Measurement Tools

Question 1

What is the primary purpose of gauge blocks

A. Direct measurement of parts
B. Calibration of measuring instruments
C. Surface roughness measurement
D. Thread measurement

Answer 1

B. Calibration of measuring instruments

Primary calibration standards known for high accuracy can be combined for various dimensions to verify other measuring tools.

Question 2

When measuring a shaft diameter, what precaution should be taken with a micrometer

A. Measure only at one end
B. Measure at multiple points around circumference
C. Apply maximum pressure
D. Measure only at the end

Answer 2

B. Major app multiple points around circumference

Checks for out of roundness. More representative measurement. Better accuracy identifies variations

Question 3

Which environmental factor? Most effects precision link measuring

A. Air pressure
B. Light and sensity
C. Humidity
D. Temperature

Answer 3

D. Temperature

Thermal expansion effects affects both tool and part standard temp is 20° c requires temperature compensation

Question 4

What is the process of sliding 2 gauge blocks together to form a very close fit called

A. Wringing
B. Lapping
C. Calibration
D. Tempering

Answer 4

A. Wringing

Wringing is a process where gauge blocks adhere to each other due to molecular attraction and surface tension

Question 5

What is the least count of a manually operated micrometer

A. 0.01 mm
B. 0.1 mm
C. 1mm
D. 0.5 mm

Answer 5

A. 0.01 mm

Manually operated micrometers off her precise readings up to 0.01 mm making them highly reliable for fine measurements