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