Ordinary mercury in glass thermometer is used for measuring temperature upto 120°C. However, for measuring higher temperature upto __________ °C, thermometer is made by filling nitrogen under pressure above the mercury, which stops the evaporation of mercury and reduces the chance of broken thread of mercury.

Process Control and Instrumentation
Ordinary mercury in glass thermometer is used for measuring temperature upto 120°C. However, for measuring higher temperature upto __________ °C, thermometer is made by filling nitrogen under pressure above the mercury, which stops the evaporation of mercury and reduces the chance of broken thread of mercury.

700

550

250

350

700

550

250

350

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Process Control and Instrumentation
Degree to which an instrument indicates the changes in measured variable without dynamic error is called its

Reproducibility

Fidielity

Static characteristics

Speed of response

Reproducibility

Fidielity

Static characteristics

Speed of response

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Process Control and Instrumentation
Routh test

Can not determine as to how many roots of the characteristics equation have positive real roots

Cannot be used to test the stability of a control system containing transportation lag

Criterion provides information about the actual location of roots

Criterion is not applicable to systems with polynomial characteristic equation

Can not determine as to how many roots of the characteristics equation have positive real roots

Cannot be used to test the stability of a control system containing transportation lag

Criterion provides information about the actual location of roots

Criterion is not applicable to systems with polynomial characteristic equation

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Process Control and Instrumentation
Emission spectroscopy is used for

Determination of CO₂ in gases

Determining water purity

Solids and metal analysis

NOxdetermination

Determination of CO₂ in gases

Determining water purity

Solids and metal analysis

NOxdetermination

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Process Control and Instrumentation
The offset introduced by proportional controller with gain Kc in response of first order system can be reduced by

Reducing value of Kc

None of these

Introducing derivative control

Introducing integral control

Reducing value of Kc

None of these

Introducing derivative control

Introducing integral control

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Process Control and Instrumentation
Reference points i.e., ice point and steam point in Reaumer temperature scale are respectively

32° & 80°

- 273° & 80°

0° & 80°

32° & 460°

32° & 80°

- 273° & 80°

0° & 80°

32° & 460°

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Process Control and Instrumentation

Process Control and Instrumentation Degree to which an instrument indicates the changes in measured variable without dynamic error is called its

Process Control and Instrumentation Routh test

Process Control and Instrumentation Emission spectroscopy is used for

Process Control and Instrumentation The offset introduced by proportional controller with gain Kc in response of first order system can be reduced by

Process Control and Instrumentation Reference points i.e., ice point and steam point in Reaumer temperature scale are respectively

Process Control and Instrumentation
Degree to which an instrument indicates the changes in measured variable without dynamic error is called its

Process Control and Instrumentation
Routh test

Process Control and Instrumentation
Emission spectroscopy is used for

Process Control and Instrumentation
The offset introduced by proportional controller with gain Kc in response of first order system can be reduced by

Process Control and Instrumentation
Reference points i.e., ice point and steam point in Reaumer temperature scale are respectively