Metrology And Measurements Set 3

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This set of Metrology and Measurements Multiple Choice Questions & Answers (MCQs) focuses on Metrology And Measurements Set 3

Q1 | Which of the following is not true about metrology lasers used in laser inspection?
  • these are high-power instruments
  • used for rapid non-contact gauging of delicate parts
  • have low optical cross-talk
  • wide dynamic range
Q2 | What is the wavelength of light produced by He-Ne laser in laser inspection?
  • 6988 Å
  • 5328 Å
  • 5928 Å
  • 6328 Å
Q3 | Which technique is not suitable to measure large diameter parts or large gaps?
  • diffraction pattern technique
  • scanning laser technique
  • photodiode array imaging
  • laser triangulation sensor
Q4 | Which of the following is true about resolution in two frequency laser interferometer?
  • straightness resolution – 90 nm
  • angular resolution – 3 arc seconds
  • flatness resolution – 2 nm
  • linear resolution – 1 nm
Q5 | How much accuracy can be achieved by photodiode array imaging?
  • ±0.05 μm
  • ±0.15 μm
  • ±0.5 μm d) ±0.25 μm
Q6 | Which application is ideally suited for two frequency laser interferometer?
  • pitch and yaw measurement
  • hole diameters
  • thickness measurement
  • measurement of edge locations
Q7 | The location of the image spot directly depends on which factor in laser triangulation sensor technique?
  • wavelength of laser
  • measuring range
  • standoff distance
  • focal length of lense
Q8 | Which technique from given laser inspection techniques is useful for measuring the diameter of hot steel bars?
  • laser scanning gauge
  • frequency laser interferometer
  • laser triangulation sensors
  • photodiode array imaging
Q9 | Where does wire is placed in a measurement of diameter using the technique of gauging wide diameter from the diffraction pattern formed in a laser beam?
  • between collimator and lens
  • between collimator and source
  • between collimator and plane of measurement
  • between collimator and detectors
Q10 | How many sensors are needed to measure part thickness by using laser triangulation sensors?
  • 1
  • 2
  • 3
  • 4
Q11 | What precise movement does CMM have?
  • precise movement in x coordinate
  • precise movement in x and y coordinates
  • precise movement in y and z coordinates
  • precise movement in x, y and z coordinates
Q12 | Which type of CMM is most suited for large heavy workpieces?
  • cantilever type
  • bridge type
  • horizontal boring mill type
  • floating bridge type
Q13 | Which direction is sensed by a linear measurement transducer used in CMM?
  • positive direction only
  • negative direction only
  • both positive and negative direction
  • not used to sense directions
Q14 | What is the accuracy of present day co- ordinate measuring machine?
  • 10 microns
  • 5 microns
  • 2 microns
  • 1 micron
Q15 | What is the name of an element which uses inductive coupling?
  • inducto conduct
  • inductosyn
  • conductosyn
  • conducto induct
Q16 | Which principle is used in the three master guideways and probe location?
  • principle of dynamic design
  • principle of static design
  • principle of kinematic design
  • principle of effective design
Q17 | What is the cause of translational errors in CMM?
  • error in scale division
  • error in straightness
  • twisting error
  • roll error
Q18 | Which of the following is not related to the geometrical accuracy of CMM?
  • straightness of axes
  • squareness of axes
  • position accuracy
  • axial length measuring accuracy
Q19 | How many measurement parameters are considered in checking axes accuracy of straightness in CMM?
  • 2
  • 4
  • 6
  • 8
Q20 | How many reference gauges are measured for volumetric length measuring accuracy in CMM?
  • 2
  • 3
  • 4
  • 5
Q21 | Which of the following is true for trigger type probe system used in computer controlled CMM?
  • bucking mechanism is a 2 point bearing
  • current coordinate position stored when circuit is close
  • contacts of point bearing arranged at 90 degree
  • contacts of point bearing act as electrical micro switches
Q22 | What does the total number of pixels in the region defines?
  • perimeter
  • area
  • intensity
  • brightness
Q23 | What is the unit of compactness of a region?
  • meter
  • meter2
  • no units
  • meter-1
Q24 | For which of the following regions, compactness is minimal?
  • rectangle
  • square
  • irregular
  • disk
Q25 | Compactness is insensitive to orientation.
  • true
  • false