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Question 1:

Which non-destructive testing method uses sound waves to detect internal defects or discontinuities in a material?

A) Ultrasonic testing
B) X-ray radiography
C) Magnetic particle testing
D) Eddy current testing

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Explanation: The correct answer is A) Ultrasonic testing. Ultrasonic testing uses sound waves to detect internal defects or discontinuities in a material by measuring the time taken for the sound waves to travel through the material and reflecting from the defects.

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Question 2:

Which non-destructive testing method uses penetrating X-rays to visualize the internal structure of a material?

A) Ultrasonic testing
B) X-ray radiography
C) Magnetic particle testing
D) Eddy current testing

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Explanation: The correct answer is B) X-ray radiography. X-ray radiography uses penetrating X-rays to visualize the internal structure of a material, allowing the detection of defects, cracks, and other anomalies.

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Question 3:

Which non-destructive testing method is based on the principle of electromagnetic induction and detects surface and subsurface defects in conductive materials?

A) Ultrasonic testing
B) X-ray radiography
C) Magnetic particle testing
D) Eddy current testing

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Explanation: The correct answer is D) Eddy current testing. Eddy current testing is based on the principle of electromagnetic induction and detects surface and subsurface defects in conductive materials by measuring changes in electrical currents induced by a varying magnetic field.

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Question 4:

Which non-destructive testing method uses fine iron particles to detect surface defects in ferromagnetic materials?

A) Ultrasonic testing
B) X-ray radiography
C) Magnetic particle testing
D) Eddy current testing

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Explanation: The correct answer is C) Magnetic particle testing. Magnetic particle testing uses fine iron particles applied to a surface to detect surface defects in ferromagnetic materials by creating magnetic fields that concentrate around the defects.

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Question 5:

Which non-destructive testing method uses a magnetic field to assess the thickness or integrity of non-magnetic coatings on a magnetic substrate?

A) Ultrasonic testing
B) X-ray radiography
C) Magnetic particle testing
D) Eddy current testing

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Explanation: The correct answer is D) Eddy current testing. Eddy current testing, specifically using a magnetic field probe, can assess the thickness or integrity of non-magnetic coatings on a magnetic substrate by measuring changes in the electrical conductivity of the coating.