TOOL AND DIE MAKER CERTIFICATION PRACTICE
EXAM (100 QUESTIONS)
SECTION 1 — PRECISION MEASUREMENT (1–15)
1. What is the primary purpose of a micrometer?
A. Measure angles
B. Measure precise linear dimensions
C. Measure torque
D. Measure surface finish
Micrometers are designed for high-accuracy linear
measurements typically within 0.001 mm or 0.0001 in.
2. A dial indicator is commonly used to measure:
A. Thickness
B. Mass
C. Runout
D. Temperature
Dial indicators are ideal for detecting runout, flatness, and
alignment deviations.
3. What is the least count of a standard vernier caliper?
A. 0.1 mm
B. 0.02 mm
C. 0.5 mm
D. 1 mm
Most standard vernier calipers read to 0.02 mm or 0.001 in.
4. Gauge blocks are primarily used for:
A. Machining deep holes
B. Calibration and precision reference standards
, C. Cutting threads
D. Grinding dies
Gauge blocks provide precision reference lengths for calibration
and inspection.
5. What tool is best for measuring internal bore diameters?
A. Tape measure
B. Vernier height gauge
C. Telescopic gauge
D. Outside micrometer
Telescopic gauges capture internal dimensions and are
measured using a micrometer.
6. A surface plate is commonly made from:
A. Aluminum
B. Granite
C. Copper
D. Stainless steel
Granite provides excellent stability, hardness, and resistance to
corrosion.
7. A sine bar is used to measure:
A. Pressure
B. Angles
C. Hardness
D. Runout
Sine bars and gauge blocks allow highly accurate angle
calculations using trigonometry.
8. Which measuring tool provides the highest precision?
A. Ruler
B. Vernier caliper
C. Dial caliper
, D. Micrometer
Micrometers provide the greatest accuracy among common
hand measuring tools.
9. Which device measures hardness?
A. Tachometer
B. Rockwell tester
C. Height gauge
D. Comparator
Rockwell testers measure hardness by penetration depth under
load.
10. Bore micrometers are designed to measure:
A. External threads
B. Internal diameters
C. Tool wear
D. Surface roughness
Bore micrometers provide accurate measurement of internal
hole diameters.
11. A profilometer measures:
A. Diameter
B. Concentricity
C. Surface roughness
D. Angle
Profilometers scan surface texture to determine roughness
values such as Ra.
12. To check squareness, a machinist uses a:
A. Protractor
B. Surface gauge
C. Try square
EXAM (100 QUESTIONS)
SECTION 1 — PRECISION MEASUREMENT (1–15)
1. What is the primary purpose of a micrometer?
A. Measure angles
B. Measure precise linear dimensions
C. Measure torque
D. Measure surface finish
Micrometers are designed for high-accuracy linear
measurements typically within 0.001 mm or 0.0001 in.
2. A dial indicator is commonly used to measure:
A. Thickness
B. Mass
C. Runout
D. Temperature
Dial indicators are ideal for detecting runout, flatness, and
alignment deviations.
3. What is the least count of a standard vernier caliper?
A. 0.1 mm
B. 0.02 mm
C. 0.5 mm
D. 1 mm
Most standard vernier calipers read to 0.02 mm or 0.001 in.
4. Gauge blocks are primarily used for:
A. Machining deep holes
B. Calibration and precision reference standards
, C. Cutting threads
D. Grinding dies
Gauge blocks provide precision reference lengths for calibration
and inspection.
5. What tool is best for measuring internal bore diameters?
A. Tape measure
B. Vernier height gauge
C. Telescopic gauge
D. Outside micrometer
Telescopic gauges capture internal dimensions and are
measured using a micrometer.
6. A surface plate is commonly made from:
A. Aluminum
B. Granite
C. Copper
D. Stainless steel
Granite provides excellent stability, hardness, and resistance to
corrosion.
7. A sine bar is used to measure:
A. Pressure
B. Angles
C. Hardness
D. Runout
Sine bars and gauge blocks allow highly accurate angle
calculations using trigonometry.
8. Which measuring tool provides the highest precision?
A. Ruler
B. Vernier caliper
C. Dial caliper
, D. Micrometer
Micrometers provide the greatest accuracy among common
hand measuring tools.
9. Which device measures hardness?
A. Tachometer
B. Rockwell tester
C. Height gauge
D. Comparator
Rockwell testers measure hardness by penetration depth under
load.
10. Bore micrometers are designed to measure:
A. External threads
B. Internal diameters
C. Tool wear
D. Surface roughness
Bore micrometers provide accurate measurement of internal
hole diameters.
11. A profilometer measures:
A. Diameter
B. Concentricity
C. Surface roughness
D. Angle
Profilometers scan surface texture to determine roughness
values such as Ra.
12. To check squareness, a machinist uses a:
A. Protractor
B. Surface gauge
C. Try square
