True or False 1) Thermistors are constructed with prescribed metals. 2) Voltage

ID: 1842141 • Letter: T

Question

True or False

1) Thermistors are constructed with prescribed metals.

2) Voltage measurement for thermocouples must be made with no current flow.

3) RTD has the best accuracy among the devices we used to measure temperature.

4) The reason we use a ballast circuit on the thermistor is to increase the voltage output.

5) As for the strain gage, the measured voltage and the RTD resistance have a linear relationship.

6) The entire body of a total immersion liquid-in-glass thermometer needs to be submerged in the fluid to accurately measure the temperature.

7) The stagnation pressure is the largest pressure in the flow field.

8) The output voltage of the OP-AMP we used in the bandpass filter is always of opposite sign to the input voltage.

9) Frequency of the vibrational beam decrease linearly with the mass added to the free end.

1) False

reason- material used in a thermistor is ceramic or polymer. metals are used in resistance temperature detectors(RTDs).

2)True

reason- for seebeck voltage is the open circuit voltage. so no current flows.

3)True

reason- RTDs, have higher accuracy and repeatability

4)True

5)True

6)True

reason- It is designed to read correctly when the entire device is immersed in the test medium

7)True

reason-static pressure is at its maximum value at stagnation points.

8)True

reason- voltage gain is always -ve

9)false

reason- frequency increases with the mass added

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