Which of the following temperature measuring devices is widely used to measure the temperature in furnaces?
A.Resistance thermometer
B.Radiation pyrometer
C.Iron-constantan thermocouple
D.Bimetallic thermometer
Category: Instrumentation and Process Control Mcqs
Amount of moisture in air is determined by
A.refractometer
B.polarimeter
C.hygrometer
D.polarograph
Which one of the following static characteristics of instruments is undesirable?
A.Accuracy
B.Reproducibility
C.Sensitivity
D.Drift
Accuracy of an instrument is judged in terms of
A.drift
B.dead zone
C.static error
What temperature has the same numerical value in Fahrenheit and Kelvin scales?
A.273.15?
B.574.6?
C.459.6?
D.491.6?
Thermocouples use two
A.dissimilar metal wires
B.similar metal wires
C.similar metal strips
D.dissimilar metal strips
The generation of e.m.f. in thermocouples is fundamentally explained by
A.Ohms law
B.Stefan-Boltzmans law
C.Seebeck effect
D.Joule heating effect.
Which of the following is the most suitable to measure a temperature of -250?C?
A.Constant-volume helium thermometer
B.Paltinum resistance thermometer
C.Radiation pyrometer
D.Ordinary mercury-in-glass themometer
A constant-volume gas thermometer works on
A.the principle of Archimedes
B.Boyles law
C.Pascals law
D.Charles law
What temperature has the same numerical value in Fahrenheit and Centigrade scales?
A.32?
B.0?
C.100?
D.?40?
