Application Online Workshop

Application Online Workshop - Quiz UT 3

or Go to Level UT 1 UT 2
by T. Carodiskey¹⁾ , T. Nelligan²⁾, J. O. Strycek³⁾, F. Mohr⁴⁾, R. Freemantle⁵⁾, E.A. Ginzel⁶⁾ , L. Svilainis⁷⁾, W. Hillger⁸⁾, Ahmad Chahbaz⁹⁾. (See Panel of Experts)

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1	When working with flat bottomed holes for calibration or evaluation purposes, what is the relationship between a #3 FBH and a #6 FBH ?
	5%
	25%	¹⁾
2	What water path is needed when using a straight beam transducer with a 4 inch (101 mm) focus to place Y0 at a bondline 17 mm deep in copper?
	4,12in
	2,06in	¹⁾
3	What is the decibel difference between 2 signals on the display with one at 85% full screen height and the other at 17% full screen height?
	7db
	14db	¹⁾
4	When testing a part with a rough surface, as compared to a similar part with a smooth surface, one should generally use:
	a) a higher frequency transducer and a more viscous couplant
	b) a lower frequency transducer and a more viscous couplant
	c) a higher frequency transducer and a less viscous couplant
	d) a lower frequency transducer and a less viscous couplant	²⁾
5	Asymmetrical plate waves are
	a) faster then shear waves, but slower than compressional waves
	b) slower than shear waves
	c) as fast as Rayleigh waves.	³⁾
6	Satellite pulses are unique to
	a) IGSCC
	b) notches
	c) fatique flaws
	d) Satellites can be expected from any planar flaw	⁴⁾
7	4. When attempting to size a crack with 1/2 Vee tip diffraction, the tip signal should:
	a) move with the signal
	b) be 180° out of phase with the corner signal ( usually )
	c) should appear ahead of the corner signal
	d) both a) and b)
	e) a),b) and c)	⁴⁾
9	What sampling frequency of 8 bit analog-to-digit convertion has to be used with fo central frequency ultrasonic wide bandwidth transducer? (More Answer)
	a) fo/2
	b) fo*10
	c) as high as possible
	d) fo*4.	⁷⁾

Rolf Diederichs 1. May 1997, info@ndt.net.de