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Process Control and Instrumentation

Strain gage uses an electrical conductor wire, which when elastically stretched increases in length and reduces in diameter. Both these dimensional changes result in ____________ in the electrical resistance of the wire ?

Process Control and Instrumentation /
Strain gage uses an electrical conductor wire, which when elastically stretched increases in length and reduces in diameter. Both these dimensional changes result in ____________ in the electrical resistance of the wire ?

A. No change
B. Decrease
C. Increase
D. Exponential decrease

Strain gage uses an electrical conductor wire, which when elastically stretched increases in length and reduces in diameter. Both these dimensional changes result in ____________ in the electrical resistance of the wire ? Read More »

Process Control and Instrumentation

Which of the following filled system expansion thermometer has the capability to measure the lowest temperature ?

Process Control and Instrumentation /
Which of the following filled system expansion thermometer has the capability to measure the lowest temperature ?

A. Mercury in glass thermometer
B. Mercury in steel thermometer
C. Alcohol in glass thermometer
D. Fused metal (Na or K) in steel thermometer

Which of the following filled system expansion thermometer has the capability to measure the lowest temperature ? Read More »

Process Control and Instrumentation

Working principle of mercury in glass thermometer is based on volumetric expansion of mercury with increase in temperature. Which of the following undergoes minimum volumetric expansion for a given temperature change ?

Process Control and Instrumentation /
Working principle of mercury in glass thermometer is based on volumetric expansion of mercury with increase in temperature. Which of the following undergoes minimum volumetric expansion for a given temperature change ?

A. Water
B. Mercury
C. Methyl alcohol
D. Carbon-tetrachloride

Working principle of mercury in glass thermometer is based on volumetric expansion of mercury with increase in temperature. Which of the following undergoes minimum volumetric expansion for a given temperature change ? Read More »

Process Control and Instrumentation

Flow rate of those fluids which are insensitive to changes in their density, viscosity or flow velocity profile can be best measured by a ________________?

Process Control and Instrumentation /
Flow rate of those fluids which are insensitive to changes in their density, viscosity or flow velocity profile can be best measured by a ________________?

A. Magnetic flowmeter
B. Pitot tube
C. Flow nozzle type flowmeter
D. Turbine flowmeter

Flow rate of those fluids which are insensitive to changes in their density, viscosity or flow velocity profile can be best measured by a ________________? Read More »

Process Control and Instrumentation