HV Calibration Quiz

What is the recommended level of confidence for expressing the expanded uncertainty?

• 90%

• 95%

• 99%

• 85%

Answer explanation

means that we are always 2.5% unsure of the end limits of the measurement after the complete uncertainty estimation process has been done

Which method is NOT used to determine the sensitivity coefficients of the measurand?

• Numerical method

• Experimental method

• Statistical method

• Analytical method

What type of uncertainty is evaluated by statistical analysis of series of measurements?

• Type A uncertainty

• Type B uncertainty

• Combined uncertainty

• Expanded uncertainty

What is the first step in the 9-Step Expanded Uncertainty Estimation?

• Calculating the effective degrees of freedom

• Calculating the combined standard uncertainty

• Establishing the model and identifying influence factors

• Determining the coverage factor

What does the coverage factor, k, depend on?

• The reference readings

• The type of uncertainty

• The number of degrees of freedom

• The model function

Which of the following is NOT a component of the calibration results?

• Calibration history

• Reference readings

• Calibration manager

• Certificate details

What is the purpose of the expanded uncertainty?

• To calculate the mean value

• To determine the standard deviation

• To evaluate the reference readings

• To express the uncertainty in the measurand

What is the formula used to calculate the combined standard uncertainty?

• U_c = u_i + k

• U_c = u_i * k

• U_c = Σu_i

• U_c = √(Σu_i^2)

Which type of uncertainty is evaluated by means other than statistical analysis?

• Standard uncertainty

• Type B uncertainty

• Combined uncertainty

• Type A uncertainty

What is the effective degrees of freedom used for?

• To calculate the expanded uncertainty

• To determine the level of confidence

• To evaluate the reference readings

• To assess the reliability of standard uncertainty