MSSC CPT flashcards

32 cards. Read the term and the definition here. The deck at the top of this page is optional.

Lockout/Tagout Sequence

A six-step energy control process: notify affected employees, shut down equipment, isolate energy sources, apply locks and tags, release stored energy, and verify zero energy before servicing.

Fire Class B

Fires involving flammable liquids and gases such as gasoline, solvents, and propane. They are extinguished with foam, carbon dioxide, or dry chemical, never a water stream.

GFCI Trip Level

A ground-fault circuit interrupter opens the circuit at about 4 to 6 milliamps of leakage current, protecting workers from shock levels that can cause cardiac or respiratory arrest.

Hearing Conservation Program Trigger

OSHA requires a hearing conservation program when noise exposure reaches an 8-hour time-weighted average of 85 dBA. The permissible exposure limit is 90 dBA.

SDS Sixteen Sections

A GHS safety data sheet contains 16 sections covering identification, hazards, composition, first aid, firefighting, handling and storage, exposure controls, physical properties, stability, toxicity, disposal, and transport.

Fall Protection Heights

General industry requires fall protection at 4 feet above a lower level; construction requires it at 6 feet. Guardrails, nets, or personal fall arrest systems satisfy the requirement.

Confined Space Oxygen Range

Acceptable atmospheric oxygen for entry is 19.5 to 23.5 percent. Readings outside that range require ventilation, retesting, and entry under a permit.

Point of Operation Guarding

The area where work is performed on a machine must be protected by barrier guards, safeguarding devices such as light curtains, or holdback restraints so no body part can enter.

Control Chart Limits

Upper and lower control limits sit three standard deviations from the process mean, capturing about 99.7 percent of common-cause variation and signaling when special causes appear.

Cp Formula

Process capability ratio equals specification width divided by six sigma: Cp = (USL - LSL) / 6 sigma. It measures spread only and ignores how well the process is centered.

Cpk Formula

Capability index equals the smaller of (USL - mean) or (mean - LSL) divided by 3 sigma. It penalizes a process that is off-center and is always less than or equal to Cp.

Pareto Principle

Roughly 80 percent of problems come from 20 percent of causes. A Pareto chart ranks causes by frequency or cost so improvement effort targets the vital few.

Fishbone Six M Categories

Cause-and-effect analysis sorts potential causes into manpower, machine, material, method, measurement, and mother nature (environment) to ensure the search is not one-sided.

Gage R&R Acceptance

Measurement variation below 10 percent of tolerance is acceptable, 10 to 30 percent is conditionally acceptable depending on risk, and above 30 percent requires gage or method improvement.

Accuracy Versus Precision

Accuracy is closeness to the true value; precision is repeatability among repeated readings. A gage can be very precise yet inaccurate if it is out of calibration.

Six Sigma Defect Rate

A six-sigma process produces no more than 3.4 defects per million opportunities, equivalent to 99.99966 percent yield and roughly two defects per billion opportunities per side.

Takt Time Formula

Takt time equals available production time divided by customer demand rate. It sets the pace each process must meet to fill orders without overproduction or overtime.

OEE Formula

Overall equipment effectiveness equals availability multiplied by performance multiplied by quality, expressed as a percentage. A world-class benchmark is approximately 85 percent.

Seven Wastes TIMWOOD

Transportation, inventory, motion, waiting, overproduction, overprocessing, and defects. Overproduction is considered worst because it hides and creates the other six wastes.

Five S Workplace Organization

Sort, set in order, shine, standardize, and sustain. The method removes unneeded items, assigns locations, cleans to expose abnormalities, and locks in the new standard.

Kanban Pull Signal

A card or electronic signal that authorizes upstream production or replenishment of one container. It replaces forecast-based push scheduling with consumption-driven replenishment.

Theory of Constraints Bottleneck

The slowest operation sets total system throughput. Improving capacity anywhere other than the bottleneck adds no output until the bottleneck itself is elevated.

Turning Versus Milling

Turning rotates the workpiece against a single-point tool on a lathe; milling rotates a multi-tooth cutter while the workpiece is fed linearly past it.

SMED Changeover

Single-minute exchange of die reduces setup time by converting internal tasks performed while the machine is stopped into external tasks completed while it still runs.

TPM Autonomous Maintenance

Operators clean, inspect, lubricate, and tighten their own equipment, detecting deterioration early and freeing maintenance technicians for complex repairs and improvement work.

Predictive Maintenance

Condition-based tasks such as vibration analysis, thermography, oil analysis, and ultrasound that trigger repairs when measured indicators reveal a developing fault before failure.

MTBF Formula

Mean time between failures equals total operating time divided by the number of failures. A higher value indicates greater equipment reliability over the operating period.

Availability Formula

Availability equals MTBF divided by the sum of MTBF and MTTR. Reducing mean time to repair raises uptime without altering the equipment's underlying reliability.

Hydraulic Contamination Cause

An estimated 70 to 80 percent of hydraulic system failures come from contaminated fluid, so filters, breathers, reservoir cleaning, and fluid sampling are critical practices.

Bearing Failure Causes

Misalignment, imbalance, contamination, inadequate or excessive lubrication, and improper mounting are the leading causes of premature bearing failure in rotating equipment.

FRL Unit Function

A filter-regulator-lubricator assembly removes water and dirt from compressed air, sets the line pressure, and adds oil mist to protect downstream pneumatic components.

CMMS Purpose

A computerized maintenance management system tracks work orders, preventive schedules, spare parts inventory, and equipment repair history to support planning and reliability analysis.