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WorksheetsCHAPTER 3_INTRODUCTION TO AUTONOMOUS MAINTENANCE (AM)
Total questions: 10
Worksheet time: 5mins
Q1. What does roughness height represent?
Distance between two parallel surfaces
Average slope of the surface
Distance between successive valleys
Height of irregularities with respect to a reference line
Q2. The roughness width is defined as:
Distance parallel to nominal surface between successive peaks
Distance between highest and lowest point
Average of irregularities in a given section
Ratio of peak to valley height
Q3. Lay in surface measurement refers to:
Depth of valleys
Average profile line
Filter cut-off value
Direction of predominant surface texture
Q4. Which of the following is a long wavelength variation in surface texture?
Waviness
Datum
Lay
Roughness
Q5. The Arithmetic Average (Ra) roughness is also known as:
RMS
CLA or AA
Maximum roughness height
Waviness width
Q6. Which profiling method is considered the industrial standard for surface measurement?
White light interferometry
Optical holography
Stylus profilometry
Speckle interferometry
Q7. In surface measurement, a skid is used to:
Detect optical scatter
Increase magnification
Eliminate waviness effects
Prevent movement in and out of roughness features
Q8. What is the main drawback of direct measurement methods using a stylus?
May cause micro-scratches on the surface
Limited to non-metallic surfaces
Requires machine vision system
Cannot detect waviness
Q9. Excess surface roughness can lead to:
Better fatigue strength
Higher wear resistance
Improved corrosion resistance
Excess frictional heating and mechanical failure
Q10. According to ISO, the concept of bandwidth in surface roughness measurement was introduced to:
Improve surface adhesion of paint
Ensure comparability of measurement results
Reduce machining time
Measure waviness directly
