4: Performing Quality Inspections

Question 1

Describe a Standard:

Answer 1

A point of comparison, usually of what’s best or good, and detail common minimum conditions.

Question 2

Describe a Procedure:

Answer 2

Set of instructions on how to perform an inspection and describe work scope and areas of inspection. May recommend specific equipment in certain situations.

Question 3

What are Techniques?

Answer 3

Like procedures but more specific. Usually apply to specific products and equipment.

Question 4

What are Specifications?

Answer 4

Provides minimum acceptance criteria and details which conditions are accepted and rejected.

Question 5

What is a Code?

Answer 5

Similar to specifications, differ in nature of job they describe. When an inspection is required by a legal authority or regulator, it becomes a code.

Question 6

What is the first step in any inspection regarding the documents?

Answer 6

Check for currency: date and revision number (if applicable)

Question 7

What does the term “work scope” generally mean?

Answer 7

Generally refers to what we are going to inspect but sometimes can refer to how the inspection will proceed

Question 8

What are the four parties involved in the construction and certification of a particular item?

Answer 8

Owners, construction contractors, inspectors and regulatory body that makes the rules about safety

Question 9

The agreement between who and who is the most important consideration when identifying what needs to be inspected and how it should be carried out?

Answer 9

Your employer and the equipment owner

Question 10

When dealing with organic contaminants such as dirt, dust and soils… what cleaning options work best?

Answer 10

Water
Water and solvent
Pressure washers or sprayers

Question 11

When dealing with oil and grease contaminants, there are 4 methods that work best…

Answer 11

Liquid form solvents ex. Brake cleaner

Soap and water

Steam

Acids for pickling (or etching)

Question 12

Metals containing nickel (such as: stainless steel, inconel, monel, hastelloy) can begin to crack after using what 2 types of cleaners?

Answer 12

Halogenated and chlorinated cleaners.

These cleaners can also affect titanium alloys

Question 13

Aluminum alloys may become corroded after using what type of cleaners?

Answer 13

Phosphates and alkaline cleaners.

Especially at elevated temperatures

Question 14

Acids used for cleaning can cause what type of cracking?

Answer 14

Hydrogen cracking

Question 15

If a harsh blasting operation is used to remove contaminants from a material, what might you need to do prior inspection?

Answer 15

Use and acid etch or pickling operation to remove the fine layer of smeared material from surface.

Question 16

Which industry standard will you find a clear answer on which chemical or abrasive cleaners are appropriate and how to use them?

Answer 16

American Society for Testing and Materials (ASTM)

Question 17

What are the 3 critical steps to correctly prepare for an inspection?

Answer 17

1. Identify and understand the work scope
2. Identify resources that can be used during the inspection
3. Prepare the surface

Question 18

What is ambient light?

Answer 18

Light around the inspection that is not added for the purpose of inspection.

ALWAYS use supplemental light even if ambient light levels meet requirements

Question 19

What is the main purpose of supplemental lighting?

Answer 19

Make sure minimum lighting requirements are met.

Question 20

Why have light emitting diodes (LEDs) become popular in flashlights?

Answer 20

Because of their durability and efficiency

Question 21

How are some of the wavelengths “shifted” from a pale blue to more yellow in colour on the LED?

Answer 21

A phosphorus coating on the LED

Question 22

The ASME Boiler and Pressure Vessel Code states what about angle of viewing?

Answer 22

1. Eye must be closer than 25 inches (not so close that the eye can’t focus)
2. Not less than 30 degrees measured from the inspection surface

Question 23

Polarizing filters can be used to control what?

Answer 23

Scatter and glare

Question 24

What is the focal length?

Answer 24

The point at which the image is optimally focused

Question 25

How is depth of field related to the magnifier power?

Answer 25

Larger the power, shorter the depth of field

Question 26

The highest magnification used in hand-held inspection lenses is around what?

Answer 26

20X

Question 27

What level of magnification are typically classed as “pocket microscopes?”

Answer 27

Greater than 25X

Question 28

Why is it important to have an understanding of the metal alloy being inspected before starting the inspection?

Answer 28

The nature of certain flaws may vary from alloy to alloy

Question 29

The best source to determine what the appropriate cleaning method would be is..

Answer 29

A current procedure accepted by in charge personnel.

Question 30

When using phosphate cleaners and hot water or steam to clean parts, what type of alloy is most likely to suffer sever erosion/corrosion damage due to the cleaning process?

Answer 30

Aluminum alloys

Question 31

What tools and instruments would be the most useful for locating and sizing corrosion indications?

Answer 31

Flashlight, ruler, pit gauge/dial indicator

Question 32

What information is important to consider when deciding what the indication is?

Answer 32

How the part was made and if it was in service or not

Question 33

The distal lens of a fiberscope focuses light where?

Answer 33

At the objective end

Question 34

Mirrors are considered what type of inspection method?

Answer 34

An indirect inspection method and are unintuitive to work with.