0% 0 Process Control and Instrumentation Quiz 2 1 / 50 In Bode plot, A.R. vs. w is plotted on a/an ______ graph paper? Triangular Ordinary Log-lag Semi-log 2 / 50 In a single tank system, the transfer function of level to inlet flow rate is___________? None of these R/(TS + 1) 1/TS R/TS 3 / 50 Conversion formula for converting amplitude ratio (AR) into decibels is _________? Decibel = 20 loge (AR) Decibel = 20 log10 (AR)0.5 Decibel = 20 loge (AR)0.5 Decibel = 20 log10 (AR) 4 / 50 Flow rate of sludge is not measured by a/an__________? Both B. & C. Orificemeter Open weir Kennison nozzle 5 / 50 In an exothermic chemical reactor, the manipulated variable is the flow rate of________? Product Coolant None of these Reactants 6 / 50 Continuous measurement of specific gravity of a liquid is done by ___________? Hydrometer Both A. and C. Displacement meter Contact-type electric indicators 7 / 50 Degree to which an instrument indicates the changes in measured variable without dynamic error is called its _____? Reproducibility Static characteristics Fidelity Speed of response 8 / 50 Emission spectroscopy is used for___________? Determining water purity Solids and metal analysis Determination of CO2 in gases NOx determination 9 / 50 Flapper nozzle is used in a/an _______ controller? Hydraulic Pneumatic Electronic None of these 10 / 50 E.m.f. generated by thermocouples is of the order of _________? Volts Milli volts Micro volts Kilo volts 11 / 50 For a feed back control system to be stable, the __________? Poles of the closed loop transfer function should lie in the left half of the complex plane Poles of the closed loop transfer function should lie in the right half of the complex plane Bode plots of the corresponding open loop transfer function should monotonically decrease Roots of the characteristic equation should be real 12 / 50 Dilatometer is used to measure ___________? Deflection Contraction/expansion due to changes in temperature Stress Strain 13 / 50 In a shell and tube heat exchanger, the flow rate of heating/cooling fluid is the _______ variable? Controlled None of these Load Manipulated 14 / 50 Flame photometry is used for the determination of compositional analysis of________? Alkali metals Isotopes Natural gas Solids 15 / 50 Continuous measurement of moisture content of paper in paper industry is done by measuring the__________? Thermal conductivity through the paper Electrical resistance through the paper None of these Magnetic susceptibility 16 / 50 Emf developed by a thermocouple while measuring a temperature of 800?C is about 31 mV. The type of thermocouple used is_________? None of these Iron-constantan Chromel-alumel Platinum-platinum + rhodium 17 / 50 In a closed loop system, the process to be controlled is an integrating process with transfer function 1/2s. The controller proposed to be used in an integral controller with transfer function 1/T1s. When a step change in set point is applied to such a closed loop system, the controlled variable will exhibit___________? Underdamped response Undamped response Overdamped response Unstable response 18 / 50 Hot wire anemometer is used for the measurement of_____? Flow rates of fluids Very high temperature Flow rates of granular solids Thermal conductivity of gases 19 / 50 For increased speed of response of an expansion pressure spring thermometer, the thermometer bulb should have a___________? Large area but small mass All A , B & C Small specific heat High thermal conductivity 20 / 50 For an input forcing function, X(t) = 2t2, the Laplace transform of this function is_________? 4/s2 2/s3 2/s2 4/s3 21 / 50 Feed forward controller accounts for the _______ changes? Set point Neither A. nor B. Load Both A. & B. 22 / 50 Dead zone is the___________? None of these Same as time constant Maximum change in the variable that does not change the reading of the instrument Same as transportation lag 23 / 50 Continuous measurement of moisture in paper is done by________? Sling psychrometer Hair-hygrometer High resistance Wheatstone bridge circuit Weighing 24 / 50 In a shell and tube heat exchanger, the inlet temperature of heating/cooling fluid is the _____ variable? Manipulated None of these Load Controlled 25 / 50 Dome temperature of blast furnace stove is most accurately measured by a______? platinum-platinum/rhodium thermocouple Platinum resistance thermometer Iron-constantan thermocouple Radiation pyrometer 26 / 50 For two non-interacting first order systems connected in series, the overall transfer function is the _______ of the individual transfer functions? Ratio Product Difference Sum 27 / 50 In a single tank system, the transfer function of ______ to inlet flow rate is 1/(TS+1)? Outlet flow rate Both A. & B. Level Neither A. nor B. 28 / 50 Find the ultimate gain and frequency for a proportional controller in the case of a process having the transfer function Gp(s) = 1/(4s + 1)(2s + 1)(s + 1) ? w = 1, Kc = 13 w = ?(7/8), Kc = 45/4 w = 1/?14, Kc = 45/7 ?14 w = ?(7/6), Kc = 46/3 29 / 50 Emf developed by a thermocouple, while measuring a temperature of 600?C is about 5.5 mV. The type of thermocouple used is________? Chromel-alumel Either A., B. or C. Iron-constantan Platinum-platinum + rhodium 30 / 50 For measuring the temperature of a red hot furnace, which is the most suitable instrument ? Bimetallic thermometer Platinum resistance thermometer Thermocouple Optical pyrometer 31 / 50 High temperature of around 2000?C of incandescent gas mantles is measured by a/an ___________? Specially designed thermocouple Optical pyrometer None of these Radiation pyrometer 32 / 50 Flow rate measurement of hostile acids and alkalis can be most suitably done by a/an _________? Magnetic flow meter Hot wire anemometer Venturimeter Orificemeter 33 / 50 Flow rate through an orifice is ______ the pressure differential? Inversely proportional to the square of Proportional to the square root of Proportional to Inversely proportional to the square root of 34 / 50 If response of a control system is to be free of offset and oscillation, the most suitable controller is__________? Proportional integral-derivative (PID) controller Proportional-integral (PI) controller Proportional controller Proportional-derivative (PD) controller 35 / 50 Emf generated in a thermocouple depends on the temperature _____? Difference between cold junction and atmospheric temperature Of cold junction only Of hot junction only Difference between hot and cold junctions 36 / 50 In a shell and tube heat exchanger, the outlet temperature of heating/cooling fluid is the ______ variable? Load None of these Manipulated Controlled 37 / 50 Identify an unbounded input from inputs whose transfer functions are given below_______? 1 1/S 1/S2 1/(S2 + 1) 38 / 50 In a feed-back control system G and H denote open loop and close loop transfer functions respectively. The output-input relationship is______? G/H G/(1 + H) H/G H/(1 + G) 39 / 50 Humidity of air can be determined by a___________? Mass spectrometer Polarimeter Chromatograph Sling psychrometer 40 / 50 Helium gas constant volume thermometer is suitable for the measurement of a temperature of _______ ?C? < 100 > 0 < 0 > 800 41 / 50 Gas chromatography is used for the measurement of _________? Flow rate Temperature Pressure Concentration 42 / 50 In a second order under damped system, the__________? None of these Time required for the response of first reach its ultimate value is called the response time Decay ratio (which is the ratio of the sizes of successive peaks) is equal to the reciprocal of overshoot Overshoot (which is a measure of how much the response exceeds the ultimate value) increase with the decrease of damping co-efficient 43 / 50 Gain margin is equal to the__________? Gain in P-I controller Gain in P controller Amplitude ratio Reciprocal of amplitude ratio 44 / 50 Continuous shell temperature measurement in a liquid-liquid heat exchanger is done by a ___________? Resistance thermometer Vapor pressure thermometer Thermocouple Mercury in glass thermometer 45 / 50 For the time domain function f(t) = t, the Laplace transform of ?0 t f(t) dt is given by_____? 1/S3 1/2 S3 2/S2 2/S3 46 / 50 Dilute wine was used as a thermometric liquid initially to develop temperature scale. First empirical temperature scale developed was the ______ scale? Fahrenheit Centigrade Kelvin Reaumer 47 / 50 Flow rate of those fluids which are insensitive to changes in their density, viscosity or flow velocity profile can be best measured by a _________? Pitot tube Turbine flowmeter Magnetic flowmeter Flow nozzle type flowmeter 48 / 50 Gas analysis is commonly done using the_____? X-ray diffraction Mass spectrometer Thermal conductivity cell Emission spectrometer 49 / 50 Emf developed by a thermocouple while measuring a temperature of 400?C is 22 mV. The type of thermocouple used is _____? Platinum-rhodium Iron-constantan Chromel-alumel Platinum-platinum + rhodium 50 / 50 Flow rate of a river is measured by a/an______? Pitot tube Open weir Kennison nozzle Vane meter 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 PrevProcess Control and Instrumentation Quiz 1 Process Control and Instrumentation Quiz 3Next
