As for a hydraulic vane pump, which of the following is in contact with the vanes during working: （） (1)the rotor (2)the pump shaft (3)the external surface of the housing

相似题目

• If you are given the job of adding hydraulic fluid to a mooring winch, and are not certain as to the type of fluid to use, you should （）.

  A . add fluid that is the same color as the fluid in the reservoir B . add turbine oil because it is always a good substitute C . add any oil that has the same viscosity as the hydraulic fluid D . check the winch manufacturers instruction book

  查看最佳答案

• As the temperature for a given mass of air increases，the（）.

  A . dew point increases B . dew point decreases C . relative humidity increases D . relative humidity decrease

  查看最佳答案

• When a hydraulic vane pump is working, which of the following is in contact with the vanes?（） (1) the rotor (2) the internal surface of the housing (3) the external surface of the housing

  A . (1) only B . (2) only C . (1) and (2) D . (1), (2) and (3)

  查看最佳答案

• As for a hydraulic single action vane pump, the inner wall of the stator is usually of （） shape.

  A . circular B . elliptical C . rectangular D . hexago

  查看最佳答案

• A bonding cable should be connected for cargo operations aboards a tank vessel as soon as the（）.

  A . cargo has been loaded or discharged B . cargo ghose is connected C . cargo pumps are started D . vessel is ready to handle cargo

  查看最佳答案

• （）are used for distress alerting as a rule.

  A . SES/DSC/EPIRB B . SART/radiotelephone C . COSPAS-SARSAT D . both B and C

  查看最佳答案

• I would be very much（）if you could arrange for a radio technician to come on board as soon as possible for my radar repair.

  A . obliged B . obliging C . oblige D . being obliged

  查看最佳答案

• The gear, screw, and vane pumps are all classified as （）.

  A . variable stroke pumps B . multistage pumps C . positive displacement pumps D . triple-ported pum

  查看最佳答案

• In the design of hydraulic piping and equipment consideration is given to minimize turbulence in the hydraulic fluid, as this will cause （）.

  A . molecular fluid vibration B . energy losses C . wide pressure variations D . mechanical damage to control valve

  查看最佳答案

• As the temperature for a given mass of air increase, the（）.

  A . dew point increase B . dew point decreases C . relative humidity increases D . relative humidity decrease

  查看最佳答案

• Which are valid modes for a switch port used as a VLAN trunk?（）

  A . transparent B . auto C . on D . desirable E . blocking F . forwarding

  查看最佳答案

• If the pump for a hydraulic anchor windlass is overheating, the cause may be （）.

  A . excessive drive motor speed B . excessive pump discharge pressure C . too low of a tilting box angle D . insufficient drive motor speed

  查看最佳答案

• As a adult ,you should be _for you behavior.

  查看最佳答案

• In other words, a college education is more and more seen as a means for economic betterment（ ） means for human betterment.

  查看最佳答案

• I have great for her as a writer.

  查看最佳答案

• A tiring "adolescent usually takes caffeinated drinks as a compensation for sleep loss.

  查看最佳答案

• Nowadays, there have been many arguments against the interview as a selection procedure for future partner. As a result, Internet love is very popular among young people as a means to hunt for an ideal husband or wife. What is your opinion？

  Write an essay of about 400 words on the following topic: 1. INTERNET LOVE In the first part of your essay yon should state clearly your main argument, and in the second part you should support your argument with appropriate details. In the last part you should bring what you have written to a natural conclusion or make a summary. Marks will be awarded for content, organization, grammar and appropriateness. Failure to follow the above instructions may result in a loss of marks. Write your essay on ANSWER SHEET FOUR

  查看最佳答案

• 执行下列程序后，变量a的值为（)Dim i As IntegerDim a As Integera=0For i＝l To 100 Step 2a=a+lN

  执行下列程序后，变量a的值为 () Dim i As Integer Dim a As Integer a=0 For i＝l To 100 Step 2 a=a+l Next i A．1 B．10 C．50 D．100

  查看最佳答案

• 设有如下通用过程：Public Sub Fun（a（)As Integer,x As Integer) For i=1 To 5 x=x+a（i) Next

  设有如下通用过程： Public Sub Fun(a()As Integer,x As Integer) For i=1 To 5 x=x+a(i) Next End Sub 在窗体上绘制一个名称为Text1的文本框和一个名称为Command1的命令按钮。然后编写如下的事件过程： Private Sub Command1_Click() Dim arr(5) As Integer,n AsInteger For i=1 To 5 arr(i)=i+i Next Fun arr,n Text1.Text=Str(n) End Sub 程序运行后，单击命令按钮，则在文本框中显示的内容是()。 A．30 B．25 C．20 D．15

  查看最佳答案

• What is NOT mentioned as a benefit for family members？

  A．A personal training session B．A voucher that can be used at a local store C．Free classes for a month D．Access to a swimming pool

  查看最佳答案

• From the passage we can infer that Pu's father is portrayed as a______.

  A．demonstrative and caring parent B．reserved and reticent man C．compassionate and sentimental spouse D．spontaneous and dynamic minister

  查看最佳答案

• When the relief valve is used as a constant pressure valve, it is connected to the outlet of the hydraulic pump to ensure that the outlet pressure of the hydraulic system (pump) is constant.

  A:正确; B:错误

  查看最佳答案

• As a young man, he has a strong____ for success（）

  A．honor B．desire C．secret D．church

  查看最佳答案

• 执行下列程序后，变量a的值为（)。 Dim i As Integer Dim a As Integer a=0 For i=1 To 100 Step 2 a=a+1 Next i

  A．1 B．10 C．50 D．100

  查看最佳答案