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Safety Standards & Technical Documentation Flashcards

7 cards from real ISCET practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Safety Standards & Technical Documentation flashcards as text

  1. Which standard governs the flammability ratings of plastic materials used in electronic equipment enclosures (UL ratings)?

    Answer: UL 94

    UL 94 is the Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances, with ratings such as V-0, V-1, V-2, and HB.

  2. When reading a resistor with color bands Orange, Orange, Red, Gold, what is its value and tolerance?

    Answer: 3.3 kΩ ±5%

    Orange=3, Orange=3, Red=×100 multiplier gives 3,300 Ω = 3.3 kΩ; Gold = ±5% tolerance.

  3. What does 'MTTR' stand for in reliability and maintenance documentation?

    Answer: Mean Time To Repair (or Restore)

    MTTR stands for Mean Time To Repair, which measures the average time required to repair a failed component or system and restore it to operation.

  4. In ESD (Electrostatic Discharge) protection, what does an 'ESD Protected Area' (EPA) require?

    Answer: Conductive or dissipative surfaces, grounded personnel, and controlled humidity

    An EPA requires groundable work surfaces, properly grounded personnel via wrist straps or footwear, controlled humidity, and the absence of charge-generating insulators.

  5. What is a 'tolerance stack-up' analysis used for in engineering documentation?

    Answer: Calculating whether combined dimensional tolerances of multiple parts may cause assembly fit or function problems

    Tolerance stack-up (or tolerance analysis) evaluates how individual component dimensional tolerances accumulate in an assembly to determine if the worst-case combination will still meet requirements.

  6. Which type of fire extinguisher is appropriate for electrical equipment fires?

    Answer: Class C (non-conductive agent such as CO₂ or dry chemical)

    Class C extinguishers use non-conductive agents (CO₂, dry chemical, or clean agent) appropriate for energized electrical equipment fires, preventing shock hazard to the user.

  7. What is the purpose of a 'revision history' block in technical documentation?

    Answer: To track changes made to the document over time, including dates, descriptions, and author of each revision

    A revision history block records all document changes chronologically, including revision number, date, description of change, and who made it, ensuring traceability.