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In order to withstand fluid head pressure on a ship，stiffeners are often attached to the bulkhead ______.
A.penetrations
B.plating
C.framing
D.brackets
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Doing exercise regularly can help you to withstand pressure.A:solve
B:bear
C:suffer
D:surrender
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甲板部由大副负责。（）A、The captain is the head of a ship.B、The master is the head of a ship.C、The deck department is under the command of the chief officer.D、The pilot is the head of a ship.
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The compressed airB
The compressing airC
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The head tank
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单选题In order to withstand fluid head pressure on a ship，stiffeners are often attached to the bulkhead（）.A
penetrationsB
platingC
framingD
brackets
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molecular fluid vibrationB
energy lossesC
wide pressure variationsD
mechanical damage to control valves
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单选题A centrifugal bilge pump requires priming （）.A
primarily to lubricate the shaft sealsB
due to the inability of this type of pump to lift water to cover the suction (eye) of the impellerC
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in order to overcome the potential energy of water in the discharge line
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a pressure reducing valveB
a pilot valveC
an operating pistonD
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单选题Which of the following statements about pump operations is NOT a correct statement?（）A
In order for a fluid to be pumped, a fluid must be made to flowB
A substance must be cold in order for it to be pumpedC
The kinetic energy imparted by the pump can be used to force a liquid through a hydraulic systemD
A pump must receive its energy from an external source
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单选题A hydraulic accumulator aboard a ship is designed to（）.A
store fluid under pressureB
act as a fluid reservoirC
provide overpressure reliefD
replenish fluid to a system
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单选题The cast iron（）for the cross-head are attached to the top section and seal off the crankcase.A
cylinder coverB
cross-head shoesC
guide-waysD
scavenging boxes
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单选题When the ship is in restricted visibility, the officer in charge of the engineering watch shall ensure that （） Ⅰ.Bridge order relating to changes in speed or direction of operation areimmediately implemented Ⅱ.auxiliary machinery used for maneuvering is readily available Ⅲ.permanent air or steam pressure is available for sound signalsA
Ⅰ+ⅡB
Ⅰ+ⅢC
Ⅱ+ⅢD
Ⅰ+Ⅱ+Ⅲ
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单选题Overflow valve is used to （）A
control the fluid flow through itB
prevent the pressure before it over the specified valveC
make the pressure after it steadyD
control the direction of oil flow
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单选题甲板部由大副负责。（）A
The captain is the head of a ship.B
The master is the head of a ship.C
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The pilot is the head of a ship.
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DifferentialB
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BarrelD
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throttling the pressure lineB
changing the speed of the rotorC
either A or BD
None of the above is true
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compensate for major leaks in the systemB
maintain the original fluid viscosityC
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assure constant fluid temperature
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单选题The pressure head of a pump is given in the unit of （）.A
kgB
MPaC
meter fluid columnD
None of the above is true
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mechanical energyB
heat energyC
potential energyD
kinetic head
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