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