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Attention to Detail & Accuracy Flashcards

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

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  1. A maintenance technician records the following torque values during a bolt inspection: 42 ft-lbs, 41 ft-lbs, 43 ft-lbs, 42 ft-lbs, and 44 ft-lbs. The specification sheet calls for 42 ± 1 ft-lbs. How many readings are OUT of specification?

    Answer: One

    The acceptable range is 41–43 ft-lbs. The reading of 44 ft-lbs exceeds the upper limit of 43 ft-lbs, so exactly one reading is out of specification. The values 42, 41, 43, and 42 all fall within the allowable range.

  2. A work order specifies replacing a #10-32 UNF fastener. A technician finds a bin labeled '#10-32 UNC' and another labeled '#10-24 UNF.' Why are BOTH options unacceptable substitutes?

    Answer: UNC has a different thread pitch than UNF, and #10-24 UNF has a coarser pitch than the required #10-32

    #10-32 UNF means a #10 diameter with 32 threads per inch in the Unified Fine series. UNC (coarse) has fewer threads per inch than UNF at the same diameter, altering the thread engagement. #10-24 UNF has only 24 threads per inch, not 32 — a different thread pitch despite being UNF. Neither matches the exact specification.

  3. A technician is reviewing a wiring diagram and notes that a component is labeled 'R3' with a value of 4.7 kΩ ±5%. During testing, the measured resistance is 4,512 Ω. Is this component within tolerance?

    Answer: Yes — the component is within the ±5% tolerance band of 4,465 Ω to 4,935 Ω

    4.7 kΩ = 4,700 Ω. A ±5% tolerance means the acceptable range is 4,700 × 0.95 = 4,465 Ω to 4,700 × 1.05 = 4,935 Ω. The measured value of 4,512 Ω falls within this range, so the component is within specification. Note that answer A incorrectly frames the conclusion despite giving correct limit values.

  4. A preventive maintenance log shows the following oil change intervals for a machine: performed at 1,012 hrs, 2,019 hrs, 3,031 hrs, and 4,038 hrs. The specification requires oil changes every 1,000 ± 25 hours of operation. Which interval first fell OUTSIDE the allowable window?

    Answer: Between 2,019 hrs and 3,031 hrs (a gap of 1,012 hrs — outside spec)

    The allowable interval window is 975–1,025 hours. Calculating the actual gaps: 1,012 − 0 = 1,012 hrs (within spec); 2,019 − 1,012 = 1,007 hrs (within spec); 3,031 − 2,019 = 1,012 hrs (within spec); 4,038 − 3,031 = 1,007 hrs (within spec). Wait — recalculate: 3,031 − 2,019 = 1,012 hrs (within 975–1,025). 4,038 − 3,031 = 1,007 hrs (within spec). Actually all intervals are within spec. The correct answer is D.

  5. A technician calibrates a pressure gauge against a reference standard. Five readings are taken: the reference reads 100.0 PSI each time, while the gauge under test reads 99.2, 99.1, 99.3, 99.2, and 99.2 PSI. Which statement BEST characterizes this gauge's performance?

    Answer: Low accuracy, high precision — the readings are consistent with each other but consistently offset from the true value

    Precision refers to the repeatability of measurements; accuracy refers to closeness to the true value. The gauge reads 99.1–99.3 PSI (a tight 0.2 PSI spread), indicating high precision. However, all readings are approximately 0.8 PSI below the true 100.0 PSI reference, indicating a systematic offset and therefore low accuracy. This is a classic case of a biased but repeatable instrument.

  6. A technician receives a parts list specifying 'M8 × 1.25 × 40mm Grade 8.8 hex cap screw, zinc-plated.' The parts room has 'M8 × 1.0 × 40mm Grade 8.8 hex cap screw, zinc-plated' in stock. What is the critical discrepancy that makes this part unacceptable, even though the length and grade match?

    Answer: The thread pitch is 1.0 mm instead of the required 1.25 mm, meaning the fastener will not thread correctly into a 1.25 mm pitch hole

    In metric fastener designations, the number after '×' is the thread pitch in millimeters. M8 × 1.25 has 1.25 mm between threads (coarse pitch), while M8 × 1.0 has 1.0 mm between threads (fine pitch). These are physically incompatible — the fine-pitch bolt cannot be properly threaded into a coarse-pitch hole and vice versa. Using the wrong pitch risks cross-threading, stripped threads, or fastener failure under load.