Hydraulic Power(Chang’an University)mooc慕课答案2026年版满分测试WYC

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Chapter 8 Examples of Hydraulic Systems test

1、 When the hydraulic transmission system need high pressure,which pump will be selected。（ ）

A:Gear pump
B:Vane pump
C:Piston pump
D:both Piston pump and Vane pump
答案: Piston pump

2、 The area of input port is bigger than the area of out port in external pump,the main reason is （ ）。

A:increasing capacity of oil absorption
B:Releasing the surrounded hydraulic oil
C:Decreasing oil leakage
D:Decreasing the output hydraulic pressure
答案: increasing capacity of oil absorption

3、 The pressure-unloading circuit is used for（ ）。

A:reducing loss of power
B:improving the heat of the system
C:Increasing loss of power
D:reducing the heat of the system
答案: reducing loss of power

4、 The viscosity of hydraulic will （ ）when the temperature is increasing。

A:increase
B:decrease
C:disappear
D:no change
答案: decrease

5、 Based on the combination of the pump with the cylinder or the motor,the constant torque speed-regulating circuit is （ ）。

A:variable delivery pump and the hydraulic cylinder
B:variable delivery pump and the fixed delivery motor
C:the fixed delivery pump and the variable delivery motor
D:the variable delivery pump and the variable delivery motor
答案: variable delivery pump and the fixed delivery motor

6、 According to different installation positions of the throttle valve,the highest efficiency of the circuits is ( ）。

A:inlet throttle speed-regulating circuit
B:outlet speed-regulating circuit
C:bypass throttle speed-regulating circuit
D:the fixed delivery pump and the variable delivery motor
答案: bypass throttle speed-regulating circuit

7、 The （ ）and the fixed pump consist of one-stage pressure regulated circuit。

A:Relief valve
B:Pressure reducing valve
C:Non-return valve
D:Throttle valve
答案: Relief valve

8、 8. The reservoir has function of cooling, storing and ( )。

A:Heating
B:Energy storage
C:Releasing Energy
D:deliverying the hydraulic oil
答案: Heating

9、 （ ）can convert mechanical energy into hydraulic pressure energy。

A:Hydraulic cylinder or motor
B:Hydraulic pumps
C:Hydraulic valves
D:motor
答案: Hydraulic pumps

10、 A differential connection cylinder circuit,the output force of the cylinder is（ ）。

A:
B:
C:
D:
答案:

11、 According to different equipment,different design specifications and design standards must be selected 。

A:正确
B:错误
答案: 正确

12、 We can begin to draft a hydraulic transmission system diagram without the design requirements 。

A:正确
B:错误
答案: 错误

13、 We select the hydraulic components on the sake of economy based on the main parameters。

A:正确
B:错误
答案: 正确

14、 After confirming the hydraulic transmission system,the system efficiency and heat would not need to be estimated。

A:正确
B:错误
答案: 错误

15、 The technical documents include design specification,the working principle of the system and the instructions manual,and so on 。

A:正确
B:错误
答案: 正确

16、 The one advantage of hydraulic transmission system is that the hydraulic oil leakage is inevitable。

A:正确
B:错误
答案: 错误

17、 The fault of the hydraulic transmission system can be easy to find。

A:正确
B:错误
答案: 错误

18、 We classify hydraulic pumps into gear,vane and piston pumps。

A:正确
B:错误
答案: 正确

19、 Vane motor only has the double-acting type and is used for the variable delivery motor。

A:正确
B:错误
答案: 错误

20、 The Accumulator is a device for storage in the hydraulic transmission system 。

A:正确
B:错误
答案: 错误

21、 The approach for the design of a typical hydraulic transmission system is shown as ( )、( )、( )、( )、( )、( ) 。
答案: confirm the design requirements draft a diagram of a hydraulic transmission system calculate the main parameters select the hydraulic components estimate the performance draw working drawing and compose the technical documents

22、 The main parameters of the hydraulic transmission system are ( ) and( )。
答案: P Q

23、 The pressure of the hydraulic transmission system need to be calculated by( )
答案: the load endured

24、 The working drawings include ( )、( ) 、( )and( )。
答案: the hydraulic transmission diagram the hydraulic components layout pump assembly drawing piping assembly drawing

25、 A typical hydraulic transmission system consist of five components such as ( ) 、( )、( )、 ( )、( ) 。
答案: energy component actuator components control components auxiliary components working hydraulic oil

26、 Speed control circuits include( )circuits、( )circuits and( )circuits。
答案: speed-regulating fast-speed movement speed shift

27、 The auxiliary components include ( ) 、( ) 、( ) 、( ) 、( )etc。
答案: accumulators filters reservoirs piping and seal devices pressure gauge

28、 In a hydraulic transmission system typical operating modes include manual operation、( )、( )、( ) and electro-hydraulic operation。
答案: mechanical operation solenoid operation hydraulic operation

29、 The proportional pressure valve consist of ( )and( )。
答案: proportional solenoid pressure valve

30、 The speed-regulating valve is a combination valve consisting of ( ) and ( ) in a series connection。
答案: fixed differential pressure-reducing valve throttle valve

Chapter 1 Introduction to Hydraulic and Pneumatic Transmission Test

1、 Which of the following is not an advantage of the hydraulic system ( )

A:With the same size structure, the hydraulic system can deliver greater power
B:Small inertia, rapid starting and braking, smooth movement
C:Convenient for stepless speed regulation, wide speed regulation range
D:Higher transmission efficiency
答案: Higher transmission efficiency

2、 Which of the following is not a disadvantage of the hydraulic system ( )