Metrology And Measurements Set 5 MCQs

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