A jaw type clutch __________.

Is the simplest of positive clutches

Which of the following is NOT true about cavitation?

- One of its effects on the pump is increased lubrication

On a multiple belt V-belt drive __________.

All belts should have the same match code

A centrifugal clutch will engage __________.

- When the drive shaft reaches a certain speed

What two categories do belt manufacturers use when creating tables to aid in troubleshooting?

Inspection Faults and Operating Faults

When installing a piece of equipment, if you discover the instructions are incomplete, you should __________.

- Contact the OEM for clarification

Why would a digital indicator be preferred over a dial indicator in automation applications?

Readings can be electronically transmitted to a controller

you have a partial blockage at the lubricator,what is one easy check you can do before taking the lubricator unit apart?

Check the input and output pressures for a significant difference

The taper lock bushing has __________.

Semi-circular holes that match with semi-circular holes in the hub

Identify one reason a hydraulic cylinder would bang at the end of its stroke.

Improperly adjusted cylinder cushions

When measuring a part that is shorter than the reference, how is the final length determined?

- Subtract the value of the indicator reading from the master part length

What might it mean when cleaning out contaminants does NOT fix low pressure?

The filter is too small for the system's needs

The function of a clutch is to __________.

Provide a coupling between two rotating shafts

Overload clutches protect the drive motor and equipment when _

Something jams or binds in the machinery

studbud

51 + 38 + 36 + 35 + 40 + 39 + 41 + 42 + 43 + 44 + 45 + 46 + 47 + 48 + 49 + 50 + 34 + 33 + 32 +

199 termsStudBud Administration11 plays

modules 29-51

Flashcards199 cardsFPractice quizPHost liveL

Questions 199

Answers

1
What is the function of a chain breaker?
- None of the above
To sever a chain in two
to remove a link from chain
To dispose of an unusable chain
2
The graphic shows an example of a(n) __________.
Split taper bushing
- Taper lock bushing
Multiple belt sheave
QD bushed sheave
3
Which of the following measurement devices are indirect measurement tools?
both A and B
shotgun
Optical comparator
- Indicator
4
Which of the following is NOT a typical symptom of a failing relief valve?
Noisy operation
No pressure
Valve misadjusted
Pressure erratic or sluggish
5
A jaw type clutch __________.
Generates heat when engaged
Is the simplest of positive clutches
Can be engaged at any speed
- Should be slipped to provide a "soft start"
6
A fault of using isolation valves is that this can cause pressure shocks to the gauge and reduce its lifespan
False
True
7
Current going to an electrically operated motor brake ___
Releases it
Stops the motor
- Allow the motor to stop the load smoothly
- Adjust the drag
8
Filters need to be chosen that __________.
Fit the thread size
Meet the OEM specifications
Fit the enclosure
Match color of equipment
9
Vacuum gauges indicate to the technician the difference between __________ and the atmosphere.
- Hydraulic pressure
System pressure
Water pressure
Electrical pressure
10
Sometimes a rotary actuator which fails to start might be due to the load. True or False
False
True
11
Which of the following is NOT true about cavitation?
It can cause the pump to sound like it has marbles in it
- One of its effects on the pump is increased lubrication
They occur when the hydraulic oil flow at the pump inlet is restricted
formation and collapse of gaseous oil cavities in the liquid in the pump
12
How often should the oil of a chain drive be changed?
- Every 1500 hours of operation
Every 2500 hours of operation
Every 2000 hours of operation
Every 1000 hours of operation
13
Compared to the QD bushing, the split taper __________.
- Is smaller and lighter
Has a lower degree of taper
- Tends to slip under heavy loads
Has a higher degree of taper
14
Which of the following are advantages of digital indicators?
all the above
quicker to read
connect to computers
easier to read
15
There are three classes of pneumatic system faults; they include machine sequence faults, system faults, and __________.
Electrical system faults
Line faults
Compressor faults
Machine performance faults
16
On a multiple belt V-belt drive __________.
Minor variations in belt length are allowed
- All belts having the same nominal size will be equal in length
All belts should have the same match code
Only the outer tension is checked
17
This test can help identify faulty components.
System
Temperature
Out-of-circuit
In-circuit
18
When working around pneumatic equipment you should ____
Remove any rings
Wear long sleeves
Wear canvas shoes
Wear loose fitting clothes
19
Which symptom of pressure-reducing valve failure can be caused by a blocked drain?
Outlet pressure too high
No reverse flow
No flow downstream
Low pressure
20
A centrifugal clutch will engage __________.
- When the drive shaft reaches a certain speed
- When the clutch pedal is released
When the engine oil reaches a certain temperature
When the electric field is energized
21
Multiple-strand chain drive sprockets constructed of one or more single sprockets that have been joined together side by
True
False
22
What two categories do belt manufacturers use when creating tables to aid in troubleshooting?
Categories vary by manufacturer
Probable Causes and Faults
Inspection Faults and Operating Faults
Preventative Maintenance and Repairs
23
A zero system pressure fault occurs when a __________ fails and the pump stops, or __________ to the flow stops.
Fan, direction
Machine, control
Component, resistance
- Circuit, cooling
24
Which of these components are part of an electrical lockout/tagout system?
All of the above
- Tag
- Lock
Hasp
25
which dial indicator component enables the indicator to be zeroed to a reference dimension?
Revolution counter
Bezel
probe
dial face
26
Which of the following faults is associated with noisy operation?
Worn spool
Open vent port
Insufficient control spring force
Pulsing pressure
27
What are the ends of a chain in a chain drive fastened together with?
Rivet
master link
Half-link
spring clip
28
Updated drawings after equipment installation are provided by the __________.
building engineer
building manager
Machine operators
OEM
29
flow rate measurements are taken using special devices like pitot tubes, orifice plates, and ___
Rotameters
- Barometers
Bourdon manometers
Test gauges
30
check valve which will not open in free flow direction indicates not enough pressure, the checking element stuck due to
Heat
Water
Air
Debris
31
When installing a piece of equipment, if you discover the instructions are incomplete, you should __________.
- Contact the OEM for clarification
- Install the equipment using your best judgement
Refuse to install the equipment
- Update the instructions
32
Why would a digital indicator be preferred over a dial indicator in automation applications?
faster
easier to read
Readings can be electronically transmitted to a controller
more accurate
33
you have a partial blockage at the lubricator,what is one easy check you can do before taking the lubricator unit apart?
Look for kinks in the air lines
Blow compressed air through the line
Check to make sure the oil level is not too high
Check the input and output pressures for a significant difference
34
What is the flow rate formula?
Q = T / V
Q = V × T
Q = TV
Q = V / T
35
The taper lock bushing has __________.
- A threaded hole that must be aligned with a threaded hole in the hub
Semi-circular holes that match with semi-circular holes in the hub
Three (3) unthreaded semi-circular holes
A flange similar to the QD bushing
36
Identify one reason a hydraulic cylinder would bang at the end of its stroke.
Too much air in the system
Cylinder rod is bent
System has cavitation
Improperly adjusted cylinder cushions
37
When measuring a part that is shorter than the reference, how is the final length determined?
- Use only the dial indicator reading for the part
Use a different reference part that is shorter
- Add the value of the indicator reading to the master part length
- Subtract the value of the indicator reading from the master part length
38
Which of the following is NOT a typical column on a rotary actuator troubleshooting chart?
Test method
Actuator speed
Possible cause
Remedy
39
when a cone clutch is engaged, the cone is pushed against the __________ by the clutch spring.
fork
bearing
plate
cup
40
Which of the following is NOT a common column of a cylinder troubleshooting chart?
Rod movement
Fault
Test method
Possible cause
41
What might it mean when cleaning out contaminants does NOT fix low pressure?
The filter is too big for the system's needs
None of the above
The system is contaminated
The filter is too small for the system's needs
42
The function of a clutch is to __________.
- Increase torque while reducing shaft speed
Provide a heat sink between a motor and a shaft
Provide a coupling between two rotating shafts
- Reduce vibration between two mating surfaces
43
What is the measuring tool that is useful for accurately checking the alignment of machinery shafts?
Bubble
- Micrometer
caliper
Dial Indicator
44
Overload clutches protect the drive motor and equipment when _
Power is interrupted while the motor is energized
The motor overheats
Something jams or binds in the machinery
Spring pressure on the friction facings is reduced
45
True or false: When preparing tubing for installation, you should include at least one bend.
False
True
46
Which of the following is NOT one of the four common types of brakes?
Plate
Band
Shoe
Boot
47
Which of the following can cause components to stick?
All of the above
Buildup of shellac deposits
Breakdown of oil
High oil temperatures
48
The third component of the branch line air supply is the pressure regulator which acronym is the three components known.
It is not known by an acronym
The RLF
The FRL
The LRF
49
The three common symptoms related to quick exhaust valve failure include slow actuator speed_and faulty actuator timing.
No actuator speed
Too much actuator speed
Erratic actuator speed
Noisy actuator operation
50
To measure a Wedge Belt you must measure along the pinch line, therefore, belt marked: 5V850 what be its nominal length
85 inches
850 millimeters
- 5 meters
850 centimeters
51
A differential gauge on a filter measures the difference between the __________ and __________ of the filter.
Inlet, outlet
Fast side, slow side
- On, off side
High side, low side
52
if you need a high pressure but lower volume flow which schedule number would be your best choice?
Schedule 160
Schedule 20
Schedule 80
Schedule 40
53
Which of the following is a type of fitting?
A port
A conductor
A hose
A coupling
54
True or False: the idle wheel should ALWAYS be mounted against the tension side of the belt.
True
False
55
In a pneumatic distribution system, what components tee off of the main distribution line?
Drop legs
Branch lines
Drip legs
Drain legs
56
What is the primary purpose of a suction strainer device?
Clean old hydraulic oil during oil change periods
Prevent chattering in valves downline
Stop microscopic particles from blocking needle valves
Stop large particles from damaging the pump
57
Particles as small as __________ microns can damage a regulator and lead to a blockage.
500
5
100
50
58
Which of the following is NOT a material needed to bleed a hydraulic cylinder?
A lint-free cloth
Tools to open the port or loosen the fitting
A bucket
A filter cart
59
Which of the following can cause excessive hydraulic system vibration?
Poorly supported piping
Mechanical misalignment
All of the above
Motor-to-pump coupling
60
gas compresses,its volume shrinks and its temperature rises. Air leaving the discharge valve of a compressor ranges from
true
false
61
Which of the following is a tool used to determine when a filter element needs changing?
A bypass indicator
A differential gauge
- An electrical pressure differential switch or transducer
All of the above
62
Where can the proper fluid for a hydraulic system be found?
None of the above
On the system label
- In the system user manual
On the container label
63
Actuator drift indicates which symptom of check valve failure?
Not checking flow
Slow drop-off in checked pressure
- External leakage
No flow
64
Which of the following is a typical location that a test point tee is installed in hydraulic lines?
- Somewhere between the components
Both of the above
Directly to a port or valve on a component
None of the above
65
Which of the following is a safety rule for safe hydraulic troubleshooting?
Do not work on slick floors
Remove stored power
Support any overrunning loads
all the above
66
Which type of pneumatic system fault is a malfunction in the machine's operation steps?
None of the above
System fault
Machine performance faults
Machine sequence faults
67
mastering indicator is important the part used as a master is placed in the same position as the parts to be measured.
False
True
68
What is the last step in measuring a part using indirect measurement?
measure the part
add the master link to the dial indicator reading
add the dial reading with the revolution counter reading
measure the master
69
The most common components that cause a zero system pressure fault are pumps, relief valves, and DCVs.
False
True
70
True or false: Hydraulic equipment has moving parts through which high forces are often transmitted.
True
False
71
Which of the following is an indicator of a low system pressure fault?
Actuators moving erratically
Actuators moving slowly or not at all
Actuators moving quickly
None of the above
72
What is a rotary actuator's a typical range of motion?
90 degrees
- 160 degrees
280 degrees
360 degrees
73
True or false: A differential pressure gauge measures the difference between the pressures at two ports.
True
False
74
True or falseDuring the operation of a DCV,pilot supplies air to the end of the main valves spool and forces it to shift
True
False
75
True or false: Strainers never have bypass valves.
False
True
76
Many valves are __________, permitting valve replacement without disturbing the plumbing.
Pivot mounted
Subplate mounted
Centerline mounted
Non-centerline mounted
77
Too much hydraulic oil can cause the reservoir to overflow. What happens to the oil if the fluid gets too low?
Vortexing, air gets in the system
The system overheats
Nothing, it can run well low
Actuators run slowly
78
In most cases, where should an idler pulley be mounted?
On a fixed height mount
None of the above
The tension side of the belt
The slack side of the belt
79
Why would high oil temperatures cause a hydraulic system to fail?
Causes components to be too hot
Causes oil to evaporate
Causes air to bubble off
Causes oil to break down
80
Which of the following is not a symptom of a failed DCV?
DCV not shifting
Sluggish response
DCV spool always returning to Neutral
Valve function is incorrect
81
Which symptom of pilot-operated DCV failure involves a delay in air delivery to the actuator?
Shifting is noisy
Valve responds sluggishly
Spool does not return to neutral
Valve functions incorrectly
82
Which hose layer is often made of cotton, synthetic material, or wire?
Liner
Cushion
Reinforcement
Cover
83
If you have an actuator which is moving too quickly, the __________ may not be working properly.
speed compensating valve
Drain relief valve
Pressure reducing valve
Relief valve
84
True or false: One of the causes of actuator speed decrease is dirt lodged in the orifices of the needle valve section.
True
False
85
True or false: it is best to perform the most difficult tests first to eliminate them.
True
False
86
True or false: A weak control spring in a relief valve can cause low pressure.
True
False
87
True or false: Component substitution is often slower than other tests.
True
False
88
vacuum generator appears to generate low vacuum pressure, the first test you should perform is a _ test of the fittings.
Percussion
Hydrometer
Continuity
Leak
89
Electromagnetic brake actuators use __________ to engage the brake and __________ to disengage the brake shoes.
- DC magnets, springs
DC magnets, hydraulics
- Hydraulics, DC magnets
Springs, DC magnets
90
Once a fitting on the drain line is cracked open, what would indicate that the drain flow is blocked?
- Leaking fluid
Slow flow
Fast flow
No flow
91
Which method of fluid flow measurement involves adding a load valve?
Case drain flow measurement
Bypass flow measurement
Measurement of flow to actuator
Inline flow measurement
92
True or False: In many cases, the exact length of a particular belt varies a little from the nominal length.
False
True
93
what valve can cause high system pressure when it does not dump flow from one of the pumps in a tandem pump circuit
Directional control valve
Relief valve
None of the above
Unloader valve
94
Which of the following would accurately determine the pitch length of a chain?
Multiply the length of the chain by the pitch
None of the above
Multiply the number of pitches in the chain by the pitch
Multiply the sag of the chain by the pitch
95
What can a belt idler pulley be used for in a V-belt drive?
- Keep long belts from whipping
- All of the above
Add tension to the belt
Automatically adjust tension under varying loads
96
Which of the following is the second step in the process of installing a multiple-strand chain drive system?
inspect the sprockets
Mount the motor
- Align the sprockets
- Mount the chain
97
To determine the safe operating pressure of a particular control valve, look in the __________.
Installation drawings
Plant drawings
Loop diagrams
Manufacturer's specifications
98
True or false: A flow control valve combines both a check valve and needle valve into one unit.
False
True
99
Cylinder drift can be caused by __________.
Pilot-operated check valves
Incorrect fluid flow
Internal leakage
Misadjusted cylinder cushions
100
The __________ should be checked across the ports of the motor if a blocked port is suspected.
Total pressure
Pressure differential
Vacuum
Flow
101
first approach a pneumatic system that requires troubleshooting, take the time to __________ the entire system.
Visually inspect
Manually operate
Pressure test
Wipe down
102
Noisy operation can be a symptom of which pilot-operated check valve fault?
- Checking element not closing
Not opening in free flow direction
Leakage between the seat and the checking element
- Check valve chattering with flow in free flow direction
103
Which symptom can indicate a misadjusted valve fault?
- Low pressure
All of the above
- No pressure
High pressure
104
Which type of sprocket is commonly used on bicycles?
Double Hub
No Hub
Detachable Hub
Triple Hub
105
A contaminated pneumatic system can cause slow or erratic actuator movement.
true
false
106
Before you remove pressure from the system, you should ____
Check the compressor's pressure reading
Remove all safety shields
Support any overrunning loads
Check the compressor's CFM
107
Which of the following is a major cause of pseudo-cavitation?
he shaft seal is worn
The fluid level in the reservoir is low
The suction line contains plumbing leaks
All of the above
108
If an adapter is found on hydraulic component's port, where would you find a coupling?
On the compressor
On a hose
On a Zerk fitting
On an adapter
109
you have No Actuator Movement symptom,one of the test to perform when troubleshooting is check for _ in the pump motor.
Incorrect wiring
Bent pump shaft
Burned wiring
Bad bearings
110
Body ported valves are commonly mounted to the machine by a(n) __________ or the connections to tubing.
screw
nut
coupling
Bracket
111
FHP belts are identified by the letter "L". There are four sizes of FHP belts; they include
- 1L, 2L, 3L, and 4L
2L, 3L, 4L, and 5L
5L, 10L, 20L, and 30L
2L, 4L, 6L, and 8L
112
To use a filter cart to replace the contents of the system reservoir, you must first shutdown the machine.
False
True
113
Which of the following is a common symptom related to rotary actuator failure?
Failure to start
Fast speed
All of the above
Speed fluctuation
114
Which generator failure symptom indicates that the generator is totally blocked?
Noisy operation
No vacuum pressure
Low vacuum pressure
None of the above
115
When performing V-belt maintenance, what is the first step?
Clean belts and sheave grooves
- Check sheave alignment
Check for sheave groove wear
Check belt tension
116
Which of the following is a possible cause of cavitation?
The suction lift is too low
The suction line is too large
The atmospheric pressure is low
The fluid is not viscous enough
117
Hydraulic hoses are built in layers of very specific , Which of the following is NOT one of those layers?
Boot
Reinforcement
Liner
Cover
118
Training flowcharts combine which two troubleshooting methods?
Output-back and shotgun
Half-split and shotgun
Symptom and cause and half-split
Shotgun and symptom and cause
119
Erratic actuator movement might indicate which fault?
Partially clogged filter
Air contaminated
Incompatible chemicals
Totally blocked port
120
A check valve which is chattering could mean there is low pilot pressure or __________ in the system.
Air
Oil
- Debris
Heat
121
When there is a pressure drop across a directional control valve, the likely indication is __________.
No work being done
No flow
Flow
A faulty coil
122
What is the primary benefit of a double-vane rotary actuator over a single vane rotary actuator?
hey produce greater speed
They can rotate further
They can produce more torque
They cost less
123
The three functions of brakes are __________
Vibrating, pulsing, and oscillating
Turning, accelerating, and shifting
shotgun
- Stopping, slowing, and holding
124
Which of the following is a typical column in a pilot-operated, AC solenoid-controlled DCV troubleshooting chart?
possible cause
test method
All of the above
symptom
125
Which of the following is a typical column in an inspection faults table?
Probably causes
Fault
All of the above
Corrective action
126
True or false: QEV faults are usually due to blocked valves or worn gaskets.
False
True
127
Which of the following signs of QEV failure involves air exhausting at the wrong time during the cycle sequence?
None of the above
No actuator speed
Slow actuator speed
Faulty actuator timing
128
There are four possible causes for high regulator pressures including using a non-venting regulator,the poppet seal worn
The regulator is mounted incorrectly
The regulator has failed and should be replaced
The DCV has failed
Regulator pressure is set too high
129
Which pneumatic system fault would likely occur if there were a problem with the air supply, such as a worn compressor?
Low pressure
High pressure
Zero pressure
None of the above
130
True or false: You can apply soapy water to a supply inlet to test it.
False
True
131
Which fitting industrial standard requires a 45° cone seat?
Japanese Industrial Standards (JIS)
None of the above
Joint Industrial Council (JIC)
Society of Automotive Engineers (SAE)
132
What information is needed in order to locate the correct brackets to install?
Description
Part number
Part location, if given
All of the above
133
___ is the quality of an object to resist a change in speed or direction of motion.
- Acceleration
- Centrifugal force
- Inertia
Thrust
134
Which of the following is a function of a regulator?
To control the air that is allowed to flow into the system
In case of venting regulators, to vent excess pressure to the atmosphere
All of the above
- To control pressure
135
Which type of bushing has industries such as the oilfield equipment industry standardized on?
All of the above
Taper lock
QD
Split taper
136
Why would a gauge block be used as the master, or reference block in indicator measurement?
Both b and c
none of the above
to reduce error
this is what is always used
137
The schedule number of steel pipe indicates the:
The size of the pipe
Type of fittings to be used on the pipe
The length of the pipe
Wall thickness of the pipe
138
True or False: Cartridge valves can be supplied by the manufacturer with or without a body.
False
True
139
All of the following are likely oil contaminates that can be present in a sample of oil EXCEPT __________.
Water
Electrical insulating particles
Organic particles
Ferrous or metallic particles
140
Which of the following indicates water contamination of oil?
Red color
Milky color
Suspended materials
High solids
141
lockout valve is a two-position valve that in its closed position blocks the supply line and ___downstream air pressure.
Regulates
Vents
- Increases
Maintains
142
A blown shaft seal on a hydraulic motor is usually the result of __________.
A blocked case drain line
Excessive flow from the pump
High system pressure
External contamination
143
Before opening a check valve, which pressure must be checked?
- Inlet pressure
Both of the above
Outlet pressure
None of the above
144
A silent chain is how much quieter than a roller chain?
50%
35%
100%
75%
145
Mechanically, a __________ is the possible cause of cylinder drift.
Blocked cylinder port
- Bent rod
Physical obstruction
Worn piston seal
146
True or false: With V-belts, the belt deflection force is determined using a table.
True
False
147
A benefit of a friction-type clutch is _______
It transmits torque in one direction only
It generates heat
It does not slip
It can be engaged at high speed
148
Which of the following is a function of a portable filter cart?
All of the above
Transfer oil
Flush system oil
Filter oil
149
motor can apply force in both directions where the rotary actuator can only apply it in one direction. True or False
true
false
150
All waste fluids should be _________
Stored in a properly labeled container
Pour down a drain
Stored in a locked cabinet
Stored in a dry place
151
Some manifolds contain multiple ___valves, each performing different functions such as flow control or pressure control.
- Reservoir
Spin-on
- Cartridge
Strainer
152
A V-belt should ride ____in the groove with its top near the top of the sheave, and does not touch the __of the sheave.
High; bottom
Low; bottom
- High; top
- Low; sides
153
Which fluid lab test indicates the amount and type of wear metals in the fluid?
Fluid additives
Particle count
Spectrometric analysis
Neutralization analysis
154
According to the Lubricator Troubleshooting Chart, if the lubricator is delivering too much oil,what might be the cause?
Lubricator bowl overfilled
Total blockage of the bowl
Clogged pick up tube
Incompatible chemicals
155
How does hydraulic fluid assist with cooling?
By providing lubrication
By preventing leakages
By carrying heat to a heat exchanger
By transmitting power
156
The __________ mount is the most common type used in industry because of ease of mounting.
Non-centerline
centerline
Subplate-mounted
Pivot
157
No oil delivery, delayed oil delivery broken or crazed bowl are four common symptoms that a lubricator is about to fail
Too much oil delivery
Too little oil delivery
Low air pressure
No air pressure
158
A cartridge type filter tends to keep maintenance cost low because only the __________ gets replaced.
Filter element
Filter shield
By-pass valve
None of the above
159
Which of the following is a type of seal on a vane-type rotary actuator?
- A rod seal to prevent external leakage
A seal to prevent leaks between the vane and the body
A shoulder seal between the shaft and the heads
All of the above
160
A __________ is a great tool to help find the cause of a zero system pressure fault.
Troubleshooting table
Fault code display
Troubleshooting flowchart
Open end wrench
161
Which of the following is the second step in the silent chain installation process?
Mount the sprockets
Mount the motor and the driven component
Inspect the sprockets
- Align the sprockets
162
How often should the oil level in a hydraulic system be visually checked?
A or B
Each time the power unit is started
At the beginning of each week
At the beginning of the daily shift
163
An increase in actuator speed indicates which symptom of non-compensated flow control valve failure?
No flow
Restricted reverse flow
Flow rate increase
Flow rate decrease
164
Which of the fault symptoms of flow control valve involves slow actuator speed and check valve in the closed position
Non-adjustable flow
External leakage
Restricted reverse flow
No flow
165
Which of the following is NOT a typical column in a filter troubleshooting chart?
Possible cause
Remedy
Pressure reading
Fault
166
Which of the following is NOT true about cartridge-type filters?
Cartridge-type filters can have a bypass valve
They have a filter element enclosed in a metal shield
Their filter elements can be disposable or cleanable
They are not very durable
167
How does the oil flow through a spin-on oil filter?
From the center through the filter element
Through the filter element to the center
- Through the element on the port side then through the element on the star
- From the center, through the element, back to the center
168
What is the normal operating temperature for petroleum-based hydraulic fluid?
125 °F (52 °C)
135 °F (57 °C)
115 °F (46 °C)
105 °F (41 °C)
169
Which of the vacuum cup failure symptoms involves a small crack or hole in the cup?
Excessive force
No seal
None of the above
Loss of seal
170
The air regulator must follow the air filter, but be installed before the lubricator because why?
It doesn't matter which way they are installed
Regulators do not work well when oiled and can be damaged by small particle
OK to swap the filter+ the lubricator but regulator must stay between them
The regulator in front of the filter would create flow issues
171
True or False: The type of cylinder mount determines the method of installation.
True
False
172
Which of the following is true of timing belt drives?
They are corrosion-free
They are not very reliable
They require a lot of maintenance
They require lubrication
173
How many basic types of V-belt configurations are there
5
3
6
4
174
True or false: A spin on oil filter is used for low pressure applications.
False
True
175
True or false: Pseudo-cavitation is also called ingestion.
True
False
176
A steel rule can be used to check for __________ on a solenoid.
The correct gap
Correct size
Magnetism
Alignment
177
One of the tests to perform when troubleshooting No Actuator Movement symptom is check for incorrect wiring in the pump
False
True
178
the ways to accurately check the fluid level in a hydraulic oil reservoir which of the following is NOT one of those.
Thermometer
Fuel gauge
- Sight gauge
- Dip sticks
179
Flowcharts are based on which troubleshooting method?
Symptom and cause
Half-split
Shotgun
- Output-back
180
A mechanical blockage of a DCV spool can result in __________.
Bubbles in the fluid
Milky fluid appearance
Cavitation
A burned out solenoid
181
What type of tubing can used for high- pressure applications like hydraulic systems as well as low-pressure applications
Reinforced hose
None of the above
Preformed steel
Hose
182
Which troubleshooting method involves measuring near the middle of the circuit to isolate the problem?
Output-back
Symptom and cause
Half-split
Shotgun
183
True or false: NC vacuum switches are more common than NO vacuum switches.
True
False
184
some air can get trapped in the actuator because the oil does not flow continuously across the actuator piston or vane.
True
False
185
What is a gauge fixture designed to do?
- Assure that the measurement is always taken from the same reference point
- Accurately hold the indicator
Accurately position the part
- Both B and C
186
Troubleshooting charts help using five steps including:Identify the symptom,Look up the possible faults, Identify remedy
Identify the motor on the compressor
Identify the amperage draw of the compressor
Identify the filters the compressed air system
Identify the possible cause
187
Fast actuator drift indicates which symptom of pilot-operated check valve failure?
Slow drop-off in checked pressure
- None of the above
Check not opening
Not checking flow
188
feature of hydraulic fluids describes the lowest temperature at which burning can continue for 5 seconds after igniting
Pour point
Flash point
Fire point
Viscosity grade
189
Plumbing leaks in the suction line can occur due to __________, physical damage to the exposed pipes, or a worn seal.
Vibration
Fluid too low
Cracks or leaks in the system
Improper handling
190
According to the Vacuum Cup Troubleshooting Chart what should you check if you are experiencing noisy operation?
Vacuum generator mounting bolts
Loose muffler
Venturi nozzle vane
Wrist pin bearings
191
Electromagnetic brakes use a main brake __________ to engage the brake.
- Lever
Magnet
- Spring
- Spline
192
True or false: The most common sources of zero system pressure are compressors, regulators, filters, and airline leaks.
False
True
193
Which of the following is a common sign of air cylinder failure?
Slow speed
Bouncing stroke or hammering
Fast speed
All of the above
194
If crazing occurs dueto extreme temperatures or incompatible oil,what is the correct course of action regarding the bowl
Change the oil regardless of OEM recommendations
Do nothing, the bowl is fine
Change bowls to another material or use a metal bowl
Change the bowl each time it crazes
195
Wear on the spool, poppet, and the poppet seat can cause what symptom in a pressure-reducing valve?
Slow actuator movement
- Outlet pressure too high
External leakage
- Erratic actuator
196
A complete lockout/tagout program requires that __________ be locked out for servicing or maintenance.
Only electrical power
Only mechanical components
All power sources
Only pneumatic power
197
Inserting a pressure gauge into the pneumatic system using a tee creates a test station or
Tap line
Test point
Bypass
Test zone
198
What is the most popular material for surface plates?
steele
marble
Concrete
Granite
199
True or false: A common way to test for pump overheating is to touch the pump.
False
True

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