When a bare thermocouple is covered by a protective sheath, the response becomes
Dilatometer is used to measure
All the thermocouples used for temperature measurement use dissimilar metal
The unit step response of the transfer functionreaches its final steady state assymptotically after
The offset introduced by proportional controller with gain Kcin response of first order system can be reduced by
What is the normal percentage of rhodium in platinum + rhodium element used in the thermocouple ?
Helium gas constant volume thermometer is suitable for the measurement of a temperature of __________ °C.
Psychrometer determines the
Which of the following is not a speed measuring instrument ?
Liquid discharge from a tank or reservoir can not be measured by
Stabilising time for the controllers is the time required for the response to reach __________ percent of its ultimate value.
Accurate temperature measurement performance of a radiation pyrometer can not be affected, if the
The transfer function of a process is . If a step change is introduced into the system, then the response will be
The Laplace transform of a sinusoidal function (eg; sin at) is represented by the curve
Very low pressure is expressed in microns(μ), which is equal to __________ mm of Hg coloumn (absolute) at 0°C.
__________ thermometer can not measure sub-zero (<C) temperature,
The experimental response of the controlled variable y(t) for a step change of magnitude P in the manipulated variable x(t) is shown below :The appropriate transfer function of the process is
Pyrometry refers to the measurement of temperature
Change of angle of refraction with composition comprises the working principle of a
Photoelectric pyrometers are suitable in the temperature range of __________ °C.
Which of the following instruments is not used for measuring sub-zero (<0°) temperatures ?
Non-metallic diaphragm used as pressure sensor in instruments is generally made of
Which of the following is not suitable for measuring the temperature of a red hot object in the range of- 1600°C ?
Response of a linear control system for a change in set point is called
Pick out the wrong statement
Which of the following thermometers is not suitable for distant reading uptometres?
A non-linear chemical system is exemplified by a/an
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 60°, then the dead time (in minutes) is
The temperature range for which copper resistance thermometer can be used is __________ °C
Hot wire anemometer is used for the measurement of
Range of hydrogen gas constant volume themometer is __________ °C.
Degree to which an instrument indicates the changes in measured variable without dynamic error is called its
Thermistors are made of
The frequency response of a first order system, has a phase shift with lower and upper bounds given by
A mercury barometer measures the __________ pressure.
Flame photometry is used for the determination of compositional analysis of
Which of the following does not figure in the list of seven substances selected for international temperature scale ?
Paramagnetism method is not used for the composition determination of __________ in gases.
The initial value (t=of the unit step response of the transfer function [(s + 1)/(+ 1)] is
A barometer measures the __________ pressure.
Gas chromatography is used for the measurement of
Positioning controllers are used for
A constant volume gas thermometer employing __________ is used to measure sub-zero (i.e., <C) temperature.
pH meter has
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