Metrology And Measurements Set 5

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This set of Metrology and Measurements Multiple Choice Questions & Answers (MCQs) focuses on Metrology And Measurements Set 5

Q1 | What is a thread per inch in screw thread?
  • pitch in inches
  • axial distance moved by threaded part
  • reciprocal of pitch in inches
  • radial distance moved by threaded part
Q2 | Which of the following is not true about effective diameter?
  • also known as pitch diameter
  • it decides quality of fit between nut and screw
  • this is the diameter of minor cylinder
  • it is a very important dimension for screw threads
Q3 | Which of the following is true for the multiple start screw threads?
  • it is produced by a single helical groove
  • grooves should be different in spacing
  • it gives a quick transverse
  • it is formed in a transverse section on a cylinder
Q4 | Statement 1: Flank angle of symmetrical thread is known as thread’s half-angle. Statement 2: It is measured parallel to the axis of a thread.
  • t, f
  • f, f
  • t, t
  • f, t
Q5 | Flanks of the threads connect the crest with the roots.
  • true
  • false
Q6 | What is the effect of improper alignment of each tooth?
  • tooth thickness increases
  • face width decreases
  • load will not distributed evenly
  • pitch of teeth reduced
Q7 | Which of the following is not true about concentricity of teeth?
  • fluctuating velocity will be noticed when not concentric
  • can be checked by using projector
  • inaccuracy of parts when not concentric
  • should be tested to ensure the proper heat treatment
Q8 | Which of the following option is true about an analytical method of inspection of gears?
  • analytical method is widely used for industries
  • this method is fast
  • all individual elements of gear teeth are checked
  • more accurate
Q9 | Which of the following element is not determined by analytical inspection?
  • profile
  • composite vibrations
  • spacing
  • pitch
Q10 | Statement 2: Gear blank should be tested for dimensional accuracy.
  • t, f
  • f, f
  • f, t
  • t, t
Q11 | Which of the following is not determined by the functional type of inspection?
  • lead
  • noise level
  • variation in action
  • vibration
Q12 | Which of the following statement is true about inspection of gear?
  • profile is determined by functional inspection
  • backlash is determined by analytic inspection
  • analytic test require running test of gear
  • thickness of tooth is measured by functional inspection
Q13 | Which of the following machine is used for rolling tests?
  • parkson gear tester
  • tooth caliper
  • base pitch measuring instrument
  • involute profile testing machine
Q14 | If reference circle of gear is eccentric then which error is reflected by this eccentricity?
  • cyclic error
  • periodic error
  • pitch error
  • undulation
Q15 | Statement 2: Accuracy of individual elements is necessary for precision gears.
  • t, f
  • f, f
  • t, t
  • f, t
Q16 | Which of the following is the best for the examination of surface finish?
  • touch inspection
  • visual inspection
  • scratch inspection
  • microscopic inspection
Q17 | best method for examining the surface finish. Visual, touch and scratch inspection methods are not as accurate as microscopic. In these methods, minute flaws can’t be detected.
  • 0.0001 mm
  • 0.001 mm
  • 0.01 mm
  • 0.1 mm
Q18 | Which of the following material is not used for rubbing on the surface to be inspected in scratch inspection?
  • softer material
  • hard material
  • plastic
  • lead babbitt
Q19 | Statement 2: Direct instrument measurement is enabled to determine a numerical value of surface finish.
  • f, t
  • t, f
  • f, f
  • t, t
Q20 | What is the limitation of microscopic inspection to check surface finish?
  • an average value is needed
  • small portion of surface can be detected at a time
  • a master finish surface is also needed
  • it is necessary to inspect whole surface together
Q21 | In the method of microscopic inspection what is the angle of beam light with the work?
  • 200
  • 300
  • 600
  • 900
Q22 | Which of the following is true for a method of measurement of surface finish with surface photographs?
  • different type of illumination is needed
  • no effect of type of illumination
  • same type of illumination is needed
  • monochromatic light is needed
Q23 | In case of vertical illumination in measuring surface finish with surface photographs, which will appear as bright area?
  • flat portion
  • scratch
  • irregularity
  • hills
Q24 | Which of the following method use pendulum in measuring the surface finish?
  • micro interferometer
  • wallace surface dynamometer
  • reflected light intensity method
  • microscopic inspection
Q25 | Which of the following is not true for the method of measurement of surface finish by micro interferometer?
  • optical flat is used
  • monochromatic source of light is used
  • depth of defect can’t be measured
  • interference lines plays an important role in identification of the defect