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