adm cmm course test 1

7/24/2019 ADM CMM Course Test 1

1/5

Academy for

Dimensional

Metrology

Classroom Test 1Metrology Conceptual

Name

Company

Select the right option

1. Metrology is aa. Measurement System Analysis & Inspectionb. Science of Measurementsc. Measurement evaluation of environment.d. Standard Room Activity.

2. Measurements are carried a. For Product conformance with its specifications.b. To find out and Minimise Product Rejections.

c. Because it is a part of our job.d. Routine Activity.

3. A Feature meansa. The datum specified by the drawing.b. Something that we compute.c. A Geometric object available machined on a component.d. Imaginary geometrical object derived from a component.

4. During Measurements, the object & the Instruments have to bea. Held tight to read correct dimension.b. Necessarily skew with each-otherc. Necessarily parallel & aligned with each-other.d. Checked with adequate pressure on the measuring instrument.

5. Accuracy of a Measuring Instrument is linked with National Standards by..a. Standardizationb. Equipment Capability (R & R)c. Traceabilityd. Quality Manual & Procedures.

6. During Measurements with Test Instrument; Precision and Accuracy meana. The Sameb. Consistency & Correctnessc. Exactness & Traceability.d. None of the above.

7. Hole, Boss, Tapered Bore, Surface and Axis describe..a. Geometric Elementsb. Features of Elements.c. Mathematically & logically derived figures.d. None of the above.

8. Circle, Cylinder, Cone, Plane etc. describe..a. Geometric Elementsb. Features of Elements.c. Form Errors.d. None of the above.

9. Select Physical Elements from the list below..Point Sphere Apex of a Cone ParallelismLine Plane Sphere Resultant Int. ElementsCone Gauge point PCD Cylinder

Cartesian Planes / Axis Circularity Circle Flatness


2/5

Academy for

Dimensional

Metrology

10. Select Mathematical Elements from the list below..Point Sphere Apex of a Cone ParallelismLine Plane Sphere Resultant Int. ElementsCone Gauge point PCD CylinderCartesian Planes / Axis Circularity Circle Flatness

11. Select Theoretical Elements from the list below..Point Sphere Apex of a Cone ParallelismLine Plane Sphere Resultant Int. ElementsCone Gauge point PCD CylinderCartesian Planes / Axis Circularity Circle Flatness

12. Select Form Errors from the list below..Point Sphere Apex of a Cone ParallelismLine Plane Sphere Resultant Int. ElementsCone Gauge point PCD CylinderCartesian Planes / Axis Circularity Circle Flatness

13. Point Class elements are those whose position in a ref system can be defined by..

a. Directional Cosinesb. X-Y-Z Coordinates of their Centres.c. Projecting on to suitable theoretical plane.d. None of the above.

14. Vector Class elements are those whose position in a ref system can be defined by..a. Directional Cosinesb. X-Y-Z Coordinates of their Centres.c. Projecting on to suitable theoretical plane.d. None of the above.

15. For Spatial / Primary Alignment (Orientation) we necessarily have to usea. Two Point Class Elementb. One Vector Class Element

c. One Vector & One Point Class Elements.d. One Vector & Two Point Class Elements.

16. For Secondary Alignment (Rotation) we can usea. One Point Class Elementb. One Vector Class Elementc. One Vector & One Point Class Elements.d. One Vector & Two Point Class Elements.

17. Cartesian Ref. System consists ofa. Two axes perpendicular to each other.b. Three axis perpendicular to each otherc. A Radius and an Angle & can be defined by R d. X, Y & Z machine axis.

18. Polar coordinate System consists ofa. Two axes at an angle of 90to each other at a fixed Radius.b. Three axis perpendicular to each otherc. A Radius and an Angle & can be defined by R d. X, Y & Z machine axis.

19. Cylindrical coordinate System consists ofa. Two Cartesian & One Polar coordinateb. Two Polar & One Cartesian Coordinatec. One Cartesian & One Polar Coordinated. None of those.

20. Example of a 3D ref system is..a. Polar Chart

b. X-bar & R Chartc. Cartesian System & a CMMd. Radar Screen.


3/5

Academy for

Dimensional

Metrology

21. Identify Resultant Elements

Intersection of Resultant ElementTwo Non-Parallel Lines in space Point Line Circle Ellipse None

Line (Non-Parallel) with a Plane Point Line Circle Ellipse NoneLine Parallel to a Plane Point Line Circle Ellipse NoneTwo Non-parallel Planes Point Line Circle Ellipse NoneThree Planes (Orthogonal) Point Line Circle Ellipse NonePlane Perpendicular to a Cylinder / Cone Point Line Circle Ellipse NonePlane Inclined to a Cylinder / Cone Point Line Circle Ellipse NoneLine piercing a Cylinder Point Line Circle Ellipse NonePlane with a Sphere Point Line Circle Ellipse None

22. Solve following triangle (Using Pythagoras Method) & complete the table.

23. Referring to the table given, answer following

When Sin (30) = 0.500

Cos (30) = 0.866Tan (30) = 0.577

24. Define Vectors shown in the figure..

I J K I J K

A B C

12.50 21.65

30.500 52.828

8.66 10.00

A B C

88.44

86.66

44.00


4/5

Academy for

Dimensional

Metrology

25. Following figure shows 5 holes equally spaced on 100 mm PCD. Calculate & fill in the table forX & Y Coordinates of each hole.

Hole X Y

#1

#2

#3

#4

#5

26. A cutter of 20 mm follows interpolation path as shown. Calculate centre coordinates of thecutter for positions mentioned in the figure below.

CutterPosition

X Y CutterPosition

X Y

#1 #5

#2 #6

#3 #7

#4 #8


5/5

Academy for

Dimensional

Metrology

27. Identify the statements are True or False

No. Statement True False

1 The Point, where X-Y-Z axes of a CMM are equal to Zero, is called as Machine

Origin

2 Part and the machine reference systems are the same.

3. During measurements, it is mandatory to preset Zero as origin.

4 Origin once preset, can be shifted to anywhere during inspection procedure.

5 Measurements are more accurate if the Instrument & object are parallel to eachother.

6 Measurement uncertainties always depend on Human Errors.

7 Graphs (Rectangular or Polar) and a Radar Screen are examples of 3Dreference system.

8 CMM makes it possible to create & correlate various reference systems on a

single component.

9 Geometric feature is the one that we mathematically derive from an Elementavailable on component.

10 Polar coordinate system consists of an Angle & a Radius.

28. Complete the sequence

2 15 80 405

3 20 105 2655

29. Identify the wrong (Unmatched) one

Turning Milling Reaming Grinding Drilling

Circle Plane Cone Parallelism Sphere

Concentricity Intersection Parallelism Flatness Squareness

30. Explain briefly what responsibilities & qualities that a CMM / Quality person should possess.

Date: Signature

adm cmm course test 1

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