1. [单选题]自由降落式救生艇(boat)艇员登艇后，应面向（）。
A. 艇首
B. 艇尾
C. 艇舷侧
2. [单选题]下列( )情况不属于互见。Ⅰ.-船能自他船以视觉看到时;
A. Ⅱ.雾中两船距离很近但一船只能见到他船影子，看不清轮廓;
B. Ⅲ.雾中两船相互以视觉看到时。
C. Ⅰ
D. Ⅱ
E. Ⅰ、Ⅲ
F. Ⅰ～Ⅲ
3. [单选题]制冷剂在冷凝器中放热时基本不变的是( )。
A. 温度
B. 压力
C. 相态
D. 焓值
4. [单选题]船舶低压管路可采用非金属材料(nonmetallic material)中的( )来替代金属材料。
A. ABS塑牡
B. 硬质聚氯乙烯塑料
C. 环氧树脂
D. ABS塑牡或硬质聚氯乙烯塑料
5. [单选题]Which of the following is NOT a recommended safe practice?
A. Securing equipment against slipping or drifting
B. Operating machinery at its recommended speed
C. Repairing loose handles on tools before using
D. Using tools for purposes for which they are not designed
