Eaton Ch2

Question 1

A hydraulic device which uses the impact or kinetic energy in the liquid to transmit power is called a ______ device

Hydrostatic
Hydrodynamic
Kinetic
Pressure

Answer 1

Hydrodynamic

Question 2

When a device is operated by pressure on a confined fluid, it’s called a_______ device. Pressure being a force per unit area (lbs/sq in or psi)

Hydrostatic
Hydrodynamic
Kinetic
Pressure

Answer 2

Hydrostatic 

Question 3

The tendency to cause flow (or the push) maybe supplied by mechanical pump or maybe caused simply by the ____ of fluid

Pressure
Flow
Weight
Power

Answer 3

Weight 

Question 4

Pressure per square inch which is created by the height of the fluid is called_____ this varies with the type of fluid being considered depending upon its weight per cubic foot (density)

Pressure head
Power
Flow rate
Effort

Answer 4

Pressure head 

Question 5

Atmospheric pressure =_______ pounds per square inch absolute

1.47.
14.7.
4.47.
44.7.

Answer 5

14.7.

Question 6

The pressure at the top of the Barometer tube is______

0 psi
1 psi
30 psi
29. Psi.

Answer 6

0 psi

Question 7

30 psig= ______ psia

1.47.
14.7.
4.47.
44.7.

Answer 7

44.7.

Question 8

The flow of a fluid can be measured by either velocity(e.g. Feet per second, or feet per minute.) or by_____(volume per minute)

Pressure head
weight
Flow rate
Force

Answer 8

Flow rate 

Question 9

5 GPM= _____ cubic inches per Minute

11155
1155
.000583.
.0583.

Answer 9

1155

Question 10

A difference in pressure at 2 different points in a horizontal hydraulic line indicates that there is_____

Flow
Power
Weight
Pressure

Answer 10

Flow 

Question 11

Working pressure at the pump. Outlet is the sum of the ____ created by fluid friction within the piping and system components, and the pressure needed to perform the work required

Force
Power
Pressure
Rate 

Answer 11

Pressure 

Question 12

When the particles of the fluid move parallel to each other and to the walls of the pipe flow is said to be___

Kinetic
Turbulent
Laminar
Atmospheric 

Answer 12

Laminar 

Question 13

Abrupt changes in flow direction or to high a velocity of the fluid may cause ____ flow

Laminar
Turbulent
Kinetic
Inward

Answer 13

Turbulent 

Question 14

Two forms of energy within the hydraulic fluid are ____ and potential

Laminar
Turbulent
Kinetic
Static

Answer 14

Kinetic

Question 15

If flow______ at various points in a hydraulic system remains constant, the sums of the pressure, energy and kinetic energy are also constant( ignoring frictional loss)

Power
Pressure
Heat
Rate

Answer 15

Rate

Question 16

Working lines carry Main system flow from the pump inlet through the system and also return flow to Reservoir._____ lines carry fluid for Control in operation of other valves are components. Drain lines return leakage oil to Reservoir.

Pilot
Port
Drain
Pressure

Answer 16

Pilot

Question 17

A circle with an energy triangle at the circumference, pointing in words for a pump or_____ in the case of a motor is called a graphical symbol

Laminar
Outward
Inward
Upward

Answer 17

Inward 

Question 18

How many envelopes are in the symbol for a relief valve

One 
Two
Three
None

Answer 18

One

Question 19

Connecting lines, drawn to the bottom of the reservoir symbol represent lines that terminate_____ fluid level
Above
Below
Within
Flow

Answer 19

Below

Question 20

How many positions does the directional valve in figure 2–18 have?

One
Two
Three
None

Answer 20

Three