38251. Working 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 ?
38252. Bourdon gauges are used for measuring pressure (kg/cm2 )
38253. A 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
38254. A typical example of a physical system with under damped characteristic is a
38255. An aneroid barometer measures the __________ pressure.
38256. A bolometer is
38257. Thermal wells are used in the temperature measurement to
38258. The offset introduced by proportional controller with gain Kcin response of first order system can be reduced by
38259. A system with a double pole at the origin is unstable since the corresponding term in the time domain
38260. To increase the speed of response of a pressure spring liquid or gas expansion thermometer, the clearance space between the thermometer bulb and the thermal well should not be filled with
38261. In a second order under damped system, the
38262. In an exothermic chemical reactor, the manipulated variable is the flow rate of
38263. Very low pressure is expressed in microns(μ), which is equal to __________ mm of Hg coloumn (absolute) at 0°C.
38264. The inverse Laplace transform of the function is
38265. Thermal conductivity based continuous flue gas analyser makes use of varying thermal conductivity of the constituents of flue gases. Which of the following constituents of flue gases has the maximum thermal conductivity ?
38266. Emf generated in a thermocouple depends on the temperature
38267. Working principle of mercury in glass thermometer is based on the __________ of mercury with increase in temperature.
38268. Number of poles in a system with transfer function is
38269. Radiation thermometer can not measure the temperature
38270. Temperature measurement by optical pyrometer is done above __________ point, which is 1063°C.
38271. Continuous flue gas analyser makes use of paramagnetic properties of some of its constituents, which move towards the strongest part of the magnetic field thus displacing diamagnetic gases. Which of the following gases is diamagnetic ?
38272. Dilatometer is used to measure
38273. Mass spectrometer is used for the composition analysis of
38274. 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
38275. __________ stability method uses open loop transfer function.
38276. A pyranometer is an instrument used for measuring the
38277. All the thermocouples used for temperature measurement use dissimilar metal
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