Ekstra Vrae

Question 1

List 5 types of corrosion

Answer 1

Cavitation correction
Corrosion fatigue
De- alloying corrosion
Fretting corrosion
Erosion corrosion

Question 2

Name 4 heat treatment measuring devices

Answer 2

Thermocouples
Contact pyrometers
Indication crayns
Thermometer

Question 3

What is a wps

Answer 3

IT is a document which gives directions to the welding operations on how to successfully complete production welds according to code requirements

Question 4

List 10 items on a wps

Answer 4

Date
Dimensions
Position
Joint type
Process
Polarity
P numer
F number
Interpass temp
Pre heat temp

Question 5

What is a PQR

Answer 5

Is a document which document all the activities during the welding of a test coupon and test results. It should also document all the essential variables and other information required by the code

Question 6

Whats the difference between quality control and quality assurance

Answer 6

Quality control: is the physical action that is necessary to ensure quality has been achieved on a given product
Quality Assurance: is a management system that provides confidence that the leve of quality has been achieved with the least expenditure

Question 7

The effect of alloying elements
Chromium, cobalt, molybdenum, vanadium

Answer 7

Chromium: strength, hardness, corrosion resistance
Colbalt: high strength en high hardness
Molybdenum: hardness endurance limits
Vanadium: controls grain size