CCT Tools & Equipment Operation 3

Question 1

A calibration technician is using a gage block wringing technique. Which statement best describes proper wringing procedure?

Accepted Answer

Slide and rotate gage blocks together with light overlapping pressure until they adhere

Answer

Proper wringing involves sliding and slightly rotating the blocks together so molecular adhesion and atmospheric pressure create a near-zero gap bond.

Question 2

Which type of pressure transducer output signal is most immune to electrical noise in long cable runs to a calibration data system?

Accepted Answer

4-20 mA current loop output

Answer

A 4-20 mA current loop signal maintains constant current regardless of cable resistance, making it far more noise-immune than voltage signals over long runs.

Question 3

When verifying the accuracy of a calibrated pipette, which gravimetric standard is used to convert measured mass to volume?

Accepted Answer

The density of distilled water at the test temperature

Answer

Gravimetric pipette calibration uses the known density of distilled water at the test temperature to convert the weighed dispensed mass to volume.

Question 4

A signal generator's frequency output is verified against a frequency counter traceable to a primary frequency standard. The generator reads 10.000 MHz but the counter shows 9.998 MHz. The generator error is:

Accepted Answer

-200 Hz (-0.002%)

Answer

The generator outputs 9.998 MHz but indicates 10.000 MHz, so its actual output is 200 Hz low, giving an error of -200 Hz or -0.002%.

Question 5

For calibrating a hardness tester (Rockwell scale), which reference standard is applied?

Accepted Answer

Certified hardness test blocks with known hardness values

Answer

Certified hardness reference blocks with traceable hardness values are used to verify and calibrate hardness tester performance at each scale.

(CCT) Certified Calibration Technician Practice Test

(CCT) Certified Calibration Technician Practice Test

CCT Tools & Equipment Operation 3