341

Question 1

You can control chain tension in a chain drive by changing shaft centers or using an ____ sprocket

Answer 1

Idler

Question 2

A roller chain should be allowed to sag ____ percent of the distance between sprocket centers

Answer 2

About 2

Question 3

In chain operations the area of greatest load are the

Answer 3

Chain joints

Question 4

You should make your first full scale inspection of a new drive chain after ____ hours of operation

Answer 4

24

Question 5

Chain side plates that show signs of uneven wear usually indicate that the

Answer 5

Drive is misaligned

Question 6

In a vertical chain drive without and idler the shafts should be installed at an angle of no more than

Answer 6

60 degrees

Question 7

The most common cause of chain drive failure is

Answer 7

Improper lubrication

Question 8

Which of the following describes the Type III lubrication method?

Answer 8

Splash

Question 9

A scrapping or slapping noise during a test run of a chain drive may indicate that

Answer 9

The chain is striking something

Question 10

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

Answer 10

Clean it with solvent

Question 11

After mounting sheaves and pulleys you should check their alignment with a

Answer 11

Straightedge

Question 12

The best way to tighten a v belt that has stretched is to

Answer 12

Adjust the distance between sheaves

Question 13

A splice commonly used on low speed flat belts is the ____ splice

Answer 13

Stepped

Question 14

If a new flat bell is running well how long should you test run it under normal load.

Answer 14

48 hours

Question 15

A burned spot on a belt probably indicates that

Answer 15

The belt is overloaded

Question 16

What type of belt is installed on sheaves rather than on pulleys

Answer 16

V belt

Question 17

If a v belt in a multi belt drive shows wear you should

Answer 17

Replace the full set of belts

Question 18

Which of the following is the correct way to check a V belts tension

Answer 18

Apply a specific amount of force to the top side of the belt

Question 19

Which of the following is the best way to take up slack in a flat belt

Answer 19

Adjust the center distance

Question 20

The pulleys for a positive drive belt have an

Answer 20

Flange in each side

Question 21

Which of the following drives permits practically no misalignment of the shaft

Answer 21

Gear

Question 22

The critical dimension that ensures accurate meshing of a work and work gear is its

Answer 22

Distance between the centers

Question 23

When mounting spur of helical gears that have only one hub you should position the hub

Answer 23

Away form the bearing

Question 24

When cracked or broken areas appear on great teeth that are almost new the cause is probably

Answer 24

Foreign object

Question 25

It the metal at the tips and roots of gear teeth has been gouged or worn, the cause is probably

Answer 25

To tight of a fit between gears

Question 26

Which of the following happens to the open gearing during the run in period

Answer 26

Gears become pitted

Question 27

The DP of a gear is the ratio of the number of teeth to the ___ in inches

Answer 27

Pitch diameter

Question 28

Which of the following is used to check gear alignment after installation

Answer 28

Steel square

Question 29

What should you do if spalling occurs in a open gear drive

Answer 29

Heat treat the teeth

Question 30

Which of the following is the best solution for hearing with cracked rims

Answer 30

Replace the gear

Question 31

When installing an enclosed gear drive on the floor you should mount the feet on the

Answer 31

Steel based pads

Question 32

What component of an enclosed gear drive prevents the buildup of pressure or the formation of a vacuum inside the drive housing?

Answer 32

Breather

Question 33

If an enclosed gear drive is to be stored in the plant for a long time, you should

Answer 33

Fill the drive completely with oil

Question 34

Most unusual noises that develop after an enclosed gear drive has run a while onginate in the

Answer 34

Shaft bearings

Question 35

What does discoloration of worm gear teeth indicate?

Answer 35

Burning caused by overloading

Question 36

Which tool is used to check the levelness of an enclosed gear drive on its foundation?

Answer 36

Spirit level

Question 37

Which is the most common method of lubrication for bearings on enclosed gear drives?

Answer 37

Splash

Question 38

During the run in period, you should run the drive system at half load for ____ hr

Answer 38

8 to 10

Question 39

After a gear drive's first week of operation under full load, you should

Answer 39

Check the oil level

Question 40

Which of the following is found on the nameplate of an enclosed gear drive?

Answer 40

Load capacity

Question 41

Which element of a drive package should you move to set the coupling gap?

Answer 41

Motor

Question 42

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

Answer 42

Dial indicator

Question 43

The onty kind of couplings that require lubrication are those that have

Answer 43

Metal to metal contact

Question 44

A floating shaft coupling should be used when the

Answer 44

Drives exert axial thrust

Question 45

if the power requirements of a driven machine have been changed so that overloading occurs, you can solve the problem by installing (the) (a)

Answer 45

Next large coupling

Question 46

A coupling can serve all of the following purposes except

Answer 46

Insulate against high temperature

Question 47

The gap between a spacer coupling and the hubs should be ___ in

Answer 47

0

Question 48

What is the usual cause of whipping on a floating shaft?

Answer 48

Excessive misalignment

Question 49

An uneven wear pattern on a gear-type coupling is usually a sign of

Answer 49

Misalignment

Question 50

The slack in the fit between coupling components is known as

Answer 50

Backlash