单项选择题
In more recent years, （） heat exchangers have frequently been employed for jacket water and oil cooling.
A.shell and tube type
B.plate type
C.coil type
D.conical disc type
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相关考题
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单项选择题
To avoid impingement attack, care must be taken with the water （） through the tubes of the heat exchangers.
A.temperature
B.velocity
C.density
D.viscosity -
单项选择题
A non-return valve in the air delivery line near to the compressor must be （）type similar to the compressor discharge valve.
A.the low inertia
B.the high inertia
C.the low velocity
D.the high velocity -
单项选择题
A （） in the air delivery line near to each compressor is essential.
A.butterfly valve
B.globe valve
C.gate valve
D.non-return valve
