Tpc 341

Question 1

You can control chain tension in a chain drive by changing shaft centers or using a(n)?

Answer 1

Idler sprocket

Question 2

A roller chain should be allowed to sag how much?

Answer 2

2% of the sprocket center distance

Question 3

In chain operations the areas of greatest load are?

Answer 3

Chain joints

Question 4

You should make your first full scale inspection of a new chain drive after how long?

Answer 4

After 24hrs of operation

Question 5

Chain side plates that show uneven wear usually indicates that the…

Answer 5

Drive is misaligned

Question 6

In vertical drives without idlers the shafts should be installed at an angle of no more than…

Answer 6

60 degrees

Question 7

The most common cause of drive chain failure is…

Answer 7

Improper lubrication

Question 8

What is type III lubrication?

Answer 8

Splash lubrication

Question 9

A striking or slapping noise during a test run of chain drive may indicate?

Answer 9

The chain is striking something

Question 10

Before using chain that has been stored on open reels you should?

Answer 10

Dip it in solvent

Question 11

After mounting the driving and driven sheaves or pulleys, check their alignment with a?

Answer 11

Straightedge

Question 12

What is the best way to tighten a V-belt and take up the stretch due to normal wear?

Answer 12

Make the distance between the shaft centers adjustable

Question 13

What splice is the stiffest and used mostly on low speed belts?

Answer 13

Stepped splice

Question 14

When test running a belt how long should you run it for?

Answer 14

Operate the drive under normal load for 48hrs

Question 15

What does a burned spot indicate?

Answer 15

It indicates the belt has been overloaded

Question 16

On v-belt drives the components that contact the belt are called?

Answer 16

Sheaves

Question 17

Should you replace all belts on a multi belt drive system at the same time?

Answer 17

Yes

Question 18

How can you check a belts tension?

Answer 18

By applying a specific amount of force on the top side of the belt and measuring the deflection

Question 19

What is the best way to take up slack in flat belts?

Answer 19

To adjust the center distance

Question 20

How do positive drive belt pulleys keep the belt centered?

Answer 20

The pulleys have a flange on each side

Question 21

Do gears permit any misalignment?

Answer 21

Gears practically permit no misalignment at all

Question 22

What is the critical dimension for a worm gears?

Answer 22

Center distance between the worm and gear

Question 23

If you are going to mount spur or helical gears that have only one hub where should you position the hub?

Answer 23

Away from the bearing

Question 24

Check the teeth for cracked or broken areas, when these appear on gears that are almost new the cause is probably?

Answer 24

A foreign object that was dragged through the meshing point

Question 25

What is an indication of the gears being too tight?

Answer 25

The tips of the gear teeth and roots being gouged or worn

Question 26

During the run in period a set of gears will?

Answer 26

Polish up as their minor defects smooth out

Question 27

What is diametral pitch?

Answer 27

The ratio of the number of teeth to the number of inches of pitch diameter

Question 28

How can you check gear alignment?

Answer 28

Set a steel square on the shaft and hold it against the side of the gear

Question 29

What is the solution to spalling

Answer 29

Either reduce the load or to increase the surface strength of the teeth by heat treating them

Question 30

Best solution for gearing with cracked rim?

Answer 30

Order or make a replacement gear

Question 31

When floor mounting what must be used to contact the machined surfaces of the housing feet?

Answer 31

Steel base pads

Question 32

In housings what prevents the buildup of pressure or the formation of a vacuum inside the housing and assists the flow of lubricants?

Answer 32

A breather

Question 33

When storing a housing for a long period of time what should you do?

Answer 33

Keep the drive completely filled with a suitable oil

Question 34

Where do most noises originate from after a drive runs for awhile?

Answer 34

They originate from the shaft bearings

Question 35

In worn gear drives discoloration of the gear teeth indicates burning, this is caused by?

Answer 35

Overloading the teeth

Question 36

How should you check the levelness of the drive of enclosed gears on the foundation?

Answer 36

By using a spirit level

Question 37

The most common method to lubricate the bearings of an enclosed gear drive is by?

Answer 37

Splashing

Question 38

When test running the drive how long should you let it run for?

Answer 38

Let it run at a half load for 8-10 hours

Question 39

After a gear drives first week of operation under full load stop the drive and check what?

Answer 39

The oil level

Question 40

Which of the following is on the nameplate of enclosed gear drives?

Answer 40

Load capacity

Question 41

Which elements of drive packages should you move to set coupling gap?

Answer 41

The motor

Question 42

What instrument is used when precise coupling alignments must be made?

Answer 42

The dial indicator

Question 43

The only kind of couplings that require lubrication are?

Answer 43

Metal to metal contact couplings

Question 44

Floating shaft couplings should be used when drives exert what kind of force?

Answer 44

Axial thrust loads

Question 45

If change has been made in the driven machines power requirements what might you need to do if overloading occurs?

Answer 45

Solve the problem by installing the next larger coupling

Question 46

A coupling can serve all purposes except to?

Answer 46

Insulate against high temps

Question 47

The gap between a spacer coupling and hubs should be?

Answer 47

0 inches

Question 48

The cause for whipping of the floating shaft is usually?

Answer 48

Excessive misalignment

Question 49

If a wear patten is uneven on a gear type coupling it’s usually a sign of?

Answer 49

Misalignment

Question 50

The slack in the fit between coupling components is called?

Answer 50

Backlash