# Instrumentation and Tools Multiple Choice Questions and Answers

In the field of instrumentation, various tools are used to measure and control physical quantities. These tools help engineers and technicians carry out their work more efficiently and accurately.

## Instrumentation and Tools Multiple Choice Questions

This article presents the top instrumentation and tools Multiple Choice Questions and Answers to test your knowledge of the industrial instruments. Each question will have four options and a short explanation of the correct answer.

## What is the function of a multimeter?

A. To measure temperature
B. To measure resistance
C. To measure pressure
D. To measure flow

Explanation: A multimeter is an instrument that can measure various electrical quantities such as voltage, current, and resistance.

## Which of the following is a temperature measurement element?

A. Thermocouple
B. Pressure gauge
C. Flow meter
D. Tachometer

Explanation: A thermocouple is a device that measures temperature by detecting a change in voltage when two different metals are joined together and held between cold & hot junctions.

## What is the function of a pressure transmitter?

A. To measure flow
B. To measure temperature
C. To measure pressure
D. To measure the level

Explanation: A pressure transmitter is an instrument that converts pressure into an electrical signal.

## Which of the following is used to measure the speed of a rotating shaft?

A. Thermocouple
B. Pressure gauge
C. Flow meter
D. Tachometer

Explanation: A tachometer is a device that measures the rotational speed of a shaft.

## What is the function of a flow transmitter?

A. To measure pressure
B. To measure temperature
C. To measure level
D. To measure flow

Explanation: A flow transmitter is an instrument that measures the flow rate of a fluid.

## Which of the following is used to measure the level of a liquid in a tank?

A. Pressure gauge
B. Level transmitter
C. Flow meter
D. Thermocouple

Explanation: A level transmitter is an instrument that measures the level of a liquid in a tank.

## What is the function of a thermistor?

A. To measure temperature
B. To measure pressure
C. To measure flow
D. To measure level

Explanation: A thermistor is a temperature-sensitive resistor that can be used to measure temperature.

## Which of the following is a measurement tool for electrical signals with waveforms?

A. Oscilloscope
B. Multimeter
C. Clamp Meter
D. HART

Explanation: An oscilloscope is a tool that displays and analyzes electrical signals.

## What is the function of a signal generator?

A. To measure temperature
B. To generate electrical signals
C. To measure pressure
D. To measure flow

Explanation: A signal generator is a device that generates electrical signals for testing and measurement purposes.

## Which of the following is a tool used to test the continuity of a circuit?

A. HART
B. Oscilloscope
C. Continuity tester
D. Signal generator

Explanation: A continuity tester is a tool used to test whether a circuit is complete.

## What is the function of a data logger?

A. To analyze data
B. To measure voltage
C. To record voltage
D. To record and store data

Explanation: A data logger is an instrument that records and stores data over time for later analysis.

## Which of the following is a tool used to measure humidity?

A. Hygrometer
B. Thermocouple
C. Pressure gauge
D. Tachometer

Explanation: Humidity is the amount of water vapor present in the air. To measure humidity, an instrument called a hygrometer is used. Hygrometers work by measuring the changes in electrical capacitance, resistance, or dew point that occur as the air is cooled to the point of condensation.

## What is the function of a temperature transmitter?

a) Measure temperature and convert it into an electrical signal
b) Measure pressure and convert it into an electrical signal
c) Measure flow and convert it into an electrical signal
d) None of the above

Answer: a) Measure temperature and convert it into an electrical signal

Explanation: A temperature transmitter is a device that measures temperature and converts it into a standardized electrical signal, which can then be sent to a control system or a display device. This electrical signal is typically a 4-20 mA signal, which represents the temperature measurement within a specified range.

## Which of the following instruments measures the pressure of a fluid?

a) Flow meter
b) Pressure gauge
c) Temperature gauge
d) Level transmitter

Explanation: A pressure gauge is an instrument used to measure the pressure of a fluid or gas. It typically consists of a dial or digital display that shows the pressure reading in units such as PSI or kPa. Pressure gauges are commonly used in industrial and process applications to monitor the pressure of fluids in pipelines, tanks, and other vessels.

## What is a multimeter used for?

a) Measuring voltage, current, and resistance
b) Measuring temperature
c) Measuring flow rate
d) Measuring pressure

Answer: a) Measuring voltage, current, and resistance

Explanation: A multimeter is a versatile instrument that can be used to measure voltage, current, and resistance in electrical circuits. It typically has several measurement modes and ranges, allowing it to be used in a variety of applications. Multimeters can also be used to test continuity, check diodes, and perform other electrical tests.

## What is a loop calibrator used for?

a) Calibrating temperature sensors
b) Calibrating pressure sensors
c) Calibrating flow sensors
d) Calibrating current loops

Explanation: A loop calibrator is a device used to calibrate and test current loops, which are commonly used in process control applications. It can generate and measure milliamp signals, which represent the current flowing through the loop. Loop calibrators can be used to check the accuracy of sensors, controllers, and other devices connected to the loop.

## What is the function of a pH meter?

a) Measure the pH of a solution
b) Measure the temperature of a solution
c) Measure the pressure of a solution
d) Measure the flow rate of a solution

Answer: a) Measure the pH of a solution

Explanation: A pH meter is a device used to measure the acidity or alkalinity of a solution. It works by measuring the electrical potential difference between a pH electrode and a reference electrode, which is proportional to the pH of the solution. pH meters are commonly used in laboratory and process applications to monitor the pH of solutions in industries such as food and beverage, pharmaceuticals, and wastewater treatment.

## Which of the following instruments is used to measure the flow rate of a liquid?

A. Thermocouple
B. Manometer
C. Rotameter
D. Hygrometer

Explanation: A rotameter is a device used to measure the flow rate of liquids and gases. It consists of a tapered tube and a float that moves up and down the tube based on the flow rate.

## Which of the following instruments is used to measure the pressure of a gas?

A. Thermometer
B. Manometer
C. Hydrometer
D. Tachometer

Explanation: A manometer is a device used to measure the pressure of a gas. It consists of a U-shaped tube filled with a liquid and is used to compare the pressure of the gas to the pressure of the liquid.

## Which of the following instruments is used to measure the temperature of an object without making contact?

A. Thermocouple
B. Pyrometer
C. Manometer
D. Hygrometer

Explanation: A pyrometer is a non-contact device used to measure the temperature of an object by detecting its thermal radiation.

## Which of the following instruments is used to measure the level of a liquid in a tank?

A. Thermocouple
B. Manometer
C. Capacitance probe
D. Tachometer

Explanation: A capacitance probe is a device used to measure the level of a liquid in a tank by detecting changes in capacitance between the probe and the liquid.

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

A. Voltmeter
B. Ohmmeter
C. Ammeter
D. Clamp Meter

Explanation: An ohmmeter is a device used to measure the electrical resistance of a material. It passes a small current through the material and measures the resulting voltage.

## Which of the following instruments is used to measure the intensity of light?

A. Thermocouple
B. Spectrophotometer
C. Manometer
D. Hygrometer

Explanation: A spectrophotometer is a device used to measure the intensity of light at different wavelengths. It works by splitting light into its component colors and measuring the intensity of each color.

## Which of the following instruments is used to measure the velocity of a fluid?

A. Anemometer
B. Manometer
C. Hygrometer
D. Tachometer

Explanation: An anemometer is a device used to measure the velocity of a fluid, usually air. It consists of cups that rotate in the wind, generating a voltage that is proportional to the velocity.

## Which of the following instruments is used to measure the density of a liquid?

A. Refractometer
B. Hydrometer
C. Thermocouple
D. Tachometer

Explanation: A hydrometer is a device used to measure the density of a liquid by determining its buoyancy in the liquid.

## Which of the following instruments is used to measure the viscosity of a liquid?

A. Viscometer
B. Manometer
C. Hygrometer
D. Tachometer

Explanation: A viscometer is an instrument used to measure the viscosity or flow rate of a liquid. It typically consists of a tube or container that holds the liquid and a device that measures the time it takes for the liquid to flow through a specific point in the container. The viscosity of a liquid is a measure of its resistance to flow and is affected by factors such as temperature, pressure, and composition.

## Which of the following instruments is used to measure the flow of liquids in pipes?

A. RTD
B. Orifice plate
C. Thermistor
D. Analyzer

Explanation: An orifice plate is a thin plate with a hole in the middle, which is placed in a pipe to create a constriction. The pressure drop across the orifice plate is used to calculate the flow rate of the liquid.

## Which of the following instruments is used to measure the temperature of a liquid?

A. Thermocouple
B. Anemometer
C. Tachometer
D. Manometer

Explanation: A thermocouple is a type of temperature sensor that measures the difference in temperature between two junctions of dissimilar metals.

## Which of the following instruments is used to detect the level of a liquid in a tank?

A. Float switch
B. Pressure gauge
C. Thermistor
D. Tachometer

Explanation: A float switch is a device that is used to detect the level of a liquid in a tank. It consists of a float that is attached to a switch, which is activated when the level of the liquid reaches a certain point.

## Which of the following instruments is used to measure the concentration of a gas in a sample?

A. Gas chromatograph
B. Mass spectrometer
C. Infrared spectrometer
D. X-ray diffractometer

Explanation: A gas chromatograph is an instrument that separates and analyzes the components of a gas mixture. It is commonly used to measure the concentration of gases in industrial processes and environmental monitoring.

Mike
May 4, 2023

Good questions

ahmed messallam
January 17, 2024

great information, thank you.