master question-ultra sonic testing(full version)

UTQP-001 Ruane Technical Services Ultrasonic Testing Calculation Calculate the wavelength for the following probes: a) b) c) d) e) f) g) h) Longitudinal wave for a 2.5MHz in Copper Longitudinal wave for a 5.0MHz in Aluminium Longitudinal wave for a 1.25MHz in Copper Longitudinal wave for a 2.25MHz in Aluminium Transverse wave for a 5.0MHz in Aluminum Transverse wave for a 1.25MHz in Mild Steel Transverse wave for a 5.0MHz in Mild Steel Transverse wave for a 2.0MHz in Aluminium Calculate the near zone for the following probes: a) b) c) d) e) f) 20mm dia 5.0MHz 0º in Aluminum 10mm dia 2.5MHz 0º in Aluminum 10mm dia 4.0MHz 0º in Copper 15mm dia 2.5MHz 60º in Iron 20mm dia 5.0MHz 45º in Cast iron 20mm dia 1.25MHz 0º in Mild steel Calculate the al beam angle for the following compression probes in Mild steel a) 10mm dia 5.0MHz b) 20mm dia 1.25MHz c) 15mm dia 4.0MHz Calculate by using Snell’s Law and velocities given below, angle of Perspex wedge required to produce shear wave in mild steel at a refracted angle of 60º And as above to produce a refracted angle of 70º UTQP-002 Ultrasonic Testing Question Paper – Day Name: ……………………………… Signed: ……………………………… Date: ………………………………… This column is for office use Result: Marker 1: Marker 2: What are the main different between longitudinal and transverse waves? What we mean by a 0º probe? Explain the Piezo Electric Effect? What is the formula for calculating wavelength? What is the formula for calculating the half beam spread? Produce a sketch to illustrate wavelength? a) Why is the crystal lithium sulfate of little used in NDT? b) Which crystal is the best transmittal of ultra sonic energy? What thickness of Perspex is used in the IIW block and what thickness Does it represent in steel? Explain the purpose of the two milled slots in the IIW block 10 a A 20dB drop represent…………………………….of its former height b A 6dB drop represent……………………………of its former height UTQP-003 Ultrasonic Testing Question Paper – Day Name: ……………………………… Signed: ……………………………… Date: ………………………………… This column is for office use Result: Marker 1: Marker 2: Does equipment required re-calibrating if the probe being used is changed for one of the same type? How many back echoes are required in order to calibrate the screen for operation with normal probes? What is the formula for calculating the near zone? Define resolution? What is refraction? What is diffraction? State Snells Law What are mode change and spurious indications? What does velocity in a medium depends upon? 10 Calculate the wavelength for the following: (velocity approx) a Longitudinal waves for 5.0MHz in cast iron 3500 m/sec b Longitudinal waves for 2.5 MHz in mild steel 5960 m/sec c Longitudinal waves for 4MHz in mild steel 5960 m/sec d Transverse waves for 5MHz in copper 2325 m/sec e Transverse waves for 2.5MHz in mild steel 3240 m/sec UTQP-004 Ultrasonic Testing Question Paper – Day Name: ……………………………… Signed: ……………………………… Date: ………………………………… This column is for office use Result: Marker 1: Marker 2: Calculate the half beam angle for the following crystal size and frequency (assume compression probe working in ferritic steel): a Crystal size = 20mm , frequency = 2.5MHz b Crystal size = 10mm , frequency = 2.5MHz Discuss what you understand by the term critical angle What effect has suppression on the amplifier? What is attenuation in respect to the material? Define acoustic impedance A higher frequency of probe gives: a b c d a better resolution a reduced sensitivity greater penetration a shorter wavelength Calculate the near zone for the following: a Crystal size = 10mm, frequency = 5MHz, Acoustic Velocity = 5960m/sec b Crystal size = 20mm, frequency = 2.5MHz, Acoustic velocity = 5960 m/sec c Crystal size = 10mm, frequency = 2MHz , Acoustic velocity = 3240m/sec Calculate the incident angle, using Snell Law, to produce shear waves in mild steel at a refracted angle of 35º to the normal Ultrasonic Testing Question Paper Name: ……………………………… Signed: ……………………………… Date: ………………………………… This column is for office use Result: Marker 1: Marker 2: UTQP-005 Instruction: Using a pen, circle the letter preceding your chosen answer (circle only one answer), i.e A, b, c or d if you wish to change your answer, place a cross in the circle and circle your new answer Which of the following apply to shear wave propagation? a Particles vibrate to the direction of propagation b Particles vibrate at right angles to the direction of propagation c Particles vibrate elliptically to the direction of propagation d Penetration is limited to one wavelength e Both b and d Which of the following formula would you used to determine half beam divergence? a Sin A = KD λ b Sin A = Kλ D c Sin A = MC2 d A = x Kλ D Which British standard is used for assessing the performance of ultrasonic sets? a BS 3683 b BS 2704 c BS 4331 d None of the above In ultrasonic testing, the time duration of the transmitted pulse is referred to as a b c d The pulse length or width The pulse amplitude The pulse shape None of the above The beam spread is a function of: a b c d Height and width of the probe Percentage elongation of the crystal Crystal diameter and frequency None of the above The smallest defect detectable with a 5MHz transverse wave probe is approximately: a b c d 0.15mm 0.3mm 0.5mm 0.6mm The process of adjusting the instrument or device to a reference standard is known as: a b c d Angulation Scanning distance-amplitude correction (DAC) Calibration The amount of penetration of an ultrasonic wave is dependent upon: a b c d the probe specimen contact pressure wavelength particle velocity both a and c What is the British standard for ultrasonic test blocks a b c d BS2704 BS2910 BS5996 There is no British standard for ultrasonic test block 10 In an ultrasonic flaw detector, the attenuator: a b c d produce linear travel across the x-plate deliver electrical energy to the crystal accepts and amplifies the percentage of electrical pulse controls the relationship of volt in / volts our across the y-plates 11 What is the following material of the same alloy is most likely to produce the greatest amount of sound attenuation over a given distance? a b c d hand forging A course gain casting An extrusion The attenuation is equal in all material 12 A test method employing two separates probes on opposites surface of the material being tested is called a b c d contact testing surface wave testing through transmission testing lamb wave testing 13 25 million cycles per second can also be stated as: a b c d 25 kilohertz 2500 kilohertz 25 megahertz 25 micro hertz 14 In an A-scan presentation the amplitude of vertical indication on the screen represents the: a b c d amount of the ultrasonic energy returning to the probe distance travel by the search unit elapsed time since the ultrasonic pulse was generated thickness of the material being tested 15 The gradual loss of sonic energy as the ultrasonic vibration travel through the material is referred to as: a reflection b refraction c reproducibility d attenuation 16 When the accident angle is chosen to be between the first and second critical angle, the ultrasonic wave mode within the part will be a: a b c d compression wave shear wave surface wave both a and b 17 The ability to resolve two discontinuities at different depth would be improved by: a b c d decreasing the frequency shortening the pulse duration increasing the pulse duration none of the above 18 Ultrasonic waves in test material are: a b c d electromagnetic waves low voltage electric field discontinuities radio waves mechanical vibrations UTQP-006 Ultrasonic Testing Question Paper Name: ……………………………… Signed: ……………………………… Date: ………………………………… This column is for office use Result: Marker 1: Marker 2: Draw an IIW block and shows its dimension What is the British Standard for ultrasonic calibration blocks? flaw Explain how you would check the amplifier and time base linearity of a detector a Calculate the wavelength of a MHz 0º probe in steel VL steel = 5, 960 m/sec b What effect does a change in frequency have on the velocity in the same material? What is resolution and how would you check the resolution of a 0° probe? label all major features Produce a sketch of a typical angle probe and near zone, far zone and the half Draw an ultrasonic beam showing the dead zone, angle of divergence of technique? Explain, with the aid of diagrams, the main modes technique? What is mean by the through transmission 10 technique to size a lamination Describe how you would use the dB drop UTQP-007 MULTI-CHOICE QUESTION PAPER 1 Which of the following statements is true? a Lamellar tearing is a HAZ type of crack which may be associated with single V butt welds in steel b Fluorescent inks used in MPI always have a paraffin base c Ultrasonic testing of welds is preferred over radiography if all the weld discontinuities are to be detected d Fluorescent inks and penetrants provide a higher contrast than non- fluorescent inks or penentrants When using an A2 block (BSEN 12223) to calibrate a shear wave probe over the 100mm quadrant, a guide strip is recommended If persistent side wall echoes appear or the echo is weak, then: a b c d The beam index point should be checked The beam angle should be checked The beam alignment should be checked All of the above You are asked to test a welded assembly for fatigue crack using MPI, which areas would you test? a Over the entire surface b Only at the toes of the welds c At any sharp changes in contour, which will probably include the toes of the welds if they have not been blended d Fatigue cracks cannot exist on welded assemblies ... ultrasonic energy returning to the probe distance travel by the search unit elapsed time since the ultrasonic pulse was generated thickness of the material being tested 15 The gradual loss of sonic. .. resolution? a.The ability of an ultrasonic pulse to locate a small defect b The ability of an ultrasonic pulse to show a small defect on the CRT c.The ability of an ultrasonic test to show on the CRT... ultrasonic test blocks a b c d BS2704 BS2910 BS5996 There is no British standard for ultrasonic test block 10 In an ultrasonic flaw detector, the attenuator: a b c d produce linear travel across the x-plate