[Solved] Precision MCQ [Free PDF] - Objective Question Answer for Precision Quiz - Download Now! (2024)

1. Repeatability
2. Reliability
3. Uncertainity
4. Accuracy

Precision:It is the measure of reproducibility i.e., given a fixed value of a quantity, precision is a measure of the degree of agreement within a group of measurements.

• Precision of an instrument does not guarantees accuracy
• An instrument with more significant figures has more precision
• Deflection factor is reciprocal of sensitivity

Additional Information

Sensitivity:The sensitivity denotes the smallest change in the measured variable to which the instrument responds. It is defined as the ratio of the changes in the output of an instrument to a change in the value of the quantity to be measured.

Accuracy:It is the degree of closeness with which the reading approaches the true value of the quantity to be measured.

Get Started for Free

Trusted by 5.4 Crore+ Students

1. It is an instrument's degree of freedom from random errors.
2. It is the closeness of output readings for the same input when there are changes in the observer, locations, measuring instruments, etc.
3. It is the degree of closeness of a measurement compared to the expected value.
4. It is the closeness of output readings, when the same input is applied repetitively over a short period of time.

Reproducibility:

• It is the degree of closeness with which a given value may be repeatedly measured. It may be specified in terms of units for a given period of time. Hence option (2) matches the definition of reproducibility i.e. it is the closeness of output readings for the same input when there are changes in the observer, locations, measuring instruments, etc.
• Perfect reproducibility means that the instrument has no drift.
• No driftmeans that with a given input the measured values do not vary with time.

Additional Information

Drift:It indicates the variation of the output with time. No drift means that with a given input the measured values don’t vary with time.

Factors that cause drift are stray electric and magnetic fields, thermal EMFs, changes in temperature, mechanical vibrations, wearand tear and high mechanical stresses developed in some parts of the instruments, etc.

Get Started for Free

Trusted by 5.4 Crore+ Students

1. 0.95
2. 0.1
3. 0.99
4. 0.9

Concept:

Precision: A measurement of consistency or repeatability of measurement i.e., successive reading does not differ.

The average of the measured value is given by,

\(\overline {{X_n}} = \sum \frac{{{X_n}}}{n}\)

Where X_nis the recordedreadings, n is no. of recorded readings.

Precision for particular reading is given by,

Precision\( = 1 - \left| {\frac{{Respective\;Reading - \overline {{X_n}} }}{{\overline {{X_n}} }}} \right|\)

Calculation:

The average measurement value

\(\overline {{X_n}} = \frac{{98 + 101 + 99 + 100 + 102}}{5}\)

\(= \frac{{500}}{5} = 100\)

Given third measurement reading = 99

The 3rd reading precision is given as

\(= 1 - \left| {\frac{{99 - 100}}{{100}}} \right|\)

\( = 1 - \frac{1}{{100}} = 0.99\)

Get Started for Free

Trusted by 5.4 Crore+ Students

1. precision is the indication ofthe degree of closeness between the measured values.
2. an instrument with high precision will always give accurate readings
3. an high accuracy instrument is always a precision instrument.
4. none of the above

Precision:

• Precision is the indication ofthe degree of closeness between the measured values.
• Precision is also the measurement of repeatability (or) reproducibility.
• For a good instrument, high precision is preferred when the measured values are very close.
• A high precision instrument may or may not be accurate i.e, precision doesn't give the guarantee about accuracy.
• But ahigh accuracy instrument is a precision instrument i.e, accuracy guaranteesprecision.

Get Started for Free

Trusted by 5.4 Crore+ Students

1. 1, 2 and 3
2. 1 and 2 only
3. 1 and 3 only
4. 2 and 3 only

Precision: The most repeatable value (or) the reproducible value out of the set of records is known as precision. It is the measure of consistency. It gives the closeness of individual measured value to the average of all measured values.

The precision of an instrument does not guarantee accuracy. The precision can be achieved without accuracy. So, it is independent of the realizable correctness of the measurement

An instrument with more significant figures has more precision and hence precision is usually described in terms of number of digits used in the measurement by a digital instrument.

Get Started for Free

Trusted by 5.4 Crore+ Students

Precision Question 6

1. 0.95
2. 0.1
3. 0.99
4. 0.9

Precision Question 6 Detailed Solution

Concept:

Precision: A measurement of consistency or repeatability of measurement i.e., successive reading does not differ.

The average of the measured value is given by,

\(\overline {{X_n}} = \sum \frac{{{X_n}}}{n}\)

Where X_nis the recordedreadings, n is no. of recorded readings.

Precision for particular reading is given by,

Precision\( = 1 - \left| {\frac{{Respective\;Reading - \overline {{X_n}} }}{{\overline {{X_n}} }}} \right|\)

Calculation:

The average measurement value

\(\overline {{X_n}} = \frac{{98 + 101 + 99 + 100 + 102}}{5}\)

\(= \frac{{500}}{5} = 100\)

Given third measurement reading = 99

The 3rd reading precision is given as

\(= 1 - \left| {\frac{{99 - 100}}{{100}}} \right|\)

\( = 1 - \frac{1}{{100}} = 0.99\)

Get Started for Free

Trusted by 5.4 Crore+ Students

Precision Question 7

1. Repeatability
2. Reliability
3. Uncertainity
4. Accuracy

Precision Question 7 Detailed Solution

Precision:It is the measure of reproducibility i.e., given a fixed value of a quantity, precision is a measure of the degree of agreement within a group of measurements.

• Precision of an instrument does not guarantees accuracy
• An instrument with more significant figures has more precision
• Deflection factor is reciprocal of sensitivity

Additional Information

Sensitivity:The sensitivity denotes the smallest change in the measured variable to which the instrument responds. It is defined as the ratio of the changes in the output of an instrument to a change in the value of the quantity to be measured.

Accuracy:It is the degree of closeness with which the reading approaches the true value of the quantity to be measured.

Get Started for Free

Trusted by 5.4 Crore+ Students

Precision Question 8

1. It is an instrument's degree of freedom from random errors.
2. It is the closeness of output readings for the same input when there are changes in the observer, locations, measuring instruments, etc.
3. It is the degree of closeness of a measurement compared to the expected value.
4. It is the closeness of output readings, when the same input is applied repetitively over a short period of time.

Precision Question 8 Detailed Solution

Reproducibility:

• It is the degree of closeness with which a given value may be repeatedly measured. It may be specified in terms of units for a given period of time. Hence option (2) matches the definition of reproducibility i.e. it is the closeness of output readings for the same input when there are changes in the observer, locations, measuring instruments, etc.
• Perfect reproducibility means that the instrument has no drift.
• No driftmeans that with a given input the measured values do not vary with time.

Additional Information

Drift:It indicates the variation of the output with time. No drift means that with a given input the measured values don’t vary with time.

Factors that cause drift are stray electric and magnetic fields, thermal EMFs, changes in temperature, mechanical vibrations, wearand tear and high mechanical stresses developed in some parts of the instruments, etc.

Get Started for Free

Trusted by 5.4 Crore+ Students

Precision Question 9

1. 1, 2 and 3
2. 1 and 2 only
3. 1 and 3 only
4. 2 and 3 only

Precision Question 9 Detailed Solution

Precision: The most repeatable value (or) the reproducible value out of the set of records is known as precision. It is the measure of consistency. It gives the closeness of individual measured value to the average of all measured values.

The precision of an instrument does not guarantee accuracy. The precision can be achieved without accuracy. So, it is independent of the realizable correctness of the measurement

An instrument with more significant figures has more precision and hence precision is usually described in terms of number of digits used in the measurement by a digital instrument.

Get Started for Free

Trusted by 5.4 Crore+ Students

Precision Question 10

1. Conformity
2. Meter error
3. Inertia Effects
4. Noise

Precision Question 10 Detailed Solution

Precision:

• Precisionis the degree of exactness for which the instrument is designed.
• Precisioncomposed of two characteristics:conformityandsignificant figures.
• More significant figures, estimated precision is more.

• It is a measure of the reproducibility of the measurements, i.e. given a fixed value of quantity.
• It is a measure of the degree of agreement within a group of measurements.

Get Started for Free

Trusted by 5.4 Crore+ Students

1. precision is the indication ofthe degree of closeness between the measured values.
2. an instrument with high precision will always give accurate readings
3. an high accuracy instrument is always a precision instrument.
4. none of the above

Precision:

• Precision is the indication ofthe degree of closeness between the measured values.
• Precision is also the measurement of repeatability (or) reproducibility.
• For a good instrument, high precision is preferred when the measured values are very close.
• A high precision instrument may or may not be accurate i.e, precision doesn't give the guarantee about accuracy.
• But ahigh accuracy instrument is a precision instrument i.e, accuracy guaranteesprecision.

Get Started for Free

Trusted by 5.4 Crore+ Students

1. 0.95
2. 0.1
3. 0.99
4. 0.9

Concept:

Precision: A measurement of consistency or repeatability of measurement i.e., successive reading does not differ.

The average of the measured value is given by,

\(\overline {{X_n}} = \sum \frac{{{X_n}}}{n}\)

Where X_nis the recordedreadings, n is no. of recorded readings.

Precision for particular reading is given by,

Precision\( = 1 - \left| {\frac{{Respective\;Reading - \overline {{X_n}} }}{{\overline {{X_n}} }}} \right|\)

Calculation:

The average measurement value

\(\overline {{X_n}} = \frac{{98 + 101 + 99 + 100 + 102}}{5}\)

\(= \frac{{500}}{5} = 100\)

Given third measurement reading = 99

The 3rd reading precision is given as

\(= 1 - \left| {\frac{{99 - 100}}{{100}}} \right|\)

\( = 1 - \frac{1}{{100}} = 0.99\)

Get Started for Free

Trusted by 5.4 Crore+ Students

1. Repeatability
2. Reliability
3. Uncertainity
4. Accuracy

Precision:It is the measure of reproducibility i.e., given a fixed value of a quantity, precision is a measure of the degree of agreement within a group of measurements.

• Precision of an instrument does not guarantees accuracy
• An instrument with more significant figures has more precision
• Deflection factor is reciprocal of sensitivity

Additional Information

Sensitivity:The sensitivity denotes the smallest change in the measured variable to which the instrument responds. It is defined as the ratio of the changes in the output of an instrument to a change in the value of the quantity to be measured.

Accuracy:It is the degree of closeness with which the reading approaches the true value of the quantity to be measured.

Get Started for Free

Trusted by 5.4 Crore+ Students

1. It is an instrument's degree of freedom from random errors.
2. It is the closeness of output readings for the same input when there are changes in the observer, locations, measuring instruments, etc.
3. It is the degree of closeness of a measurement compared to the expected value.
4. It is the closeness of output readings, when the same input is applied repetitively over a short period of time.

Reproducibility:

• It is the degree of closeness with which a given value may be repeatedly measured. It may be specified in terms of units for a given period of time. Hence option (2) matches the definition of reproducibility i.e. it is the closeness of output readings for the same input when there are changes in the observer, locations, measuring instruments, etc.
• Perfect reproducibility means that the instrument has no drift.
• No driftmeans that with a given input the measured values do not vary with time.

Additional Information

Drift:It indicates the variation of the output with time. No drift means that with a given input the measured values don’t vary with time.

Factors that cause drift are stray electric and magnetic fields, thermal EMFs, changes in temperature, mechanical vibrations, wearand tear and high mechanical stresses developed in some parts of the instruments, etc.

Get Started for Free

Trusted by 5.4 Crore+ Students

1. Sensitivity
2. Resolution
3. Accuracy
4. Precision
5. Repeatability

Some of the important characteristics of measuring instruments are specified by using the following terms:

Precision:

• It is a measure of thereproducibilityof the measurements.
• Given a fixed value of avariable, precision is ameasure of the degreeto whichsuccessive measurements differ fromone another i.e., a measure of reproducibility or agreement with each other for multiple trials.

Precision is composed oftwocharacteristics:conformity and the number of significant figures to which measurement may be made.

• Conformity:It is the ability of an instrument to produce the same reading, or it is the degree of similarity between the individual measurements.
• So,it is also called repeatability or reproducibilityand the number of significant figures.

Mathematically, Precisionis expressed as “the absolute maximum deviation from the average of the readings”, i.e.

Precision = max {(VAV- VMIN), (VMAX- VAV)}

Accuracy:

• It is theclosenessto the true value; closeness with which an instrument readingapproaches the true or accepted value of the variable (quantity) being measured.
• It isconsidered to be anindicatorof the total error in the measurement without looking into thesources of errors.

Sensitivity:Itthe ability of the measuring instrument to respond to changes in the measuredquantity. It is expressed as the ratio of the change of output signal or response of theinstrument to a change of input or measured variable.

Resolution:Itis the smallest change in measured value to which the instrument will respond, i.e. the smallest incremental quantity that can be reliably measured.
Error:It is the deviation from the true value of the measured variable.

Get Started for Free

Trusted by 5.4 Crore+ Students