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【单选题】
关于冷风侵入耗热量，下列叙述错误的是( )。A.
冷风侵入耗热量等于外门基本耗热量乘以外门附加率
B.
外门附加率修正，只适用于短时间开启的，无热空气幕的外门
C.
建筑物的阳台门不必考虑冷风侵入耗热量
D.
由于一道门的外门附加率65%n小于两道门(有门斗)的外门附加率80%n(n为建筑物的楼层数)，所以两道门(有门斗)的冷风侵入耗热量大于一道门的冷风侵入耗热量
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举一反三
【单选题】The crank-pin bearings are made of___
A.
alloy steel
B.
resistance heat steel
C.
cast steel
D.
cast iron
【简答题】曲柄销 crank pin
【单选题】Excessive clearances in the main or crank-pin bearings will sometimes be indicated by _____ before any bearing knock is heard.
A.
loss of flow in the fuel system
B.
loss of pressure in the air system
C.
loss of flow in the lubricating system
D.
loss of pressure in the lubricating system
【单选题】- It’s been a wonderful day.- Yes, fantastic. We’ve had no______with anything. Everything’s been perfect.
A.
obstacles
B.
questions
C.
harriers
D.
problems
【单选题】The crank pin journal is provided with large bores for _____.
A.
lubrication
B.
cooling
C.
balancing purpose
D.
ventilation
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