Sensors and Instrumentation- Pre-Requisite

Which of the following is not a fundamental dimension?

• a) Mass

• b) Volume

• c) Time

• d) Length

What is the SI unit of luminous intensity?

• Candela

• Kelvin

• Ampere

• Mole

The resolution of a measuring instrument refers to:

• Its ability to measure accurately

• Its smallest detectable change in the measured quantity

• Its linearity

• Its precision

Which of the following instruments is used to measure electrical resistance?

• Voltmeter

• Ammeter

• Ohmmeter

• Galvanometer

The term "calibration" in metrology refers to:

• Adjusting the instrument to improve accuracy

• Comparing the instrument's measurements to a known standard

• Reducing measurement uncertainty

• Increasing the range of measurement

Which of the following statements about precision and accuracy is true?

• A measurement can be precise but not accurate

• A measurement can be accurate but not precise

• Precision refers to the closeness of repeated measurements to each other

• Accuracy refers to the closeness of a measurement to the true value

What is the purpose of a Vernier scale?

• To measure small distances with high precision

• To measure large distances with high accuracy

• To convert between different units of measurement

• To measure angles in geometric constructions

The concept of "zero error" in measurement refers to:

• An error that occurs due to improper calibration

• An error that occurs when the measured value is close to zero

• An error that occurs when the instrument gives a nonzero reading when the quantity measured is zero

• An error that occurs due to rounding off the measured value

Which of the following instruments is used to measure atmospheric pressure?

• Barometer

• Manometer

• Altimeter

• Hygrometer

What does the acronym "NIST" stand for in the context of metrology?

• National Institute of Standards and Technology

• National Institute of Scientific Testing

• National Institute of Systematic Tools

• National Institute of Standardization and Testing