ASNT LEVEL 1 UT EXAM NEWEST ACTUAL

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ASNT LEVEL 1 UT EXAM NEWEST ACTUAL

EXAM | ALL 150 QUESTIONS AND CORRECT

ANSWERS (VERIFIED ANSWERS) GRADED A+ |

LATEST EXAM |

In a basic ultrasonic test pattern (A-scan) for contact testing (assuming

no sweep delay is used), the initial pulse is: - ANSWER - the high

indication on the extreme left side of the display that represents the entry surface of the inspected part.

An ultrasonic test using a straight beam contact transducer is being conducted through the thickness of a flat part such as a plate. This test

should detect: - ANSWER - laminar-type discontinuities with major

dimensions parallel to the rolled surface.

In ultrasonic testing, a liquid coupling medium between the crystal

surface and the part surface is necessary because: - ANSWER - an air

interface between the crystal surface and the part surface would almost completely reflect the ultrasonic vibrations

Near-surface resolution is a characteristic of an ultrasonic testing system

that defines its ability to detect: - ANSWER - discontinuities located just

beneath the entry-surface in the part being tested.

During ultrasonic testing by the immersion method, it is frequently necessary to angulate the transducer when a discontinuity is located in

order to: - ANSWER - obtain a maximum response if the discontinuity is

not originally oriented perpendicular to the ultrasonic beam. 1 / 3

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pg. 2 On the area-amplitude ultrasonic standard test blocks, the flat-bottom

holes in the blocks are: - ANSWER - different in diameter, increasing by

0.4 mm (0.016 in.) increments from the No. 1 block to the No. 8 block.

In immersion testing, verification that the transducer is normal to a flat

entry surface is indicated by: - ANSWER - maximum reflection from the

entry surface.

A piezoelectric material can: - ANSWER - convert a mechanical energy

to electrical energy

Sound waves of a frequency beyond the hearing range of the human ear are referred to as ultrasonic waves or vibrations, and the term embraces all vibrational waves of frequency greater than approximately - ANSWER - 20000 Hz

The velocity of sound waves is primarily dependent on the - ANSWER - material properties and wave type.

The primary purpose of reference blocks is to: - ANSWER - obtain a

common reproducible signal.

When testing by the surface wave method, patches of oil or dirt on the

surface may: - ANSWER - cause both an attenuation of sound and

indications on the screen.

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In immersion testing, the most commonly used couplant is: - ANSWER

• water

The piezoelectric material in the transducer: - ANSWER - converts

electrical energy into mechanical energy and mechanical energy into electrical energy

The shortest wavelength pulse is produced by a frequency of - ANSWER - 25 MHz

The angle of incidence is: - ANSWER - equal to the angle of reflection.

On many ultrasonic testing instruments, an operator conducting an immersion test can remove that portion of the display presentation that

represents water distance by adjusting a: - ANSWER - sweep delay

control.

What is another way to express 100 000 cydles per second? - ANSWER

• 100 kHz

A transducer with a frequency greater than 10 MHz will most likely be

used during: - ANSWER - an immersion test.

The reference holes in standard aluminum area-amplitude ultrasonic test blocks contain - ANSWER - flat-bottom holes.

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