Electrical Measurements and Instrumentation MCQs (Part-13)

Which device is commonly used for temperature measurement in electrical systems?

A Strain gauge
B Thermistor
C Thermocouple
D Piezoelectric sensor

What is the main principle behind a thermistor?

A Resistance change with temperature
B Resistance change with pressure
C Voltage change with current
D Current change with voltage

Which of the following instruments is used for measuring pressure?

A Thermocouple
B Strain gauge
C Voltmeter
D Pressure sensor

What is the working principle of a piezoelectric sensor?

A Changes voltage with temperature
B Generates electrical charge with stress
C Measures strain by current
D Measures temperature via resistance

How does a strain gauge measure force?

A By detecting changes in resistance
B By measuring voltage
C By measuring current
D By detecting changes in temperature

What is the purpose of a thermocouple in electrical measurement?

A To measure resistance
B To measure temperature
C To measure pressure
D To measure voltage

Which type of thermocouple is commonly used in high temperature measurements?

A Type K
B Type T
C Type J
D Type E

What does a barometer measure?

A Temperature
B Pressure
C Voltage
D Current

How do pressure transducers work?

A By converting temperature to pressure
B By converting mechanical stress to electrical signal
C By changing resistance with pressure
D By using a moving coil to measure force

What effect does temperature have on a thermistor?

A Resistance decreases with temperature
B Resistance increases with temperature
C Resistance remains constant
D It changes with pressure

What kind of error can affect pressure measurements?

A Systematic error
B Random error
C Environmental error
D Instrumental error

Which of these instruments measures small changes in temperature?

A Thermocouple
B Thermistor
C Strain gauge
D Barometer

What is the primary application of a manometer?

A Current measurement
B Temperature measurement
C Pressure measurement
D Voltage measurement

How does a piezoelectric sensor generate an electrical signal?

A Through magnetic induction
B By applying voltage
C By measuring current flow
D By stress or pressure

What is a major advantage of using a thermocouple for temperature measurements?

A High accuracy
B High sensitivity
C Wide temperature range
D Low cost