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Chemical Engineering · all questions

Process Control And Instrumentation
practice.

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Which of the following is a desirable characteristic of an instrument?

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__________ is the static characteristics of an instrument,

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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

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Photoelectric pyrometers are suitable in the temperature range of __________ °C.

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A mercury thermometer can not be used to measure the temperature below the freezing point of mercury, which is __________ °C.

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Mercury thermometer is commonly used for low temperature measruement. The freezing point and boiling point of mercury are respectively __________ °C.

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Load cells are used for the measurement of

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Thermistors are used in __________ devices.

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The amplitude ratio for the sinusoidal response of __________ is < 1.

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The amplitude ratio for the sinusoidal response of a __________ is 1.

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__________ is undesirable in thermocouples used in industries,

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The __________ of a vapor pressure thermometer is a primary element.

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Polarisation of light forms the working principle of a

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A constant volume gas thermometer employing __________ is used to measure sub-zero (i.e., < 0° C) temperature.

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Which of the following thermocouples is incapable of measuring sub-zero (i.e., < 0°C) temperature?

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Routh test

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What is the dynamic error in a critically damped second order instrument for a ramp input (AT)?

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Radiation pyrometers as compared to thermocouples

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Liquid levels in autocalves are measued by

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__________ stability method uses open loop transfer function.

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