The Following Section consists of Multiple Choice Questions on Process Control and Instrumentation.
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Process Control and Instrumentation MCQ
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Question 1 of 20
1. Question
1 pointsWhich of the following is an undesirable dynamic characteristic of an instrument ?
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Question 2 of 20
2. Question
1 pointsWhich of the following is not the triple point of water ?
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Question 3 of 20
3. Question
1 pointsLoad cells are used for the measurement of
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Question 4 of 20
4. Question
1 pointsWhich of the following is the dynamic characteristics of an instrument ?
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Question 5 of 20
5. Question
1 pointsThe __________ of a vapor pressure thermometer is a functioning element.
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Question 6 of 20
6. Question
1 pointsA negative gain margin expressed in decibels means a/an __________ system.
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Question 7 of 20
7. Question
1 pointsThermistor, which has high temperature co-efficient of resistivity, is used as the sensing element in resistance thermometer. It is a/an
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Question 8 of 20
8. Question
1 pointsFlapper nozzle is used in a/an __________ controller.
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Question 9 of 20
9. Question
1 pointsTypical specifications for design stipulates the gain margin and phase margin to be respectively
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Question 10 of 20
10. Question
1 pointsWorking principle of radiation pyrometer is based on the
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Question 11 of 20
11. Question
1 pointsWhich of the following relates the emf. generated in a single homogeneous wire to the temperature difference ?
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Question 12 of 20
12. Question
1 pointsDilute wine was used as a thermometric liquid initially to develop temperature scale. First emperical temperature scale developed was the __________ scale.
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Question 13 of 20
13. Question
1 pointsWhich of the following is a desirable characteristic of an instrument ?
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Question 14 of 20
14. Question
1 pointsThe operation of a rotameter is based on
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Question 15 of 20
15. Question
1 pointsThe temperature of tempering oil baths maintained at 400°C during heat treatment of steel is measured by a/an __________ thermocouple.
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Question 16 of 20
16. Question
1 pointsWhich of the following temperature measuring instruments need not touch the object whose temperature is being measured ?
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Question 17 of 20
17. Question
1 pointsResponse of a system to a sinusoidal input is called __________ response.
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Question 18 of 20
18. Question
1 pointsThe closed loop pole of a stable second order system could be
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Question 19 of 20
19. Question
1 pointsSmoke density of the flue gas going out of the chimney is measured by a
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Question 20 of 20
20. Question
1 pointsPick out the first order system from among the following.
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Process Control and Instrumentation MCQ 2
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Question 1 of 20
1. Question
1 pointsThe maximum service temperature for fibre glass used as thermocouple wire insulation material is __________ °C.
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Question 2 of 20
2. Question
1 pointsWhich of the following controllers has the least maximum deviation ?
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Question 3 of 20
3. Question
1 pointsVolumetric expansion is the working principle of the __________ thermometers.
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Question 4 of 20
4. Question
1 pointsZirconia probe is used for the continuous measurment of __________ flue gases going out of the furnace.
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Question 5 of 20
5. Question
1 pointsCompositional analysis of __________ is done using mass spectrometer.
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Question 6 of 20
6. Question
1 pointsThe function of a transducer is to
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Question 7 of 20
7. Question
1 pointsNichol’s chart deals with
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Question 8 of 20
8. Question
1 pointsWhich of the following thermocouples will give the highest output for the same value of hot and cold junction temperature ?
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Question 9 of 20
9. Question
1 points__________ is undesirable in thermocouples used in industries,
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Question 10 of 20
10. Question
1 pointsSelect the correct statement from the following.
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Question 11 of 20
11. Question
1 pointsContinuous shell temperature measurement in a liquid-liquid heat exchanger is done by a
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Question 12 of 20
12. Question
1 pointsThe __________ of a vapor pressure thermometer is a secondary element.
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Question 13 of 20
13. Question
1 pointsWhich of the following relates the absorption & evolution of heat at the junctions of a thermocouple to the current flow in the circuit?
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Question 14 of 20
14. Question
1 pointsWhich of the following is not a differential pressure flow meter ?
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Question 15 of 20
15. Question
1 pointsWorking principle of mercury in glass thermometer is based on volumetric expansion of mercury with increase in temperature. Which of the following undergoes minimum volumetric expansion for a given temperature change ?
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Question 16 of 20
16. Question
1 pointsA 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
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Question 17 of 20
17. Question
1 pointsA typical example of a physical system with under damped characteristic is a
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Question 18 of 20
18. Question
1 pointsAn aneroid barometer measures the __________ pressure.
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Question 19 of 20
19. Question
1 pointsThermal wells are used in the temperature measurement to
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Question 20 of 20
20. Question
1 pointsA system with a double pole at the origin is unstable since the corresponding term in the time domain
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Process Control and Instrumentation MCQ 3
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Question 1 of 20
1. Question
1 pointsThe temperature range for which copper resistance thermometer can be used is __________ °C
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Question 2 of 20
2. Question
1 pointsParamagnetism method is not used for the composition determination of __________ in gases.
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Question 3 of 20
3. Question
1 pointsAn amplitude ratio of 0.1 corresponds to __________ decibels.
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Question 4 of 20
4. Question
1 pointsPressure of 0.0001 absolute psi can be measured by __________ gauge.
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Question 5 of 20
5. Question
1 pointsPirani gauge is used for the measurement of
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Question 6 of 20
6. Question
1 points__________ thermometer can not measure sub-zero (< 0° C) temperature,
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Question 7 of 20
7. Question
1 pointsStarting temperature of optical radiation pyrometer is __________ °C.
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Question 8 of 20
8. Question
1 pointsThe deflection of the free end of the bimetallic strips in a bimetallic thermometer with temperature is nearly
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Question 9 of 20
9. Question
1 pointsAlphatron measures pressure __________ microns.
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Question 10 of 20
10. Question
1 pointsThe term analogous to the electrical current in a thermal system is the
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Question 11 of 20
11. Question
1 pointsReset rate is the another term used for __________ time.
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Question 12 of 20
12. Question
1 pointsContinuous measurement of moisture in paper is done by
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Question 13 of 20
13. Question
1 pointsPsychrometer determines the
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Question 14 of 20
14. Question
1 pointsA mercury barometer measures the __________ pressure.
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Question 15 of 20
15. Question
1 pointsPositioning controllers are used for
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Question 16 of 20
16. Question
1 pointsThe amplitude ratio for the sinusoidal response of a __________ is 1.
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Question 17 of 20
17. Question
1 pointsThe response of two tanks of same size and resistance in series is
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Question 18 of 20
18. Question
1 pointsThe amplitude ratio for the sinusoidal response of __________ is < 1.
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Question 19 of 20
19. Question
1 pointsWhich of the following is a ‘contact’ pyrometer ?
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Question 20 of 20
20. Question
1 pointsMeasurement of sub-zero Celcius temperature in industry is done most commonly by
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Process Control and Instrumentation MCQ 4
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Question 1 of 20
1. Question
1 pointsLiquid discharge from a tank or reservoir can not be measured by
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Question 2 of 20
2. Question
1 pointsWhich of the following is not a mechanical pressure sensing element ?
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Question 3 of 20
3. Question
1 points__________ are analysed using a polarograph.
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Question 4 of 20
4. Question
1 pointsWhich of the following judges the accuracy of an instrument ?
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Question 5 of 20
5. Question
1 pointsOn-off controllers are normally used for
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Question 6 of 20
6. Question
1 pointsMagnetic flowmeters are generally not used for the velocity/flow measurement of hydrocarbons due to their
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Question 7 of 20
7. Question
1 pointsWhich of the following controllers has maximum offset ?
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Question 8 of 20
8. Question
1 pointsPressure of 0.01 psi (absolute) can be measured by __________ gauge.
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Question 9 of 20
9. Question
1 pointsHigh temperature of around 2000°C of incandescent gas mantles is measured by a/an
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Question 10 of 20
10. Question
1 pointsThe time constant of a unity gain, first order plus time delay process is 5 min. If the phase lag at a frequency of 0.2 rad/min is 60°, then the dead time (in minutes) is
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Question 11 of 20
11. Question
1 pointsWhich of the following does not figure in the list of seven substances selected for international temperature scale ?
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Question 12 of 20
12. Question
1 pointsA constant volume gas thermometer employing __________ is used to measure sub-zero (i.e., < 0° C) temperature.
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Question 13 of 20
13. Question
1 pointspH meter has
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Question 14 of 20
14. Question
1 pointsRouth test
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Question 15 of 20
15. Question
1 pointsWhen a bare thermocouple is covered by a protective sheath, the response becomes
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Question 16 of 20
16. Question
1 pointsWhat is the normal percentage of rhodium in platinum + rhodium element used in the thermocouple ?
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Question 17 of 20
17. Question
1 pointsHelium gas constant volume thermometer is suitable for the measurement of a temperature of __________ °C.
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Question 18 of 20
18. Question
1 pointsBode diagram are generated from output response of the system subjected to which of the following input?
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Question 19 of 20
19. Question
1 pointsWhich of the following thermocouples is the most suitable for measuring a temperature of about 1600°C in an oxidizing atmosphere ?
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Question 20 of 20
20. Question
1 pointsMercury thermometer can be used to measure the temperature upto __________ °C.
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