Fatigue Testing and Material Response Quiz

Which of the following items is NOT mentioned as being subjected to cyclic loads?

• Television screens

• Off-road biking frames

• Garage door springs

• Railway bridges

What is the primary reason for the term 'fatigue' in materials?

• Materials get tired over time

• Failure occurs under repeated loads over time

• Materials lose weight over time

• Materials change color over time

How many times did the garage door spring open and close before it fractured?

• 60,000 times

• 90,000 times

• 30,000 times

• 120,000 times

What is the diameter of the cylindrical region of the specimen used in the fatigue test?

• 5 millimeters

• 7 millimeters

• 4 millimeters

• 6 millimeters

What type of drive is the fatigue testing machine equipped with?

• Electric drive

• Hydraulic drive

• Mechanical resonance drive

• Pneumatic drive

What is the stress amplitude labeled with in the SN diagram?

• Sigma M

• Sigma C

• Sigma B

• Sigma A

At what number of load cycles is the fatigue limit for most steels with body-centered cubic structure reached?

• 15 million

• 10 million

• 5 million

• 1 million

What type of loading is used to test components in a manner similar to practical use?

• Thermal loading

• Operational loading

• Static loading

• Dynamic loading

Which method is used to examine special components for fatigue cracks in trams?

• Magnetic resonance imaging

• Ultrasound

• Thermal imaging

• X-ray

Before an aircraft is allowed to take off for the first time, what must it go through?

• Visual inspections

• Extensive stress tests

• Pilot training

• Operational tests