最高温升压力是按《气瓶安全监察规程》的规定充装,在允许的()时瓶内介质达到的压力。
A. 最高工作压力;
B. 最大充装量;
C. 最高工作温度;
D. 最低工作温度。
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焊接操作机械主要用于支承焊接件,并使它完成一定的运动,以便使焊接处于有利的焊接位置
A. 正确
B. 错误
What is the purpose of the intake/exhaust valves in a diesel engine? ()
A. They regulate the combustion cycle
B. They supply cooling water
C. They synchronize the ignition spark
D. They supply and regulate the lubricant flow
Two short blasts of the whistle have all of the following meanings except().
A. I intend to meet you starboard to starboard
B. I do not intend to hold course and speed
C. I intend to overtake you on your port side
D. I intend to alter my course to port