Destructive And Non-destructive Tests

Question 1

Which of the following is not a non-destructive test

A. Ultrasonic testing
B. Tensile strength test
C. Radiographic inspection
D. Magnetic particle testing

Answer 1

B. Tensile strength test

Tinsel strength tests apply force until failure, making them destructive. Unlike non-destructive tests like ultrasonic or radiograph inspection

Question 2

Which destructive test is used to measure a material’s resistant to impact forces

A. Charpy test
B. Liquid penetrant test
C. Magnetic particle inspection
D. Tensile test

Answer 2

A. Charpy test

The charpy impact test determines the energy absorbed by a material during fracture under high-speed impact conditions

Question 3

A fatigue test is performed on a component. What does it measure?

A. The electrical conductivity of a material
B. The chemical composition of the material
C. The corrosion resistance of a metal
D. The materials behavior under cyclic loading

Answer 3

D. The materials behavior under cyclic loading

Fatigue testing evaluates how a material withstands repeated loads over time which helps determine its lifespan

Question 4

Which NDT method works by detecting surface cracks using a liquid that seeps into tiny openings

A. Liquid penetrant testing
B. Ultrasonic testing
C. X-ray radiography
D. Charpy impact testing

Answer 4

A. Liquid penetrant testing

Liquid penetrant testing or lpt involves applying a die to detect surface cracks that are not visible to the naked eye

Question 5

What is the working principle of ultrasonic testing

A. Have measures the electrical resistance of a component
B. It uses high frequency, sound waves to detect flaws and materials
C. It uses x-ray imaging to visualize material defects
D. It tests the compressive strength of a material

Answer 5

B. It uses high frequency, sound waves to detect material flows

Ultrasonic testing or UT sends sound waves through materials to identify internal flaws based on how waves reflect from defects

Question 6

Which of the following scenarios is best suited for destructive testing

A. Performing routine inspections of welded pipes and a power plant
B. Detecting cracks and an airplane Wing during maintenance
C. Inspecting the thickness of a metal sheet in a manufacturing line
D. Evaluating the strength of a new material for aerospace applications

Answer 6

D. Evaluating the strength of new material for aerospace applications

Destructive testing is useful when testing new materials are designs where braking the specimen is necessary to evaluate performance

Question 7

Which NDT method is best suited for detecting delamination in composite materials

A. Magnetic particle
B. Liquid penetrant
C. Ultrasonic testing
D. Visual inspection

Answer 7

C. Ultrasonic testing

Ultrasonic testing can detect internal separations works well with composites shows layer separation non-destructive method

Question 8

In a tensile test, what does the yield point represent

A. Point of complete failure
B. Point transition from elastic to plastic deformination
C. Maximum load point
D. Breaking point

Answer 8

B. Transition from elastic to plastic deformation

The yield point marks the critical transition where material behavior changes from elastic to plastic deformation. At this point, the material will no longer return to its original shape when the load is removed. This is a crucial parameter in engineering design as it defines the safe operating limits of materials

Question 9

Which type of radiation typically provides better penetration and radiographic testing

A. Infrared rays
B. X-rays
C. Gamma rays
D. Ultraviolet rays

Answer 9

C. Gamma rays

Gamma rays generally provide better penetration than x-rays due to high higher energy levels. They are particularly useful for examining thick materials and dense metals. However, gamma-ray sources require special handling and safety procedures due to their constant emission

Question 10

An ultrasonic testing. What is the primary function of the couplant?

A. Clean the surface
B. Improve sound transmission
C. Protect the probe
D. Measure thickness

Answer 10

B. Improve sound transmission

The couplant eliminates air gaps between the transducer and test surface ensuring efficient sound wave transmission sound waves cannot travel efficiently through air making the couplants essential for accurate readings. Common couplants include water, oil and specialized gels.