Couplings And Alignment

Front 1

What is the basic purpose of a shaft coupling?

Back 1

join the driver and driven shafts together

Front 2

For a given horsepower, increasing the speed of the machine _________ the torque transmitted

Back 2

decreases

Front 3

Which type of mechanical coupling cannot tolerate any misalignment

Back 3

rigid

Front 4

Compression, ribbed, flange face and threaded couplings are classed as ______ couplings

Back 4

Rigid

Front 5

Which type of coupling grips the shaft by compressive forces?

Back 5

compression

Front 6

which type of coupling is constructed with a male and female flange fitted together?

Back 6

flange face

Front 7

What is the main advantage of a flexible coupling over a rigid coupling?

Back 7

they compensate for some misalignment

Front 8

What are the three types of shaft misalignment?

Back 8

parallel offset

angular

combination parallel and offset

Front 9

Which chain coupling is recommended for high torque loads?

Back 9

silent chain

Front 10

The working principle of a gear coupling is similar to?

Back 10

a spline

Front 11

Which coupling offers excellent torsional flexibility?

Back 11

rubber tire

Front 12

Which flexible coupling uses a pair of three jawed hubs?

Back 12

jaw and spider

Front 13

Which types of coupling can be best used where deliberate misalignment exists in the drive?

Back 13

universal joint

Front 14

Allowing the drive to come up to running speed rapidly, then gradually bringing the driven load on the line refers to:

Back 14

centrifugal couplings

soft start characteristics

a method used to reduce high electrical current usage during start up conditions

-all of the above

Front 15

Which coupling provides built in overload protection?

Back 15

fluid

Front 16

Which device is used on a fluid coupling to permit hot oil to escape if excessive overloading occurs?

Back 16

fusible plug

Front 17

Dry fluid couplings use an actuating media of:

Back 17

steel shot

Front 18

Shear pin couplings:

Back 18

mechanically disconnect the driver from the driven machine

Front 19

Improper alignment usually is NOT one of the main causes of machine failure.

Back 19

FALSE

Front 20

The "bending moment" between two shafts identifies:

Back 20

shaft misalignment

Front 21

The machine's bedplate should be checked for distortion and levelness

Back 21

TRUE

Front 22

"Jacking bolts"

Back 22

are used to help correctly position the machine horizontally

Front 23

The centerline of the dial indicator plunger should be positioned to run through the centerline of the shaft

Back 23

true

Front 24

"Soft foot" is the term commonly applied to the condition that exists when all the machine feet ________ supporting the weight of the machine

Back 24

are not

Front 25

To correct for a soft foot condition, insert an amount of shim stock equal to the amount of deflection indicated by the dial indicator reading from:

Back 25

the foot being checked

Front 26

Bending of the dial indicator mounting bar presents significant errors in the dial readings used to align the machinery

Back 26

true

Front 27

indicate where the dial indicator should read from when checking coupling runout when it is believed the coupling's bore is made offset to the coupling itself.

Back 27

off the coupling rim

Front 28

When using the rim and face alignment method, the face dial is used to determine:

Back 28

angular misalignment

Front 29

If an electric motor is coupled to a centrifugal pump handling fluids over 300 degrees F would you add or remove shims at the electric motor to compensate for thermal growth?

Back 29

add

Front 30

When adding shims under a machine's foot, keep the number of shims to _____ or less

Back 30

4