NDT Midterm Quiz Flashcards - Engineering Study Terms

What statement is true about all the following materials: Steel, Titanium, Aluminum, Brass, Bronze, and Stainless Steel

They are all conductive.

Which of the following would result in a relevant indication?

a crack in the part

Ferrous materials all contain which of the following:

Iron

A ____________ indication is one caused by a known feature of the part.

Non-relevant

Match each indication type with its definition.

_____ An indication caused by a process error; insufficient wash, over wash, dwell time too short/long, thumb/finger print, etc.

______An indication resulting from a known cause, such as surface finish, forging marks, part marks, etc.; something to be expected but not an indication of failure or impending failure

______A true flaw that is detected

1. Real or Relevant

2. Non-Relevant

3. False

3, 2, 1

All of the following are examples of common NDT methods except:

a) Cross sectioning

b) Liquid penetrant

c) Ultrasonic

d) X-ray

e) Magnetic Particle

a) Cross sectioning

A false indication would be the result of _________.

Setting the part down in a puddle of penetrant

A non-ferrous material typically _______ be magnetized.

cannot

The direction that one sees while looking through a borescope relative to the centerline of the scope is called the Field of View.

a) True

b) False

b) False

Be able to identify the Working length on a borescope.

Diagram is in the module 1 slides.

Which of the following is true about a fiberscope?

the image is transferred to the eye thru a fiber-optic bundle

The end of a scope that picks up the image is known as the ________ end.

Distal

Which of the following is true about a videoscope?

it has a camera on the distal end

Magnetic particle inspection is best used to detect surface defects however shallow subsurface defects may also be detected.

a) True

b) False

a) True

When performing magnetic particle inspection, a crack in a magnetized part will cause

flux to leave the surface of the part at the crack

When the poles of all the individual atoms in a material are aligned it is at what point on the curve shown in the image (6)?

A

During magnetic particle testing a part is normally magnetized in two orientations referred to as...

circular and longitudinal

A crack can best be detected in magnetic particle testing when it is oriented...

in the same direction as the electric current

Point C on this image (6) depicts the __________ property of a material.

Coercivity

When using florescent particles in an oil bath, the concentration should be _____ ml of particles per ______ ml of bath solution.

0.2-0.4, 100

When magnetizing a gear with an outer circumference of 7 inches using a 3/4-inch diameter copper central conductor, what is the minimum number of times you would have to rotate and re-magnetize the gear to ensure magnetization of the entire part? (Math required, I'm not giving you animals the formulas)

3

The four methods of penetrant are categorized based on:

how the dye is washed off

The two main types of penetrant inspection are...

Type I: Fluorescent; Type II: Color Contrast

Developers pull the penetrant out of flaws using __________.

Blotting action

Method C, solvent removeable, penetrants must contain a built in emulsifier.

a) True

b) False

b) False

Penetrant is drawn into the crack as a result of...

capillary action

The total resistance in an inductive circuit is the sum of the ______ and the ____ of the coil.

inductive reactance, resistance

Select the true statement about eddy current testing

can be used on any material that conducts electricity

The maximum depth at which eddy current testing can reliably detect flaws is known as...

standard depth of penetration

An impedance plane diagram shows the relationship between...

resistance and inductive reactance

Which of the following would not normally be within the capability of eddy current testing?

detect a void in a casting two inches below the surface

The frequency range used for eddy current testing is typically between...

50 Hz and 4 MHz

Which type of ECT probe uses a separate driver coil and pick-up coil?

reflection

In eddy current testing, small diameter coils are typically operated at a _________ frequency than larger diameter coils.

higher

Which of the following does not affect the depth of penetration during eddy current testing?

the use of AC vs. DC current

Eddy currents are...

electrical currents induced in the test piece by the magnetic field from the test probe

Temperature changes will have an effect on the speed of sound through a material.

a) True

b) False

a) True

The combined effect of scattering and absorption of sound energy in a material is called _____.

Attenuation

When performing pulse-echo ultrasonic inspection it is difficult to detect surface flaws due to limited sensitivity in the ___________ range.

Near-Field

All of the following are disadvantages of ultrasonic testing except...

a) It normally requires a coupling medium to promote the transfer of sound energy into the test specimen

b) Linear defects oriented parallel to the sound beam may go undetected

c) Surface must be accessible to transmit ultrasound.

d) The depth of penetration for flaw detection or measurement is superior to other NDT methods

e) Cast iron and other coarse grained materials are difficult to inspect due to low sound transmission and high signal noise

d) The depth of penetration for flaw detection or measurement is superior to other NDT methods

All of the following are advantages of ultrasonic testing except...

a) Only single-sided access is needed when the pulse-echo technique is used Minimal part preparation is required

b) The depth of penetration for flaw detection or measurement is superior to other NDT methods

c) Detailed images can be produced with automated systems.

d) Materials that are rough, irregular in shape, very small, exceptionally thin or not homogeneous are difficult to inspect

d) Materials that are rough, irregular in shape, very small, exceptionally thin or not homogeneous are difficult to inspect

In longitudinal waves, the oscillations occur __________ to the direction of wave propagation.

Parallel

The primary method for generating and detecting sound waves in UT is with the use of __________ transducers.

Piezoelectric

In transverse or shear waves, the oscillations occur __________ to the direction of wave propagation.

Perpendicular

It is necessary to have a reference standard when performing ultrasonic testing.

a) True

b) False

a) True

The speed of sound is the same through all materials all the time.

a) True

b) False

b) False

A ___________ is a material (usually liquid) that facilitates the transmission of ultrasonic energy from the transducer into the test specimen.

Couplant

Two or more identical sound waves that are in opposite phase with one another will combine to form a wave with ____________ amplitude.

a) A smaller or zero

b) An unknown

c) A greater

a) A smaller or zero