caution
【单选题】橡胶垫板压溃或变形,两侧压宽合计:厚度为7mm的橡胶垫板超过(),厚度为10mm的橡胶垫板超过(),应进行更换。
【简答题】钢轨接头两端各两根轨枕应铺设高弹性橡胶垫板。橡胶垫板压溃或变形(两侧压宽合计:厚度为7mm的橡胶垫板超过15mm,厚度为10mm的橡胶垫板超过20mm)丧失作用,橡胶垫片损坏时,应进行更换。()
【判断题】橡胶垫板压溃或变形,两侧压宽合计:厚度为7mm的橡胶垫板超过10mm,应进行更换。
【判断题】整流变压器的主要参量主要有:整流变压器次级伏安数、阻抗压降百分数、变压器的空载电流。