TPC 341

Question 1

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

A.) Floating
B.) Idler
C.) keyed
D.) Split

Answer 1

B.) Idler

Question 2

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

A.) about 2
B.) about 3
C.) about 5
D.) exactly 5

Answer 2

A.) about 2

Question 3

In chain operations, the areas of greatest load are the?

A.) chain joints
B.) shaft centers
C.) sideplates
D.) sprockets

Answer 3

A.) Chain joints

Question 4

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

A.) 24
B.) 48
C.) 96
D.) 144

Answer 4

A.) 24

Question 5

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

A.) chain has been stretched
B.) drive is misaligned
C.) lubrication is inadequate
D.) pitch of the mating sprockets has changed

Answer 5

B.) drive is misaligned

Question 6

In a vertical chain drive without an idier, the shafts should be installed at an angle of no more than ___ degrees.

A.) 60
B.) 70
C.) 75
D.) 80

Answer 6

A.) 60

Question 7

The most common cause of drive chain failure is?

A.) improper lubrication
B.) misalignment
C.) too much sag
D.) worn sprocket teeth

Answer 7

A.) improper lubrication

Question 8

Which of the following describes the Type Ill lubrication method?

A.) drip
B.) force feed
C.) manual
D.) splash

Answer 8

D.) splash

Question 9

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

A.) a link has been broken
B.) a shaft seal is loose
C.) the casing is loose
D.) the chain is striking something

Answer 9

D.) the chain is striking something

Question 10

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

A.) blow it with compressed air
B.) clean it with solvent
C.) lubricate it with grease
D.) smooth it with emery cloth

Answer 10

B.) clean it with solvent

Question 11

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

A.) feeler gauge
B.) framing square
C.) spirit level
D.) straightedge

Answer 11

D.) straightedge

Question 12

The best way to tighten a V-belt that has stretched is to

A.) add an idler sheave
B.) adjust the distance between sheaves
C.) shrink the belt
D.) use larger sheaves

Answer 12

B.) adjust the distance between sheaves

Question 13

A splice commonly used on low-speed flat belts is the ___ splice

A.) laced
B.) skived
C.) stepped
D.) wrapped

Answer 13

C.) stepped

Question 14

If a new flat belt is running well, how long should you test run it under normal load?

A.) 8 hours
B.) 24 hours
C.) 48 hours
D.) 96 hours

Answer 14

C.) 48 hours

Question 15

A burned spot on a belt probably indicates that

A.) contaminates are on the belt cover
B.) lubricant is leaking on the belt
C.) the belt is over loaded
D.) the belt is too hot

Answer 15

C.) the belt is over loaded

Question 16

Which type of beit is installed on sheaves rather than on pulleys?

A.) flat belts
B.) timing belt
C.) u-belt
D.) v-belt

Answer 16

D.) v-belt

Question 17

If a V-belt in a multi-belt drive shows wear, you should

A.) add idler sprocket to increase belt life
B.) replace the full set of belts
C.) replace the worn belt only
D.) rotate the belt positions

Answer 17

B.) replace the full set of belts

Question 18

Which of the following is the correct way to check a V-belt’s tension?

A.) Apply a specific amount of force to the bottom side of the belt
B.) apply a specific amount of force to the top side of the belt
C.) run the belt at half load
D.) run the belt at maximum speed

Answer 18

B.) 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?

A.) add an idler pulley
B.) adjust the center distance
C.) change the fastener type
D.) shorten the belt

Answer 19

B.) adjust the center distance

Question 20

The pulleys for a positive-drive belt have a(n)

A.) adjusting cap screw
B.) flange on each side
C.) grooved side
D.) smooth pulley surface

Answer 20

B.) flange on each side

Question 21

Which of the following drives permits practically no misalignment of the shafts?

A.) chain
B.) flat belt
C.) gear
D.) v-belt

Answer 21

C.) gear

Question 22

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

A.) angle between the shafts
B.) distance between the centers
C.) incline of the worm
D.) thread ratio

Answer 22

B.) distance between the centers

Question 23

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

A.) against the spacer
B.) against the bearing
C.) away from the bearing
D.) away from the hubs of any other gears

Answer 23

C.) away from the bearing

Question 24

When cracked or broken areas appear on gear teeth that are almost new, the cause is probably (a)

A.) foreign object
B.) shaft misalignment
C.) too much lubricant
D.) too tight a fit between gears

Answer 24

A.) foreign object

Question 25

lf the metal at the tips and roots of gear teeth has been gouged or worn, the cause is probably (a) A.) foreign object B.) contaminated lubricant C.) shaft misalignment D.) too tight a fit between gears

Answer 25

D.) too tight a fit between gears

Question 26

Which of the following happens to open gearing during the run-in period? A.) backlash increases B.) gears become pitted C.) gears polish up D.) noise level increases

Answer 26

C.) gears polish up

Question 27

The DP of a gear is the ratio of the number of teeth to the ___ … in inches. A.) chordal thickness B.) pitch circle C.) pitch diameter D.) width of the tooth

Answer 27

C.) pitch diameter

Question 28

Which of the following is used to check gear alignment after installation? A.) spirit level B.) steel rod C.) steel square D.) straight edge

Answer 28

C.) steel square

Question 29

What should you do if spalling occurs in an open gear drive? A.) clean the lubricant B.) heat treat the teeth C.) install a guard D.) polish the root fillets

Answer 29

B.) heat treat the teeth

Question 30

Which of the following is the best solution for gearing with cracked rims? A.) modify the lubricant B.) reduce the gear speed C.) reduce the load D.) replace the gear

Answer 30

D.) replace the gear

Question 31

When installing an enclosed gear drive on the floor, you should mount the feet on (the) (a)? A.) floor itself B.) resilient plastic pads C.) steel base pads D.) support plate

Answer 31

C.) steel base 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? A.) breather B.) oil fill pipe C.) pressure equalizer D.) vacuum vent

Answer 32

A.) breather

Question 33

if an enclosed gear drive is to be stored in the plant for a long time, you should A.) dry the shaft seals thoroughly B.) empty the oil from the housing C.) fill the drive completely with oil D.) wrap the bearing seats with dry rags

Answer 33

C.) fill the drive completely with oil

Question 34

Most unusual noises that develop after an enclosed gear drive has run a while originate in the? A.) chain sprockets B.) gears C.) shaft bearings D.) sheaves and belts

Answer 34

C.) shaft bearings

Question 35

What does discoloration of worm gear teeth indicate? A.) bearing failure B.) burning caused by overloading C.) contaminates in the lubrication D.) misalignment of the worm and gear

Answer 35

B.) burning caused by overloading

Question 36

Which tool is used to check the levelness of an enclosed gear drive on its foundation? A.) framing square B.) spirit level C.) steel rod D.) straightedge

Answer 36

B.) spirit level

Question 37

Which is the most common method of lubrication for bearings on enclosed gear drives? A.) drip B.) manual C.) splash D.) spray

Answer 37

C.) splash

Question 38

During the run-in period, you should run the drive system at half load for ____ hr. A.) 1 to 2 B.) 2 to 4 C.) 4 to 6 D.) 8 to 10

Answer 38

D.) 8 to 10

Question 39

After a gear drive's first weck of operation under full load, you should A.) check the bearings for excessive heat B.) check the oil level C.) measure the load at the output shaft D.) retighten the hold-down bolts

Answer 39

B.) check the oil level

Question 40

Which of the following is found on the nameplate of an enclosed gear drive? A.) load capacity B.) maintenance ID number C.) operating temperature D.) pitch diameter

Answer 40

A.) load capacity

Question 41

Which element(s) of a drive package should you move to set the coupling gap? A.) coupling hubs B.) driven machine C.) motor D.) shafts

Answer 41

C.) motor

Question 42

What instrument is used when very precise coupling alignments must be made? A.) caliper B.) dial indicator C.) feeler gauge D.) spirit level

Answer 42

B.) dial indicator

Question 43

The only kind of couplings that require lubrication are those that have? A.) metal to metal contact B.) metal to neoprene contact C.) no load D.) “soft” center members

Answer 43

A.) metal to metal contact

Question 44

A Roating shaft coupling should be used when the? A.) drives exert axial thrust B.) coupling gaps must be very precise C.) motor cannot be removed D.) shafts are seriously misaligned

Answer 44

A.) 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)? A.) metallic center coupling B.) new lubricant C.) next larger coupling D.) non metallic center coupling

Answer 45

C.) next larger coupling

Question 46

A coupling can serve all of the following purposes except A.) compensate for misalignment B.) dampen vibration C.) insulate against high temperature D.) transmit power

Answer 46

C.) insulate against high temperature

Question 47

The gap between a spacer coupling and the hubs should be ___ in. A.) 0 B.) 0.005 C.) 0.05 D.) 0.5

Answer 47

A.) 0

Question 48

What is the usual cause of whipping on a floating shaft? A.) excessive load B.) excessive misalignment C.) gear spalling D.) inadequate lubrication

Answer 48

B.) excessive misalignment

Question 49

An uneven wear pattern on a gear-type coupling is usually a sign of? A.) excessive heat B.) heavy load C.) inadequate lubrication D.) misalignment

Answer 49

D.) misalignment

Question 50

The slack in the fit between coupling components is known as A.) backlash B.) float C.) gap D.) pitch

Answer 50

A.) backlash