01
True or false
1 point
True or false: Brittle fracture can propagate with little visible deformation, so it may provide limited warning before a part separates.
Free Practice Quiz Question List
08 Material Failure and Durability Online Quiz Questions
Use this free practice quiz with 20 questions to review 08 Material Failure and Durability, test your knowledge, and prepare for your next test or exam.
20 questions
02
Choose one
1 point
Which material property describes the ability to resist crack growth?
- A
The ability to withstand any load without deforming
- B
The ability to resist crack growth
- C
The rate at which a material loses mass in a corrosive environment
- D
The maximum temperature at which a material can be used
03
True or false
1 point
True or false: Polymers can undergo creep at ordinary service temperatures.
- A
True
- B
False
04
Choose one
1 point
A moving component develops grooves as hard debris cuts and plows its surface. Which wear mechanism best explains the damage?
- A
Local bonding and shearing between surfaces
- B
Hard particles or rough asperities cutting or plowing a surface
- C
Crack growth caused by repeated fluctuating loads
- D
Time-dependent deformation under sustained stress
05
Choose one
1 point
A component under sustained stress shows a rapidly increasing deformation rate shortly before rupture. Which period of a typical creep curve does this indicate?
- A
The initial period, when the creep rate decreases
- B
The near-steady period, when the creep rate is approximately constant
- C
The final period, when deformation accelerates
- D
The recovery period, when the material returns to its original dimensions
06
Choose one
1 point
A failed part has a visible crack, but its operating conditions are not yet known. What is the soundest next conclusion or action?
- A
Treat the visible crack as proof that corrosion was the cause
- B
Use the crack as evidence and investigate loading history and service environment to identify the cause
- C
Replace the part with a stronger material without examining the failure
- D
Clean and rub the fracture surface before documenting it
07
Choose all
1 point
Which measures can help prevent corrosion? Select all that apply.
- A
Match the material to the service environment
- B
Use a suitable protective coating
- C
Increase the contact load between surfaces
- D
Electrically isolate dissimilar metals where appropriate
08
Choose all
1 point
A design team wants to improve a component’s fatigue life. Which actions are supported? Select all that apply.
- A
Reduce stress range and vibration
- B
Smooth or round stress concentrations
- C
Rely on a single static-strength value to establish fatigue life
- D
Prevent corrosion
09
Written response
1 point
What is the term for damage caused by small oscillatory motion between loaded surfaces?
10
Written response
1 point
What is the name of the combined mechanism in which corrosion accelerates fatigue damage?
11
Written response
1 point
What wear mechanism involves local bonding and shearing between contacting surfaces, sometimes transferring material from one surface to the other?
12
Fill in the blank
1 point
A small corrosion pit may serve as a .
13
Fill in the blank
1 point
A sound failure investigation connects the with the and the .
14
Open ended
1 point
Outline a sound investigation of a failed component. Include how to preserve and examine evidence, how to distinguish failure mode from cause, and what should happen after the cause is identified.
15
True or false
1 point
True or false: A polymer component held under sustained stress can creep at ordinary service temperatures.
- A
True
- B
False
16
Choose one
1 point
A component separates suddenly with little visible deformation beforehand. Which description best fits this fracture behavior?
- A
It is always preceded by substantial plastic deformation.
- B
It can propagate with little visible deformation.
- C
It occurs only in ceramics.
- D
It cannot begin at a flaw or stress concentration.
17
Written response
1 point
What term describes damage caused by small oscillatory motion between loaded surfaces? Enter the term.
18
Choose one
1 point
A surface shows grooves made as hard particles cut and plow the material. Which wear mechanism best explains the damage?
- A
Local bonding and shearing between contacting surfaces
- B
Crack growth under repeated loading of a component
- C
Hard particles or rough asperities cutting or plowing a surface
- D
Chemical deterioration caused by the surrounding environment
19
Choose one
1 point
A joint between dissimilar metals is vulnerable to galvanic corrosion. Which design measure can help prevent it?
- A
Increase contact between the metals to equalize their surface wear.
- B
Electrically isolate the dissimilar metals.
- C
Use a sharper corner where the metals meet.
- D
Increase sustained mechanical stress at the joint.
20
Choose one
1 point
A part will experience repeated loading in service, and its peak stress is below the material's yield strength. Which approach is most appropriate for assessing fatigue life?
- A
Use the material's static strength as the sole basis for estimating service life.
- B
Focus only on preventing sustained deformation at high temperature.
- C
Use cyclic-load data and account for the actual service environment.
- D
Assume that peak stress below yield strength rules out fatigue.