Electrical Measurements and Instrumentation MCQs (Part-5)

Which device is used to measure the power consumed in an electrical circuit?

A Ohmmeter
B Voltmeter
C Wattmeter
D Ammeter

What does an energy meter measure?

A Energy consumption
B Power
C Voltage
D Current

Which instrument is used to measure both current and voltage in a circuit?

A Wattmeter
B Multimeter
C Ammeter
D Voltmeter

Which of the following is used to measure very high voltages?

A Oscilloscope
B Galvanometer
C Ammeter
D High voltage probe

What is the main function of a transducer in electrical measurement?

A Convert energy form
B Measure current
C Measure power
D Generate voltage

What is the purpose of a frequency meter in electrical measurements?

A Measure power
B Measure voltage
C Measure frequency
D Measure current

Which device is used to measure small currents with high sensitivity?

A Voltmeter
B Galvanometer
C Wattmeter
D Ammeter

What type of sensor is used to measure strain?

A Pressure sensor
B Thermocouple
C Displacement sensor
D Strain gauge

What does a strain gauge measure in a material?

A Strain
B Pressure
C Temperature
D Displacement

What principle does a piezoelectric sensor operate on?

A Change in capacitance
B Generation of electrical charge under stress
C Change in resistance
D Change in voltage

How does thermal noise affect electrical measurements?

A Increases precision
B Increases accuracy
C Reduces power consumption
D Reduces signal clarity

What is the function of shielding in electrical measurements?

A Increase signal speed
B Increase signal strength
C Prevent signal noise
D Reduce signal distortion

What does a displacement sensor typically measure?

A Position or movement
B Speed
C Temperature
D Pressure

What does a torque sensor measure?

A Voltage
B Pressure
C Rotational force
D Speed

What type of noise is commonly reduced using filters in electrical measurement systems?

A Electromagnetic interference (EMI)
B White noise
C Random noise
D Thermal noise