CPM Cheat Sheet 2026

The 30 highest-yield CPM facts, distilled from real exam questions. Print it, save it as a PDF, or study it here — free, no sign-up.

1. What is the role of hazard assessments in plant operations? → To identify and assess risks, leading to the implementation of safety measures.
2. How can plant operators ensure compliance with safety standards? → By following safety protocols, attending training, and reporting unsafe conditions.
3. What tools are commonly used in the installation of mechanical systems? → Wrenches, torque gauges, lifting equipment, and welding machines are commonly used.
4. A mechanic is installing a new V-belt drive. After initial installation and tensioning, what is the recommended best practice regarding belt tension? → Re-tension the belt after a brief run-in period of 24-48 hours.
5. What does a high-pitched squealing or screeching sound from a bearing most commonly indicate? → Inadequate lubrication causing metal-to-metal contact
6. What metallurgical phenomenon is responsible for work hardening when a metal is cold-formed or cold-worked? → Increase in dislocation density due to plastic deformation at room temperature
7. When pressing a bearing onto a shaft, force should be applied to which component to avoid damaging the rolling elements? → The inner ring only
8. In large rotating machinery like turbines and generators, what is the specific function of a thrust bearing? → To absorb and manage axial forces along the length of the shaft.
9. What is the primary function of a contactor in a motor control starter circuit? → Switch high-voltage power to the motor coil
10. A mechanical seal in a centrifugal pump creates its primary seal between which two components? → A rotating seal face and a stationary seat
11. Compared to compression packing, the primary operational advantage of a mechanical seal is: → Near-zero leakage during normal operation
12. What is the purpose of annealing a metal part during plant fabrication or repair? → Soften the metal and relieve internal stresses by controlled heating and slow cooling
13. A rigid coupling is the appropriate coupling choice when: → Both shafts are precisely aligned and must act as a single continuous shaft
14. What type of surface defects can liquid penetrant testing (LPT) reliably detect on a fabricated or repaired plant component? → Cracks, laps, seams, and other discontinuities open to the surface
15. How does troubleshooting help in mechanical systems repair? → It identifies the root cause, ensuring repairs address the issue effectively.
16. Which type of seal is most commonly used to prevent leakage past a reciprocating piston inside a hydraulic cylinder? → U-cup piston seal
17. What is the role of quality assurance in mechanical system installation? → It ensures the installation meets standards and performs reliably.
18. Maintaining the correct axial gap (end float) between coupled shaft ends is important primarily because: → It prevents axial thrust loads from being transferred between the two coupled machines
19. What type of rolling element bearing is best suited to handle both high radial loads and moderate axial (thrust) loads simultaneously? → Tapered roller bearing
20. What is the purpose of the acceleration and deceleration ramp settings in a VFD? → Control the rate of speed change to protect the motor and mechanical components
21. What is the purpose of testing equipment after calibration? → To verify that equipment is functioning properly and within required specifications.
22. What is the operating principle of a plasma cutter used in plant fabrication and maintenance? → Uses an ionized high-velocity gas jet to cut electrically conductive metals
23. What does tensile strength represent for a material used in plant equipment fabrication? → The maximum stress a material can withstand before fracturing under tension
24. How can operators contribute to equipment calibration and preventative maintenance? → By reporting performance issues and abnormalities to maintenance staff for further action.
25. When using an induction heater to mount a bearing on a shaft, what is the generally recommended maximum heating temperature? → 110°C (230°F)
26. What is the purpose of back purging with inert gas when welding austenitic stainless steel pipe? → Protect the inside (root) of the weld from oxidation and sugaring
27. Why is proper installation of mechanical systems important? → To ensure the system operates optimally and safely with minimal issues.
28. On an engineering drawing, what type of line is used to represent an edge or feature of an object that is not visible in the current view? → A series of short, evenly spaced dashes
29. What does the acronym MIG stand for in the MIG welding process? → Metal Inert Gas
30. In oxy-acetylene cutting, what is the minimum safe oxygen concentration that must be maintained in a confined work area? → 19.5%