Process Control and Instrumentation

_______________ thermometer cannot measure sub-zero (< 0° C) temperature ?

Byadmin March 5, 2019August 24, 2021

_______________ thermometer cannot measure sub-zero (< 0° C) temperature ?

A. Mercury in glass
B. Bimetallic
C. Vapor pressure
D. Resistance

Process Control and Instrumentation

The time constant of a first order process with resistance R and capacitance C is__________________?

The time constant of a first order process with resistance R and capacitance C is__________________?

A. R + C
B. R – C
C. RC
D. 1/RC

Read More The time constant of a first order process with resistance R and capacitance C is__________________?
Process Control and Instrumentation

Photoelectric pyrometers are suitable in the temperature range of ________________ °C?

Photoelectric pyrometers are suitable in the temperature range of ________________ °C?

A. 400-1600
B. 800-1600
C. 800-2500
D. 400-1000

Read More Photoelectric pyrometers are suitable in the temperature range of ________________ °C?
Process Control and Instrumentation

Emf developed by a thermocouple, while measuring a temperature of 600°C is about 5.5 mV. The type of thermocouple used is_______________?

Emf developed by a thermocouple, while measuring a temperature of 600°C is about 5.5 mV. The type of thermocouple used is_______________?

A. Chromel-alumel
B. Iron-constantan
C. Platinum-platinum + rhodium
D. Either A., B. or C.

Read More Emf developed by a thermocouple, while measuring a temperature of 600°C is about 5.5 mV. The type of thermocouple used is_______________?
Process Control and Instrumentation

Dome temperature of blast furnace stove is most accurately measured by a____________________?

Dome temperature of blast furnace stove is most accurately measured by a____________________?

A. Radiation pyrometer
B. platinum-platinum/rhodium thermocouple
C. Iron-constantan thermocouple
D. Platinum resistance thermometer

Read More Dome temperature of blast furnace stove is most accurately measured by a____________________?
Process Control and Instrumentation

Polarograph is meant for the analysis of __________________?

Polarograph is meant for the analysis of __________________?

A. Gaseous mixture
B. Miscible liquids
C. Solids
D. Isotopes

Read More Polarograph is meant for the analysis of __________________?
Process Control and Instrumentation

Mercury thermometer is commonly used for low temperature measurement. The freezing point and boiling point of mercury are respectively _____________ °C?

Mercury thermometer is commonly used for low temperature measurement. The freezing point and boiling point of mercury are respectively _____________ °C?

A. – 39 and 350
B. – 51 and 439
C. – 79 and 395
D. – 10 and 425

Read More Mercury thermometer is commonly used for low temperature measurement. The freezing point and boiling point of mercury are respectively _____________ °C?

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