900mm
600mm
760mm
450mm
第1题：
A negative metacentric height ______.
A.should always be immediately corrected
B.will always cause a vessel to capsize
C.always results from off-center weights
D.All of the above are correct
第2题：
The purpose of the "set" hand on an aneroid barometer is to ______.
A.adjust the barometer
B.indicate any change in the reading of the barometer
C.provide a correction for height above sea level
D.provide a correction for temperature changes
第3题：
A. been exposed to
B. exposed to
C. been exposed on
D. exposed on
第4题：
Metacentric height is a measure of ______.
A.initial stability only
B.stability through all angles
C.maximum righting arm
D.All of the above
第5题：
What does “evel-luffing” accomplish during crane operations ________．
A.It prevents the load from swinging when the boom level is adjusted
B.Less power is needed when topping the boom with a load on the hook
C.It maintains the height of the load above the deck
D.All of the above
第6题：
The error in the measurement of the altitude of a celestial body，caused by refraction，increases as the ______.
A.horizontal parallax decreases
B.observer's height above sea level increases
C.humidity of the atmosphere decreases
D.altitude of the body decreases
第7题：
Normal pool elevation is the height in feet of the section of river above a dam. This height is measured from ______.
A.low steel on the Huey P. Long Bridge
B.mean sea level
C.the local water table
D.the minimum dam control level
第8题：
A. Half Height, Universally Keyed PCI card
B. Full Height, 3.3v PCI-X card
C. Half Height, x16 PCI Express Card
D. Half Height, 3.3v PCI card
E. Half Height, Universally Keyed PCI-X card
F. Full Height, Universally Keyed PCI card
G. Half Height, x8 PCI Express Card
第9题：
For a floating vessel, the result of subtracting KG from KM is the ______.
A.height of the metacenter
B.height of the righting arm
C.height of the center of buoyancy
D.metacentric height
第10题：
过渡高度以上可供使用的最低飞行高度层。（）