Engineering Metrology Practice Test 10

1. What is the equation for experimental variance used in Type-A evaluation of uncertainty?

σ = √[(1/n+1) ∑ⁿ_i=1 (xi-x’)].

σ = √[(1/n-1) ∑ⁿ_i=1 (xi+x’)²].

σ = √[(1/n-1) ∑ⁿ_i=1 (xi-x’)].

σ = √[(1/n-1) ∑ⁿ_i=1 (xi-x’)²].

2. Which of the following is not treated as Type-B uncertainty?

Nonlinearity

Repeatability

Common Mode Voltage

Hysteresis

3. What is mathematical morphology?

Method of image compression

Method of image processing and analysis

Method of image formation

Method of image rendering

4. Which of the following statement is true about Type-A uncertainty?
Statement 1: Most of the systematic uncertainty is Type-A uncertainty.
Statement 2: Type-A uncertainties vary each and every time a measurement is made.

T, F

F, F

F, T

T, T

5. Which type of display is used to read fonts of character?

2 segment display

6 segment display

4 segment display

7 segment display

6. How many data points can be analyzed in 20 seconds using grazing incidence interferometry?

65,000

55,000

35,000

45,000

7. How many diffraction gratings are used by interferometer in grazing incident technique with laser beam system?

8. Which of the following option is correct for the given statements about gray scale and binary imaging?
Statement 1: All binary images are gray scale images.
Statement 2: In gray scale imaging, every pixel is represented by 8 bits.

F, T

T, T

F, F

T, F

9. What is the use of an interference microscope?

Only illuminate the cracks

Develop a permanent visual record

Measure width of crack

Measure depth of scratches

10. Which of the following option is true for the evaluation of the surface by using grazing incident technique with laser beam system?

It can two dimensional profiles with submicron accuracy

It measure half the part surface at a time

Video screen is used to view test results

It can produce three dimensional profiles with submicron resolution