Q.1
Concentration of sugar solution can be determined by the
Q.2
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
Q.3
The response of two tanks of same size and resistance in series is
Q.4
Composition of natural gas is determined by the
Q.5
Thermocouple is suitable for measuring
Q.6
Continuous measurement of moisture content of paper in paper industry is done by measuring the
Q.7
Measurement of sub-zero Celcius temperature in industry is done most commonly by
Q.8
Degree to which an instrument indicates the changes in measured variable without dynamic error is called its
Q.9
Time constant is the
Q.10
Optical activity of a solution can be determined using a
Q.11
Thermal wells are used in the temperature measurement to
Q.12
Thermocouple in a thermal well behaves as a true
Q.13
Strain gage uses an electrical conductor wire, which when elastically stretched increases in length and reduces in diameter. Both these dimensional changes result in __________ in the electrical resistance of the wire.
Q.14
On-off controllers are normally used for
Q.15
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.
Q.16
Thermal conductivity cell is the primary element of a/an __________ analyser.
Q.17
Which thermocouple can be used to measure a temperature of around 1400°C ?
Q.18
The deflection of the free end of the bimetallic strips in a bimetallic thermometer with temperature is nearly
Q.19
What is the ratio of output amplitude to input amplitude for a sinusoidal forcing function in a first order system?
Q.20
Working principle of radiation pyrometer is based on the
Q.21
Thermistors are made of
Q.22
For increased speed of response of an expansion pressure spring thermometer, the thermometer bulb should have a
Q.23
A pyranometer is an instrument used for measuring the
Q.24
A pyrheliometer is an instrument used for measuring the
Q.25
Feed forward controller accounts for the __________ changes.
Q.26
Magnetic flowmeters are generally not used for the velocity/flow measurement of hydrocarbons due to their
Q.27
The transfer function of a process is 1/(16s² + 8s + 4). If a step change is introduced into the system, then the response will be
Q.28
Reset rate is the another term used for __________ time.
Q.29
Pyrometry refers to the measurement of temperature
Q.30
Which of the following is never used as an element of industrial resistance thermometer?
Q.31
Suppose that the gain, time constant and dead time of a process with the following transfer function:Gc(s) = 10 exp( - 0.1s)/(0.5s + 1) are known with a possible error of ± 20% 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
Q.32
Which of the following thermocouples has the least temperature measurement range?
Q.33
For measuring the temperature of a red hot furnace, which is the most suitable instrument?
Q.34
An aneroid barometer measures the __________ pressure.
Q.35
Meleoid gauge measures the __________ pressure.
Q.36
A manometer measures the __________ pressure.
Q.37
Which of the following thermocouples is capable of measuring a temperature of -50°C?
Q.38
Which of the following is not a variable area flow meter?
Q.39
Flow rate of a river is measured by a/an
Q.40
Composition of alloys can be determined by
Q.41
In a single tank system, the transfer function of level to inlet flow rate is
Q.42
The root locus method, a pole of a transfer function G(s) is the value of s for which G(s) approaches
Q.43
The __________ of a vapor pressure thermometer is a secondary element.
Q.44
When the damping co-efficient (ξ) is unity, the system is
Q.45
For a feed back control system to be stable, the
Q.46
In a closed loop system, the process to be controlled is an integrating process with transfer function l/2s. The controller proposed to be used in an integral controller with transfer function 1/T₁s. When a step change in set point is applied to such a closed loop system, the controlled variable will exhibit
Q.47
Which of the following controllers has maximum offset?
Q.48
Which of the following relates the emf. generated in a single homogeneous wire to the temperature difference?
Q.49
Emission spectroscopy is used for
Q.50
Temperature of molten pig iron (1450°C) and molten slag (1500°C) flowing out of a blast furnace is measured by a/an
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