
【名词&注释】
单向阀(check valve)、截止阀(stop valve)、锅炉给水泵、鼓风机(blower)、惰性气体系统(inert gas system)
[单选题]如果惰性气体系统(inert gas system)鼓风机将用于排气,则其空气进口应安装在____。
A. 截止阀
B. 盲断装置
C. 单向阀
D. 锁紧装置
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举一反三:
[单选题]根据经验,海上航行的一般货船,其横摇周期一般不应小于( )s。
A. 5
B. 9
C. 18
D. 20
[单选题]Which of the following statements represents the function of the compression rings installed at the top of a diesel Engine piston?
A. Control the amount of lube oil burned in the combustion chamber
B. Transmit heat from the piston to the cylinder liner
C. Prevent damage to ring groove inserts by acting as a heat dam
D. Dissipate combustion chamber gas pressure by channeling it through the ring gap
[单选题]锅炉汽压为0.5MPa(≈51m水柱高),其中水位距热水井液面高为2m,锅炉给水泵的管路阻力以泵静扬程10%计,其工作扬程约为( )。
A. 2m
B. 51m
C. 53m
D. 58.3m
[单选题]闪燃是指发生短暂的闪火现象,通常其闪火时间少于______。
A. 15秒
B. 10秒
C. 5秒
D. 8秒
[单选题]_________ spanner is this?
A. What
B. How
C. Whose
D. Who
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