Physics ยท General Awareness

Physics Measuring Instruments

1,180 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.

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Physics Measuring Instruments Questions

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.

Multiple choice

Which instrument is used to measure the pH of water?

  1. pH meter

  2. Conductivity meter

  3. Turbidimeter

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

A pH meter is an instrument used to measure the pH of a solution. It consists of a probe that is inserted into the solution and a meter that displays the pH value.

Multiple choice

Which instrument is used to measure the turbidity of 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 turbidity of water. It works by measuring the amount of light that is scattered by the suspended particles in the water.

Multiple choice

What is the principle of operation of a Secchi disk?

  1. Measuring the depth of water

  2. Measuring the transparency of water

  3. Measuring the turbidity of water

  4. Measuring the flow rate of water
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A Secchi disk is a simple instrument used to measure the transparency of water. It consists of a white disk that is lowered into the water until it disappears from view. The depth at which the disk disappears is a measure of the transparency of the water.

Multiple choice

Which instrument is used to measure the stage of a river?

  1. Staff gauge

  2. Water level recorder

  3. Flowmeter

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

A staff gauge is a simple instrument used to measure the stage of a river. It consists of a graduated scale that is attached to a post or structure in the river. The stage of the river is measured by reading the water level on the scale.

Multiple choice

Which instrument is used to measure the discharge of a river?

  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. The discharge of a river can be calculated by measuring the velocity of the water and the cross-sectional area of the river.

Multiple choice

Which of the following is NOT a common type of oceanographic instrument?

  1. CTD (Conductivity, Temperature, Depth) profiler

  2. ADCP (Acoustic Doppler Current Profiler)

  3. ROV (Remotely Operated Vehicle)

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

Spectrophotometers are not typically used as oceanographic instruments, as they are primarily used for analyzing the chemical composition of substances in laboratory settings.

Multiple choice

Which of the following is NOT a type of astronomical detector?

  1. CCD detector

  2. CMOS detector

  3. Photomultiplier tube

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

Radiometers are used to measure the intensity of radio waves, while CCD, CMOS, and photomultiplier tubes are used to detect light.

Multiple choice

Which of the following instruments is used to measure the altitude of celestial objects?

  1. Sundial

  2. Astrolabe

  3. Quadrant

  4. Armillary sphere
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

A quadrant is an instrument used to measure the altitude of celestial objects. It consists of a quarter-circle arc with a plumb line attached to the center.