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

What instrument is used to measure the amount of methane in the atmosphere?

  1. Methane monitor

  2. Gas chromatograph

  3. Lidar

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

A methane monitor, gas chromatograph, and lidar are all used to measure the amount of methane in the atmosphere.

Multiple choice

Where are the two LIGO detectors located?

  1. Hanford, Washington, and Livingston, Louisiana.

  2. Pasadena, California, and Cambridge, Massachusetts.

  3. Greenwich, England, and Perth, Australia.

  4. Tokyo, Japan, and Beijing, China.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The two LIGO detectors are situated in Hanford, Washington, and Livingston, Louisiana, to maximize the chances of detecting gravitational waves from different directions.

Multiple choice

Which instrument is commonly used to measure the refractive index of liquids?

  1. Refractometer

  2. Spectrophotometer

  3. Polarimeter

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

A refractometer is a device specifically designed to measure the refractive index of liquids. It works by measuring the critical angle of a liquid sample and using this information to calculate the refractive index.

Multiple choice

What is the Imhoff cone used for in settleable solids measurement?

  1. Measuring the volume of settled solids

  2. Collecting water samples for analysis

  3. Mixing water samples with chemicals

  4. Calibrating laboratory equipment
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Imhoff cone is a graduated container used to measure the volume of settled solids after a specific settling time.

Multiple choice

What is the most important piece of scuba diving equipment?

  1. Buoyancy compensator device (BCD)

  2. Scuba tank

  3. Regulator

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

The most important piece of scuba diving equipment is the buoyancy compensator device (BCD), which helps to control the diver's buoyancy.

Multiple choice

Which flow visualization method utilizes a heated wire to measure flow velocity?

  1. Hot-Wire Anemometry

  2. Laser Doppler Velocimetry (LDV)

  3. Particle Image Velocimetry (PIV)

  4. Flow Visualization by Luminescent Paint
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hot-Wire Anemometry involves placing a heated wire in the flow and measuring the heat transfer from the wire to the fluid to determine flow velocity.

Multiple choice

What is the primary instrument used to measure gravity?

  1. Gravimeter

  2. Seismometer

  3. Magnetometer

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

A gravimeter is the primary instrument used to measure gravity, detecting variations in the Earth's gravitational field.

Multiple choice

What is the name of the instrument used to measure wind speed?

  1. Anemometer

  2. Barometer

  3. Thermometer

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

An anemometer is a device used to measure wind speed. It typically consists of rotating cups or vanes that are moved by the wind, and the speed of rotation is converted into a wind speed measurement.

Multiple choice

What is the name of the instrument used to measure air pressure?

  1. Barometer

  2. Anemometer

  3. Thermometer

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

A barometer is a device used to measure air pressure. It typically consists of a column of liquid, such as mercury or water, and the height of the liquid column is influenced by the air pressure.

Multiple choice

The Beaufort Wind Scale is used to measure:

  1. Wind speed

  2. Wind direction

  3. Air temperature

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

The Beaufort Wind Scale is used to measure wind speed based on observed sea conditions and land-based effects.

Multiple choice

Which instrument is commonly used for measuring the vertical distribution of temperature and humidity in the atmosphere?

  1. Radiosonde

  2. Lidar

  3. Radar

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

Radiosonde is a balloon-borne instrument package that measures atmospheric temperature, humidity, pressure, and wind speed as it ascends through the atmosphere.

Multiple choice

What is the principle behind the operation of a nephelometer?

  1. It measures the scattering of light by particles in the air

  2. It measures the absorption of light by particles in the air

  3. It measures the size of particles in the air

  4. It measures the mass of particles in the air
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A nephelometer is an instrument that measures the amount of light scattered by particles in the air. The amount of scattering is proportional to the concentration of particles in the air.

Multiple choice

Which of the following is a common type of constraint used in physics simulations?

  1. Distance constraint

  2. Angle constraint

  3. Hinge constraint

  4. Slider constraint
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Hinge constraint is a common type of constraint that allows objects to rotate around a fixed axis while preventing them from translating.

Multiple choice

Which device is used to measure the strength of an electric current?

  1. Ammeter

  2. Voltmeter

  3. Ohmmeter

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

An ammeter is a device used to measure the strength of an electric current. It is connected in series with the circuit to measure the current flowing through it.

Multiple choice

What is the primary instrument used to measure atmospheric pressure?

  1. Barometer

  2. Thermometer

  3. Anemometer

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

A barometer is a device used to measure atmospheric pressure.