Couplings, Clutches, Brakes, Rim And Face Alignemnt Test Flashcards
3 basic types of couplings are: special purpose, ridged and ________
Flexible
Which of the following is NOT and ridged coupling:
Sleeve
Compression
Threaded
Steel grid
Steel grid
Which type of coupling does not need a key:
Ribbed
Compression
Sleeve
Flange face
Compression
Which statement is NOT TRUE about flexible couplings?
Can take a small amount of misalignment
Can be material flexible or ridged flexible
Can be roller chain or gear coupling
Some may need lubrication
Can be material flexible or ridged flexible
Material flexible couplings:
Allow parts to flex
Have resilient materials
shorter service life then metallic members
All of the above
All of the above
The flexible disc coupling:
Has flexible steel discs that are used in a single or double configuration
Not recommended for high speed and load compared to material flexible couplings
Both 1 and 2 are correct
Both 1 and 2 are correct
When installing a double universal joint, you will have:
The same angles at each joint
The yokes in phase
A spline on the shaft to compensate for relative movement of with machine
All of the above
All of the above
Constant velocity joints (cv):
Are used where joint angles are unequal
Use a rubber boot to protect the unit
Can have needle bearings or ball bearings
All of the above
All of the above
Centrifugal couplings:
Can be fluid or dry shot
Have springs that determine engagement characteristics
Both 1 and 2 are correct
Both 1 and 3 are correct
Floating couplings are used where the drive component cannot be placed close to the drive motor or there is needed space for maintenance.
True or false
True
When selecting a coupling you consider which of the following:
Speed of the unit
Horsepower and torque requirements
Space limitations
All of the above
All of the above
You should ________ when installing couplings?
Check for shaft runout
Allow for axial movement in flexible couplings
Read manufactures instructions
All of the above
All of the above
When pressing on hubs for the couplings make sure to ___________?
Put a stop on the shaft where the hub should slide up to
Clamp or ribbed couplings should be_______?
Installed with keys
Installed with a slight gap between the two halves
Torqued in the proper sequence and to the proper specs
All of the above
All of the above
The hydraulic injection removal method needs holes drilled into the underside to accept hydraulic fitting, a hydraulic pump and __________?
Restraint attached to the shaft so the hub won’t fly off.
When maintaining coupling which of the following will NOT need lubrication?
Chain coupling
Grid couplings
Gear couplings
Brake and wheel coupling
Brake and wheel couplings
Soft start characteristics apply to _______ couplings
Centrifugal
Fluid couplings are never filled more than _______% of their capacity?
80
Threaded couplings are used to _______?
Connect deep well pump shafts
The part of a fluid coupler that is referred to as the pump is the ________?
Impeller
Gear couplings :
Have internal and external teeth
Have curved or straight teeth
Can handle high torque and high rpm’s
All of the above
All of the above
The rubber tire coupling can be changed out easily without removing hubs?
True or false
True
Shear pin couplings :
Have pins that can be tapered or stepped
Have pins that are made of soft materials or have recesses cut into them
Can be an add on feature to most couplings
All of the above
All of the above
When servicing pump couplings, the safety considerations should be:
Close and lock out correct valve to the pump
Purge the pump of its pressure and chemicals
Make sure area is clear before starting the pump
Three types of flexible couplings are chain, elastomeric and ______?
Rubber tire
Single universal joints are classed as a non-constant velocity joint
True or false
True
The 5 types of ridged couplings are:
Sleeve Compression Ribbed Flange faced Threaded
True or false
True
Flange face couplings have a male and female hub.
True or false
True
What type of coupling uses a steady bearing to support the coupling?
Threaded
Synthetic Chain couplings are used for light loads with no lubrication and often in the __________industry.
Food processing
The __________ on the jaw and spider coupling acts as a shock dampener.
Spider
Which coupling has rubber external teeth?
Splined rubber
If a fluid coupling overheats it will melt a fusible plug and _________?
Shut down the electric motor
Engagement characteristics for centrifugal shoe couplings are determined by ________?
Springs
You should not use ridged couplings when there is axial movement or ________?
End float
Metallic disc couplings are used where no _________ is permitted?
Backlash
The offset coupling allows the most offset misalignment (in the flexible coupling group)
True or false
True
If the coupling hub bore had a rippled appearance, this would tell us that there was torsional vibration in the unit.
True or false
True
The bore of a fractured hub shows signs of gulling. This would tell us that the hub was undersized and forced onto the shaft or the hub was cocked when positioned.
True or false
True
When assembling cross and bearing joints you can add grease to the needle bearings to hold the bearing in the cap.
True or false
True
The most common type of misalignment is _________?
Combination
Misalignment can cause equipment damage, loss of production and ________?
Vibration
When using a dial indicator for alignment you will need to check that the dial makes contact through its full turn, the dial indicator plunger does not stick, and ______________?
The dial indicator moved in a positive direction when the plunger is depressed.
When torquing the mounting bolts on a unit it is important you torque to the proper ft/lbs for the type of fastener, use clean shims and Have all mounting surfaces clean and _______________?
Torque in the proper sequence and in 3-4 stages
If the base plate surface is not level for your drive you would have what _______?
Soft foot
When installing new equipment to be aligned with rim and face readings, the machine to be shimmed should have the dials clamped on its shaft and the dials reading off the fixed machine and ____________________?
Be lower than the fixed machine so shims can be added to bring it up to the proper height
Jacking bolts are used to?
Adjust the machine to be moved horizontally and to hold the machine in place while adding shims under the feet
Plastic shims are colour coded for ________, and metal shims are classed by _________?
Thickness
Size
Soft foot can be checked with feeler gauges, laser shaft alignment and _________?
A dial indicator on the foot and base of dial on the baseplate
Runout on a machine shaft or coupling is called_______?
Eccentricity
Dial bar sag can occur with?
Large diameters and long spans
Small diameter and short spans
Measurements in the 12 and 6 o’clock positions
All of the above
All of the above
When you take 4 reading at 90 degrees the vertical readings should equal the __________ readings.
Horizontal (3 and 9 o’clock)
When first moving the machine for alignment you should rough align the machine to within ________ “
.010”
The higher the RPM of the unit the less misalignment the unit can handle.
True or false
True
Elastomeric shims can _________
Correct angular soft foot
Dial bar sag is added to ________ when doing rim and face readings?
The rim dial at the 6 o’clock position
When you can only take 3 of the 4 readings you can ___________ to perform the alignment?
Balance the vertical readings with the horizontal readings
When doing an alignment, you will intentionally misalign the motor when ___________?
There is a change in temperature of the fixed machine or MTBM
To successfully align shafts, you must correct these 2 misalignment conditions?
Angular and offset
Before begging an alignment, check for soft foot, end float,
damaged baseplate and __________?
Bent shaft
Misalignment can be cause by:
Poor misalignment practices
Bearing wear
Thermal growth
Millwrights
All of the above
All of the above
When adding shims under the feet you should:
Keep number of shims to 3/4
Keep the thinner shims in between the thicker ones
Clean the shims, baseplate and feet
All of the above
All of the above
When accurate shaft alignment has been achieved, a condition known as ________ exists?
Collinearity
If two coupling faces have a gap of 40mils at 12 o’clock and 60 mils at 6 o’clock you would shim where?
Shim under the front feet of the motor (MTBM)
Shaft end float or axial movement while using the rim and face method of coupling alignment could cause _______?
Error on the face reading
When you get negative numbers when using formulas for shaft alignment, this means you would move the machine ______________ the datum?
Away from the datum
When using rim and face alignment, angular misalignment is indicated by the dial indicator reading on the _______?
Face
With readings of 0 at the 12 oclock, -9 at the 3 oclock, +1 at the 6 oclock. What would the 9 o’clock reading be?
+10
A positive reading when measuring horizontal moves mean you would move the machine toward the _______?
Datum
If you are torquing down the hood down bolts after adding shims, you have excessive dial movement. The most likely cause is soft foot.
True or false
True
The purpose of a torque limiting clutch is to _________?
Multiplies the torque as the load slows down
Torque limiting clutch will slip because of_________?
Overload
Variable speed sheaves are used to alter pulley ratios while the machine is ________?
Running
Variable speed reducers (including PIV’s) have sheaves that have ______ or ________ on the inside contact surfaces?
Smooth faces
Teeth or grooves
Variable fill scoop tub hydraulic drives change output speeds by __________?
Changing the oil level in the fluid coupling
Disc brakes have better stopping and _______ power than drum brakes of the same diameter.
Holding
A clutch type that is no bi-directional is a
Square jaw
Wrap spring
Torque limiting
Cone
Wrap spring
Spragg and roller ramp clutches are ______ clutches.
Overrunning or one-way
When ordering wide v belts for VSD’s, the first 2 digits in the belt code are width in ________
1/16ths
When installing drives on sole plates, you should make sure the sole plate is atleast as thick as the _____________?
Diameter of the mounting bolts
Self centering sheaves use two movable flanges to keep the belt centred within the drive.
True or false
True
Variable speed chain drives (movable leaves) do not allow for overloads or jam protection.
True or false
True
Closed loop hydrostatic drives have the hydraulic oil directed back to the pump after going through the hydraulic motor and uses a charge pump for returning any leakage oil back to the pump ________
Inlet
In VSD’s of the wet disc type, a servo control thru feedback loop increases or decreases the output speed to the required speed.
True or false
True
PLC’s used with VFD’s have a short payback time because they save a lot of money over conventional equipment.
True or false
True
PIV’s have the chain tensioned by ?
A tensioning shoe
Narrow belt drives are with fixed centres use an adjuster on one pulley that can be adjusted for speeds from 1:1 to 8:1
True or false
True
Wood block belts on VSD’S are used for high torque low speed applications
True or false
True
Optical alignment and levelling procedures are used to solve questions such as :
Level
Flat
Plumb
Straight
To level means to put the baseplate into the same plan as the vertical and ________
Horizontal
Plumb is when the equipment is aligned perpendicular to the horizontal.
True or false
True
Optical lines of site can have errors such as:
Reflection
Refraction
And ____________
A difference in vapour pressure inside the vial
When light is passed from glass to air, the light is always refracted _________ the normal?
Toward
Or
Away from
Away from
Convex lenses ___________light rays and concave lenses ____________ light rays?
Focus
Disperse
Pentaprisms are designed to have refracted rays leave at 90 degrees
Not reverse the image coming through it
And ____________
Create a perfect square angle
Precision targets used with an optical micrometer and a vernier Cale can be accurate to .0001”
True or false
True
Lateral adjusters are used to buck in on targets.
True or false
True
When obtaining an accurate reading with an alignment scale (rod), you would rock the rod back and forth inline with the alignment transit and using the ________ reading
Shortest
Alignment bar systems are used for precision measuring over 100’
True or false
True
Jig transits can align and establish vertical and _________ planes
Horizontal
Bucking in is the process of aligning an optical tool onto two targets at the same time.
True or false
True
Theodolites are used to measure angles in the vertical and ________ planes
Horizontal
An optical plummet on the theodolite will help you___________?
Position the unit over a survey point
When using vertical wire alignment, to keep the wire from moving from wind you would submerse a finned weight in a bucket of oil.
True or false
True
When using horizontal wire alignment to set the main bearing in an engine block you would use a specific wire diameter with a specific weight and use a wire sag chart for the wire diameter and weight to find the appropriate sag values
True or false
True
Foundations should be poured to a _________ elevation than the bottom surface of the machine being installed.
Lower
Class 2 laser transmitters are considered very safe.
True or false
True
Straightness measurement can be checked at up to 10 locations when using a laser level.
True or false
True
When setting up to check parallelism with lasers, you will need a minimum of ________ tripods
2
Construction grade lasers have a accuracy of _______ per. 100’
1/4”
Rotating head lasers can level manually or automatically up to ________ degrees
360
You can use tilting levels, transits and _________ to shoot level
Theodolites
Alignment telescopes are used in place of wire alignment to establish straight reference lines of sight.
True or false
True
When tilting levels are used you will rough align with fish eye and will precision level with coincidence level or _________ level
Automatic
Most precision instruments need to operate between _______ and ________ and be _________ to ensure accurate readings.
-20 degrees c
50 degrees c
Acclimatized
Always take level readings 1/2 way between the backsite target and the foresight target to ensure accuracy.
True or false
True
When leveling optical levels with the 3 leveling screws, the bubble always moves toward any screw being turned in a _________________ direction.
Clockwise
To check the coincidence level is in adjustment, you will turn the telescope _________ degrees?
180 degrees
When focusing the tilting level, the eye piece should be focused first, before taking readings and then focus on the object. When the cross hairs will not move in relation to the object then the focus is correct.
True or false
True
When taking readings on a bed plate with a tilting levels, you get 3 reading La of .011”, 0.021” and .016” at 3 different locations. What reading will have to be raised the most?
.021”
