Which of the following is never used as an element of industrial resistance thermometer ?
Bimetal strips are not used in
Which of the following is not a variable area flow meter ?
The unit of 'time constant' of a system is the same as that of
Which of the following filled system expansion thermometers has the lowest positive temperature measurement capability ?
Suppose that the gain, time constant and dead time of a process with the following transfer function:Gc(s) =exp( - 0.1s)/(0.5s +are known with a possible error of ±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
Bourdon tube is never made of
Compositional analysis of flue gas coming out of a furnace in respect of O2 and CO2% can be continuously done by a/an
Which of the following thermocouples is capable of measuring a temperature of -50°C?
The term analogous to voltage in a single tank system is the
__________ is an example of distributed parameter system
Which of the following is not a composition measuring instrument ?
0n-off control which is a special case of proportional control, has a band width of about __________ percent.
Composition of natural gas is determined by the
Which of the following shows maximum dip effect (indicating reverse direction of temperature change) ?
A stable system is the one
When the damping co-efficient (ξ) is unity, the system is
Nickel percentage in invar which is an iron-nickel alloy, and is used as a thermocouple material is
With increase in temperature, the electrical conductivity of the platinum used in the resistance thermometer
Liquid column manometers are used for measuring the pressure __________ kgf/cm2 .
Cascade control means
"An emf of the order of mV is generated when two solutions of different hydrogen ion concentration are separated by a thin glass wall". This is the working principle of a
Thermisters which have a very high temperature co-efficient of resistivity belong to the class of solid called
The pressure sensing element of elastic type pressure gauge is never made in the form of a
Find the ultimate gain and frequency for a proportional controller in the case of a process having the transfer function Gp(s) = 1/(4s + 1)(2s + 1)(s + 1).
Temperature of __________ can not be measured by an optical or radiation pyrometer.
In a shell and tube heat exchanger, the outlet temperature of heating/cooling fluid is the __________ variable.
Mcleoid gauge is used to measure the
Pick out the wrong statement.
Working principle of mercury in glass thermometer is
If response of a control system is to be free of offset and oscillation, the most suitable controller is
In second order underdamped system,
Temperature of molten pig iron (1450°C) and molten slag (1500°C) flowing out of a blast furnace is measured by a/an
Which of the following is not classified as a thermo electric pyrometer ?
Emf developed by a thermocouple while measuring a temperature of 800°C is aboutmV. The type of thermocouple used is
The thermal emf-temperature relationship of most thermocouples is
Which is the strongest paramagnetic gas?
For measuring the temperature of a red hot furnace, which is the most suitable instrument ?
Platinum resistance thermometer can be used upto antimony point which is __________ °C, and is the temperature of equilibrium between solid antimony & liquid antimony at normal atmospheric pressure.
Gain margin is equal to the
Which of the following measurements can be made by the measurement of emf ?
The frequency at which maximum amplitude ratio is attained is called the __________ frequency.
A bimetallic thermometer as compared to industrial mercury in glass thermometer has almost the same
Conversion formula for converting amplitude ratio (AR) into decibels is
Dome temperature of blast furnace stove is most accurately measured by a
For two non-interacting first order systems connected in series, the overall transfer function is the __________ of the individual transfer functions.
Maximum differential pressure in liquid manometer is __________ psi.
Which of the following thermocouples is incapable of measuring sub-zero (i.e., < 0°C) temperature ?
In Bode plot, A.R. vs. w is plotted on a/an __________ graph paper.
Continuous measurement of specific gravity of a liquid is done by