1. The __________ of a vapor pressure thermometer is a functioning element.
2. A negative gain margin expressed in decibels means a/an __________ system.
3. Thermistor, which has high temperature co-efficient of resistivity, is used as the sensing element in resistance thermometer. It is a/an
4. Flapper nozzle is used in a/an __________ controller.
5. Typical specifications for design stipulates the gain margin and phase margin to be respectively
6. Working principle of radiation pyrometer is based on the
7. Which of the following relates the emf. generated in a single homogeneous wire to the temperature difference ?
8. Dilute wine was used as a thermometric liquid initially to develop temperature scale. First emperical temperature scale developed was the __________ scale.
9. In a single tank system, the transfer function of level to inlet flow rate is
10. Which of the following is a desirable characteristic of an instrument ?
11. The operation of a rotameter is based on
12. The temperature of tempering oil baths maintained at 400°C during heat treatment of steel is measured by a/an __________ thermocouple.
13. Instrumentation in a plant offers the advantage of
14. Which of the following temperature measuring instruments need not touch the object whose temperature is being measured ?
15. Thermal conductivity measurement com-prises the working principle of a
16. Response of a system to a sinusoidal input is called __________ response.
17. The closed loop pole of a stable second order system could be
18. Smoke density of the flue gas going out of the chimney is measured by a
19. Transfer function of transportation lag is
20. Temperature measuring instruments are standardised mostly with __________ points of pure substances.
21. Pick out the first order system from among the following.
22. The maximum service temperature for fibre glass used as thermocouple wire insulation material is __________ °C.
23. Which of the following controllers has the least maximum deviation ?
24. Volumetric expansion is the working principle of the __________ thermometers.
25. Which of the following measurements can be made by the measurement of emf ?