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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