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
Before doing any work on a hydraulic system equipped with accumulators, you should（）
A
drain the accumulators and purge with oxygen
B
bleed off all stored energy from the accumulators completely
C
charge the accumulators to prevent system energy loss
D
pump the hydraulic fluid into the accumulators to prevent fluid loss
参考答案
参考解析
解析：
暂无解析
更多 “单选题Before doing any work on a hydraulic system equipped with accumulators, you should（）A drain the accumulators and purge with oxygenB bleed off all stored energy from the accumulators completelyC charge the accumulators to prevent system energy lossD pump the hydraulic fluid into the accumulators to prevent fluid loss” 相关考题
考题
If you install a new hydraulic hose in a hydraulic system, the hose must be long enough to allow for contraction to preventA.failure of the hydraulic hoseB.excessive flow through the lineC.friction in other areas of the hydraulic systemD.overheating of the hydraulic fluid
考题
When the prime movers of two paralleled generators are equipped with mechanical-hydraulic governors, and are operating within their designed range, the unit with the least amount of speed droop will .A.pick up more of any increase in loadB.pick up less of any increase in loadC.share an equal amount of any increase in loadD.drop an equal amount of any decrease in load
考题
Before doing any work on a hydraulic system equipped with accumulators, you shouldA.drain the accumulators and purge with oxygenB.bleed off all stored energy from the accumulators completelyC.charge the accumulators to prevent system energy lossD.pump the hydraulic fluid into the accumulators to prevent fluid loss
考题
After installing a new hydraulic pump in a system, what special attention should be given to the hydraulic system?A.The relief valves in the system should be readjustedB.The filters and strainers should be checked frequentlyC.All system pressure should be readjustedD.The system should be drained and renewed with a fluid of different operating characteristics
考题
Before performing any maintenance on a hydraulic system storing energy in an accumulator, you shouldA.pressurize the system to test for leaksB.bleed off all pressure within the systemC.operate the machine until it reaches normal temperatureD.disconnect the pump pressure control switch
考题
Which of the following can be used in hydraulic transmission system?A.Hydraulic oilB.Animal oilC.Light oilD.Fuel oil
考题
In the history of any language the writing system always came into being before the spoken form.A对B错
考题
In the history of any language the writing system always came into being before the spoken form.
考题
A customer has a POWER6 520 system with 6 partitions. They plan to upgrade their system and need to determine the current hardware configuration of the partitions before making any upgrade decisions. What is needed to read the exported system plan and design the new system?（）A、e-ConfigB、System Planning Tool (SPT)C、IBM Workload Estimator (WLE)D、IBM Performance Monitor (PM)
考题
A system has users doing interactive work while background jobs are running. Interactive users are requesting that system response time be improved for foreground processes. Which tuning parameters should be changed to accomplish this？（）A、 schedtune -hB、 schedtune -rC、 vmtune -fD、 schedtune -w
考题
You work as a database administrator for Certkiller .com. In the Certkiller PRODUCTION database you have granted RESUMABLE system privilege to the CONNECT role.Resumablespace operation has been enabled for all user session. You want users NOT to be aware of any kind of space-related problems while performing transactions. Instead， you want the problem to be resolved by a database trigger automatically. Which combination of triggering time and event would you use to achieve this objective？（）A、AFTER CREATEB、AFTER SUSPENDC、BEFORE CREATED、AFTER TRUNCATEE、BEFORE SUSPENDF、AFTER INSERT OR DELETE OR DELETEG、BEFORE INSERT OR DELETE OR DELETE
考题
单选题A system has users doing interactive work while background jobs are running. Interactive users are requesting that system response time be improved for foreground processes. Which tuning parameters should be changed to accomplish this？（）A
schedtune -hB
schedtune -rC
vmtune -fD
schedtune -w
考题
单选题Which of the following hydraulic systems is not one of the three sub-division of the Hydraulic drive system?（）A
Constant pressure systemB
Variable pressure systemC
Variable displacement systemD
Constant volume system
考题
单选题After installing a new hydraulic pump in a system, what special attention should be given to the hydraulic system?（）A
The relief valves in the system should be readjustedB
The filters and strainers should be checked frequentlyC
All system pressure should be readjustedD
The system should be drained and renewed with a fluid of different operating characteristics
考题
单选题She had clearly no（）of doing any work, although she was very well paid.A
tendencyB
ambitionC
intentionD
willingness
考题
单选题（） clearances in the main or crank pin bearings will sometimes be indicated by loss of pressure in the lubricating system before any bearing knock is heard.A
Too largerB
Too smallerC
ExcessD
Excessive
考题
单选题When the prime movers of two paralleled generators are equipped with mechanical- hydraulic governors, and are operating within their designed range, the unit with the least amount of speed droop will （）.A
pick up more of any increase in loadB
pick up less of any increase in loadC
share an equal amount of any increase in loadD
drop an equal amount of any decrease in load
考题
单选题Hydraulic cranes must be properly warmed-up before being operated because （）.A
warm-up allows the hydraulic system to become charged with oilB
warm-up allows the relief valves to be properly testedC
hydraulic strainers operate only during the warm-up periodD
hydraulic fluid must be at the proper viscosity
考题
单选题In an electro-hydraulic steering gear system, when will the variable displacement pump be placed on stroke?（）A
When the helm is at any angle other than amidshipsB
When the six-way valve is openedC
When the ram relief valves liftD
When the redder angle is different from the position of the helm
考题
单选题How can the chance of contaminating hydraulic fluid be decreased when working on hydraulic system?（）A
clean the fittings before they are disconnectedB
Place drip pans under leaky fittingsC
Seal any cracks in lines with PermatexD
Coat all threads with graphite oil
考题
单选题On a diesel engine equipped with a hydraulic speed control governor, hunting in many cases can be corrected by adjusting the （）A
accumulator spring compressorB
balance pistonC
compensating needle valveD
proportional piston
考题
单选题In an elector-hydraulic steering system, rudder shock is limited by（）A
a differential gearB
return springsC
a hydraulic accumulatorD
relief valves
考题
单选题The energy consumed by an AC motor, as strictly reactive power, is （）A
used to do mechanical workB
used to establish the magnetic field of the motorC
lost as heat generated by the windingsD
lost in doing work to turn the motor itself
考题
单选题When retrieving the survival craft，the winch operator should stop the winch and check（）.A
that all personnel are seated in the craftB
that the cable has not jumped any grooves on the drumC
which way the wind is blowingD
the hydraulic fluid level before lifting
考题
单选题If the broker’s lien of the bill of lading for his charges in respect of goods is not satisfied before the goods have reached their destination，he may have the goods（）home in order to retain his lien on them，and is not liable to any action for so doing.A
deliveredB
providedC
broughtD
become
考题
判断题In the history of any language the writing system always came into being before the spoken form.A
对B
错
热门标签
最新试卷