The 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 60o, then the dead time (in minutes) is
Which of the following does not figure in the list of seven substances selected for international temperature scale ?
A constant volume gas thermometer employing __________ is used to measure sub-zero (i.e., < 0o C) temperature.
pH meter has
The transfer function of a second order system is
The transfer function of a process is . If a step change is introduced into the system, then the response will be
Which of the following thermocouples is the most suitable for measuring a temperature of about 1600oC in an oxidizing atmosphere ?
Bode diagram are generated from output response of the system subjected to which of the following input?
Mercury thermometer can be used to measure the temperature upto __________ oC.
Which of the following is not a differential pressure flow meter ?
Vapour actuated pressure spring thermometer does not require ambient temperature compensation. Ambient temperature compensation is provided in gas or liquid expansion pressure spring thermometer by
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 ?
Bourdon gauges are used for measuring pressure (kg/cm2 )
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
A typical example of a physical system with under damped characteristic is a
An aneroid barometer measures the __________ pressure.
A bolometer is
Thermal wells are used in the temperature measurement to
The offset introduced by proportional controller with gain Kcin response of first order system can be reduced by
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 ?
The inverse Laplace transform of the function is
Emf generated in a thermocouple depends on the temperature
Working principle of mercury in glass thermometer is based on the __________ of mercury with increase in temperature.
The Laplace transform of a sinusoidal function (eg; sin at) is represented by the curve