Hydraulics Test

Question 1

The meter out type curcuit for a linear actuator will control actuator speed and…

Answer 1

Can create higher than system relief pressure

Question 2

What is this?

Answer 2

Pressure intensifier

Question 3

A DCV having a float center spool is best suited for applications using…

Answer 3

A pilot operated check valve

Question 4

Osillating motors in a hydraulic system are catagorized as being

Answer 4

Rotary Actuators

Question 5

Describe the symbol

Answer 5

Gas charged accululator

Question 6

Where increased force is required and bore size must remain the same a________ cylinder is used.

Answer 6

Tandem

Question 7

Piloted operated relief valves have a orifice in the spool. What is the purpose of this

Answer 7

B. To allow oil pressure above the spool to balance it.

Question 8

To create a positive seal to the cam ring vane type pumps use intra-vanes, pin-vanes, spring loaded vanes and

Answer 8

C. Centrifugal force

Question 9

Thermal overload protection on a hydraulic system is provided by fitting which of the listed devices to the reservoir?

Answer 9

C. Temperature Switch

Question 10

Describe this symbol

Answer 10

Mechanically Weighted Accumulator

Question 11

A pilot operated relief valve has a plugged spool drain passage. How will this affect the valve operation?

Answer 11

C. Will not open at any pressure

Question 12

A double rod linear extends and retracts at

Answer 12

A. Same speeds

Question 13

Pressure differential in a hydraulic system indicates that

Answer 13

C. Working energy is present in the form of a moving pressurized liquid

Question 14

What would a pressure drop in a hydraulic line indicate in a system that seems to be operating normally

Answer 14

D. That an actuator is moving

Question 15

A positive displacement pump develops constant flow and will apply whatever_____ is needed to overcome any _______.

Answer 15

C. Pressure, resistance

Question 16

Fluid resistance to flow in a hydraulic system is turned into

Answer 16

C. Heat

Question 17

In hydraulics, three conditions are measured and monitored to evaluate preformance. These are

Answer 17

C. Pressure, flow and temperature

Question 18

When the maximum system pressure has been reached in a accumulator circuit that is controlled by a unloading relief valve, the unloading relief valve will

Answer 18

D. Direct the full pump output to the tank at very low pressure.

Question 19

What is the best connection method for pipe that has to be frequently disassembled

Answer 19

A. Flange

Question 20

A general start up procedure after maintenance of a hydraulic system includes fluid level check, secure fasteners, safety responsibilities, and

Answer 20

A. Bleed and prime components

Question 21

A pump manufacturer specifies the inlet pressure to be 4” Hg on one of their pumps. This means that

Answer 21

D. Less than 4” Hg needs to show on the vacuum gauge.

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