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IET > Hydraulics > Flashcards

Hydraulics Flashcards

1
Q

The hydraulic press is an example of what law?

A

Pascal’s law

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2
Q

T/F a smaller weight can move a larger weight with a lever but the lever must move a greater distance

A

True

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3
Q

Force can be measured in what?

A

Pounds

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4
Q

Increasing force in a hydraulic system causes what?

A

Pressure to increase

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5
Q 
Pascals law explains how:
Fluid stays in a barrel
A small jack can lift a two ton car
An oil tanker floats
To calculate the force of gravity
A

A small jack can lift a two ton car

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6
Q

T/F Pascal’s law states that any change in pressure in an enclosed fluid is applied equally to all the fluid in the enclosure

A

True

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7
Q 
What innovation allowed hydraulic technology to explode and be used in practical ways for the first time?
Force pump
Aqueduct
Steam shovel
High pressure hose
A

High pressure hose

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8
Q 
What is pressure?
Weight of an object
Force acting on a given area
The area of a pair of snowshoes
Gravity
A

Force acting on a given area

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9
Q

T/F A 4/3 way DCV relieves fluid pressure.

A

False

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10
Q

T/F double acting cylinders can only apply force in one direction

A

False

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11
Q

T/F Hydraulic systems use oil rather than water because its self lubricating, has more viscosity and doesnt lose energy

A

True

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12
Q 
Single acting cylinders apply force in:
Only One direction
Two directions
All directions
Multiple directions
A

Only one direction

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13
Q

T/F The filter removes impurities from the oil to allow the hydraulic system to work at maximum efficiency

A

True

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14
Q 
The hydraulic system pulls this component from the reservior:
Electricity
Fluid
Coolant
Contaminants
A

Fluid

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15
Q

T/F The pressure relief valve maintains the minimum pressure in the hydraulic circuit

A

False

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16
Q 
The purpose of the hydraulic system is to perform work in the real world. What component actually performs this work?
Pump
Reservoir
Actuator
Accumulator
A

Actuator

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17
Q 
The schematic symbol for a flow line is:
An upside down triangle
The letter "E" lying flat
A diamond with a dotted line through it
A straight horizontal line
A

A straight horizontal line

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18
Q 
Which component allows an actuator to maintain its pressure even after the pump stops?
Directional control valve
Check valve
Reservoir
Hose
A

Check valve

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19
Q 
This component stores energy in the form of pressurized gas:
Accumulator
Actuator
Pump
Reservoir
A

Accumulator

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20
Q 
This valve has two ports and two switching positions, allowing fluid to flow both ways through the valve:
3/2 way valve
4/2 way valve
4/3 way valve
2/2 way valve
A

2/2 way valve

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21
Q 
What is fluid movement called?
Flow
Pressure
Resistance
Energy
A

Flow

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22
Q 
Which type of machine removes material from a workpiece by pushing or pulling a tool with teeth through the material?
Stamping machine
Foraging machine
Broaching machine
Workholding machine
A

Broaching machine

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23
Q

T/F Before performing system maintenance, you should work the valves in all positions

A

True

24
Q 
Before working or performing maintainence on any hydraulic system, first allow the system to do what?
Warm up
Cool completely
Run for several hours
Never perform maintainence on a system
A

Cool completely

25
Q 
How long should you wait for the hydraulic system to cool down after operation?
10 minutes
30 minutes
45 minutes
1 hour or more
A

1 hour or more

26
Q

T/F if a high pressure hose breaks, it can continue flailing even when the pump has stopped operating.

A

True

27
Q

T/F The accumulator can hold pressure to operating levels even when the pump isn’t running.

A

True

28
Q 
The best way to check for a pinhole leak is
With your hand
With your arm
With a piece of wood or cardboard
To examine the hose
A

With a piece of wood or cardboard

29
Q

T/F The most important concern when working in any type of manufacturing is safety

A

True

30
Q 
What is one thing you should not do during operation of a hydraulic system?
Service the system
Turn the system off
Follow the operating manual
Call your supervisor
A

Service the system

31
Q 
What should you do if you think you've recived a pinhole leak injury?
Seek medical attention immediately
Put a bandage on it
Ignore it
Wash the area and return to work
A

Seek medical attention immediately

32
Q 
What should you do when a high pressure hose fails and begins leaking
Break for lunch
Tell your coworkers
Press the E stop button
Repair the problem yourself
A

Press the E stop button

33
Q 
Always report any problems you find to:
Your supervisor
The maintenance team
Your coworkers
Research and development
A

The maintenance team

34
Q 
Checking the oil cooler and the heat exchanger to see if theyre working means that youre looking for what type of problem?
Low fluid
Low pressure
Pump failure
Burning smells
A

Burning smells

35
Q

T/F following a maintenance program is the most effective way to prolong system life.

A

True

36
Q

T/F Its a good idea to listen for unusual sounds from the system pump and report them to maintenance

A

True

37
Q 
Most contaminants, such as dirt, dust, debris, and water, enter the hydraulic system through the:
Reservoir
Valves
Filters
Dipstick
A

Reservoir

38
Q

T/F No matter how careful you are, normal operations will admit some contaminants into the hydraulic system

A

True

39
Q 
What types of areas on cylinders and valves indicate leaks?
Dry clean areas
Wet or dirty areas
Pinched areas
Hot areas
A

Wet or dirty areas

40
Q 
To perform an out of circuit test, a component can be placed on a 
Reservoir
Calibration tester
Test bench
Work cell
A

Test bench

41
Q 
When working around hydraulic equipment:
Wear loose fitting clothes
Wear canvas shoes
Remove any rings
Wear long sleeves
A

Remove any rings

42
Q 
Before you bleed the system pressure during troubleshooting:
Check the pump flow rate
Check the system pressure
Remove all shields
Support any overrunning loads
A

Support any overrunning loads

43
Q 
\_\_\_\_\_ test ports allow you to take pressure measurements without breaking into a hydraulic line to install a tee
Line
System
In line 
Valve
A

Valve

44
Q 
An increase in flow from the \_\_\_\_\_ can indicate excessive wear
Outlet of an actuator
Pump
Case drain
Motor
A

Case drain

45
Q 
Which method of flow measurement requires a shutoff valve to divert flow from the system through the flow meter?
Inline
Bypass
Isolation
Reroute
A

Bypass

46
Q 
A pressure change problem in a multiple pressure circuit is a \_\_\_\_\_ related fault.
Machine sequence
Machine performance
System
Machine execution
A

Machine sequence

47
Q 
Which of these forms of system level troubleshooting do experts recommend against using?
Symptom and cause
Half-split
Output back
Shotgun
A

Shotgun

48
Q 
Worn \_\_\_\_\_ in a cylinder can allow leakage that can result in slow actuator speed.
Cushions
Seals
Reverse flow checks
Sleeves
A

Seals

49
Q 
Fast actuator speed can by flow control valves, relief valves, and:
Pumps
POC valves
Counterbalance valves
DCVs
A

Pumps

50
Q

T/F one of the major causes of incorrect deceleration is misadjustment of the deceleration components

A

True

51
Q

What percent of all hydraulically powered machine downtime and malfunctions are due to contamination in the fluid?

A

More than 50%

52
Q 
The most common location for a filter is in the \_\_\_\_\_, where the filter cleans all fluid returning to the reservoir.
Pump
Main Return line
Motor
Reservoir
A

Main return line

53
Q 
A(n) \_\_\_\_\_ filter has a filter element enclosed inside a metal shield.
Spin-on
Cartridge-type
Suction strainer
Pump
A

Cartridge-type

54
Q 
A(n) \_\_\_\_\_ is a device used in the suction line of a hydraulic system to remove contaminating particles
Spin-on filter
Suction Strainer
Cartridge-type filter
Reservoir
A

Suction strainer

55
Q 
As a filter collects dirt, the \_\_\_\_\_ difference will grow, indicating that it is time to clean or replace the filter
Pressure
Volume
Flow
Dissolved solids
A

Pressure

IET (7 decks)

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