CST Analog & Digital Scale Technology 4

Question 1

When performing a shift (off-center load) test on a platform scale, test weights are placed:

Accepted Answer

At multiple off-center positions across the platform surface

Answer

A shift test places a standard test load at multiple off-center positions sequentially to verify the scale reads the same regardless of load placement.

Question 2

The excitation voltage supplied to a strain gauge load cell by the digital indicator is typically:

Accepted Answer

5 to 15 V DC

Answer

Digital indicators supply 5–15 V DC excitation to load cells; this powers the Wheatstone bridge and determines the full-scale output signal.

Question 3

What does 'NTEP Certificate of Conformance' signify for a commercial scale?

Accepted Answer

The scale type has been evaluated and found to meet NIST Handbook 44 requirements

Answer

An NTEP Certificate of Conformance (CC) means the scale design has been tested and approved as conforming to NIST Handbook 44 for legal-for-trade use in the US.

Question 4

Which component in an analog spring scale directly converts the applied force into pointer deflection?

Accepted Answer

Helical or flat return spring

Answer

The helical or flat spring is the primary sensing element that deflects proportionally to the applied weight, driving the pointer across the graduated dial.

Question 5

A legal-for-trade digital scale must have its calibration parameters protected against unauthorized changes by:

Accepted Answer

A calibration security seal or software security access event log

Answer

NIST Handbook 44 requires that calibration parameters be secured by a physical seal or an audit trail event log so any changes are detectable.

(CST) Certified Scale Technicians Practice Test

(CST) Certified Scale Technicians Practice Test

CST Analog & Digital Scale Technology 4