Process Control and Instrumentation Quiz 6
1 / 57
What is the overall transfer function (C/R) of the following block diagram if G = G1. G2. G3 and H = H1.H2 ?
2 / 57
Which of the following relates the emf. generated in a single homogeneous wire to the temperature difference ?
3 / 57
Which of the following thermometers is not suitable for distant reading upto 60 metres ?
4 / 57
Working principle of disappearing filament type optical pyrometer is based on the _________?
5 / 57
Which of the following thermocouples is the most suitable for measuring a temperature of about 1600?C in an oxidizing atmosphere ?
6 / 57
Which of the following is an undesirable dynamic characteristic of an instrument ?
7 / 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 ?
8 / 57
Which of following error integral is considered as the best criterion in controller settings ?
9 / 57
Which of the following cannot measure a temperature of 1600?C ?
10 / 57
Which of the following thermocouples has the widest temperature measurement range ?
11 / 57
Which of the following instruments is not used for measuring sub-zero (<0?) temperatures ?
12 / 57
Working principle of radiation pyrometer is based on the _________?
13 / 57
Which of the following filled system expansion thermometer has the capability to measure the lowest temperature ?
14 / 57
Which of the following shows maximum dip effect (indicating reverse direction of temperature change) ?
15 / 57
Which of the following fluid flow measuring devices can measure the largest flow rate ?
16 / 57
Which of the systems having the following transfer function is stable ?
17 / 57
Which of the following is not a composition measuring instrument ?
18 / 57
Which of the following is not a variable area flow meter ?
19 / 57
Which of the following thermocouples has the least temperature measurement range ?
20 / 57
Which of the following is the dynamic characteristics of an instrument ?
21 / 57
Zirconia probe is used for the measurement of_____?
22 / 57
Working principle of mercury in glass thermometer is___________?
23 / 57
Which of the following is a desirable characteristic of an instrument ?
24 / 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 ?
25 / 57
Working principle of radiation pyrometer is based on the ___________?
26 / 57
Which of the following can measure temperatures in the range of ? 20 to 300?C ?
27 / 57
Which of the following is never used as an element of industrial resistance thermometer ?
28 / 57
Which thermocouple can be used to measure a temperature of around 1400?C ?
29 / 57
Which of the following is a ?contact? pyrometer ?
30 / 57
Which of the following is not a second order instrument ?
31 / 57
Which of the following thermocouples can measure the maximum temperature ?
32 / 57
What is the Laplace transform of sin t ?
33 / 57
What is the normal percentage of rhodium in platinum + rhodium element used in the thermocouple ?
34 / 57
Which of the following flow-metering instruments is an areameter ?
35 / 57
Which of the following thermocouples will give the highest output for the same value of hot and cold junction temperature ?
36 / 57
With increase in temperature, the electrical conductivity of the platinum used in the resistance thermometer ?
37 / 57
Which of the systems having following transfer functions is stable ?
38 / 57
Working principle of mercury in glass thermometer is based on the _______ of mercury with increase in temperature?
39 / 57
Which of the following is not suitable for measuring the temperature of a red hot object in the range of 800 ? 1600?C ?
40 / 57
Which of the following controllers has the least maximum deviation ?
41 / 57
Which of the following measurements can be made by the measurement of emf ?
42 / 57
Which of the following is not a mechanical pressure sensing element ?
43 / 57
Which of the following is not classified as a thermo electric pyrometer ?
44 / 57
Which of the following relates the absorption & evolution of heat at the junctions of a thermocouple to the current flow in the circuit ?
45 / 57
Which of the following filled system expansion thermometers has the lowest positive temperature measurement capability ?
46 / 57
Which of the following temperature measuring instruments need not touch the object whose temperature is being measured ?
47 / 57
Which is the most suitable instrument for measuring pressure below 3 microns ?
48 / 57
Which is the strongest paramagnetic gas ?
49 / 57
When the damping co-efficient (?) is unity, the system is ___________?
50 / 57
Which of the following thermocouple materials does not contain nickel ?
51 / 57
Which of the following is not the triple point of water ?
52 / 57
Which of the following is not a differential pressure flow meter ?
53 / 57
Zirconia probe is used for the continuous measurement of _______ flue gases going out of the furnace?
54 / 57
What is the ratio of output amplitude to input amplitude for a sinusoidal forcing function in a first order system ?
55 / 57
Which of the following controllers has maximum offset ?
56 / 57
Which of the following judges the accuracy of an instrument ?
57 / 57
Which of the following thermocouples is capable of measuring a temperature of -50?C ?
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