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Practical Temperature Measurements


Quiz Questions

1.What does RTD stand for?
Resistance Temperature Detector
Resistor Temperature Detector
Real Temperature Detector
None of the above
2. _________ is an A/D technique which essentially averages noise over a full line cycle, thus power line-related noise and its harmonics are virtually eliminated.
Tree switching
Filtration
Integration
Thermal shunting
3.__________ is a method of organizing the channels of a scanner into groups, each with its own main switch.
Thermal shunting
Tree switching
Decalibration
Galvanic action
4.____________ describes the process of unintentionally altering the physical makeup of the thermocouple wire so that it no longer conforms to the NIST polynomial within specified limits.
Thermal Shunting
Decalibration
Galvanic Action
None of the above
5.The integrity of a thermocouple system may be improved by following these precautions ________?
Avoid steep temperature gradients
Use isolated inputs with ample offset capability
Avoid mechanical stress and vibration, which could strain the wires
All of the above
6.All metals produce a positive change in resistance for a positive change in temperature. This, of course, is the main function of an RTD.
True
False
7. In the following figure what is temperature coefficient?
Practical Temp Measurements 1
β
α
δ
None of the above
8._____________ is the act of altering the measurement temperature by inserting a measurement transducer.
Thermal shunting
Decalibration
Self Heating
None of the above
9. Thermistors are more susceptible to permanent decalibration at high temperatures than are RTD’s or thermocouples.
True
False
10.The following figure explains which law?
Practical Temp Measurements 2
The law of inserted metals
The law of interior temperatures
The law of intermediate metals
None of the above