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单选题
With reference to an axial piston pump, which one of the following statements is true?（）
A
The cylindrical barrel is coupled to the motor
B
The cylindrical barrel has an odd number of bores
C
The bores end in sockets
D
The sockets fit in the swash plate
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更多 “单选题With reference to an axial piston pump, which one of the following statements is true?（）A The cylindrical barrel is coupled to the motorB The cylindrical barrel has an odd number of boresC The bores end in socketsD The sockets fit in the swash plate” 相关考题
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The delivery rate of an axial piston hydraulic pump is controlled by varying the position of theA.tilting boxB.slide blockC.pintleD.reaction ring
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The usual number of single-acting pistons used in a variable stroke axial-piston pump isA.3 or 5B.5 or 7C.7 or 9D.9 or 11
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Given that Thing is a class， how many objects and reference variables are created by the following code？（） Thing item， stuff； item = new Thing（）； Thing entity = new Thing（）；A、One object is createdB、Two objects are createdC、Three objects are createdD、One reference variable is createdE、Two reference variables are createdF、Three reference variables are created.
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discharges into a gradually widening channelB
has stationary diffuser vanesC
produces no kinetic energyD
All of the above are true
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providing the impeller with balancing holesB
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paint peeling off the uptakeB
no operation procedures for the oil separatorsC
one of ship’s certificates required is invalidD
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broken raw water pump shaftD
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单选题If a diesel engine has been stopped because of piston seizure due to severe overheating, the crankcase（）A
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单选题When the tilting box of a variable stroke axial-piston pump is perpendicular to the pump shaft, which of the following conditions will exist?（）A
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考题
单选题Which one of the followings might not be employed to create vacuum for flash type evaporator? （）A
high-pressure steam-driven air-ejectorB
motor-driven vacuum pumpC
water-motivated air eductorD
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考题
单选题The delivery rate of a variable stroke axial piston hydraulic pump is controlled by varying the position of the （）.A
slide blockB
tilting boxC
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考题
单选题Which of the following statements is/are true regarding hydraulic pumps in general? （）A
Variable volumes can be obtained with gear pumps only by variation of the pump drive speedB
A radial piston pump houses sliding pistons in a stationary cylinder block through which passes a rotating pintle or ported shaftC
The amount of fluid displaced per revolution of an axial piston rotary pump is dependent on the angle formed between the cylinder block and valve plateD
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考题
单选题The delivery rate of an axial-piston hydraulic pump is controlled by varying the position of the （）.A
sliding blockB
pintleC
reaction ringD
tilting box or swash plate
考题
单选题An axial piston, variable stroke pump is used in a vessels hydraulic steering gearUnder pressure, oil continually leaks out from between the valve plate/cylinder barrel and will（）.A
cause loss of hydraulic oil from the systemB
result in extreme damage to the pumpC
cause damage to the pump ff not continually drained from the pump casingD
result in the system high side pressure to substantially drop off
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单选题An axial轴向 piston pump differs from a radial piston pump as the pistons of an axial piston pump are positioned （）.A
radially from the shaftB
parallel to each other and to the shaftC
parallel to each other but at a right angle to the shaftD
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central valveB
radial plungerC
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单选题With reference to a radial piston pump, which one of the following statements is false?（）A
Surrounding the fixed shaft is a hollow shaftB
This hollow shaft carries radial boresC
Each bore is fitted with a well-lapped plungerD
There are always even numbers of bores
考题
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one fixed power pump and one portable hand pumpB
one fixed hand pump and one portable hand pumpC
two portable hand pumpsD
either A or B
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单选题With reference to operating a four-ram steering gear system under emergency conditions, which one of the following statements is incorrect?（）A
Only one pump should be used at any timeB
The ship speed should be reduced to 70% of the normalC
Watch keeping of the steering gear should be increasedD
Limitations of the steering gear should be logged but the bridge need not be informed
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单选题Which harmful consequence may be the result of lube oil sludge accumulation? （）A
Clogged oil pump suction screensB
Increased oil operating temperaturesC
Sticking piston ringsD
All of the above
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split pinsB
crankpinsC
dipsticksD
circlips
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单选题The usual number of single-acting pistons used in a variable stroke axial-piston pump is （）.A
3 or 5B
5 or 7C
7 or 9D
9 or 11
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