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.

Pressure and humidity instrumentsElectrical measuring devicesMedical physics toolsNavigational instruments

Physics Measuring Instruments Questions

Multiple choice

Which of the following is NOT a common type of environmental sensor?

  1. Temperature sensor

  2. Humidity sensor

  3. pH sensor

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

Motion sensors are not typically used for environmental monitoring, as they are designed to detect movement rather than environmental conditions.

Multiple choice

What is the purpose of using a hygrometer in an art storage facility?

  1. To measure temperature

  2. To measure humidity

  3. To measure light levels

  4. To measure air quality
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A hygrometer is used to measure humidity levels in an art storage facility. Humidity control is important for preventing damage to artworks caused by excessive moisture or dryness.

Multiple choice

What is the traditional Indian method for measuring elevations?

  1. Using a level

  2. Using a plumb bob

  3. Using a clinometer

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

In traditional Indian surveying, elevations were measured using a level, an instrument that establishes a horizontal reference plane for determining the height of objects or points.

Multiple choice

What is the purpose of using a hygrometer in an art museum or gallery?

  1. To measure the temperature.

  2. To measure the relative humidity.

  3. To measure the light levels.

  4. To measure the air quality.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The purpose of using a hygrometer in an art museum or gallery is to measure the relative humidity, as it is important to maintain a stable relative humidity level to prevent damage to the artworks.

Multiple choice

What is the primary instrument used to measure the altitude of celestial bodies in celestial navigation?

  1. Sextant

  2. Astrolabe

  3. Compass

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

The sextant is the primary instrument used to measure the altitude of celestial bodies in celestial navigation.

Multiple choice

Which instrument is commonly used to measure the speed and direction of ocean currents?

  1. Current meter

  2. ADCP (Acoustic Doppler Current Profiler)

  3. Drifting buoy

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

An ADCP uses acoustic signals to measure the velocity of water currents at different depths, providing detailed information about ocean circulation patterns.

Multiple choice

What is the purpose of using a rosette sampler in oceanographic measurements?

  1. To collect water samples at various depths

  2. To measure the temperature of the ocean

  3. To determine the salinity of seawater

  4. To measure the concentration of dissolved oxygen
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A rosette sampler is a device equipped with multiple water sampling bottles that can be opened and closed at specific depths, allowing researchers to collect water samples from different depths simultaneously.

Multiple choice

What type of instrument is used to measure the concentration of dissolved oxygen in seawater?

  1. Oxygen sensor

  2. Dissolved oxygen meter

  3. Oxygen probe

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

Oxygen sensors, dissolved oxygen meters, and oxygen probes are all instruments used to measure the concentration of dissolved oxygen in seawater, providing insights into the health and productivity of marine ecosystems.

Multiple choice

What is the primary function of a tide gauge in oceanographic measurements?

  1. To measure the height of tides

  2. To determine the speed of ocean currents

  3. To measure the temperature of the ocean

  4. To collect water samples
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A tide gauge is an instrument used to measure the height of tides, providing valuable information about tidal patterns, sea level variations, and coastal processes.

Multiple choice

Which instrument is commonly used to measure the concentration of nutrients in seawater?

  1. Nutrient analyzer

  2. Spectrophotometer

  3. Fluorometer

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

Nutrient analyzers, spectrophotometers, and fluorometers are all instruments used to measure the concentration of nutrients, such as nitrates, phosphates, and silicates, in seawater, providing insights into the productivity and biogeochemical cycles of marine ecosystems.

Multiple choice

Which instrument is commonly used to measure the concentration of chlorophyll in seawater?

  1. Fluorometer

  2. Spectrophotometer

  3. Chlorophyll meter

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

Fluorometers, spectrophotometers, and chlorophyll meters are all instruments used to measure the concentration of chlorophyll, a pigment found in phytoplankton, providing insights into the abundance and productivity of marine plant life.

Multiple choice

Which instrument is commonly used to measure the concentration of heavy metals in seawater?

  1. Atomic absorption spectrometer

  2. Inductively coupled plasma mass spectrometer (ICP-MS)

  3. X-ray fluorescence spectrometer

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

Atomic absorption spectrometers, inductively coupled plasma mass spectrometers, and X-ray fluorescence spectrometers are all instruments used to measure the concentration of heavy metals in seawater, providing insights into the sources, distribution, and potential toxicity of these contaminants.

Multiple choice

Which instrument is commonly used to measure the concentration of carbon dioxide in seawater?

  1. Carbon dioxide sensor

  2. Total alkalinity analyzer

  3. pH meter

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

Carbon dioxide sensors, total alkalinity analyzers, and pH meters are all instruments used to measure the concentration of carbon dioxide in seawater, providing insights into the ocean's role in the global carbon cycle and ocean acidification.

Multiple choice

Which instrument is commonly used to measure the concentration of suspended particulate matter in seawater?

  1. Turbidity meter

  2. Nephelometer

  3. Transmissometer

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

Turbidity meters, nephelometers, and transmissometers are all instruments used to measure the concentration of suspended particulate matter in seawater, providing insights into water clarity, sediment transport, and the dynamics of marine ecosystems.

Multiple choice

What is the term for the underwater breathing apparatus used in scuba diving?

  1. Snorkel

  2. Flippers

  3. Buoyancy Compensator Device (BCD)

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

In scuba diving, the scuba tank is the underwater breathing apparatus that provides divers with a supply of compressed air for breathing.