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.

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Multiple choice questions
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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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EMAR102: Materials Test 1

Materials Test 1: EMAR102 Quiz

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