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 general knowledge

The intensity of an earthquake is measured with a

  1. Barometer

  2. Hydrometer

  3. Polygraph

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

A seismograph is the scientific instrument specifically designed to detect and record seismic waves, making it the correct tool for measuring earthquake intensity. Barometers measure atmospheric pressure, hydrometers measure liquid density, and polygraphs are used for lie detection.

Multiple choice general knowledge

Which among the following instrument is used for measuring wind speed ?

  1. Anemometer

  2. Hygrometer

  3. Spectrometer

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

An anemometer is the scientific instrument specifically designed to measure wind speed and wind pressure. It typically consists of cups or propellers that rotate with the wind, with the rotation speed directly proportional to wind velocity. Hygrometers measure humidity, spectrometers analyze light spectra, and hydrometers measure liquid density.

Multiple choice softskills leadership

Time is to clock as temperature is to

  1. thermometer

  2. fever

  3. gage

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

A clock is the instrument used to measure time, just as a thermometer is the instrument used to measure temperature. This analogy pairs each phenomenon with the device that quantifies it.

Multiple choice technology

Hygrometers are used to measure

  1. Flow

  2. Density

  3. Relative humidity

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

Hygrometers are instruments specifically designed to measure the amount of water vapor in the air, which is expressed as relative humidity - the ratio of actual moisture content to maximum possible moisture content at that temperature.

Multiple choice technology

Feeler gauges are used for measuring the

  1. Thickness of plates

  2. Pitch of screw threads

  3. Clearance between mating part

  4. Radius of curvature
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Feeler gauges are precision measurement tools consisting of thin metal strips of known thickness, used to measure small gaps or clearances between mating surfaces like bearings, pistons, and valves.

Multiple choice technology

Bourdon tube is a

  1. Flowmeter

  2. Level meter

  3. Pressure gauge

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

A Bourdon tube is a pressure-sensing element used in pressure gauges. It consists of a curved or C-shaped tube that straightens when pressurized, and this mechanical movement is converted into a pressure reading. Bourdon tubes are the most common pressure sensing mechanism in analog pressure gauges.

Multiple choice technology usability

Sphygmomanometer is used for

  1. Voltage Spike measurement

  2. Blood pressure measurement

  3. Retinal thickness measurement

  4. none of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

A sphygmomanometer is a medical device specifically designed to measure blood pressure. It typically consists of an inflatable cuff and a measuring unit to determine systolic and diastolic pressure readings.

Multiple choice

What is the use of a kink in clinical thermometer?

  1. To increase the beauty of the thermometer

  2. It prevents mercury level from falling on its own.

  3. It allows the mercury to rise up faster.

  4. The kink allows to hold more mercury.

  5. Kink gives it a better shape.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The kink prevents mercury level from falling on its own so that correct body temperature is recorded.

Multiple choice

Which instrument is used to measure blood pressure?

  1. Stethoscope

  2. Echocardiogram

  3. Sphygmomanometer

  4. Pacemaker

  5. Thermometer
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The sphygmomanometer is designed to monitor the blood pressure by measuring the force of the blood in the heart where the pressure is the greatest. This occurs during the contraction of the ventricles when blood is pumped from the heart to the rest of the body (systolic pressure). The minimal force is also measured during the relaxation of the heart.

Multiple choice

Electrical current is measured by

  1. voltameter

  2. anemometer

  3. wattmeter

  4. ammeter

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

An ammeter is the instrument used to measure electric current in a circuit. It works by connecting in series with the circuit and measuring the flow of electrons. The other options are different instruments: voltmeter measures voltage (potential difference), anemometer measures wind speed, and wattmeter measures electric power.

Multiple choice

Dialyzer is a /an ______.

  1. metre used for controlling volume of sound

  2. apparatus used for recharging batteries

  3. special clock which indicates the day and date

  4. apparatus used in patients with defective renal functions
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A dialyzer is a medical device that performs the function of kidneys in patients with renal failure by removing waste products and excess fluids from blood through dialysis. It's not related to sound control, battery charging, or timekeeping.