网友您好， 请在下方输入框内输入要搜索的题目：
题目内容
（请给出正确答案）
单选题
Attempts are made to eliminate axial thrust in centrifugal pump by （）.
A
providing the impeller with balancing holes
B
the use of symmetrical impeller
C
neither A nor B
D
either A or B
参考答案
参考解析
解析：
暂无解析
更多 “单选题Attempts are made to eliminate axial thrust in centrifugal pump by （）.A providing the impeller with balancing holesB the use of symmetrical impellerC neither A nor BD either A or B” 相关考题
考题
Churchill Ice Cream has to date made two unsuccessful attempts to become an international company.(d) What reasons would you suggest to explain this failure of Churchill Ice Cream to become an internationalcompany? (5 marks)
考题
首推全速向左！A.Bow stern full to port!B.Bow thrust half to port!C.Bow thrust full to starboard !D.Bow thrust full to port!
考题
A thrust bearing is used with a propulsion diesel engine to ____.A.control axial movement of the crankshaftB.transmit engine thrust to the propeller shaftC.absorb vibrations in the propeller shaftingD.prevent propeller thrust from being transmitted to the hull
考题
The Merchant undertakes that no claim or _______ shall be made against any servant，agent or subcontractor of the Carrier which imposes or attempts to impose upon any of them or any vessel owned by any of them any liability whatsoever in connection with the goods．A.conditionB.determinationC.allegationD.engagement
考题
At the middle pressure and large air quantity,_________ is more suitable.A.an axial flow fanB.a radial flow blowerC.a centrifugal fanD.an auxiliary blower
考题
单选题The text suggests which of the following about air pollution?A
Further attempts to reduce emissions from gasoline-fueled vehicles will not help lower urban air-pollution levels.B
Attempts to reduce the pollutants that an individual gasoline-fueled vehicle emits have been largely unsuccessful.C
Few serious attempts have been made to reduce the amount of pollutants emitted by gasoline-fueled vehicles.D
Pollutants emitted by gasoline-fueled vehicles are not the most critical source of urban air pollution.
考题
单选题What is the function of the thrust bearing?（）A
Prevents lateral movement of the slow speed gearB
Transmits propeller thrust to the hullC
Keeps spring bearings in lineD
Prevents main reduction gear axial movement
考题
单选题For a propeller direct driven by the engine,（）.A
the thrust pads are while metal faced on both sidesB
the thrust pads are while metal faced only on the forward sideC
the thrust pads are while metal faced only on the after sideD
intermediate shaft usually supported by a plummer block
考题
单选题The function of a centrifugal pump double volute casing is to （）.A
reduce radial thrust to the impellerB
double the liquid velocity through the pump when compared to a single voluteC
reduce hydraulic end thrustD
provide the effect of multi-staging
考题
单选题A variable displacement system of hydraulic drives consists of （）.A
a variable displacement axial piston pumpB
a constant displacement axial piston pumpC
a reciprocating piston pumpD
a centrifugal pump
考题
单选题A thrust bearing is used with a propulsion diesel engine to （）.A
control axial movement of the crankshaftB
transmit engine thrust to the propeller shaftC
absorb vibrations in the propeller shaftingD
prevent propeller thrust from being transmitted to the hul
考题
单选题A thrust block is designed to（）.A
transmit the thrust of the engine to the propellerB
transmit the thrust of the propeller to the vesselC
absorb the shock of wave pressure at the bowD
be placed between the engines and the foundation to absorb the vibration
考题
单选题Under centrifugal pumps are the volute, diffuser, mixed-flow, axial flow and （） or regenerative types.A
reciprocatingB
hydraulicC
turbineD
vane
考题
单选题首推全速向右！（）A
Bow stern full to port!B
Bow stern half to port!C
Bow thrust full to starboard !D
Bow thrust full to port!
考题
单选题首推全速向左！（）A
Bow stern full to port!B
Bow thrust half to port!C
Bow thrust full to starboard !D
Bow thrust full to port!
考题
单选题On a large diesel engine installation, crankshaft axial alignment is maintained by the （）A
piston rod guidesB
engine thrust bearingC
crosshead bearingD
main shaft flexible coupling
考题
单选题The order “Bow thrust stop” means “（）”.A
Bow thrust full to pertB
Bow thrust full to starboardC
No bow thrust revolutionsD
No stern thrust revolutions
考题
单选题首推半速向右！（）A
Bow stern full to port!B
Bow stern half to port!C
Bow thrust half to starboard !D
Bow thrust full to port!
考题
单选题The merchant undertakes that no claim or allegation shall be made against any servant，agent or subcontractor of the carrier which（）to impose upon any of them or any liability whatsoever in connection with the goods.A
supplies or attempts to supplyB
imposes or attemptsC
complies or attempts to complyD
provides or attempts to provide
热门标签
最新试卷
