Start

Question 1

How does this crankshaft get its ability to change rotary motion to reciprocating

Answer 1

From the design of the throws

Question 2

Thirty seven degree angle included

Answer 2

Flare angle standard for hydraulic

Question 3

To seal outdirt, that’s carried on the surface of the rod

Answer 3

Rod wiper

Question 4

Most desired flow ian hydraulics

Answer 4

Laminar. It can be achieved by reducing the velocity of the fluid.

Question 5

Pumps only create flow not pressure

Answer 5

True

Question 6

6 volt

Answer 6

Wire alignment vertical

Question 7

Cause of wear on a cylinder

Answer 7

Misalignment

Question 8

A plate with the hole in the middle

Answer 8

Orifice

Question 9

Slower the motor turns

Answer 9

More torque

Question 10

Check valve

Answer 10

Simplest directional valve

Question 11

How to detect leakage in a cylinder

Answer 11

Hotspots

Question 12

What does a decrease in mechanical efficiency indicate

Answer 12

Increase in internal friction

Question 13

If you rebuild a gear motor with new parts and you find it turns freely by hand what is the problem with the motor

Answer 13

Clearances are too loose

Question 14

Disadvantage of a wire alignment

Answer 14

Sag

Question 15

Lowest dew point

Answer 15

Adsorption

Question 16

What does a condenser do

Answer 16

Removes heat

Question 17

What to do with ammonia splashes on your clothes

Answer 17

Dilute with plenty of water

Question 18

Vane compressor

Answer 18

Positive displacement wet or dry
Vibration free. Low to medium

Question 19

Two inlet ports and two discharge ports for each impeller. 180 degrees opposite

Answer 19

Liquid ring

Question 20

How to check for misalignment on a crank shaft

Answer 20

Deflection gauge

Question 21

What are the two types of hydraulic actuators

Answer 21

Linear and rotary

Question 22

Less than atmospheric pressure

Answer 22

Vacuum

Question 23

How is flow created

Answer 23

Differential pressure

Question 24

How can we determine the speed of an actuator

Answer 24

If we know the rate of flow and size of the cylinder

Question 25

What are the two types of flow

Answer 25

Laminar and turbulent

Question 26

What is turbulent flow

Answer 26

When fluid particles do not move smooth caused by abrupt changes in direction.

Question 27

Larger the diameter

Answer 27

Greater the pressure

Question 28

What does a hydraulic motor do

Answer 28

It converts fluid energy into mechanical energy rotary or a torque

Question 29

Hydraulic pump creates

Answer 29

Flow by pushing the liquid received from the reservoir

Question 30

Non positive pumps

Answer 30

Hydrodynamic

Question 31

Non positive pumps resistance

Answer 31

Only resistance is the weight of the fluid

Question 32

Can you shut off the discharge on a non positive pump

Answer 32

Yes and it will continue to run

Question 33

Positive displacement pump

Answer 33

Inlet and outlet ports are positively sealed from each other

Question 34

What happens to a positive displacement pump? If the flow is blocked

Answer 34

Pressure will increase

Question 35

Fixed displacement

Answer 35

Cannot change the displacement without changing internal components

Question 36

H s l t

Answer 36

Inline piston, bend axis vain and gear

Question 37

L s h t

Answer 37

Internal gear radial piston, axial piston bent axis piston

Question 38

When do you need to reflector

Answer 38

Single beam/ single deflector

Question 39

Disadvantage of a laser

Answer 39

Freezing temperatures

Question 40

Dynamic interruption

Answer 40

Beam no longer hits the transponder

Question 41

Refraction

Answer 41

Laser shooting too hot spot

Question 42

How long should you flush eyes for if hydraulic fluid gets in there

Answer 42

20 min

Question 43

New cylinders are commonly hydro, tested to approximately

Answer 43

One and a half times the maximum allowable, working pressure

Question 44

Crosshatched pattern on a cylinder

Answer 44

Forty to sixty degrees

Question 45

Cleaning a cylinder

Answer 45

Wash with soapy water after honing. Wipe with a lint free rag

Question 46

What should you never do to an operator pressurized?Cylinder

Answer 46

Tighten the bolts

Question 47

Decreasing suction pressure results in

Answer 47

Increasing compressor rod loading

Question 48

The weight is that clearances between the piston and the cylinder head is to have

Answer 48

2/3 on the head end. 1/3 total clearance left on the crank end.

Question 49

What are two types of cylinders

Answer 49

Wet and dry

Question 50

Where should the markings on the oil wiper ring's face

Answer 50

The crank end

Question 51

Compressor frames

Answer 51

Cast iron heat treated to relieve stress

Question 52

Compressor crankshaft the stroke is equal to

Answer 52

Twice the throw

Question 53

How to balance the reciprocating force in a reciprocating compressor

Answer 53

I opposed throws or counterweights

Question 54

What can cause twisting of the frame

Answer 54

Opposed throws

Question 55

Pressure measuring device of a vacuum

Answer 55

Manometer

Question 56

Expansion joins

Answer 56

Reduces pipestrain

Question 57

Smooth flow of vain axial

Answer 57

Guide veins

Question 58

What does a condenser do

Answer 58

Remove heat

Question 59

Valve to change the required load

Answer 59

Brake valve

Question 60

Should you use copper pipe with ammonia

Answer 60

No it is very corrosive

Question 61

What creates pressure

Answer 61

Resistance to flow

Question 62

X

Answer 62

Ports for pilot supply

Question 63

Y

Answer 63

ports for pilot drain

Question 64

What must you do if you have to work on a hydraulic system

Answer 64

Lock out, bleed system. Never trust gauges

Question 65

Working line

Answer 65

To the bottom of the tank, or below fluid level

Question 66

Drain line

Answer 66

Above the tank or above fluid level

Question 67

Hydraulic unit acting sporadic

Answer 67

There's air in the unit and it is compressible. Hydraulic oil has very little compressibility

Question 68

Hydraulic pumps

Answer 68

Mostly all positive displacements

Question 69

Swatch plate with the movable yolk

Answer 69

Variable displacement

Question 70

Maximum angle on a swash plate

Answer 70

17.5

Question 71

Because the pump pulls a vacuum it will cause cavitation

Answer 71

Check for a clugged strainer or thick oil

Question 72

When to check for loose fittings on the suction side of a pump

Answer 72

When air gets into the system right and it causes a spongy symptoms at the actuators

Question 73

If rotation and speed are correct, but no pressure

Answer 73

Check for broken spring on the relief valve

Question 74

Force=

Answer 74

Area x pressure

Question 75

Directional control valve

Answer 75

Start and stops. Includes 2 3/4 way valves

Question 76

Viscosity

Answer 76

Fluids resistance to flow

Question 77

When a system in the idle, where does the fluid go

Answer 77

Straight to the relief valve

Question 78

On a single rod, two lines are connected and pressured at the same time

Answer 78

Extend

Question 81

Definition of pressure

Answer 81

Force on a unit of area

Question 83

What are the 4 ways to unload a pump

Answer 83

vent the relief use an unloading relief on/off valve pilot operated unloading valve

Question 85

how is the stroke increased on an axial piston pump

Answer 85

Increase the angle of the swash plate

Question 87

which swash plate control limits the maximum pressure in a system?

Answer 87

Pressure limiting compensator

Question 89

how can you increase the flow from a rotary piston pump?

Answer 89

Move the reaction ring away from the center