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