1. A

Precision alignment minimizes mechanical vibration and friction, extending the operational life of machinery.

2. B

A dial indicator provides the highest precision in measuring misalignment in rotating machinery.

3. B

A leveled baseplate ensures proper load distribution and accurate alignment during gearbox installation.

4. B

A straightedge and feeler gauges can detect high or low spots on a foundation surface.

5. A

Air bubbles or misalignment can cause vibration in hydraulic couplings.

6. B

Soft foot correction ensures all machine feet sit evenly, preventing distortion during tightening.

7. C

Protective gear prevents injuries from flying fragments or sudden bearing release.

8. C

A vibration peak at 1× speed commonly signals unbalance in the rotating element.

9. B

The reverse dial method requires readings at four points to calculate both angular and offset misalignment.

10. A

Precision alignment tolerances are typically set around ±0.001 inch per inch of coupling diameter.

11. C

A “blue check” involves using Prussian blue to identify high spots between mating surfaces.

12. B

Uncorrected soft foot causes strain and misalignment that lead to early coupling failure.

13. B

Hot alignment compensates for thermal growth once machinery reaches operating temperature.

14. B

Over-tensioning shortens belt life and increases bearing load.

15. C

Rigging safety depends on communication and keeping workers clear of suspended loads.

16. D

Thrust bearings are specifically designed to handle high axial loads.

17. B

Keyways transmit torque and prevent rotational slip between connected components.

18. C

Lubrication must match manufacturer recommendations for type and quantity.

19. B

Stainless steel shims resist corrosion and maintain accurate thickness under load.

20. A

Demonstration combined with clarity reinforces proper handling and safety.

21. B

Harmonics occur at integer multiples of the base vibration frequency.

22. C

Dial indicators detect both offset and angular deviations precisely.

23. B

Blended instruction enhances retention and accommodates diverse learning styles.

24. B

Contaminants erode seals and precision surfaces, leading to failure.

25. A

Shims correct vertical misalignment between coupled components.

26. B

Predictive maintenance relies on identifying potential issues through trend analysis.

27. B

Laser systems provide accurate results quickly with digital precision.

28. A

Safety demands that lifting gear be rated appropriately for the load.

29. C

Star patterns evenly distribute clamping force to prevent distortion.

30. B

Soft starters gradually increase voltage to reduce stress on machinery.

31. C

Compliance requires adherence to applicable safety and procedural standards.

32. A

Clear daily updates prevent delays and miscommunication during shutdowns.

33. B

A job safety analysis identifies hazards and control measures prior to work.

34. A

Mentorship supports skill development and reinforces safety culture.

35. C

Clean mating surfaces guarantee balance and alignment accuracy.

36. B

Practical training ensures understanding and measurable accuracy.

37. B

Gradual torque application helps achieve even bolt tensioning.

38. C

Guards protect workers from entanglement and rotating hazards.

39. C

Gear mesh frequency vibration indicates tooth wear or damage.

40. A

Objectives guide content, instruction, and assessment alignment.

41. A

Observation and feedback ensure competence and retention.

42. B

LOTO ensures energy isolation for safe maintenance.

43. B

Misalignment and unbalance are primary causes of coupling vibration.

44. B

Adaptive mentoring encourages cooperation and learning.