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 BridgeB.mean sea levelC.the local water tableD.the minimum dam control level
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
相关考题：
In the following statements about the principle of the low level controlling, which is WRONG? 0 A.Low level is monitored on the drain tank and header tank.B.If there is high differential the filters pressure across the circulatingpumps is alarmedC.The lubricating oil purifier cannot take oil from the drain tankD.If the sea water pressure falls, this also operates an alarm
The main propulsion diesel engine jacket water temperature rises above normal, with the raw sea suction and the expansion tank water level being normal. Which of the following problems is most likely the cause?A.Faulty thermostatic bypass valveB.Eroded zinc pencils in the heat exchangerC.Steam formation in the expansion tankD.Excessive leakage from jacket water pump seals
Clearance gauges at bridges indicate ______.A.the height of the tideB.depth of water under the bridgeC.charted vertical clearance at mean low waterD.distance from the water to low steel of the bridge
Clearances of bridges and overhead cables below Bonneville Dam refer to heights in feet above mean ______.A.lower low waterB.high waterC.low waterD.sea level
The height of a light is measured from which reference plane?A.Mean low waterB.Mean high waterC.Average water levelD.Geographical sea level
Charted depth is the ______.A.vertical distance from the chart sounding datum to the ocean bottom，plus the height of tideB.vertical distance from the chart sounding datum to the ocean bottomC.average height of water over a specified period of timeD.average height of all low waters at a place
Charted depth is the ______.A.vertical distance from the tidal datum to the ocean bottom plus the height of the tideB.vertical distance from the tidal datum to the ocean bottomC.average height of water over a specified period of timeD.average height of all low waters at a place
The error in the measurement of the altitude of a celestial body，caused by refraction，increases as the ______.A.horizontal parallax decreasesB.observer's height above sea level increasesC.humidity of the atmosphere decreasesD.altitude of the body decreases
What does “evel-luffing” accomplish during crane operations ________．A.It prevents the load from swinging when the boom level is adjustedB.Less power is needed when topping the boom with a load on the hookC.It maintains the height of the load above the deckD.All of the above
Spreading oil on the open sea has the effect of ______．A.Diminishing the height of the seasB.Lengthening the distance between successive crestsC.Increasing the height of the seasD.Preventing the wave crests from breaking
The river water was（ ）from its old course into a new channel where they were building the dam.A.turnedB.switchedC.shiftedD.diverted
过渡高度以上可供使用的最低飞行高度层。（）A、The lowest flight level available for use above the transition altitude.B、The lowest flight layer available for use above the transition height.C、The lowest flight level available for use above the transition height.D、The lowest flight layer available for use above the transition altitude.
从水面到甲板之间的高度称之为干舷。（）A、The height from the bottom of a vessel to the weather deck is called freeboard.B、The depth from water level to the bottom of a vessel is called freeboard.C、The length from the bow to stern of a vessel is called freeboard.D、The height from water level to the main deck is called freeboard.
单选题The height of a light is measured from which reference plane?（）AMean low waterBMean high waterCAverage water levelDGeographical sea level
单选题The error in the measurement of the altitude of a celestial body，caused by refraction，increases as the（）.Ahorizontal parallax decreasesBobserver's height above sea level increasesChumidity of the atmosphere decreasesDaltitude of the body decreases
单选题A mercurial barometer at sea is subject to rapid variations in height (pumping) due to the pitch and roll of the vessel. To avoid this error，measurements of atmospheric pressure at sea are usually measured with a(n)（）.Asyphon barometerBcistern barometerCaneroid barometerDfortin barometer
单选题Normal pool elevation is the height in feet of the section of river above a dam. This height is measured from（）.Alow steel on the Huey P. Long BridgeBmean sea levelCthe local water tableDthe minimum dam control level
单选题The height from water level to the weather deck is called（）.AheightBfreeboardCdraftDwaterline
单选题Clearance gauges at bridges indicate （）.Athe height of the tideBdepth of water under the bridgeCcharted vertical clearance at mean low waterDdistance from the water to low steel of the bridge
单选题Spreading oil on the open sea has the effect of（）.Adiminishing the height of the seasBlengthening the distance between successive crestsCincreasing the height of the seasDpreventing the wave crests from breaking
单选题What does “evel-luffing” accomplish during crane operations（）.AIt prevents the load from swinging when the boom level is adjustedBLess power is needed when topping the boom with a load on the hookCIt maintains the height of the load above the deckDAll of the above
单选题Charted depth is the（）.Avertical distance from the tidal datum to the ocean bottom plus the height of the tideBvertical distance from the tidal datum to the ocean bottomCaverage height of water over a specified period of timeDaverage height of all low waters at a place
单选题Charted depth is the （）.Avertical distance from the chart sounding datum to the ocean bottom，plus the height of tideBvertical distance from the chart sounding datum to the ocean bottomCaverage height of water over a specified period of timeDaverage height of all low waters at a place
单选题从水面到甲板之间的高度称之为干舷。（）AThe height from the bottom of a vessel to the weather deck is called freeboard.BThe depth from water level to the bottom of a vessel is called freeboard.CThe length from the bow to stern of a vessel is called freeboard.DThe height from water level to the main deck is called freeboard.
单选题The main propulsion diesel engine jacket water temperature rises above normal, with the raw water sea suction and the expansion tank water level being normalWhich of the following problems is most likely the cause?（）AFaulty thermostatic bypass valveBEroded zinc pencils in the heat exchangerCSteam formation in the expansion tankDExcessive leakage from jacket water pump seal
单选题You are passing the Bayou Sara gage which reads 3.9 feet. Which of the following statements is TRUE?（）AThe river level is above the Low Water Reference PlaneBRed Store Landing Revetment is ahead on your starboard sideCThis gage reading is at a lower elevation than the same reading on the gage at Head of PassesDNone of the above