31. Volumetric expansion is the working principle of the __________ thermometers.
32. Smoke density of the flue gas going out of the chimney is measured by a
33. Flow rate of those fluids which are insensitive to changes in their density, viscosity or flow velocity profile can be best measured by a
34. The initial value (t = 0) of the unit step response of the transfer function $$\frac{{\left( {{\text{s}} + 1} \right)}}{{\left( {2{\text{s}} + 1} \right)}}$$ is
35. The function of a transducer is to
36. Thermisters which have a very high temperature co-efficient of resistivity belong to the class of solid called
37. Gain margin is equal to the
38. A sinusoidal variation in the input passing through a linear first order system
39. Continuous measurement of specific gravity of a liquid is done by
40. Pick out the one which is a first order instrument.
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