Chapter 01- Vibration Sources & Uses

Question 0

What are the two causes of vibration?

Answer 0

1. Imposed Motions

2. Forces

Question 1

What is vibration?

Answer 1

Vibration is a repetitive motion of a machine or structure about an equilibrium position.

Question 2

How many sources of vibration exist?

Answer 2

Six

Question 4

What are the sources of vibration?

Answer 4

1. Function
2. Inadequate Design
3. Manufacturing Processes
4. Installation
5. Wear & Abuse
6. Faulty Maintenance

Question 5

What are the types of vibration?

Answer 5

1. Harmonic
2. Periodic
3. Impulsive
4. Pulsating
5. Random

Question 6

How many types of vibration are there?

Answer 6

Five

Question 7

Forces

Answer 7

Cause Vibration

Question 8

What are the effects of vibration?

Answer 8

1. Catastrophic Failure
2. Fatigue Failure
3. Loss of product quality
4. Human Annoyance

Question 9

What are the uses of vibration?

Answer 9

1. Acceptance Testing
2. Predictive Maintenance
3. Manufacturing

Question 10

What are Sensors?

Answer 10

Sensors are used to detect vibration.

Question 11

What are Analyzers?

Answer 11

Analyzers are used to quantify the amplitude and frequency of vibrations.

Question 12

What are the Stages of Predictive Maintenance?

Answer 12

1. Monitoring of Change
2. Fault Diagnostics
3. Severity Evaluation

Question 13

Forces and the vibrations that result from forces can be caused by:

Answer 13

1. Poor Quality Machining
2. Assembly Errors
3. Installation
4. Structural and Material Defects
5. Thermal Distortion
6. Lack of Lubrication
7. Unbalance

Question 14

How does poor quality machining cause vibration?

Answer 14

Poor quality machining results in surface defects or grooves that can create high frequency vibrations as a result of non-smooth surfaces.

Question 15

How can assembly errors cause vibration?

Answer 15

Motors assembled with rotors that are not centered in the stator will cause unbalanced electromagnetic forces that excite vibration.