Practice True Value Vs Measured Value (2.1) - Accuracy in Measurement - Environmental Quality Monitoring & Analysis, - Vol 1

Practice: True Value vs Measured Value

Lesson 2.1Accuracy in Measurement

Practise this section

10 questions

Flashcard drill
5 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
Sign up to start the exercise
Quiz
4 questions · about 3 min · pass mark 70%. Hints available.
Sign up to start the quiz

6 sample questions

Question 1.
Define true value.
Show hintHide hint
Think about the ideal or perfect measurement.
Question 2.
What is the role of standards in measurements?
Show hintHide hint
Standards are a basis for accuracy.
3Question 3.
What is the true value?
- A) The displayed value
- B) The actual value we aim to measure
- C) The average of multiple readings
Show hintHide hint
Think about what you would consider 'correct'.
4Question 4.
Standards are used for which of the following?
- True
- False
Show hintHide hint
Standards help in verifying accuracy.
Question 5.
A laboratory is consistently receiving a measurement of a pollutant as 20 ppm when using their current calibration. However, a re-evaluation shows inaccurately calibrated instruments were used, leading to a double-check against verified standards. How should the lab proceed?
Show hintHide hint
Think about the steps involved in ensuring reliability once error is discovered.
Question 6.
Consider a scenario where a measuring instrument is calibrated to a known standard, showing consistency over time. However, after one month, the same instrument begins returning divergent values. What strategies can the laboratory employ?
Show hintHide hint
Consider environmental factors that might affect instrument performance.

6 more questions in this section. Enroll free to practise them all.