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

Which of the following is NOT a common type of water quality monitoring equipment?

  1. pH meter

  2. Turbidimeter

  3. Dissolved oxygen meter

  4. Conductivity meter

  5. Flow meter
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Flow meters are not typically used in water quality monitoring, as they are primarily used to measure the flow rate of water.

Multiple choice

Which of the following is a type of sensor used to measure volatile organic compounds (VOCs) in the air?

  1. Photoionization detector (PID)

  2. Flame ionization detector (FID)

  3. Gas chromatography-mass spectrometry (GC-MS)

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

PIDs measure VOCs by ionizing them with ultraviolet light and detecting the resulting ions.

Multiple choice

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

  1. The quadrant

  2. The sextant

  3. The astrolabe

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

The quadrant is an astronomical instrument that is used to measure the altitude of celestial bodies above the horizon. It consists of a quarter-circle arc with a plumb line attached to its center.

Multiple choice

Which of the following is a type of fog-collecting net used to capture water droplets in deserts?

  1. Windsock

  2. Barbed wire

  3. Fog fence

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

Fog fences are large nets used to capture water droplets from fog in deserts. They are typically made of plastic or nylon mesh and can collect significant amounts of water.

Multiple choice

Which of the following is an ancient mathematical instrument used for measuring angles?

  1. Astrolabe

  2. Compass

  3. Protractor

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

The astrolabe is an ancient instrument used to measure the altitude of celestial bodies, such as the sun and stars, above the horizon. It was used in astronomy, navigation, and surveying.

Multiple choice

Which mathematical instrument is used for drawing circles and arcs?

  1. Compass

  2. Protractor

  3. Ruler

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

A compass is a drawing instrument used for drawing circles and arcs. It consists of two legs, one with a sharp point and the other with a pencil or pen.

Multiple choice

Which mathematical instrument is used for measuring and displaying time?

  1. Clock

  2. Compass

  3. Protractor

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

A clock is a device used for measuring and displaying time.

Multiple choice

Which mathematical instrument is used for measuring and displaying physical quantities?

  1. Meter

  2. Micrometer

  3. Thermometer

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

A meter is a device used for measuring and displaying physical quantities, such as length, mass, and temperature.

Multiple choice

Which instrument is primarily used to measure ocean currents?

  1. Current meter

  2. Salinometer

  3. Thermistor

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

Current meters are specialized instruments designed to measure the speed and direction of ocean currents.

Multiple choice

Which instrument is used to measure the depth of the ocean?

  1. Echosounder

  2. Current meter

  3. Salinometer

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

Echosounders emit sound waves and measure the time it takes for the waves to bounce off the ocean floor and return, providing information about the depth.

Multiple choice

What is the purpose of a rosette sampler in oceanography?

  1. Measuring ocean currents

  2. Collecting water samples at various depths

  3. Measuring dissolved oxygen

  4. Measuring water clarity
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Rosette samplers are used to collect water samples at specific depths, allowing scientists to analyze water properties and constituents.

Multiple choice

Which instrument is commonly used to measure water clarity or turbidity in the ocean?

  1. Secchi disk

  2. Current meter

  3. Salinometer

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

Secchi disks are simple but effective tools used to measure water clarity by lowering them into the water and recording the depth at which they disappear from sight.

Multiple choice

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

  1. Dissolved oxygen meter

  2. Current meter

  3. Salinometer

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

Dissolved oxygen meters measure the amount of dissolved oxygen in seawater, which is crucial for marine life and ecosystem health.

Multiple choice

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

  1. Current meter

  2. Salinometer

  3. Thermistor

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

Current meters measure the speed and direction of ocean currents, providing valuable information for understanding ocean circulation patterns.

Multiple choice

Which instrument is commonly used to measure the temperature of seawater?

  1. Thermistor

  2. Current meter

  3. Salinometer

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

Thermistors are temperature sensors used to measure the temperature of seawater, providing insights into ocean thermal structure and variability.