Ramsay Test Attention to Detail & Accuracy 5

Question 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?

Accepted Answer

One

Answer

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.

Question 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?

Accepted Answer

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

Answer

#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.

Question 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?

Accepted Answer

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

Answer

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.

Question 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?

Accepted Answer

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

Answer

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.

Question 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?

Accepted Answer

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

Answer

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.

Ramsay Test Practice Test

Ramsay Test Practice Test

Ramsay Test Attention to Detail & Accuracy 5