Process Control and Instrumentation Quiz 1
1 / 50
_______ is undesirable in thermocouples used in industries ?
2 / 50
An amplitude ratio of 0.1 corresponds to ______ decibels?
3 / 50
A first order system with a time constant of 1 min is subjected to frequency response analysis. At an input frequency of 1 radian/min, the phase shift is_______?
4 / 50
_____ are analysed using a Polarograph?
5 / 50
Cascade control means ________?
6 / 50
Configuration of Bourdon spring tube is never made of ______ shape?
7 / 50
Accurate temperature measurement performance of a radiation pyrometer cannot be affected, if the ?
8 / 50
A photo electric device in which the resistance of the metal is directly proportional to the light striking on it, is known as photo-conductive cell. Photoelectric transducers are used for the measurement of those parameters, which can be used to produce variation in________?
9 / 50
A stable system is the one_____?
10 / 50
A bolometer is ___________?
11 / 50
A system with a double pole at the origin is unstable since the corresponding term in the time domain_________?
12 / 50
A typical example of a physical system with under damped characteristic is a______?
13 / 50
Compositional analysis of _______ is done using mass spectrometer?
14 / 50
A manometer measures the ______ pressure?
15 / 50
Bode diagram are generated from output response of the system subjected to which of the following input ?
16 / 50
Composition of natural gas is determined by the__________?
17 / 50
A system with transfer function [(2S/4S) + 1] is of ______ order?
18 / 50
Characteristic equation is the denominator of _____ loop transfer function?
19 / 50
_______ controller has the maximum stabilising time?
20 / 50
_____ stability method uses open loop transfer function?
21 / 50
A mercury thermometer cannot be used to measure the temperature below the freezing point of mercury, which is ______ ?C?
22 / 50
A sinusoidal variation in the input passing through a linear first order system __________?
23 / 50
A negative gain margin expressed in decibels means a/an _____ system?
24 / 50
Concentration of sugar solution can be determined by the___________?
25 / 50
According to Bode stability criterion, a system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at frequency for which phase lag is__________?
26 / 50
Composition of alloys can be determined by __________?
27 / 50
Compositional analysis of flue gas coming out of a furnace in respect of O2 and CO2% can be continuously done by a/an_____?
28 / 50
______ is an example of distributed parameter system ?
29 / 50
All the thermocouples used for temperature measurement use dissimilar metal _________?
30 / 50
Continuous flue gas analyser makes use of paramagnetic properties of some of its constituents, which move towards the strongest part of the magnetic field thus displacing diamagnetic gases. Which of the following gases is diamagnetic ?
31 / 50
A pyranometer is an instrument used for measuring the_____?
32 / 50
_____ is the static characteristics of an instrument?
33 / 50
________ thermometer cannot measure sub-zero (< 0? C) temperature ?
34 / 50
A proportional controller with a gain of Kc is used to control a first order process. The offset will increase, if_________?
35 / 50
A bimetallic thermometer as compared to industrial mercury in glass thermometer has almost the same__________?
36 / 50
A magnetic flowmeter is__________?
37 / 50
A constant volume gas thermometer employing _______ is used to measure sub-zero (i.e., < 0?C) temperature?
38 / 50
Bode stability method uses _____ loop transfer function?
39 / 50
A non-linear chemical system is exemplified by a/an__________?
40 / 50
Bimetal strips are not used in_________?
41 / 50
A barometer measures the ______ pressure?
42 / 50
A first order system with unity gain and time constant ? is subjected to a sinusoidal input of frequency w = 1/?. The amplitude ratio for this system is_______?
43 / 50
?A control system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at the crossover frequency.? This is ________ criterion?
44 / 50
A simple pitot tube measures the_____?
45 / 50
A mercury barometer measures the ______ pressure?
46 / 50
A pyrheliometer is an instrument used for measuring the__________?
47 / 50
Change of angle of refraction with composition comprises the working principle of a_____?
48 / 50
A non-linear system will have ______ steady state values?
49 / 50
An aneroid barometer measures the ______ pressure?
50 / 50
Bourdon tube is never made of_________?
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