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Process Control and Instrumentation Quiz 6

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Process Control and Instrumentation Quiz 6

1 / 57

Which of the following is the dynamic characteristics of an instrument ?

2 / 57

Which of the following is not a differential pressure flow meter ?

3 / 57

Which of the following is not a second order instrument ?

4 / 57

Working principle of bimetallic thermometers is difference in linear co-efficient of thermal expansion of two strips of different metals welded together. Which of the following has the maximum thermal co-efficient of linear expansion ?

5 / 57

What is the normal percentage of rhodium in platinum + rhodium element used in the thermocouple ?

6 / 57

Working principle of radiation pyrometer is based on the ___________?

7 / 57

What is the overall transfer function (C/R) of the following block diagram if G = G1. G2. G3 and H = H1.H2 ?

8 / 57

Which of the following thermocouples is the most suitable for measuring a temperature of about 1600?C in an oxidizing atmosphere ?

9 / 57

Which of the following thermometers is not suitable for distant reading upto 60 metres ?

10 / 57

Which of the following judges the accuracy of an instrument ?

11 / 57

Which of the following thermocouples has the least temperature measurement range ?

12 / 57

Which of the following is an undesirable dynamic characteristic of an instrument ?

13 / 57

Zirconia probe is used for the measurement of_____?

14 / 57

Which of the following is a ?contact? pyrometer ?

15 / 57

Which of the following is a desirable characteristic of an instrument ?

16 / 57

Which of the systems having following transfer functions is stable ?

17 / 57

Which of the following is not suitable for measuring the temperature of a red hot object in the range of 800 ? 1600?C ?

18 / 57

Which of the following is not a variable area flow meter ?

19 / 57

Working principle of radiation pyrometer is based on the _________?

20 / 57

Which of the following is not a mechanical pressure sensing element ?

21 / 57

Which of the following shows maximum dip effect (indicating reverse direction of temperature change) ?

22 / 57

Which thermocouple can be used to measure a temperature of around 1400?C ?

23 / 57

Which of the following measurements can be made by the measurement of emf ?

24 / 57

Which of the following thermocouples will give the highest output for the same value of hot and cold junction temperature ?

25 / 57

Which of the following fluid flow measuring devices can measure the largest flow rate ?

26 / 57

Which of the following temperature measuring instruments need not touch the object whose temperature is being measured ?

27 / 57

What is the Laplace transform of sin t ?

28 / 57

Which of the following instruments is not used for measuring sub-zero (<0?) temperatures ?

29 / 57

Which of following error integral is considered as the best criterion in controller settings ?

30 / 57

Which of the following is not a composition measuring instrument ?

31 / 57

Which of the following is not the triple point of water ?

32 / 57

Working principle of mercury in glass thermometer is based on volumetric expansion of mercury with increase in temperature. Which of the following undergoes minimum volumetric expansion for a given temperature change ?

33 / 57

Which of the following controllers has maximum offset ?

34 / 57

Which of the following controllers has the least maximum deviation ?

35 / 57

Which of the following filled system expansion thermometer has the capability to measure the lowest temperature ?

36 / 57

Which of the following filled system expansion thermometers has the lowest positive temperature measurement capability ?

37 / 57

Which of the following thermocouples can measure the maximum temperature ?

38 / 57

Which of the following can measure temperatures in the range of ? 20 to 300?C ?

39 / 57

Which of the following is not classified as a thermo electric pyrometer ?

40 / 57

Which of the following relates the absorption & evolution of heat at the junctions of a thermocouple to the current flow in the circuit ?

41 / 57

Which of the systems having the following transfer function is stable ?

42 / 57

Which of the following is never used as an element of industrial resistance thermometer ?

43 / 57

Working principle of mercury in glass thermometer is___________?

44 / 57

Working principle of mercury in glass thermometer is based on the _______ of mercury with increase in temperature?

45 / 57

Which of the following thermocouples is capable of measuring a temperature of -50?C ?

46 / 57

Which is the most suitable instrument for measuring pressure below 3 microns ?

47 / 57

What is the ratio of output amplitude to input amplitude for a sinusoidal forcing function in a first order system ?

48 / 57

Which of the following flow-metering instruments is an areameter ?

49 / 57

Which of the following relates the emf. generated in a single homogeneous wire to the temperature difference ?

50 / 57

Working principle of disappearing filament type optical pyrometer is based on the _________?

51 / 57

Which of the following cannot measure a temperature of 1600?C ?

52 / 57

When the damping co-efficient (?) is unity, the system is ___________?

53 / 57

With increase in temperature, the electrical conductivity of the platinum used in the resistance thermometer ?

54 / 57

Which of the following thermocouples has the widest temperature measurement range ?

55 / 57

Zirconia probe is used for the continuous measurement of _______ flue gases going out of the furnace?

56 / 57

Which of the following thermocouple materials does not contain nickel ?

57 / 57

Which is the strongest paramagnetic gas ?

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