Beam balance is used for __________
1.Weight comparison
2.Pressure comparison
3. Density comparison
4.None of the mentioned
EEG signal range is ____
1.Less than 1µV
2.Between 1 and 10µV
3.Greater than 10µV
4.None of the mentioned
For a negative feedback system, A=3 and β=2 and output impedance without feedback are 100Ω. What will be its total output impedance?
1.14.3 Ω
2. 700 Ω
3.33.33 Ω
4.50 Ω
In electromagnetic balance system, horizontality is detected by _______
1.Photo electric cell
2.Direct vision
3. Galvanometer
4.Detector circuit
In PMMC device, torque and number of turns have _______
1. Inverse proportionality
2.Direct proportionality
3. Equality
4.Undetermined
In which of the following conditions, feedback gain (Af) become independent of forward gain (A)?
1. Aβ<<1
2. Aβ=1
3.Aβ>>1
4.Aβ=0
Inverse transducers are also known as _________
1.Open loop transducers
2.Closed loop transducers
3. Input transducers
4.Output transducers
Load cells are highly stable.
1.True
2.False
3.all of the above
4.None of the mentioned
PMMC devices are converters of ________
1.Voltage to force
2.Force to voltage
3.Force to force
4.Voltage to voltage
Water is non-manometric liquid.
1.True
2.False
3.all of the above
4.None of the mentioned
Which of the following is correct for load cell?
1.Force to electrical energy conversion
2.Electrical energy to force conversion
3.Force to force conversion
4.None of the mentioned
Which of the following is suitable for geomechanical measurement?
1.Vibrating wire load cell
2.Strain gauge load cell
3. Piezo electric load cell
4.All of the mentioned
A system with feedback loop doesn’t have _______
1. Less stability
2.High linearity
3.Zero-order operation
4.All of the mentioned
As specific gravity increases, the evaporation rate of manometric liquid decreases.
1. True
2.False
3.all of the above
4.None of the mentioned
Atmospheric pressure can be expressed in __________
1.N
2. N/m
3. N/m2
4.None of the mentioned
Band width of servo operated manometers are limited to ________
1.5 Hz
2.5 KHz
3.5 MHz
4. 5 GHz
By conversion, 1 bar= _________ N/m2.
1.104
2.105
3.106
4.107
Difference between input signal and feedback signal is known as ______
1.Feedback factor
2.Error signal
3.Output signal
4.Input signal
Error signal in positive feedback system will be ____________ input signal.
1.Greater than
2.Lower than
3.Equal to
4.Negative of
Ground isolation in bioelectric measurement is not important.
1. True
2. False
3.all of the above
4.None of the mentioned
Hot wire anemometer can be used to measure ________
1.Flow rate of non-conducting liquid
2.Flow rate of conducting liquid
3.Liquid level measurement
4.pH of liquid
Hydraulic cells are preferable since _________
1.Can be used up to high pressure
2.Faster indication
3.Used for measuring high weights
4.All of the mentioned
In a feedback gain equation, what does the term β stands for?
1.Feedback gain
2.Forward gain
3.Open loop gain
4.Closed loop gain
In a PMMC device what change will happen to torque, if flux density increased?
1. Increases
2.Decreases
3. Remain constant
4.None of the mentioned
In a pneumatic balance system, restoring is done by _________
1. PMMC device
2.Bellows
3.Amplifier
4.Demodulator
In balance system gain of amplifier is ________
1.Very low
2. Very high
3.Unity
4.Selected according to weight
Input impedance can be ___ on application of negative feedback.
1. Increased
2.Decreased
3.Halved
4.Maintained constant
Input impedance of a system is 50 Ω, for the system to be negative feedback, which of the following can be its input impedance without feedback?
1.50 Ω
2.60 Ω
3.40 Ω
4. 100 Ω
Input transducers and inverse transducers are the same.
1.True
2. False
3.all of the above
4.None of the mentioned
Inverse transducer is system which converts _________
1.Electrical quantity to non-electrical quantity
2.Non-electrical quantity to electrical quantity
3.Electrical quantity to electrical quantity itself
4.Non- electrical quantity to non-electrical quantity itself
Manometers are generally used to measure ___________
1. Pressure
2.Voltage
3.Temperature
4.Humidity
Null position is attained when _________
1.Two weight becomes equal
2.One becomes double of other
3.One becomes zero
4.No null position attained
Pneumatic load cells are suitable for measuring ________
1.Very low pressure
2.Very high pressure
3. Intermediate range of pressure
4.All of the mentioned
Pressure output and area of diaphragm in pneumatic cell is related by ___________
1.Direct proportionality
2.Inverse proportionality
3.Equal
4.No relation
Resistance of glass electrode will be _____
1.Very low
2.Very high
3.Zero
4. Infinity
Tip of indicator electrode will be ______
1.Porous plug
2.Semipermeable membrane
3. Ion sensitive surface
4.Rigid glass
Torque of PMMC device is proportional to _______
1. Mass
2.Change in two masses
3.Balancing time
4.None of the mentioned
Voltage gain improves on the application of negative feedback.
1.True
2. False
3.all of the above
4.None of the mentioned
Which of the following can be used with highly dynamic force?
1.Piezo-electric load cell
2.Strain gauge load cell
3.All of the mentioned
4.None of the mentioned
Which of the following cannot act as inverse transducer?
1.Quartz
2.Barium titanate
3.Lead zirconate
4.Cadmium
Which of the following change has been happened to output impedance in the negative feedback system?
1.Increases
2.Decreases
3.No change
4.Negative
Which of the following has a low evaporation rate than water?
1.Mercury
2.Transformer oil
3.Tetrabromoethane
4.All of the mentioned
Which of the following is an inverse transducer _______
1. Piezoelectric transducer
2.LVDT
3.Load cell
4.Bourdon tube
Which of the following is the lowest unit for pressure?
1.Bar
2.Micron
3. Torr
4.Microbar
Which of the following materials can be used in high pressure manometer tube?
1. Glass
2.Stainless steel
3.Transparent plastic tube
4.None of the mentioned
Which of the following may be a cause for ringing in pneumatic load cell?
1.High load
2. Low load
3.Abrupt load change
4.No load
Which of the following represents complete expression for a closed loop system?
1.Aβ
2. A/ Aβ
3.A/ (1+Aβ)
4. 1/ (1+Aβ)
Which of the following represents pH of acidic medium?
1. Less than 7
2.Greater than 7
3. 0
4.7
Which of the following represents pressure exerted by a column of mercury of 1 mm?
1.Micron
2. Torr
3.Microbar
4.Bar
Which of the following represents torque produced in a PMMC device?
1.BAI0
2.BNI0
3.BANI0
4.BA2NI0