Second Surface Metrology Quiz


How much do you know about surface metrology? This quiz contains five questions on profile parameters and five questions on areal parameters. Help is at hand if you get stuck as all the answers are to be found in the pages of our Surface Metrology Guide


Question 1: Which parameter is best suited for controlling the sealing efficiency of a gasket?

A Rq

B Pz

C Wt

D RSm

Question 2: Which parameter is the most sensitive to outliers?

A Rq

B Wz

C Rku

D Pa


Question 3: Which of the following parameters can be used to control lubrication efficiency?

A Rv

B Rvk

C Rdc

D Rpk

Question 4: Which of the following filtration conditions are best suited for the calibration of the vertical amplification coefficient on a profilometer?

A Roughness, λc = 0.8 mm

B Roughness, λc = 0.25 mm

C Roughness, λc = 2.5 mm

D Waviness, λc = 0.8 mm


Question 5: Which of the following statements are true?

A It is always mandatory to apply a λs filter

B The λs filter is sometimes forbidden

C The λs filter is not necessary for waviness parameters

D The λs filter can sometimes destroy useful information

Question 6: Which of the following parameters are calculated from an autocorrelation?

A Std

B Sal

C Str

D Sfd


Question 7: Which of the following methods are related to fractal analysis?

A Morphological envelopes

B Length-scale analysis

C Area-scale analysis

D Box method

Question 8: Which of the following parameters are not defined in ISO 25178?

A Sbi

B Sdv

C S3z

D S5v


Question 9: Which of the following parameters are Feature parameters?

A Spc

B Sda

C Std

D Spd

Question 10: Which famous metrologist once spoke about "parameter rash"?

A Professor Tom Thomas

B Professor David Whitehouse

C Professor Ken Stout

D Professor F.A. Firestone


Resources & answers

You will find help on the questions in this quiz, as well as a wealth of other information on surface metrology, within the pages of the Digital Surf Surface Metrology Guide

See the answers on Solutions of the Surface Metrology Quiz #2





This text was first published in the Surface Newsletter, Fall 2019.