#1
Which of the following is an example of a non-contact measurement tool?
Proximity sensor
ExplanationUtilizes electromagnetic fields to detect the presence or absence of an object without physical contact.
#2
Which of the following is a primary unit of measurement for mass in the International System of Units (SI)?
Kilogram
ExplanationFundamental unit for expressing mass, defined as the mass of the international prototype of the kilogram.
#3
Which of the following is a common unit for measuring luminous intensity?
Candela
ExplanationStandard unit for measuring the intensity of light emitted in a particular direction.
#4
Which of the following is a common unit for measuring electrical capacitance?
Farad
ExplanationUnit of electrical capacitance, representing one coulomb of charge per volt of potential difference.
#5
What does the term 'resolution' refer to in measurement instruments?
The smallest detectable change in a quantity
ExplanationDefines the precision or smallest increment of measurement that an instrument can detect.
#6
In metrology, what does the acronym 'NIST' stand for?
National Institute of Standards and Technology
ExplanationGovernment agency responsible for promoting standards and technology in various fields.
#7
What is the purpose of a tachometer in measurement instruments?
Counting revolutions per minute (RPM)
ExplanationMeasures the rotational speed of a shaft or disk.
#8
In surveying, what does a theodolite measure?
Direction or angle
ExplanationInstrument used for measuring both horizontal and vertical angles in surveying.
#9
Which instrument is commonly used for measuring electrical resistance?
Ohmmeter
ExplanationSpecifically designed to measure electrical resistance in circuits.
#10
What is the purpose of a Vernier scale in measurement tools?
To improve accuracy in measurements
ExplanationProvides a means to make precise measurements by allowing interpolation between the divisions of the main scale.
#11
Which type of micrometer is specifically designed for measuring the thickness of objects like paper or sheet metal?
Thickness micrometer
ExplanationOptimized for accurately measuring the thickness of flat objects.
#12
What is the main function of a spectrophotometer?
Analyzing chemicals in a sample
ExplanationMeasures the amount of light absorbed by a substance to determine its concentration or composition.