Q. For a feed back control system to be stable, the

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Q. __________ is the static characteristics of an instrument,

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Q. Phase lag of the frequency response of a second order system to a sinusoidal forcing function

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Q. Dead zone in an instrument must be less than __________ percent of the scale.

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Q. Emission spectroscopy is used for

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

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Q. __________ controller has the maximum stabilising time.

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Q. Out of the following temperature measuring instruments, the measurement accuracy will be minimum for the

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Q. Stalagmometer is used for the measurement of

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Q. The deflection in diaphragm (which is used as pressure sensor in pneumatic and electronic instruments) is dependent on the metal thickness, its diameter (d) and shape & number of corrugations. Its deflection is proportional to

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Q. Thermal conductivity cell is the primary element of a/an __________ analyser.

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Q. Zirconia probe is used for the measurement of

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Q. The root locus method, a pole of a transfer function G(s) is the value of s for which G(s) approaches

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Q. __________ type of element is normally not used in the bimetallic thermometers.

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Q. Suppose that the gain, time constant and dead time of a process with the following transfer function: Gc(s) = 10 exp( - 0.1s)/(0.5s + 1) are known with a possible error of ± 20% of their values. The largest permissible gain Kc of a proportional controller needs to be calculated below taking the values of process gain, time constant and dead time as

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Q. Process degree of freedom indicates __________ number of controllers to be used.

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Q. Characteristic equation is the denominator of __________ loop transfer function.

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Q. Operating range of a temperature measuring instrument is 800 to 1600°C. It could be a/an __________ pyrometer.

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Q. Polarograph is meant for the analysis of

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Q. Which of the following fluid flow measuring devices can measure the largest flow rate ?

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