Scientific Instruments & Their Uses MCQs 2026

80 questions with detailed answers · 0 from past papers · 8 quiz batches available

📚 Everyday Science✓ Free · No Login Needed

Read each question, think about the answer, then click Show Answer to reveal the correct option and explanation. Load 10 at a time so it stays manageable — perfect for one-topic study sessions on the bus or during a break.

Page 1 of 1Questions 1–10 of 80

Q1medium
Which instrument, similar to a Vernier caliper, is used for extremely precise measurements, often in millimeters/micrometers
1. AScrew gauge (Micrometer)
2. BBarometer
3. CHygrometer
4. DFathometer
💡 Explanation:
A screw gauge (micrometer) allows extremely precise measurement of small dimensions, often to fractions of a millimeter.
Q2medium
Which instrument is used to record and display heart electrical activity, producing an ECG/EKG
1. AElectrocardiograph
2. BStethoscope
3. CSphygmomanometer
4. DEndoscope
💡 Explanation:
An electrocardiograph records the heart's electrical activity, producing an electrocardiogram (ECG/EKG).
Q3easy
Which instrument is used to measure atmospheric pressure
1. ABarometer
2. BThermometer
3. CHygrometer
4. DAnemometer
💡 Explanation:
A barometer is used to measure atmospheric pressure.
Q4easy
Which instrument is used to measure temperature
1. ABarometer
2. BThermometer
3. CHygrometer
4. DAnemometer
💡 Explanation:
A thermometer is used to measure temperature.
Q5medium
Which instrument is used to measure humidity in the air
1. ABarometer
2. BThermometer
3. CHygrometer
4. DAnemometer
💡 Explanation:
A hygrometer is used to measure atmospheric humidity.
Q6medium
Which instrument is used to measure wind speed
1. ABarometer
2. BHygrometer
3. CAnemometer
4. DSeismometer
💡 Explanation:
An anemometer is used to measure wind speed.
Q7medium
Which instrument is used to measure and record earthquakes
1. ABarometer
2. BSeismometer
3. CAnemometer
4. DHygrometer
💡 Explanation:
A seismometer (or seismograph) is used to detect and record ground motion during earthquakes.
Q8medium
Which instrument is used to measure the intensity of light
1. APhotometer
2. BBarometer
3. CAnemometer
4. DHygrometer
💡 Explanation:
A photometer measures the intensity of light.
Q9easy
Which instrument is used to magnify small objects for detailed observation
1. ATelescope
2. BMicroscope
3. CPeriscope
4. DStethoscope
💡 Explanation:
A microscope is used to magnify small objects, such as cells, for detailed observation.
Q10easy
Which instrument is used to observe distant celestial objects, such as stars and planets
1. AMicroscope
2. BTelescope
3. CPeriscope
4. DBarometer
💡 Explanation:
A telescope is used to observe distant objects, particularly celestial bodies.
Q11easy
Which instrument is used by doctors to listen to internal body sounds, such as the heartbeat
1. AThermometer
2. BStethoscope
3. CBarometer
4. DSphygmomanometer
💡 Explanation:
A stethoscope is used to listen to internal body sounds, particularly heart and lung sounds.
Q12medium
Which instrument is used to measure blood pressure
1. AStethoscope
2. BSphygmomanometer
3. CThermometer
4. DBarometer
💡 Explanation:
A sphygmomanometer is used to measure blood pressure.
Q13medium
Which instrument is used to measure electric current
1. AVoltmeter
2. BAmmeter
3. COhmmeter
4. DWattmeter
💡 Explanation:
An ammeter is used to measure electric current, typically in amperes.
Q14medium
Which instrument is used to measure electrical voltage/potential difference
1. AAmmeter
2. BVoltmeter
3. COhmmeter
4. DGalvanometer
💡 Explanation:
A voltmeter is used to measure electrical potential difference (voltage).
Q15medium
Which instrument is used to measure electrical resistance
1. AAmmeter
2. BVoltmeter
3. COhmmeter
4. DWattmeter
💡 Explanation:
An ohmmeter is used to measure electrical resistance in ohms.
Q16medium
Which instrument detects and measures small electric currents
1. AVoltmeter
2. BGalvanometer
3. COhmmeter
4. DWattmeter
💡 Explanation:
A galvanometer is a sensitive instrument used to detect and measure small electric currents.
Q17medium
Which instrument is used to measure the density of liquids
1. AHydrometer
2. BBarometer
3. CAnemometer
4. DManometer
💡 Explanation:
A hydrometer measures the density (specific gravity) of liquids.
Q18hard
Which instrument is used to measure the depth of water bodies, such as oceans
1. AAltimeter
2. BFathometer (Echo sounder)
3. CAnemometer
4. DBarometer
💡 Explanation:
A fathometer (or echo sounder) uses sound waves to measure the depth of water bodies.
Q19medium
Which instrument is used to measure altitude above sea level
1. AAltimeter
2. BBarometer only for pressure
3. CFathometer
4. DHydrometer
💡 Explanation:
An altimeter measures altitude, often using changes in atmospheric pressure.
Q20easy
Which instrument is used to measure the speed of a vehicle
1. AOdometer
2. BSpeedometer
3. CTachometer
4. DChronometer
💡 Explanation:
A speedometer measures the speed of a vehicle.
Q21easy
Which instrument is used to measure the distance traveled by a vehicle
1. AOdometer
2. BSpeedometer
3. CTachometer
4. DBarometer
💡 Explanation:
An odometer measures the total distance traveled by a vehicle.
Q22medium
Which instrument is used to measure the rotational speed of an engine, in revolutions per minute
1. AOdometer
2. BSpeedometer
3. CTachometer
4. DChronometer
💡 Explanation:
A tachometer measures rotational speed, commonly used to display engine RPM.
Q23medium
Which precise timekeeping instrument was historically crucial for maritime navigation
1. ASundial
2. BChronometer
3. CHourglass
4. DMetronome
💡 Explanation:
A marine chronometer, a highly precise timekeeping device, was crucial for determining longitude during sea navigation.
Q24medium
Which instrument is used to view objects around obstacles or from a concealed position, notably used in submarines
1. ATelescope
2. BPeriscope
3. CMicroscope
4. DEndoscope
💡 Explanation:
A periscope allows viewing around obstacles or from a concealed position, notably used in submarines.
Q25medium
Which medical instrument is used to internally examine body cavities or organs, often via a flexible tube with a camera
1. AStethoscope
2. BEndoscope
3. CSphygmomanometer
4. DOtoscope
💡 Explanation:
An endoscope is used to internally examine body cavities and organs, often equipped with a camera.
Q26medium
Which instrument is used to measure and record body temperature using contact-free infrared technology
1. AMercury thermometer
2. BInfrared thermometer
3. CBarometer
4. DHygrometer
💡 Explanation:
Infrared thermometers measure temperature without direct contact, using infrared radiation.
Q27easy
Which instrument is used to weigh objects, particularly using a balancing mechanism
1. ABarometer
2. BWeighing balance/scale
3. CManometer
4. DAnemometer
💡 Explanation:
A weighing balance or scale is used to measure the mass or weight of objects.
Q28medium
Which instrument measures the pressure of gases, especially used in laboratory settings
1. ABarometer
2. BManometer
3. CHygrometer
4. DAnemometer
💡 Explanation:
A manometer measures gas pressure, commonly used in laboratory and industrial settings.
Q29medium
Which instrument is specifically designed to measure very small distances or thicknesses with high precision
1. AVernier caliper
2. BBarometer
3. CAnemometer
4. DOdometer
💡 Explanation:
A Vernier caliper is used for precise measurement of small distances, thickness, or diameters.
Q30medium
Which instrument is used to detect and measure radioactivity
1. AGeiger counter
2. BBarometer
3. CAnemometer
4. DHygrometer
💡 Explanation:
A Geiger counter is used to detect and measure ionizing radiation, particularly radioactivity.
Q31medium
Which instrument is used to examine the interior structures of the eye, particularly the retina
1. AOtoscope
2. BOphthalmoscope
3. CStethoscope
4. DSphygmomanometer
💡 Explanation:
An ophthalmoscope is used to examine the interior of the eye, including the retina and optic nerve.
Q32medium
Which instrument is used to test hearing ability, measuring the softest sounds a person can detect
1. AStethoscope
2. BAudiometer
3. COtoscope
4. DSphygmomanometer
💡 Explanation:
An audiometer is used to test hearing sensitivity, determining the softest audible sounds at various frequencies.
Q33hard
Which type of electron microscope passes electrons through an ultra-thin specimen to reveal internal structures
1. AScanning electron microscope (SEM)
2. BTransmission electron microscope (TEM)
3. CLight microscope
4. DCompound microscope
💡 Explanation:
A transmission electron microscope (TEM) passes electrons through thin specimens to reveal detailed internal structures.
Q34hard
Which type of electron microscope produces detailed 3D-like images of a specimen's surface
1. ATransmission electron microscope (TEM)
2. BScanning electron microscope (SEM)
3. CLight microscope
4. DCompound microscope
💡 Explanation:
A scanning electron microscope (SEM) scans a specimen's surface, producing detailed, three-dimensional-like images.
Q35medium
Which instrument uses electron beams instead of light to achieve much higher magnification than optical microscopes
1. AElectron microscope
2. BLight microscope
3. CTelescope
4. DPeriscope
💡 Explanation:
An electron microscope uses electron beams rather than light, achieving significantly higher magnification and resolution than optical microscopes.
Q36easy
Which laboratory dish, shallow and circular, is commonly used for culturing microorganisms
1. ABeaker
2. BPetri dish
3. CTest tube
4. DVolumetric flask
💡 Explanation:
A Petri dish is a shallow circular dish commonly used for culturing bacteria and other microorganisms.
Q37medium
Which laboratory glassware is specifically designed to measure a precise, fixed volume of liquid
1. ABeaker
2. BVolumetric flask
3. CTest tube
4. DPetri dish
💡 Explanation:
A volumetric flask is designed to hold and measure one precise, fixed volume of liquid accurately.
Q38medium
Which laboratory instrument is used for precise, controlled dispensing of liquid, often in titration experiments
1. ABeaker
2. BPipette
3. CBurette
4. DTest tube
💡 Explanation:
A burette is used for precise, controlled dispensing of liquid volumes, especially in titration experiments.
Q39easy
Which laboratory glassware is specifically designed for heating substances and mixing chemicals, typically with a wide mouth
1. ABeaker
2. BPipette
3. CBurette
4. DVolumetric flask
💡 Explanation:
A beaker is common laboratory glassware used for mixing, heating, and holding liquids, with a wide mouth for easy access.
Q40easy
Which instrument, essential in a laboratory, is used to accurately measure small volumes of liquid
1. APipette
2. BBeaker
3. CFlask
4. DTest tube
💡 Explanation:
A pipette is used to accurately measure and transfer small, precise volumes of liquid in laboratory settings.
Q41medium
Which instrument is used in laboratories to separate mixtures based on differing densities, using rapid spinning
1. ACentrifuge
2. BSpectrometer
3. CPhotometer
4. DRefractometer
💡 Explanation:
A centrifuge separates components of a mixture based on density differences through rapid spinning.
Q42hard
Which instrument is used to measure the concentration of a solution based on light absorption
1. ASpectrophotometer
2. BBarometer
3. CHygrometer
4. DAnemometer
💡 Explanation:
A spectrophotometer measures light absorption by a solution to determine its concentration.
Q43hard
Which instrument, commonly used in physics labs, measures small distances or angles using interference of light waves
1. AInterferometer
2. BSpectrometer
3. CPhotometer
4. DRefractometer
💡 Explanation:
An interferometer uses light wave interference patterns to measure extremely small distances or detect minute changes.
Q44medium
Which instrument is used to detect and measure magnetic fields
1. AGalvanometer
2. BMagnetometer
3. CVoltmeter
4. DOhmmeter
💡 Explanation:
A magnetometer is used to detect and measure the strength and direction of magnetic fields.
Q45hard
Which instrument is used to measure the refractive index of substances, often used to test liquid concentration
1. ARefractometer
2. BSpectrometer
3. CPhotometer
4. DHydrometer
💡 Explanation:
A refractometer measures the refractive index of substances, commonly used to determine liquid concentrations like sugar content.
Q46hard
Which instrument is used to measure the wavelength of light or analyze the spectrum of a light source
1. ASpectrometer
2. BPhotometer
3. CBarometer
4. DAnemometer
💡 Explanation:
A spectrometer measures the wavelengths of light, useful for analyzing the composition of light sources.
Q47medium
Which instrument, using rotating mirrors and lenses, creates colorful, symmetrical patterns when viewed
1. APeriscope
2. BKaleidoscope
3. CTelescope
4. DMicroscope
💡 Explanation:
A kaleidoscope uses mirrors and colored objects to create shifting symmetrical patterns.
Q48easy
Which optical instrument uses two or more lenses to magnify distant objects, commonly used for bird watching or stargazing
1. AMicroscope
2. BBinoculars
3. CPeriscope
4. DKaleidoscope
💡 Explanation:
Binoculars use paired lenses to magnify distant objects, commonly used for activities like bird watching or astronomy.
Q49hard
Which instrument measures electrical activity in muscles, producing an EMG
1. AElectrocardiograph
2. BElectroencephalograph
3. CElectromyograph
4. DElectroretinograph
💡 Explanation:
An electromyograph (EMG) measures the electrical activity produced by skeletal muscles.
Q50medium
Which instrument measures the electrical activity of the brain, producing an EEG
1. AElectrocardiograph
2. BElectroencephalograph
3. CElectromyograph
4. DElectroretinograph
💡 Explanation:
An electroencephalograph (EEG) records the electrical activity of the brain.
Q51medium
Which instrument is used to examine the larynx (voice box)
1. AOtoscope
2. BOphthalmoscope
3. CLaryngoscope
4. DEndoscope (general)
💡 Explanation:
A laryngoscope is specifically used to examine the larynx, often used during intubation procedures as well.
Q52medium
Which instrument is used to examine the inside of the ear canal and eardrum
1. AAudiometer
2. BOtoscope
3. COphthalmoscope
4. DLaryngoscope
💡 Explanation:
An otoscope is used by doctors to examine the ear canal and eardrum.
Q53easy
Which ancient timekeeping instrument uses the flow of sand through a narrow neck between two bulbs
1. ASundial
2. BWater clock
3. CHourglass
4. DCandle clock
💡 Explanation:
An hourglass measures time through the controlled flow of sand from an upper bulb to a lower one.
Q54easy
Which ancient timekeeping instrument uses the position of a shadow cast by the sun
1. AWater clock
2. BSundial
3. CHourglass
4. DPendulum clock
💡 Explanation:
A sundial uses the position of a shadow, cast by the sun, to indicate the time of day.
Q55medium
Which everyday timekeeping device relies on the consistent vibration of a small crystal when electrically stimulated
1. AAtomic clock
2. BQuartz clock
3. CPendulum clock
4. DSundial
💡 Explanation:
Quartz clocks and watches rely on the precise, consistent vibration of a quartz crystal when subjected to electrical current.
Q56medium
Which type of clock uses the vibration of atoms to achieve extremely precise timekeeping, used as the international time standard
1. AQuartz clock
2. BAtomic clock
3. CPendulum clock
4. DSundial
💡 Explanation:
Atomic clocks use the highly precise vibrational frequency of atoms (commonly cesium) to maintain extremely accurate time.
Q57medium
Which instrument uses laser light pulses to measure distances, commonly used in modern mapping and autonomous vehicles
1. ARadar
2. BSonar
3. CLidar
4. DSeismometer
💡 Explanation:
Lidar (Light Detection and Ranging) uses laser pulses to precisely measure distances, used in mapping and autonomous vehicle technology.
Q58medium
Which instrument uses sound waves to detect underwater objects, commonly used in submarines and ships
1. ARadar
2. BSonar
3. CLidar
4. DFathometer (a related, simpler application)
💡 Explanation:
Sonar (Sound Navigation and Ranging) uses sound waves to detect and locate underwater objects.
Q59medium
Which instrument uses radio waves to detect the location, speed, and direction of objects, commonly used in weather and aviation
1. ASonar
2. BRadar
3. CLidar
4. DSeismometer
💡 Explanation:
Radar (Radio Detection and Ranging) uses radio waves to detect objects, widely used in weather forecasting and aviation.
Q60hard
Which instrument is used to detect and analyze specific gases in the air, often for safety monitoring
1. AGas chromatograph / Gas detector
2. BBarometer
3. CHygrometer
4. DAnemometer
💡 Explanation:
Gas chromatographs and specialized gas detectors are used to identify and measure specific gases, often for safety monitoring.
Q61medium
Which instrument is used to measure the flow rate of liquids or gases through a pipe or channel
1. AFlow meter
2. BBarometer
3. CHygrometer
4. DAnemometer
💡 Explanation:
A flow meter measures the rate at which liquid or gas flows through a pipe or channel.
Q62easy
Which drawing instrument is used to draw circles or arcs of a specific radius
1. AProtractor
2. BCompass (drawing tool)
3. CPlumb bob
4. DRuler
💡 Explanation:
A drawing compass, distinct from a magnetic compass, is used to draw precise circles or arcs.
Q63easy
Which drawing/measuring instrument is used to measure or draw angles, marked in degrees
1. ACompass (drawing tool)
2. BProtractor
3. CPlumb bob
4. DSpirit level
💡 Explanation:
A protractor is a flat, typically semicircular tool used to measure or draw angles in degrees.
Q64medium
Which simple weighted instrument, hung from a string, is used to establish a true vertical line
1. ASpirit level
2. BPlumb bob
3. CProtractor
4. DCompass (drawing tool)
💡 Explanation:
A plumb bob, a weight suspended from a string, is used to establish a precise vertical reference line.
Q65medium
Which instrument, used in construction, ensures that a surface is perfectly horizontal
1. APlumb bob
2. BSpirit level
3. CTheodolite
4. DProtractor
💡 Explanation:
A spirit level uses an air bubble in a liquid-filled tube to indicate whether a surface is perfectly horizontal.
Q66hard
Which surveying instrument is used to measure horizontal and vertical angles precisely, often used in construction and land surveying
1. ASextant
2. BCompass
3. CAstrolabe
4. DTheodolite
💡 Explanation:
A theodolite is a precision surveying instrument used to measure horizontal and vertical angles.
Q67hard
Which ancient astronomical instrument was used to measure the position of celestial bodies and tell time, predating the sextant
1. ASextant
2. BCompass
3. CAstrolabe
4. DTheodolite
💡 Explanation:
The astrolabe, an ancient instrument, was used to measure celestial positions and served various astronomical and timekeeping purposes.
Q68easy
Which simple instrument uses a magnetized needle to indicate geographic direction
1. ASextant
2. BCompass
3. CAstrolabe
4. DTheodolite
💡 Explanation:
A compass uses a magnetized needle that aligns with Earth's magnetic field to indicate direction.
Q69medium
Which instrument, historically important for navigation, uses the angle between a celestial object and the horizon to determine position
1. ASextant
2. BCompass
3. CAstrolabe
4. DTheodolite
💡 Explanation:
A sextant measures the angle between a celestial body and the horizon, historically crucial for maritime navigation.
Q70medium
Which simple instrument uses a stretched spring to measure force or weight, based on the spring's extension
1. AAnalytical balance
2. BSpring scale
3. CBeam balance
4. DDigital scale (different mechanism)
💡 Explanation:
A spring scale measures force or weight based on the extension of a calibrated spring.
Q71easy
Which instrument, used in vehicles and industrial settings, measures the amount of fuel or liquid remaining in a tank
1. AFuel gauge
2. BFlow meter
3. CPressure gauge
4. DSpeedometer
💡 Explanation:
A fuel gauge indicates the amount of fuel remaining in a vehicle's or equipment's tank.
Q72medium
Which instrument is used to accurately weigh very small masses, commonly used in laboratories and jewelry
1. AAnalytical balance
2. BBathroom scale
3. CSpring scale (less precise)
4. DPlatform scale
💡 Explanation:
An analytical balance is a highly precise instrument used to measure very small masses accurately.
Q73easy
Which simple indicator, often made from litmus paper, changes color to indicate whether a solution is acidic or basic
1. ALitmus test
2. BpH meter (instrument, not indicator itself)
3. CSpectrometer
4. DRefractometer
💡 Explanation:
A litmus test uses litmus paper, which changes color (red for acidic, blue for basic) to indicate a solution's general acidity.
Q74medium
Which instrument is used to measure the acidity or alkalinity of a solution, expressed on a numerical scale
1. ApH meter
2. BBarometer
3. CHygrometer
4. DAnemometer
💡 Explanation:
A pH meter measures the acidity or alkalinity (pH level) of a solution.
Q75medium
Which instrument, commonly used by physicians, measures a patient's body temperature using a probe placed in the ear
1. AOral thermometer
2. BTympanic (ear) thermometer
3. CInfrared forehead thermometer
4. DRectal thermometer
💡 Explanation:
A tympanic thermometer measures body temperature via a probe inserted into the ear canal.
Q76medium
Which scale is used to categorize the intensity of hurricanes based on wind speed
1. ARichter scale
2. BBeaufort scale
3. CFujita scale
4. DSaffir-Simpson scale
💡 Explanation:
The Saffir-Simpson scale categorizes hurricane intensity into five categories based on sustained wind speed.
Q77medium
Which scale is used to categorize the intensity of tornadoes based on resulting damage
1. ARichter scale
2. BBeaufort scale
3. CFujita scale (Enhanced Fujita Scale)
4. DSaffir-Simpson scale
💡 Explanation:
The Fujita scale (now Enhanced Fujita Scale) categorizes tornado intensity based on the damage caused.
Q78medium
Which scale is used to categorize wind speed and its observed effects, particularly at sea
1. ARichter scale
2. BBeaufort scale
3. CFujita scale
4. DKelvin scale
💡 Explanation:
The Beaufort scale categorizes wind speed based on observed effects, particularly useful historically at sea.
Q79medium
What scale is commonly used alongside seismograph data to express the magnitude of an earthquake
1. ARichter scale
2. BBeaufort scale
3. CFahrenheit scale
4. DFujita scale
💡 Explanation:
The Richter scale (and related magnitude scales) is used to express the magnitude of earthquakes based on seismograph data.
Q80medium
Which instrument, used by geologists, measures the strength and characteristics of seismic waves during earthquakes
1. ABarometer
2. BSeismograph
3. CAnemometer
4. DHygrometer
💡 Explanation:
A seismograph records the intensity, duration, and direction of seismic waves during earthquakes.

Jump to page:

Scientific Instruments & Their Uses MCQs 2026

More Everyday Science Topics