couplings self test questions Flashcards

1
Q

couplings are used to connect shafts that are end to end ?

A

true

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2
Q

compressing couplings use keys to transfer torque between hubs and shafts ?

A

false
grip the shaft by using tapered sleeves in tapered hubs

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3
Q

flange face couplings have male and female hubs?

A

true

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4
Q

gear couplings with straight teeth are a good example of rigid couplings

A

false
gear couplings are mechanical flexible couplings

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5
Q

rubber tire couplings can be clamped in place or may have rubber bonded to the coupling ?

A

false

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5
Q

a rubber tire coupling can accommodate axial movement angular and offset alignment conditions ?

A

true

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6
Q

the coupling that can accommodate the most offset misalignment is the single flexible disk ?

A

false

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7
Q

a curved tooth gear coupling has both material and mechanical flexibility ?

A

false
just mechanical flexibility because of clearance between the teeth and shape of the teeth

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8
Q

jaw and spider couplings are mainly used for high power drives that require no shock dampening

A

fasle
used on small to medium HP

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9
Q

steel grip couplings and chain couplings require lubrication

A

true

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10
Q

pin and rubber bushings can accomodate substation axial float?

A

true

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11
Q

universal joins are best kept in accurate alignment for long service life

A

false

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12
Q

single universal joints can only accomodate small angular misalignment

A

true

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13
Q

constant velocity joints (cv joint)
are more versatile than universal joints

A

true

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14
Q

fluid couplings have an out put member called an impeller

A

false
out put is the turbine
input is the impeller

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15
Q

the speed of engagement on a centrifugal coupling can easily be changed ?

16
Q

fluid couplings have maximum vortex flow with in the coupling at start up

17
Q

dry shot couplings should ne filled with the correct level of hydraulic oil and never overfilled ?

A

false filled with heat treated steel shot

18
Q

the sheer pin in a shear pin coupling fails when the coupling is subject to overload or severe shock load ?

19
Q

floating shaft couplings are used to save space ?

A

false
used when drive components can not be located close to the driving motor

20
Q

when a machine needs to be held at rest or stopped quickly a brake wheel coupling is a good choice ?

21
Q

Misalignment is the greatest cause of coupling wear and destruction

22
Q

All coupling should be well lubricated after installation

23
Q

a flexible coupling that is hot after running for a few hours may have serious alignment problems

24
true or false Flexible couplings can be mechanical flexible, material flexible and a combination of material and mechanical flexibility
true
25
If you need a chain coupling for heavy loads and speeds up to 5000 rpm you would use a
silent chain coupling
26
______on gear couplings help allow for more misalignment then straigth teeth. They are good for high torque and high rpm.
curved teeth
27
_______ couplings are the easiest to install but you may have to install press or shrink fit couplings also. When heating couplings heat hubs to approximately _____ above Ambiant temperature for every 0,001”of interference per inch of hub diameter
clearance fit 180 f
28
When removing a coupling hub make sure to heat the hub quickly and evenly . If done slowly the shaft will be heated and expand causing drag on the coupling. When removing any hub with a puller make sure to take out all set screws as they can be dragged across the shaft causing metal build up and stopping the hub from coming off.
29
Make sure to use proper bolts and parts for all coupling replacements. This will help keep the coupling?
balanced
30