Metrology And Measurements Set 9

Mechanical Engineering

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This set of Metrology and Measurements Multiple Choice Questions & Answers (MCQs) focuses on Metrology And Measurements Set 9

Q1 | Which of the following is correct for selective assembly?
  • not suitable for industrial purposes
  • cost increases due to automatic gauging
  • wastage is high due to selective selection
  • this method is followed in ball and roller bearing units
Answer: this method is followed in ball and roller bearing units
Q2 | Which of the following is used to check change in ocular lines position due to column rotation in universal micrometer?
  • dial indicator
  • slip gauges
  • control shaft
  • universal microscope
Answer: control shaft
Q3 | What is the least count of clinometer which is used to check reading of column rotation used for setting of helix angles in universal micrometer?
  • 1’
  • 2’
  • 3’
  • 4’
Answer: 1’
Q4 | How 34’ can be built by using angle gauges?
  • 27’+9’-3’+1’
  • 26’+10’-2’
  • 27’+10’-3’
  • 27’+8’
Answer: 27’+9’-3’+1’
Q5 | In how many series the gauges can be divided?
  • 1
  • 2
  • 3
  • 4
Answer: 3
Q6 | What is the approximate size of angle gauges?
  • 76mm long and 16 wide
  • 85mm long and 26 wide
  • 16mm long and 75 wide
  • 70mm long and 18 wide
Answer: 76mm long and 16 wide
Q7 | What is the accuracy of master angle gauges?
  • 0.1 sec
  • 1 sec
  • 0.25 sec
  • 3 sec
Answer: 0.25 sec
Q8 | Which gauges are present in the first series (degree) of angle gauges?
  • 5°, 10°, 15°, 25° and 40°
  • 1°, 3°, 9°, 27° and 41°
  • 1°, 5°, 9°, 25° and 45°
  • 5°, 10°, 15°, 30° and 45°
Answer: 1°, 3°, 9°, 27° and 41°
Q9 | How many sets of angle gauges are available?
  • 1
  • 2
  • 3
  • 4
Answer: 2
Q10 | What are the two grades of angle gauges?
  • master and tool room
  • precise and normal
  • standard and industrial
  • high and low
Answer: master and tool room
Q11 | How angle greater than 90° is measured?
  • by repeating gauges
  • using square plate
  • using sine bar
  • using auto collimator
Answer: using square plate
Q12 | Which of the following is not a gauge from standard B angle gauges?
  • 0.05’
  • 1’ c) 27’
  • d) 30
Answer: 0.05’
Q13 | 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
Answer: these are high-power instruments
Q14 | What is the wavelength of light produced by He-Ne laser in laser inspection?
  • 6988 Å
  • 5328 Å
  • 5928 Å
  • 6328 Å
Answer: 6328 Å
Q15 | 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
Answer: diffraction pattern technique
Q16 | 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
Answer: linear resolution – 1 nm
Q17 | How much accuracy can be achieved by photodiode array imaging?
  • ±0.05 μm
  • ±0.15 μm
  • ±0.5 μm d) ±0.25 μm
Answer: ±0.05 μm
Q18 | Which application is ideally suited for two frequency laser interferometer?
  • pitch and yaw measurement
  • hole diameters
  • thickness measurement
  • measurement of edge locations
Answer: pitch and yaw measurement
Q19 | 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
Answer: standoff distance
Q20 | 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
Answer: laser scanning gauge
Q21 | 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
Answer: between collimator and plane of measurement
Q22 | How many sensors are needed to measure part thickness by using laser triangulation sensors?
  • 1
  • 2
  • 3
  • 4
Answer: 2
Q23 | 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
Answer: precise movement in x, y and z coordinates
Q24 | Which type of CMM is most suited for large heavy workpieces?
  • cantilever type
  • bridge type
  • horizontal boring mill type
  • floating bridge type
Answer: horizontal boring mill type
Q25 | 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
Answer: both positive and negative direction
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