LSS Chapt 1 Accuracy, Precision, and Errors in Measurements Quiz

What should the reading on weighing scales be when nothing is placed on them?

• Zero

• One

• Ten

• Hundred

What is zero error?

• An error when an instrument gives a non-zero reading when it should be zero

• An error when an instrument gives a zero reading when it should be non-zero

• An error when an instrument gives a reading exactly equal to the true value

• An error when an instrument gives a reading double the true value

What is the purpose of the tare function in electronic instruments?

• To reset the scale to remove zero error

• To increase the scale's sensitivity

• To decrease the scale's sensitivity

• To double the scale's reading

Which of the following is an example of an instrument with the tare function?

• Electronic balance

• Analog clock

• Mechanical scale

• Thermometer

What is parallax error?

• An error due to incorrect instrument calibration

• An error introduced when the marking on an instrument is viewed from the wrong angle

• An error caused by faulty equipment

• An error due to environmental conditions

How can parallax error be reduced when using a ruler?

• Position the eye at an angle to the ruler

• Position the eye so that the line of sight is perpendicular to the marking on the ruler

• Position the eye above the ruler

• Position the eye below the ruler

What is the term used when multiple readings are very close to one another?

• Accurate

• Precise

• Consistent

• Reliable

What is the main difference between precision and accuracy?

• Precision is about closeness to the true value, accuracy is about consistency.

• Precision is about consistency, accuracy is about closeness to the true value.

• Precision and accuracy are the same.

• Precision is about error, accuracy is about hypothesis.

What does high precision and low accuracy indicate in measurements?

• Readings are close to each other but far from the true value.

• Readings are far from each other and far from the true value.

• Readings are close to each other and close to the true value.

• Readings are far from each other but close to the true value.

What does low precision and high accuracy indicate in measurements?

• Readings are close to each other but far from the true value.

• Readings are far from each other and far from the true value.

• Readings are close to each other and close to the true value.

• Readings are far from each other but close to the true value.