Pick out the most suitable instrument for measuring temperature in the range of-40 to 425°C.
Pick out the most suitable instrument for measuring temperature in the range of-40 to 425°C.
With increase in temperature, the electrical conductivity of the platinum used in the resistance thermometer
With increase in temperature, the electrical conductivity of the platinum used in the resistance thermometer
For an input forcing function, X(t) = 2t², the Laplace transform of this function is
For an input forcing function, X(t) = 2t², the Laplace transform of this function is
Dead zone in an instrument must be less than __________ percent of the scale.
Dead zone in an instrument must be less than __________ percent of the scale.
A typical example of a physical system with under damped characteristic is a
A typical example of a physical system with under damped characteristic is a
Dead zone is the
Dead zone is the
Compositional analysis of __________ is done using mass spectrometer.
Compositional analysis of __________ is done using mass spectrometer.
Very low pressure is expressed in microns(μ), which is equal to __________ mm of Hg coloumn (absolute) at 0°C.
Very low pressure is expressed in microns(μ), which is equal to __________ mm of Hg coloumn (absolute) at 0°C.
Pressure of 0.01 psi (absolute) can be measured by __________ gauge.
Pressure of 0.01 psi (absolute) can be measured by __________ gauge.
All the thermocouples used for temperature measurement use dissimilar metal
All the thermocouples used for temperature measurement use dissimilar metal
Which of the following thermocouples is the most suitable for measuring a temperature of about 1600°C in an oxidizing atmosphere?
Which of the following thermocouples is the most suitable for measuring a temperature of about 1600°C in an oxidizing atmosphere?
The unit of 'time constant' of a system is the same as that of
The unit of 'time constant' of a system is the same as that of
Select the correct statement from the following.
Select the correct statement from the following.
Which of the following is not a speed measuring instrument?
Which of the following is not a speed measuring instrument?
Thermal well made of __________ gives the fastest speed of response, while measuring temperature by thermocouples.
Thermal well made of __________ gives the fastest speed of response, while measuring temperature by thermocouples.
In second order underdamped system,
In second order underdamped system,
Temperature measuring instruments are standardised mostly with __________ points of pure substances.
Temperature measuring instruments are standardised mostly with __________ points of pure substances.
Instrumentation in a plant offers the advantage of
Instrumentation in a plant offers the advantage of
Process degree of freedom indicates __________ number of controllers to be used.
Process degree of freedom indicates __________ number of controllers to be used.
Dilatometer is used to measure
Dilatometer is used to measure
Cascade control means
Cascade control means
A non-linear chemical system is exemplified by a/an
A non-linear chemical system is exemplified by a/an
__________ temperature scale assigns 0° to the 'ice point' and 80° to the 'steam point'.
__________ temperature scale assigns 0° to the 'ice point' and 80° to the 'steam point'.
A control system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at the crossover frequency. This is __________ criterion.
A control system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at the crossover frequency. This is __________ criterion.
Bimetal strips are not used in
Bimetal strips are not used in
Which of the following is not classified as a thermo electric pyrometer?
Which of the following is not classified as a thermo electric pyrometer?
Thermal wells used in temperature measurements should have
Thermal wells used in temperature measurements should have
Zirconia probe is used for the continuous measurment of __________ flue gases going out of the furnace.
Zirconia probe is used for the continuous measurment of __________ flue gases going out of the furnace.
A negative gain margin expressed in decibels means a/an __________ system.
A negative gain margin expressed in decibels means a/an __________ system.
Flow rate measurement of hostile acids and alkalis can be most suitably done by a/an
Flow rate measurement of hostile acids and alkalis can be most suitably done by a/an
A control system has the following transfer function F(s) = (s - 1)(s + 1)/s(s - 2)(s + 4)
The initial value of the corresponding time function is
A control system has the following transfer function F(s) = (s - 1)(s + 1)/s(s - 2)(s + 4)
The initial value of the corresponding time function is
The deflection in diaphragm (which is used as pressure sensor in pneumatic and electronic instruments) is dependent on the metal thickness, its diameter (d) and shape & number of corrugations. Its deflection is proportional to
The deflection in diaphragm (which is used as pressure sensor in pneumatic and electronic instruments) is dependent on the metal thickness, its diameter (d) and shape & number of corrugations. Its deflection is proportional to
Nitrogen gas constant volume thermometer is suitable for measuring a temperature of __________ °C.
Nitrogen gas constant volume thermometer is suitable for measuring a temperature of __________ °C.
Resistance of a gas in a vessel is given by (where, P = pressure, V = volume of the vessel, n = no. of moles of the gas, R = gas constant)
Resistance of a gas in a vessel is given by (where, P = pressure, V = volume of the vessel, n = no. of moles of the gas, R = gas constant)
Which of the following filled system expansion thermometers has the lowest positive temperature measurement capability?
Which of the following filled system expansion thermometers has the lowest positive temperature measurement capability?
What is the Laplace transform of impulse input having magnitude 'X' ?
What is the Laplace transform of impulse input having magnitude 'X' ?
Humidity of air can be determined by a
Humidity of air can be determined by a
Bode stability method uses __________ loop transfer function.
Bode stability method uses __________ loop transfer function.
Silver point temperature is __________ °C.
Silver point temperature is __________ °C.
A stable system is the one
A stable system is the one
Which of the following is the dynamic characteristics of an instrument?
Which of the following is the dynamic characteristics of an instrument?
The second order system with the transfer function 4/(S² + 2S + 4) has a damping ratio of
The second order system with the transfer function 4/(S² + 2S + 4) has a damping ratio of
Phase lag of the frequency response of a second order system to a sinusoidal forcing function
Phase lag of the frequency response of a second order system to a sinusoidal forcing function
Response of a linear control system for a change in set point is called
Response of a linear control system for a change in set point is called
__________ controller has the maximum stabilising time.
__________ controller has the maximum stabilising time.
Transfer function of transportation lag is
Transfer function of transportation lag is
Small furnace draught is accurately measured by an inclined tube manometer, in which the manometric liquid used most commonly is
Small furnace draught is accurately measured by an inclined tube manometer, in which the manometric liquid used most commonly is
Measurement of pressure in ammonia reactor is done by
Measurement of pressure in ammonia reactor is done by
Thermodynamic celcius scale of temperature measurement is
Thermodynamic celcius scale of temperature measurement is
Helium gas constant volume thermometer is suitable for the measurement of a temperature of __________ °C.
Helium gas constant volume thermometer is suitable for the measurement of a temperature of __________ °C.
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 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
Bode diagram is a plot of
Bode diagram is a plot of
Working principle of mercury in glass thermometer is based on the __________ of mercury with increase in temperature.
Working principle of mercury in glass thermometer is based on the __________ of mercury with increase in temperature.
Bode diagram are generated from output response of the system subjected to which of the following input?
Bode diagram are generated from output response of the system subjected to which of the following input?
Strain gage pressure transducers are used to measure __________ pressures.
Strain gage pressure transducers are used to measure __________ pressures.
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
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
Temperature measurement by optical pyrometer is done above __________ point, which is 1063°C.
Temperature measurement by optical pyrometer is done above __________ point, which is 1063°C.
Flow rate through an orifice is __________ the pressure differential.
Flow rate through an orifice is __________ the pressure differential.
Turbine flow meters are suitable for
Turbine flow meters are suitable for
The open loop transfer function of a control system is KR/(1 + TS) . This represents
The open loop transfer function of a control system is KR/(1 + TS) . This represents
Liquid flow rate in a small channel is best measured by a/an
Liquid flow rate in a small channel is best measured by a/an
A bolometer is
A bolometer is
Which of the following relates the absorption & evolution of heat at the junctions of a thermocouple to the current flow in the circuit?
Which of the following relates the absorption & evolution of heat at the junctions of a thermocouple to the current flow in the circuit?
What is the Laplace transform of sin t ?
What is the Laplace transform of sin t ?
Operating range of a temperature measuring instrument is 800 to 1600°C. It could be a/an __________ pyrometer.
Operating range of a temperature measuring instrument is 800 to 1600°C. It could be a/an __________ pyrometer.
Nickel percentage in invar which is an iron-nickel alloy, and is used as a thermocouple material is
Nickel percentage in invar which is an iron-nickel alloy, and is used as a thermocouple material is
Out of the following temperature measuring instruments, the measurement accuracy will be minimum for the
Out of the following temperature measuring instruments, the measurement accuracy will be minimum for the
In a single tank system, the transfer function of __________ to inlet flow rate is 1/TS+1.
In a single tank system, the transfer function of __________ to inlet flow rate is 1/TS+1.
The inverse Laplace transform of the function f(s) = 1/S(1 + S) is
The inverse Laplace transform of the function f(s) = 1/S(1 + S) is
Normal mercury thermometer can be used to measure a temperature of about 300°C. However, its maximum temperature measurement range can be increased upto about 500°C by
Normal mercury thermometer can be used to measure a temperature of about 300°C. However, its maximum temperature measurement range can be increased upto about 500°C by
A non-linear system will have __________ steady state values.
A non-linear system will have __________ steady state values.
Thermal conductivity measurement is used for the determination of
Thermal conductivity measurement is used for the determination of
Specific conductance is defined as the reciprocal of resistance in ohms of 1c.c. of liquid at a specified temperature. Its value for distilled water is about __________ micro mho/cm³.
Specific conductance is defined as the reciprocal of resistance in ohms of 1c.c. of liquid at a specified temperature. Its value for distilled water is about __________ micro mho/cm³.
Dome temperature of blast furnace stove is most accurately measured by a
Dome temperature of blast furnace stove is most accurately measured by a
Radiation thermometer can not measure the temperature
Radiation thermometer can not measure the temperature
Liquid argon level in a pressurised storage tank (at 3 kg/cm² ) is measured by a/an
Liquid argon level in a pressurised storage tank (at 3 kg/cm² ) is measured by a/an
A proportional controller with a gain of Kc is used to control a first order process. The offset will increase, if
A proportional controller with a gain of Kc is used to control a first order process. The offset will increase, if
__________ are analysed using a polarograph.
__________ are analysed using a polarograph.
Which of the following filled system expansion thermometer has the capability to measure the lowest temperature?
Which of the following filled system expansion thermometer has the capability to measure the lowest temperature?
Conversion formula for converting amplitude ratio (AR) into decibels is
Conversion formula for converting amplitude ratio (AR) into decibels is
A magnetic flowmeter is
A magnetic flowmeter is
Which of the systems having following transfer functions is stable?
Which of the systems having following transfer functions is stable?
High temperature of around 2000°C of incandescent gas mantles is measured by a/an
High temperature of around 2000°C of incandescent gas mantles is measured by a/an
Bourdon tube is never made of
Bourdon tube is never made of
Which of the following shows maximum dip effect (indicating reverse direction of temperature change)?
Which of the following shows maximum dip effect (indicating reverse direction of temperature change)?
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).
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 measurement range of iron-constantan thermocouple is 0 to 870°C. It can be used to measure sub zero temperature, because at lower temperature
Temperature measurement range of iron-constantan thermocouple is 0 to 870°C. It can be used to measure sub zero temperature, because at lower temperature
The temperature of tempering oil baths maintained at 400°C during heat treatment of steel is measured by a/an __________ thermocouple.
The temperature of tempering oil baths maintained at 400°C during heat treatment of steel is measured by a/an __________ thermocouple.
Routh stability method uses __________ loop transfer function.
Routh stability method uses __________ loop transfer function.
Which of the following is not a mechanical pressure sensing element?
Which of the following is not a mechanical pressure sensing element?
The root locus plot of the roots of the characteristics equation of a closed loop system having the open loop transfer function K(s + 1)/2(2s + 1)(3s + 1) will have a definite number of loci for variation of K from 0 to ∞. The number of loci is
The root locus plot of the roots of the characteristics equation of a closed loop system having the open loop transfer function K(s + 1)/2(2s + 1)(3s + 1) will have a definite number of loci for variation of K from 0 to ∞. The number of loci is
Which of the following instruments is not used for measuring sub-zero (<0°) temperatures?
Which of the following instruments is not used for measuring sub-zero (<0°) temperatures?
Liquid column manometers are used for measuring the pressure __________ kgf/cm² .
Liquid column manometers are used for measuring the pressure __________ kgf/cm² .
Which of the following measurements can be made by the measurement of emf?
Which of the following measurements can be made by the measurement of emf?
Pressure of 0.0001 absolute psi can be measured by __________ gauge.
Pressure of 0.0001 absolute psi can be measured by __________ gauge.
Which of the following controllers has the least maximum deviation?
Which of the following controllers has the least maximum deviation?
Characteristic equation is the denominator of __________ loop transfer function.
Characteristic equation is the denominator of __________ loop transfer function.
In an exothermic chemical reactor, the manipulated variable is the flow rate of
In an exothermic chemical reactor, the manipulated variable is the flow rate of
Maximum differential pressure in liquid manometer is __________ psi.
Maximum differential pressure in liquid manometer is __________ psi.
Mcleoid gauge is used to measure the
Mcleoid gauge is used to measure the
