Q61. What is the primary function of a Spectrometer?
a) Measure electric current
b) Measure wind speed
c) Measure altitude
d) Analyze the spectrum of light emitted or absorbed by a substance
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Correct Answer: d) Analyze the spectrum of light emitted or absorbed by a substance
Explanation: A spectrometer is an instrument used to analyze the spectrum of light emitted or absorbed by a substance. It separates and measures spectral components of a physical characteristic, such as the intensity of light as a function of wavelength. Spectrometers are used in various fields, including chemistry, physics, and astronomy, to study the properties of materials and celestial objects.
Q62. What does a Spherometer primarily measure?
a) Electric current
b) Wind speed
c) Altitude
d) Radius of curvature of a curved surface
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Correct Answer: d) Radius of curvature of a curved surface
Explanation: A spherometer is an instrument used for the precise measurement of the radius of curvature of a curved surface, such as lenses and mirrors. It is based on the principle of the micrometer screw and is used to measure small thicknesses of flat materials or the radius of curvature of a spherical surface.
Q63. What is the primary function of a Sphygmomanometer?
a) Measure electric current
b) Measure wind speed
c) Measure altitude
d) Measure blood pressure
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Correct Answer: d) Measure blood pressure
Explanation: A sphygmomanometer is an instrument used to measure blood pressure, particularly in arteries. It consists of an inflatable cuff to collapse and then release the artery under the cuff in a controlled manner, and a mercury or aneroid manometer to measure the pressure. Manual sphygmomanometers are used with a stethoscope when using the auscultatory technique.
Q64. What does a Stereoscope primarily detect?
a) Electric current
b) Wind speed
c) Altitude
d) Three-dimensional view of a specimen
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Correct Answer: d) Three-dimensional view of a specimen
Explanation: A stereoscope is an optical microscope that provides a three-dimensional view of a specimen. It uses two separate light paths with different viewing angles to create a 3D image of the object under investigation. Stereoscopes are commonly used for various applications, such as studying 3D objects, biological specimens, and materials at low magnification.
Q65. What is the primary function of a Stethoscope?
a) Measure electric current
b) Measure wind speed
c) Measure altitude
d) Listen to internal sounds in the human body
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Correct Answer: d) Listen to internal sounds in the human body
Explanation: A stethoscope is a medical instrument used to listen to internal sounds in the human body, such as heartbeats, lung sounds, and blood flow. It consists of a chest piece that captures the sounds and a tube that transmits the sounds to the earpieces. Stethoscopes are essential tools for healthcare professionals to diagnose and monitor various health conditions.
Q66. What does a Stroboscope primarily measure?
a) Electric current
b) Wind speed
c) Altitude
d) Visual analysis of objects in periodic motion
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Correct Answer: d) Visual analysis of objects in periodic motion
Explanation: A stroboscope is an instrument that emits a series of brief, intense flashing lights at specific intervals to make a cyclically moving object appear to be slow-moving or stationary. It is used for visual analysis of objects in periodic motion and for high-speed photography. Stroboscopes are used in various applications, including quality control, inspection operations, and studying rotors, gears, cams, shafts, liquid spray patterns, package filling, and sealing.
Q67. What is the primary function of a Tachometer?
a) Measure electric current
b) Measure wind speed
c) Measure altitude
d) Measure the rotation speed of a shaft or disk
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Correct Answer: d) Measure the rotation speed of a shaft or disk
Explanation: A tachometer is an instrument used to measure the rotation speed of a shaft or disk, as in a motor or other machine. It can be employed in various applications, such as testing the performance of engines, motors, and other rotating prime movers. Tachometers can also be used to determine the torque or power characteristics of a machine under test, as well as in emissions testing cycles for engines and powertrains.
Q68. What does a Tacheometer primarily measure?
a) Electric current
b) Wind speed
c) Altitude
d) Rapid measurements of horizontal and vertical positions of points on the earth’s surface
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Correct Answer: d) Rapid measurements of horizontal and vertical positions of points on the earth’s surface
Explanation: A tacheometer is a type of theodolite used for rapid measurements of horizontal and vertical positions of points on the earth’s surface relative to one another. It is a transit theodolite fitted with a special stadia diaphragm and is the main instrument of tacheometric surveying. Tacheometers are used in various applications, such as preparation of contoured plans or maps, location surveys for railways, roads, reservoirs, and hydrographic surveys.
Q69. What is the primary function of a Tangent Galvanometer?
a) Measure electric current
b) Measure wind speed
c) Measure altitude
d) Measure the presence, direction, and magnitude of electric current in a conductor
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Correct Answer: d) Measure the presence, direction, and magnitude of electric current in a conductor
Explanation: A tangent galvanometer is an early measuring instrument for electric current. It works based on the tangent law of magnetism, which states that the magnetic field at the center of a coil is proportional to the tangent of the angle between the magnetic needle and the horizontal component of the earth’s magnetic field. Tangent galvanometers are used to measure the presence, direction, and magnitude of electric currents in conductors.
Q70. What does a Telemeter primarily measure?
a) Electric current
b) Wind speed
c) Altitude
d) Distance between two objects
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Correct Answer: d) Distance between two objects
Explanation: A telemeter is an instrument used to measure the distance between two objects. It can operate based on various principles, such as time of flight, triangulation, or phase comparison. Telemeters are used in various applications, including surveying, navigation, and remote sensing, to determine distances between objects or points on the earth’s surface.