Electrodynamic vibration transducers are based on _______
1.Magnetostriction
2.Electromagnetic induction
3.Self inductance
4.None of the mentioned
In photo emissive transducers, electrons are attracted by ______
1. Cathode
2.Anode
3.Grid
4.Body
In vibrating tube gas transducer, Pressure difference across wall is varying.
1. True
2.False
3.all of the above
4.None of the mentioned
Which of the following is not an encoder?
1.Optical encoders
2.Magnetic encoders
3.Angular digital encoders
4.None of the mentioned
Which of the following represents the expression of output from electromechanical flow meter?
1.BDV
2.BV
3.BD
4.BD2V
Absolute encoders require data.
1.True
2. False
3.all of the above
4.None of the mentioned
Calomel electrode is made up of _______
1. Mercurous chloride
2. Mercurous sulphide
3.Potassium chloride
4.Potassium sulphide
Cold cathode ionization vacuum gauges are more accurate than hot cathode ionization vacuum gauges.
1.True
2.False
3.all of the above
4.None of the mentioned
Datums are used for ______
1. Obtaining digital output
2.Converting analog data to digital data
3. Storing data
4. Displaying output
Density of flowing liquid can be measured using________
1.Vibrating tube transducer
2. Vibrating cylinder transducer
3.Both vibrating tube and cylinder transducer
4.None of the mentioned
Electromechanical system can be used for measuring vibration.
1. True
2.False
3.all of the above
4.None of the mentioned
Force exerted by magnetic field in Hall Effect transducers is ________
1. Lorentz force
2.Hall Effect force
3.Magnetic force
4. Electric force
Glass electrode is a/an _______
1.Reference electrode
2.Indicator electrode
3. Calomel electrode
4.None of the mentioned
Hall Effect is clearly visible in _______
1.Pure conductors
2.Semiconductors
3.Super conductors
4.Metals
Hall Effect transducer can be used to measure ______
1.Magnetic field
2.Angular displacement
3.Linear displacement
4.All of the mentioned
Hall Effect transducers attain equilibrium instantaneously.
1.True
2.False
3.all of the above
4.None of the mentioned
In vibrating string transducer output frequency is depended on the length of spring by ________
1. Direct proportionality
2.Inverse proportionality
3.Equal
4.None of the mentioned
LDE is used for measuring __________
1.Linear acceleration
2.Angular acceleration
3. Linear displacement
4.Linear acceleration
LDR’s are also called ________
1. Photo voltaic cell
2. Photo resistive cell
3. Photo emissive cell
4.All of the mentioned
Photo resistive cells are _________
1.Active device
2.Passive device
3.Insulating device
4.None of the mentioned
Photo transistor is a three terminal device.
1. True
2.False
3.all of the above
4.None of the mentioned
Photoelectric devices are sensitive to all wavelength.
1.True
2.False
3.all of the above
4.None of the mentioned
Semiconductor layer using silicon and germanium is known as ______
1.Photo diodes
2.Photo junction diodes
3. Photo material
4.Photo sensitive materials
Two phase induction motor can be used as AC tachometers.
1.True
2.False
3.all of the above
4.None of the mentioned
VDP is used for measuring pressure _____
1.Less than 1 atmosphere
2.Between 1 and 100 atmosphere
3.Above 1000 atmosphere
4. All of the mentioned
Which of the following applications ionization chamber is used?
1.For detection of nuclear radiation
2.For better stability
3.For storing inert gas
4.For ionizing gas
Which of the following are nuclear radiations?
1. Beta
2.Alpha
3.Gamma
4.All of the mentioned
Which of the following are used to form photo transistors?
1.Two photo diodes
2.Three photo diodes
3.Normal diodes
4. None of the mentioned
Which of the following can be measured using tachometers?
1. Angular speed
2.Linear speed
3. Acceleration
4.Vibration
Which of the following can be used by NHE?
1.Reference electrode
2.Indicator electrode
3. Both reference and indicator electrode
4.None of the mentioned
Which of the following cannot be measured using ionization transducer?
1.Vacuum pressure
2.Gaseous pressure
3.Displacement
4.None of the mentioned
Which of the following conversion take place in the galvanic cell and electrolytic cell?
1.Chemical energy to electrical energy without power supply
2.Electrical energy to chemical energy without power supply
3.Mechanical energy to chemical energy without power supply
4.None of the mentioned
Which of the following electrode/s is/are used for measuring electrode potential?
1.Reference electrode
2.Indicator electrode
3.Both reference and indicator electrode
4.None of the mentioned
Which of the following has a helium nucleus?
1.Alpha particle
2.Beta particle
3. Gamma particle
4.All of the mentioned
Which of the following is a radioactive vacuum gauge?
1.Cold cathode gauge
2.Hot cathode gauge
3.Non ionization gauge
4.None of the mentioned
Which of the following is applicable for the electromagnetic flow meter?
1.It causes obstruction to flow
2.It doesn’t cause obstruction t flow
3.It cannot be used in slurries
4.None of the mentioned
Which of the following is correct for a digital transducer?
1.Measures digital quantity only
2.Gives digital output
3.Doesn’t measure analog input
4.None of the mentioned
Which of the following is correct for AC and DC tachometers?
1. Sensitivity if AC tachometer is very high
2.Sensitivity of DC tachometer is very high
3.Sensitivity of both are equal
4. None of the mentioned
Which of the following is correct for the ionization transducer?
1.Grid current decrease constantly
2.Grid current Increases constantly
3.Grid current is made constant
4.None of the mentioned
Which of the following is correct for the tachometer system?
1.First order system
2.Second order system
3.Third order system
4.Unpredictable
Which of the following is used for measuring emf between plates of transducers?
1.Low impedance voltmeter
2.High impedance voltmeter
3.Any voltmeter
4.None of the mentioned
Which of the following materials can be used as photoconductive transducer?
1. Selenium
2.Silicon
3.Germanium
4. All of the mentioned
Which of the following potential is applied to the grid?
1. +ve potential
2.–ve potential
3.Neutral potential
4.None of the mentioned
Which of the following quantities are insensitive to solid state semiconductor photoelectric transducers?
1. X ray
2.Gamma ray
3.Alpha and beta rays
4.None of the mentioned
Which of the following quantities are sensitive to electromechanical flow meters?
1.Viscosity
2.Density
3.Temperature
4.None of the mentioned
Which of the following represents a mass absorption coefficient?
1. Ratio of linear absorption coefficient to density
2.Product of absorption coefficient and density
3.Linear absorption coefficient
4.Product of linear absorption coefficient and mass
Which of the following represents correct expression for Lorentz force?
1. BeV
2.BV
3.eV
4. B
Which of the following represents the output of Hall Effect transducer?
1.Hall potential
2. Emf
3.Applied voltage
4.Lorentz Voltage
Why inert gas is used in photo electric transducers?
1.To increase efficiency
2.To increase sensitivity
3.To increase robustness
4.None of the mentioned
Why positive feedback is used in a pressure transducer?
1.To improve stability
2.To maintain stability constant
3.To maintain vibratory motion
4.None of the mentioned