Scientific Instruments & Their Uses MCQs 2026

Which instrument, similar to a Vernier caliper, is used for extremely precise measurements, often in millimeters/micrometers

1. A Screw gauge (Micrometer) ✓
2. B Barometer ✓
3. C Hygrometer ✓
4. D Fathometer ✓

Which instrument is used to record and display heart electrical activity, producing an ECG/EKG

1. A Electrocardiograph ✓
2. B Stethoscope ✓
3. C Sphygmomanometer ✓
4. D Endoscope ✓

Which instrument is used to measure atmospheric pressure

1. A Barometer ✓
2. B Thermometer ✓
3. C Hygrometer ✓
4. D Anemometer ✓

Which instrument is used to measure temperature

1. A Barometer ✓
2. B Thermometer ✓
3. C Hygrometer ✓
4. D Anemometer ✓

Which instrument is used to measure humidity in the air

1. A Barometer ✓
2. B Thermometer ✓
3. C Hygrometer ✓
4. D Anemometer ✓

Which instrument is used to measure wind speed

1. A Barometer ✓
2. B Hygrometer ✓
3. C Anemometer ✓
4. D Seismometer ✓

Which instrument is used to measure and record earthquakes

1. A Barometer ✓
2. B Seismometer ✓
3. C Anemometer ✓
4. D Hygrometer ✓

Which instrument is used to measure the intensity of light

1. A Photometer ✓
2. B Barometer ✓
3. C Anemometer ✓
4. D Hygrometer ✓

Which instrument is used to magnify small objects for detailed observation

1. A Telescope ✓
2. B Microscope ✓
3. C Periscope ✓
4. D Stethoscope ✓

Which instrument is used to observe distant celestial objects, such as stars and planets

1. A Microscope ✓
2. B Telescope ✓
3. C Periscope ✓
4. D Barometer ✓

Which instrument is used by doctors to listen to internal body sounds, such as the heartbeat

1. A Thermometer ✓
2. B Stethoscope ✓
3. C Barometer ✓
4. D Sphygmomanometer ✓

Which instrument is used to measure blood pressure

1. A Stethoscope ✓
2. B Sphygmomanometer ✓
3. C Thermometer ✓
4. D Barometer ✓

Which instrument is used to measure electric current

1. A Voltmeter ✓
2. B Ammeter ✓
3. C Ohmmeter ✓
4. D Wattmeter ✓

Which instrument is used to measure electrical voltage/potential difference

1. A Ammeter ✓
2. B Voltmeter ✓
3. C Ohmmeter ✓
4. D Galvanometer ✓

Which instrument is used to measure electrical resistance

1. A Ammeter ✓
2. B Voltmeter ✓
3. C Ohmmeter ✓
4. D Wattmeter ✓

Which instrument detects and measures small electric currents

1. A Voltmeter ✓
2. B Galvanometer ✓
3. C Ohmmeter ✓
4. D Wattmeter ✓

Which instrument is used to measure the density of liquids

1. A Hydrometer ✓
2. B Barometer ✓
3. C Anemometer ✓
4. D Manometer ✓

Which instrument is used to measure the depth of water bodies, such as oceans

1. A Altimeter ✓
2. B Fathometer (Echo sounder) ✓
3. C Anemometer ✓
4. D Barometer ✓

Which instrument is used to measure altitude above sea level

1. A Altimeter ✓
2. B Barometer only for pressure ✓
3. C Fathometer ✓
4. D Hydrometer ✓

Which instrument is used to measure the speed of a vehicle

1. A Odometer ✓
2. B Speedometer ✓
3. C Tachometer ✓
4. D Chronometer ✓

Which instrument is used to measure the distance traveled by a vehicle

1. A Odometer ✓
2. B Speedometer ✓
3. C Tachometer ✓
4. D Barometer ✓

Which instrument is used to measure the rotational speed of an engine, in revolutions per minute

1. A Odometer ✓
2. B Speedometer ✓
3. C Tachometer ✓
4. D Chronometer ✓

Which precise timekeeping instrument was historically crucial for maritime navigation

1. A Sundial ✓
2. B Chronometer ✓
3. C Hourglass ✓
4. D Metronome ✓

Which instrument is used to view objects around obstacles or from a concealed position, notably used in submarines

1. A Telescope ✓
2. B Periscope ✓
3. C Microscope ✓
4. D Endoscope ✓

Which medical instrument is used to internally examine body cavities or organs, often via a flexible tube with a camera

1. A Stethoscope ✓
2. B Endoscope ✓
3. C Sphygmomanometer ✓
4. D Otoscope ✓

Which instrument is used to measure and record body temperature using contact-free infrared technology

1. A Mercury thermometer ✓
2. B Infrared thermometer ✓
3. C Barometer ✓
4. D Hygrometer ✓

Which instrument is used to weigh objects, particularly using a balancing mechanism

1. A Barometer ✓
2. B Weighing balance/scale ✓
3. C Manometer ✓
4. D Anemometer ✓

Which instrument measures the pressure of gases, especially used in laboratory settings

1. A Barometer ✓
2. B Manometer ✓
3. C Hygrometer ✓
4. D Anemometer ✓

Which instrument is specifically designed to measure very small distances or thicknesses with high precision

1. A Vernier caliper ✓
2. B Barometer ✓
3. C Anemometer ✓
4. D Odometer ✓

Which instrument is used to detect and measure radioactivity

1. A Geiger counter ✓
2. B Barometer ✓
3. C Anemometer ✓
4. D Hygrometer ✓

Which instrument is used to examine the interior structures of the eye, particularly the retina

1. A Otoscope ✓
2. B Ophthalmoscope ✓
3. C Stethoscope ✓
4. D Sphygmomanometer ✓

Which instrument is used to test hearing ability, measuring the softest sounds a person can detect

1. A Stethoscope ✓
2. B Audiometer ✓
3. C Otoscope ✓
4. D Sphygmomanometer ✓

Which type of electron microscope passes electrons through an ultra-thin specimen to reveal internal structures

1. A Scanning electron microscope (SEM) ✓
2. B Transmission electron microscope (TEM) ✓
3. C Light microscope ✓
4. D Compound microscope ✓

Which type of electron microscope produces detailed 3D-like images of a specimen's surface

1. A Transmission electron microscope (TEM) ✓
2. B Scanning electron microscope (SEM) ✓
3. C Light microscope ✓
4. D Compound microscope ✓

Which instrument uses electron beams instead of light to achieve much higher magnification than optical microscopes

1. A Electron microscope ✓
2. B Light microscope ✓
3. C Telescope ✓
4. D Periscope ✓

Which laboratory dish, shallow and circular, is commonly used for culturing microorganisms

1. A Beaker ✓
2. B Petri dish ✓
3. C Test tube ✓
4. D Volumetric flask ✓

Which laboratory glassware is specifically designed to measure a precise, fixed volume of liquid

1. A Beaker ✓
2. B Volumetric flask ✓
3. C Test tube ✓
4. D Petri dish ✓

Which laboratory instrument is used for precise, controlled dispensing of liquid, often in titration experiments

1. A Beaker ✓
2. B Pipette ✓
3. C Burette ✓
4. D Test tube ✓

Which laboratory glassware is specifically designed for heating substances and mixing chemicals, typically with a wide mouth

1. A Beaker ✓
2. B Pipette ✓
3. C Burette ✓
4. D Volumetric flask ✓

Which instrument, essential in a laboratory, is used to accurately measure small volumes of liquid

1. A Pipette ✓
2. B Beaker ✓
3. C Flask ✓
4. D Test tube ✓

Which instrument is used in laboratories to separate mixtures based on differing densities, using rapid spinning

1. A Centrifuge ✓
2. B Spectrometer ✓
3. C Photometer ✓
4. D Refractometer ✓

Which instrument is used to measure the concentration of a solution based on light absorption

1. A Spectrophotometer ✓
2. B Barometer ✓
3. C Hygrometer ✓
4. D Anemometer ✓

Which instrument, commonly used in physics labs, measures small distances or angles using interference of light waves

1. A Interferometer ✓
2. B Spectrometer ✓
3. C Photometer ✓
4. D Refractometer ✓

Which instrument is used to detect and measure magnetic fields

1. A Galvanometer ✓
2. B Magnetometer ✓
3. C Voltmeter ✓
4. D Ohmmeter ✓

Which instrument is used to measure the refractive index of substances, often used to test liquid concentration

1. A Refractometer ✓
2. B Spectrometer ✓
3. C Photometer ✓
4. D Hydrometer ✓

Which instrument is used to measure the wavelength of light or analyze the spectrum of a light source

1. A Spectrometer ✓
2. B Photometer ✓
3. C Barometer ✓
4. D Anemometer ✓

Which instrument, using rotating mirrors and lenses, creates colorful, symmetrical patterns when viewed

1. A Periscope ✓
2. B Kaleidoscope ✓
3. C Telescope ✓
4. D Microscope ✓

Which optical instrument uses two or more lenses to magnify distant objects, commonly used for bird watching or stargazing

1. A Microscope ✓
2. B Binoculars ✓
3. C Periscope ✓
4. D Kaleidoscope ✓

Which instrument measures electrical activity in muscles, producing an EMG

1. A Electrocardiograph ✓
2. B Electroencephalograph ✓
3. C Electromyograph ✓
4. D Electroretinograph ✓

Which instrument measures the electrical activity of the brain, producing an EEG

1. A Electrocardiograph ✓
2. B Electroencephalograph ✓
3. C Electromyograph ✓
4. D Electroretinograph ✓

Which instrument is used to examine the larynx (voice box)

1. A Otoscope ✓
2. B Ophthalmoscope ✓
3. C Laryngoscope ✓
4. D Endoscope (general) ✓

Which instrument is used to examine the inside of the ear canal and eardrum

1. A Audiometer ✓
2. B Otoscope ✓
3. C Ophthalmoscope ✓
4. D Laryngoscope ✓

Which ancient timekeeping instrument uses the flow of sand through a narrow neck between two bulbs

1. A Sundial ✓
2. B Water clock ✓
3. C Hourglass ✓
4. D Candle clock ✓

Which ancient timekeeping instrument uses the position of a shadow cast by the sun

1. A Water clock ✓
2. B Sundial ✓
3. C Hourglass ✓
4. D Pendulum clock ✓

Which everyday timekeeping device relies on the consistent vibration of a small crystal when electrically stimulated

1. A Atomic clock ✓
2. B Quartz clock ✓
3. C Pendulum clock ✓
4. D Sundial ✓

Which type of clock uses the vibration of atoms to achieve extremely precise timekeeping, used as the international time standard

1. A Quartz clock ✓
2. B Atomic clock ✓
3. C Pendulum clock ✓
4. D Sundial ✓

Which instrument uses laser light pulses to measure distances, commonly used in modern mapping and autonomous vehicles

1. A Radar ✓
2. B Sonar ✓
3. C Lidar ✓
4. D Seismometer ✓

Which instrument uses sound waves to detect underwater objects, commonly used in submarines and ships

1. A Radar ✓
2. B Sonar ✓
3. C Lidar ✓
4. D Fathometer (a related, simpler application) ✓

Which instrument uses radio waves to detect the location, speed, and direction of objects, commonly used in weather and aviation

1. A Sonar ✓
2. B Radar ✓
3. C Lidar ✓
4. D Seismometer ✓

Which instrument is used to detect and analyze specific gases in the air, often for safety monitoring

1. A Gas chromatograph / Gas detector ✓
2. B Barometer ✓
3. C Hygrometer ✓
4. D Anemometer ✓

Which instrument is used to measure the flow rate of liquids or gases through a pipe or channel

1. A Flow meter ✓
2. B Barometer ✓
3. C Hygrometer ✓
4. D Anemometer ✓

Which drawing instrument is used to draw circles or arcs of a specific radius

1. A Protractor ✓
2. B Compass (drawing tool) ✓
3. C Plumb bob ✓
4. D Ruler ✓

Which drawing/measuring instrument is used to measure or draw angles, marked in degrees

1. A Compass (drawing tool) ✓
2. B Protractor ✓
3. C Plumb bob ✓
4. D Spirit level ✓

Which simple weighted instrument, hung from a string, is used to establish a true vertical line

1. A Spirit level ✓
2. B Plumb bob ✓
3. C Protractor ✓
4. D Compass (drawing tool) ✓

Which instrument, used in construction, ensures that a surface is perfectly horizontal

1. A Plumb bob ✓
2. B Spirit level ✓
3. C Theodolite ✓
4. D Protractor ✓

Which surveying instrument is used to measure horizontal and vertical angles precisely, often used in construction and land surveying

1. A Sextant ✓
2. B Compass ✓
3. C Astrolabe ✓
4. D Theodolite ✓

Which ancient astronomical instrument was used to measure the position of celestial bodies and tell time, predating the sextant

1. A Sextant ✓
2. B Compass ✓
3. C Astrolabe ✓
4. D Theodolite ✓

Which simple instrument uses a magnetized needle to indicate geographic direction

1. A Sextant ✓
2. B Compass ✓
3. C Astrolabe ✓
4. D Theodolite ✓

Which instrument, historically important for navigation, uses the angle between a celestial object and the horizon to determine position

1. A Sextant ✓
2. B Compass ✓
3. C Astrolabe ✓
4. D Theodolite ✓

Which simple instrument uses a stretched spring to measure force or weight, based on the spring's extension

1. A Analytical balance ✓
2. B Spring scale ✓
3. C Beam balance ✓
4. D Digital scale (different mechanism) ✓

Which instrument, used in vehicles and industrial settings, measures the amount of fuel or liquid remaining in a tank

1. A Fuel gauge ✓
2. B Flow meter ✓
3. C Pressure gauge ✓
4. D Speedometer ✓

Which instrument is used to accurately weigh very small masses, commonly used in laboratories and jewelry

1. A Analytical balance ✓
2. B Bathroom scale ✓
3. C Spring scale (less precise) ✓
4. D Platform scale ✓

Which simple indicator, often made from litmus paper, changes color to indicate whether a solution is acidic or basic

1. A Litmus test ✓
2. B pH meter (instrument, not indicator itself) ✓
3. C Spectrometer ✓
4. D Refractometer ✓

Which instrument is used to measure the acidity or alkalinity of a solution, expressed on a numerical scale

1. A pH meter ✓
2. B Barometer ✓
3. C Hygrometer ✓
4. D Anemometer ✓

Which instrument, commonly used by physicians, measures a patient's body temperature using a probe placed in the ear

1. A Oral thermometer ✓
2. B Tympanic (ear) thermometer ✓
3. C Infrared forehead thermometer ✓
4. D Rectal thermometer ✓

Which scale is used to categorize the intensity of hurricanes based on wind speed

1. A Richter scale ✓
2. B Beaufort scale ✓
3. C Fujita scale ✓
4. D Saffir-Simpson scale ✓

Which scale is used to categorize the intensity of tornadoes based on resulting damage

1. A Richter scale ✓
2. B Beaufort scale ✓
3. C Fujita scale (Enhanced Fujita Scale) ✓
4. D Saffir-Simpson scale ✓

Which scale is used to categorize wind speed and its observed effects, particularly at sea

1. A Richter scale ✓
2. B Beaufort scale ✓
3. C Fujita scale ✓
4. D Kelvin scale ✓

What scale is commonly used alongside seismograph data to express the magnitude of an earthquake

1. A Richter scale ✓
2. B Beaufort scale ✓
3. C Fahrenheit scale ✓
4. D Fujita scale ✓

Which instrument, used by geologists, measures the strength and characteristics of seismic waves during earthquakes

1. A Barometer ✓
2. B Seismograph ✓
3. C Anemometer ✓
4. D Hygrometer ✓