Precision Core Knowledge and Fundamentals 3 — Questions and Answers
Question 1: In the context of quality control, what does 'Six Sigma' primarily aim to reduce?
- Production speed
- Defects and process variation (Correct answer)
- Employee headcount
- Material costs
Correct answer: Defects and process variation
Six Sigma is a data-driven methodology aimed at reducing defects and process variation to near-zero levels.
Question 2: Which type of screw drive requires a cross-shaped driver with a tapered tip?
- Torx
- Hex (Allen)
- Phillips (Correct answer)
- Slotted
Correct answer: Phillips
A Phillips head screw has a cross-shaped recess that accepts the tapered cross tip of a Phillips screwdriver.
Question 3: What is the correct way to measure the diameter of a cylinder using a micrometer?
- Measure at one point only across the widest part
- Measure at multiple points along the length and rotation (Correct answer)
- Measure from the outside edge to the center
- Measure only at the ends of the cylinder
Correct answer: Measure at multiple points along the length and rotation
Measuring at multiple points along the length and at different rotational positions detects taper, out-of-round, and other dimensional variations.
Question 4: What does ISO stand for in the context of international standards?
- International Standards Organization
- International Organization for Standardization (Correct answer)
- Integrated Systems Operations
- Industrial Safety Oversight
Correct answer: International Organization for Standardization
ISO stands for International Organization for Standardization, the body that publishes international standards across industries.
Question 5: In a series electrical circuit, what happens to the total resistance when more resistors are added?
- Total resistance decreases
- Total resistance stays the same
- Total resistance increases (Correct answer)
- Total resistance becomes zero
Correct answer: Total resistance increases
In a series circuit, total resistance equals the sum of all individual resistances, so adding more increases the total.
Question 6: Which type of file cut is best suited for rapid material removal on soft metals?
- Dead smooth cut
- Bastard cut
- Double cut (Correct answer)
- Second cut
Correct answer: Double cut
A double-cut file has two sets of crossing teeth that remove material faster, making it ideal for rapid stock removal.
Question 7: What is the purpose of a pilot hole when drilling into hard materials?
- To mark the center point for aesthetics
- To guide the larger drill bit and reduce stress (Correct answer)
- To create airflow during drilling
- To test the drill bit sharpness
Correct answer: To guide the larger drill bit and reduce stress
A pilot hole guides the larger drill bit accurately and reduces the lateral force and stress on the bit, preventing wandering and breakage.
Precision Core Knowledge and Fundamentals 3
In the context of quality control, what does 'Six Sigma' primarily aim to reduce?