laboursonline – MCQs, Mock Tests | Analytical instruments Analytical Instrumentation MCQ Question Set 24

Tip of indicator electrode will be ______

1. Porous plug
2. Semipermeable membrane
3. Ion sensitive surface
4. Rigid glass

✅ Correct Answer: 3

Resistance of glass electrode will be _____

1. Very low
2. Very high
3. Zero
4. Infinity

✅ Correct Answer: 2

Which of the following represents pH of acidic medium?

1. Less than 7
2. Greater than 7
3. 0
4. 7

✅ Correct Answer: 1

Ground isolation in bioelectric measurement is not important.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

EEG signal range is ____

1. Less than 1µV
2. Between 1 and 10µV
3. Greater than 10µV
4. None of the mentioned

✅ Correct Answer: 2

Difference between input signal and feedback signal is known as ______

1. Feedback factor
2. Error signal
3. Output signal
4. Input signal

✅ Correct Answer: 2

Error signal in positive feedback system will be ____________ input signal.

1. Greater than
2. Lower than
3. Equal to
4. Negative of

✅ Correct Answer: 1

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)

✅ Correct Answer: 3

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

✅ Correct Answer: 2

Voltage gain improves on the application of negative feedback.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

Input impedance can be ___ on application of negative feedback.

1. Increased
2. Decreased
3. Halved
4. Maintained constant

✅ Correct Answer: 1

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

✅ Correct Answer: 1

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

✅ Correct Answer: 3

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

✅ Correct Answer: 1

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

✅ Correct Answer: 3

Inverse transducers are also known as _________

1. Open loop transducers
2. Closed loop transducers
3. Input transducers
4. Output transducers

✅ Correct Answer: 4

A system with feedback loop doesn’t have _______

1. Less stability
2. High linearity
3. Zero-order operation
4. All of the mentioned

✅ Correct Answer: 1

Which of the following represents torque produced in a PMMC device?

1. BAI0
2. BNI0
3. BANI0
4. BA2NI0

✅ Correct Answer: 3

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

✅ Correct Answer: 1

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

✅ Correct Answer: 1

PMMC devices are converters of ________

1. Voltage to force
2. Force to voltage
3. Force to force
4. Voltage to voltage

✅ Correct Answer: 1

In PMMC device, torque and number of turns have _______

1. Inverse proportionality
2. Direct proportionality
3. Equality
4. Undetermined

✅ Correct Answer: 4

Which of the following is an inverse transducer _______

1. Piezoelectric transducer
2. LVDT
3. Load cell
4. Bourdon tube

✅ Correct Answer: 1

Input transducers and inverse transducers are the same.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

Which of the following cannot act as inverse transducer?

1. Quartz
2. Barium titanate
3. Lead zirconate
4. Cadmium

✅ Correct Answer: 4

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

✅ Correct Answer: 1

Beam balance is used for __________

1. Weight comparison
2. Pressure comparison
3. Density comparison
4. None of the mentioned

✅ Correct Answer: 1

In electromagnetic balance system, horizontality is detected by _______

1. Photo electric cell
2. Direct vision
3. Galvanometer
4. Detector circuit

✅ Correct Answer: 1

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

✅ Correct Answer: 1

In balance system gain of amplifier is ________

1. Very low
2. Very high
3. Unity
4. Selected according to weight

✅ Correct Answer: 2

Torque of PMMC device is proportional to _______

1. Mass
2. Change in two masses
3. Balancing time
4. None of the mentioned

✅ Correct Answer: 2

In a pneumatic balance system, restoring is done by _________

1. PMMC device
2. Bellows
3. Amplifier
4. Demodulator

✅ Correct Answer: 2

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

✅ Correct Answer: 2

Band width of servo operated manometers are limited to ________

1. 5 Hz
2. 5 KHz
3. 5 MHz
4. 5 GHz

✅ Correct Answer: 1

Manometers are generally used to measure ___________

1. Pressure
2. Voltage
3. Temperature
4. Humidity

✅ Correct Answer: 1

Atmospheric pressure can be expressed in __________

1. N
2. N/m
3. N/m2
4. None of the mentioned

✅ Correct Answer: 3

By conversion, 1 bar= _________ N/m2.

1. 104
2. 105
3. 106
4. 107

✅ Correct Answer: 2

Which of the following represents pressure exerted by a column of mercury of 1 mm?

1. Micron
2. Torr
3. Microbar
4. Bar

✅ Correct Answer: 2

Which of the following is the lowest unit for pressure?

1. Bar
2. Micron
3. Torr
4. Microbar

✅ Correct Answer: 2

Water is non-manometric liquid.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

Which of the following has a low evaporation rate than water?

1. Mercury
2. Transformer oil
3. Tetrabromoethane
4. All of the mentioned

✅ Correct Answer: 4

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

✅ Correct Answer: 2

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

✅ Correct Answer: 2

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

✅ Correct Answer: 4

Pressure output and area of diaphragm in pneumatic cell is related by ___________

1. Direct proportionality
2. Inverse proportionality
3. Equal
4. No relation

✅ Correct Answer: 2

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

✅ Correct Answer: 1

Load cells are highly stable.

1. True
2. False
3. all of the above
4. None of the mentioned

✅ Correct Answer: 2

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

✅ Correct Answer: 1

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

✅ Correct Answer: 1

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

✅ Correct Answer: 3