EMAR102: Materials Test 1

Generate an image of a materials testing laboratory with various metal samples, testing equipment, and engineers at work, showcasing concepts of material properties and engineering.

Materials Test 1: EMAR102 Quiz

Test your knowledge on material properties and processes in the field of engineering with our EMAR102 quiz. This engaging quiz covers various topics including yield stress, materials classification, and corrosion protection.

Take the quiz to deepen your understanding and reinforce your learning!

  • Multiple choice questions
  • Score your knowledge on material science
  • Learn while you compete!
10 Questions2 MinutesCreated by TestingSteel52
What is meant by the yield stress of a material?
The stress that will produce a permanent change in the material shape
The point at which the material undergoes a ductile to brittle transition
The point at which a material fractures under test conditions
This is the same as the ultimate tensile strength of the material
Classification societies approve steels for shipbuilding, with a major consideration being:
The sodium content of the steel
The density of the steel
The sulphur content of the steel
All of the other 3 answers are correct
The upper critical range of a material depends upon:
The heat the material can take before melting
The transition point of the material
The requirement not to induce too much stress in the material
The varying carbon content of the material
The nitriding process is often preferred to the case hardening process because:
It is a much quicker process
There is a more gradual change, thus less risk of the case coming off
The equipment needed for this process is much simpler
The depth of the case is more suited to the application
The addition of nickel to a material's composition:
Improves the strength and erosion resistance of the material
Improves the fatigue resistance of the material
Improves the toughness of the material
Induces self-hardening properties from the material
Fretting of a material comes about because of:
Material fatigue
Inadequate clearances between components
Having two components that are loaded having movement between them
Insufficient lubrication between the components
In the nobility table of materials:
Copper is a more noble material than cast iron
Cast iron is a more noble material than copper
It can be seen that mild steel can be used to protect a zinc structure
It can be seen that the most noble materials are the ones that require the most protection
The carbon content range for cast iron is:
0% to 2%
2% to 4%
0,4% to 1,7%
There is no carbon content in cast iron
Impressed current cathodic protection systems serve to:
Provide for a negative potential at the hull, thus limiting corrosion
Make the hull the cathode of an electrical cell
Supplement the passive zinc anodes on the hull
All of the answers are correct
Radiographic thickness testing:
Is a process that can determine flaws in a material up to 180mm thick
Is a process whereby the material thickness is not a factor
Is a process that can be easily carried out on board
Is also referred to as ultrasonic thickness testing
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