Deck 30: Mechanical PM

Question 1

Rusting surfaces are an indication of ____.

A) old age
C) oxidation
B) rusting
D) moisture

Answer 1

D

Question 2

What is an early indication that a bearing may be overheating?

A) solid or caked lubrication
C) etched raceways
B) rust
D) pitting

Answer 2

A

Question 3

The most common problem with chain drives is that the chains are not checked and ____________________ often enough.

Answer 3

lubricated

Question 4

Failure of rigid couplings is usually indicated by a small pile of __________________ on the floor just below the coupling assembly.

Question 5

What is the leading cause of coupling wear?

A) misalignment
C) bad fillers
B) lack of attention
D) overloading

Question 6

When should a radial lip seal be replaced? Choose the best answer.

A) When it is discolored
C) Every 6 months
B) When it has nicks and/or small cuts
D) Only when it is leaking

Question 7

Bearing failure is generally caused by a lack of ___________________ or overloading

Question 8

What type of bearing should be used in a dirty environment?

A) roller bearing
C) sealed bearing
B) needle bearing
D) plain bearing

Question 9

The two most common types of couplings are ___________________ and flexible.

Question 10

What does it mean if the oil has a metallic look when you open a gearbox?

A) bad seals
C) worn gears
B) deteriorating bearings
D) bad oil

Question 11

What causes the tension members to break in a V-belt or a positive-drive belt?

A) overloading
C) old age
B) overheating
D) stretching

Question 12

Gearboxes contain _____ to keep the gears lubricated and cooled.

A) grease
C) padding material
B) oil
D) straw

Question 13

The pulley should be changed when the the V-belt has dropped ____ into the pulley.

A) 1/32 inch
C) 1/8 inch
B) 1/16 inch
D) 1/2 inch

Question 14

On inspection, it is noticed that a seal has a slight amount of leakage. For what type of seal would this be desirable?

A) The O-ring
C) The radial lip seal
B) The mechanical seal
D) The packing seal

Question 15

What is compromised when a positive-drive belt begins to skip?

A) tooth integrity
C) positive traction
B) pulley performance
D) belt integrity