0% 0 Process Control and Instrumentation Quiz 1 1 / 50 A magnetic flowmeter is__________? Based on the linear relationship between the fluid flow rate and the induced voltage Based on the principle of Faraday?s law All A., B. and C. Capable of measuring the flow rate of slurries and electrolytes 2 / 50 Composition of alloys can be determined by __________? None of these Refractometer Chromatograph Polarograph 3 / 50 Bode stability method uses _____ loop transfer function? Neither A. nor B. Closed Either A. or B. Open 4 / 50 A proportional controller with a gain of Kc is used to control a first order process. The offset will increase, if_________? Kc is increased Kc is reduced Integral control action is introduced Derivative control action is introduced 5 / 50 A mercury barometer measures the ______ pressure? Vacuum Gauge Atmospheric Absolute 6 / 50 Bourdon tube is never made of_________? Phosphor bronze Monel metal Cast iron Stainless steel 7 / 50 _____ stability method uses open loop transfer function? Mikhailov Nyquist Ruth None of these 8 / 50 A manometer measures the ______ pressure? Gauge Atmospheric Absolute None of these 9 / 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 ? NO2 NO CO2 O2 10 / 50 _____ are analysed using a Polarograph? Isotonic solutions Gases Liquids Solids 11 / 50 Bode diagram are generated from output response of the system subjected to which of the following input ? Ramp Impulse Step Sinusoidal 12 / 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_______? 45? -90? -180? -45? 13 / 50 A system with transfer function [(2S/4S) + 1] is of ______ order? 1st 2nd 3rd Zero 14 / 50 A stable system is the one_____? For which the output response is bounded for all bounded input Which exhibits an unbounded response to a bounded input None of these Which satisfies the conditions for a servo problem 15 / 50 An aneroid barometer measures the ______ pressure? Atmospheric Gage Absolute Vacuum 16 / 50 A simple pitot tube measures the_____? Maximum velocity Point velocity Static pressure Average velocity 17 / 50 Composition of natural gas is determined by the__________? Both B. and C. Haldane apparatus Chromatograph Mass spectrometer 18 / 50 ______ is an example of distributed parameter system ? Tubular reactor On-off controller CSTR None of these 19 / 50 A bimetallic thermometer as compared to industrial mercury in glass thermometer has almost the same__________? Temperature measuring range (- 40?C to 450?C) Speed of response All a, b & c Accuracy (? 1% of span) 20 / 50 Cascade control means ________? Feed forward control One feed-back loop More than one feed-back loop On-off control 21 / 50 ________ thermometer cannot measure sub-zero (< 0? C) temperature ? Resistance Mercury in glass Bimetallic Vapor pressure 22 / 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? Nyquist None of these Bode stability Routh stability 23 / 50 Characteristic equation is the denominator of _____ loop transfer function? Both A. and B. Open Neither A. nor B. Closed 24 / 50 A pyranometer is an instrument used for measuring the_____? Global radiation None of these Bright sunshine period Beam radiation 25 / 50 Change of angle of refraction with composition comprises the working principle of a_____? Refractometer Spectrometer Polarimeter Polarograph 26 / 50 _____ is the static characteristics of an instrument? Drift Response Tine lag Dynamic error 27 / 50 All the thermocouples used for temperature measurement use dissimilar metal _________? Beads Bars Wires Strips 28 / 50 Bimetal strips are not used in_________? Thermostats Thermocouples Bimetallic thermometers Relays for opening & closing of electrical circuits 29 / 50 Configuration of Bourdon spring tube is never made of ______ shape? Semi-circular Spiral Circular Helical 30 / 50 A system with a double pole at the origin is unstable since the corresponding term in the time domain_________? Is a constant Grows linearly with time Decays linearly with time Grows exponentially with time 31 / 50 A constant volume gas thermometer employing _______ is used to measure sub-zero (i.e., < 0?C) temperature? Nitrogen Hydrogen Helium None of these 32 / 50 A negative gain margin expressed in decibels means a/an _____ system? Unstable None of these Critically damped Stable 33 / 50 A typical example of a physical system with under damped characteristic is a______? Thermocouple kept immersed in a liquid filled thermowell Spring loaded diaphragm valve CSTR with first order reaction U-tube manometer 34 / 50 A non-linear chemical system is exemplified by a/an__________? Mixer Isothermal CSTR None of these Non-isothermal CSTR 35 / 50 A barometer measures the ______ pressure? Gauge Absolute Absolute as well as gauge dynamic 36 / 50 A bolometer is ___________? Used for the measurement of thermal radiation An element which senses optical input and delivers thermal output Both A. & B. Neither A. nor B. 37 / 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________? Voltage Flux density Light intensity Current 38 / 50 Compositional analysis of _______ is done using mass spectrometer? An isotope An alloy A solid Natural gas 39 / 50 An amplitude ratio of 0.1 corresponds to ______ decibels? -20 10 -10 20 40 / 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__________? 90? 45? 180? 0? 41 / 50 Compositional analysis of flue gas coming out of a furnace in respect of O2 and CO2% can be continuously done by a/an_____? Thermal conductivity cell Zirconia probe Chromatograph Orsat apparatus 42 / 50 Concentration of sugar solution can be determined by the___________? Flame photometry Polarimetry Oscillometry Emission spectroscopy 43 / 50 A sinusoidal variation in the input passing through a linear first order system __________? Gets amplified (magnitude increases) Becomes more oscillatory (frequency increases) Becomes less oscillatory (frequency decreases) Gets attenuated (magnitude decreases) 44 / 50 A mercury thermometer cannot be used to measure the temperature below the freezing point of mercury, which is ______ ?C? -38.9 -80.9 -60.9 -11.9 45 / 50 A non-linear system will have ______ steady state values? Three Two More than one One 46 / 50 _______ is undesirable in thermocouples used in industries ? Non-linear relation of emf to temperature Corrosion resistance Oxidation resistance Linear relation of emf to temperature 47 / 50 A pyrheliometer is an instrument used for measuring the__________? Beam radiation None of these Diffuse radiation Bright sunshine period 48 / 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_______? 0.5 0.25 1 1/?2 49 / 50 _______ controller has the maximum stabilising time? PI PD PID P 50 / 50 Accurate temperature measurement performance of a radiation pyrometer cannot be affected, if the ? Object is transparent Object and surrounding are at almost the same temperature Object has varying emissivity Enhancement or attenuation of radiation occurs in the sighting path Provide Your Information Your score is The average score is 0% LinkedIn Facebook Twitter 0% Restart quiz Send feedback Share on facebook Facebook Share on twitter Twitter Share on whatsapp WhatsApp PrevPolymer Technology Quiz 2 Process Control and Instrumentation Quiz 2Next
