Physics ยท General Awareness

Physics Measuring Instruments

1,123 Questions

Physics measuring instruments are essential tools used to measure various physical quantities. This topic covers devices like hygrometers, oscilloscopes, and sphygmomanometers. It is a highly scoring section in general science and general awareness examinations.

Pressure and humidity instrumentsElectrical measuring devicesMedical physics toolsNavigational instruments

Physics Measuring Instruments Questions

Multiple choice

Which of the following is a type of sensor used to measure temperature?

  1. Thermocouple

  2. Strain Gauge

  3. Photodiode

  4. Hall Effect Sensor
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A thermocouple is a type of sensor used to measure temperature by converting the temperature difference between two dissimilar metals into an electrical signal.

Multiple choice

Which of the following is a type of instrument used to measure power?

  1. Wattmeter

  2. Voltmeter

  3. Ammeter

  4. Ohmmeter
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A wattmeter is a type of instrument used to measure power by measuring the voltage and current in a circuit.

Multiple choice

What is the name of the device used to measure the speed of a swimming pool?

  1. Stopwatch

  2. Tachometer

  3. Speedometer

  4. Flow meter
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A flow meter is a device used to measure the speed of a swimming pool by measuring the flow rate of water.

Multiple choice

What is the name of the device used to maintain the pH level of swimming pools?

  1. pH meter

  2. pH adjuster

  3. pH controller

  4. pH stabilizer
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A pH controller is a device used to maintain the pH level of swimming pools by automatically adding chemicals to adjust the pH.

Multiple choice

What is the name of the device used to test the water quality of swimming pools?

  1. Water test kit

  2. Pool tester

  3. Water analyzer

  4. Water quality monitor
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A water test kit is a device used to test the water quality of swimming pools by measuring the levels of various chemicals, such as chlorine, pH, and alkalinity.

Multiple choice

How is the water pressure inside a penstock measured?

  1. Using a pressure gauge

  2. Using a flow meter

  3. Using a thermometer

  4. Using a voltmeter
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pressure gauges are used to measure the water pressure inside a penstock. These gauges are installed at various points along the penstock to monitor the pressure and ensure that it remains within safe limits.

Multiple choice

Which kitchen tool is used to measure and pour liquid ingredients accurately?

  1. Measuring Cup

  2. Measuring Spoon

  3. Kitchen Scale

  4. Graduated Cylinder
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Measuring cups are commonly used in cooking to measure and pour liquid ingredients accurately, ensuring the correct proportions in recipes.

Multiple choice

Which of the following is a measure of the consistency of a measurement instrument?

  1. Validity.

  2. Reliability.

  3. Sensitivity.

  4. Specificity.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Reliability refers to the consistency of a measurement instrument in producing the same results under similar conditions.

Multiple choice

In the field of sensors, ceramics are employed for the detection of:

  1. Temperature

  2. Pressure

  3. Humidity

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Ceramics are used in sensor applications due to their high sensitivity, stability, and ability to operate in harsh environments.

Multiple choice

Which instrument is used to measure the velocity of flowing water?

  1. Current meter

  2. Flowmeter

  3. Velocity rod

  4. Pitot tube
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A current meter is a device used to measure the velocity of flowing water. It consists of a propeller or impeller that rotates in proportion to the speed of the water.

Multiple choice

Which instrument is used to measure the amount of sediment suspended in water?

  1. Turbidimeter

  2. Secchi disk

  3. Flowmeter

  4. Current meter
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A turbidimeter is an instrument used to measure the amount of suspended sediment in water. It works by measuring the amount of light that is scattered by the suspended particles.

Multiple choice

What is the purpose of a rain gauge?

  1. Measuring rainfall intensity

  2. Measuring rainfall duration

  3. Measuring rainfall volume

  4. Measuring rainfall acidity
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A rain gauge is an instrument used to measure the amount of rainfall that falls in a given location. It consists of a container that collects the rainwater and a graduated scale that is used to measure the volume of the collected water.

Multiple choice

Which instrument is used to measure the temperature of water?

  1. Thermometer

  2. Barometer

  3. Hydrometer

  4. Current meter
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A thermometer is an instrument used to measure the temperature of a substance. It consists of a bulb that contains a liquid, such as mercury or alcohol, that expands or contracts with changes in temperature.

Multiple choice

What is the principle of operation of a flowmeter?

  1. Measuring the velocity of flowing water

  2. Measuring the pressure difference between two points

  3. Measuring the weight of flowing water

  4. Measuring the electrical conductivity of water
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A flowmeter is an instrument used to measure the flow rate of a fluid. It works by measuring the velocity of the flowing fluid and then calculating the flow rate based on the velocity and the cross-sectional area of the pipe or channel.

Multiple choice

What is the purpose of a hydrometer?

  1. Measuring the density of a liquid

  2. Measuring the specific gravity of a liquid

  3. Measuring the viscosity of a liquid

  4. Measuring the surface tension of a liquid
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A hydrometer is an instrument used to measure the density of a liquid. It consists of a float that is calibrated to sink to a certain depth in a liquid, depending on the density of the liquid.