R4RIN – MCQs, Mock Tests | Analytical instruments Analytical Instrumentation MCQ Question Set 17

In 741 IC, pin number 4 is represented by ______

1. Offset null
2. Positive input
3. Negative input
4. Negative supply

✅ Correct Answer: 4

Which of the following cannot be treated as a requirement of the instrumentation amplifier?

1. Low drift
2. Low input impedance
3. High linearity
4. High CMRR

✅ Correct Answer: 2

Amplifier with power supply and output circuits galvanically isolated are called ______

1. Differential amplifier
2. Isolation amplifier
3. Inverting amplifier
4. None of the mentioned

✅ Correct Answer: 2

Voltage follower is also known as ______

1. Unity gain amplifier
2. Differential amplifier
3. Comparator
4. None of the mentioned

✅ Correct Answer: 1

Which configuration of op-amp is used for filter circuit?

1. Differential
2. Non-inverting
3. Inverting
4. None of the mentioned

✅ Correct Answer: 3

Amplification of low level signal can be done using_______

1. Electrometer amplifier
2. Difference amplifier
3. Inverting amplifier
4. Non inverting amplifier

✅ Correct Answer: 1

For an ideal op-amp, zero input results in zero output.

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

✅ Correct Answer: 1

Phase difference between two voltages at frequencies above 10Hz can be measured using _____

1. CRO
2. Voltmeter
3. X-Y plotter
4. Multi meter

✅ Correct Answer: 1

What is the operating range of X-Y plotter?

1. Below 5Hz
2. Above 10Hz
3. Above 1 KHz
4. Very high frequency

✅ Correct Answer: 1

What is the expression for phase angle using X-Y plotter? (Assume t0 be time interval between zero crossing of signals and T be time period of signals).

1. (360T0) ⁄ t0
2. (180 T0) ⁄ t0
3. (360 t0) ⁄ T0
4. (180 t0) ⁄ T0

✅ Correct Answer: 3

What is the use of flip-flop in electronic phase meters?

1. To provide a delay
2. To provide stability
3. To save data for particular time duration
4. To produce rectangular pulse

✅ Correct Answer: 4

Phase-Sensitive detectors are used for measuring phase of _______

1. Sinusoidal signals only
2. Non periodic signals only
3. Periodic signals only
4. Both periodic and non-periodic signals

✅ Correct Answer: 3

Rejection capability of Phase sensitive detector is depended on the averaging time of smoothing filter.

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

✅ Correct Answer: 1

For what purpose, FET’s are included in phase sensitive detectors?

1. As SPDT switches, for working with very high frequency signals
2. As SPDT switches, for working with very low frequency signals
3. As SPST switches, for working with very high frequency signals
4. As SPST switches, for working with very low frequency signals

✅ Correct Answer: 2

Which of the following relation is correct for phase angle and reactive power?

1. Reactive power = apparent power ∗ sin θ
2. Reactive power = apparent power ⁄ sin θ
3. Reactive power = Real power ∗ sin θ
4. Reactive power = Real power ⁄ sin θ

✅ Correct Answer: 1

Which of the following is the expression of power factor?

1. cos θ
2. sin θ
3. tan θ
4. sec θ

✅ Correct Answer: 1

What is the relation for phase angle (in degree) of a signal with time delay Δt and frequency f?

1. 3600∗f.∗ Δt
2. 1800∗f∗ Δt
3. 3600 ⁄ (f∗ Δt)
4. 1800 ⁄ (f∗ Δt)

✅ Correct Answer: 1

Which of the following cannot be used as a unit for frequency?

1. Hz
2. BPM
3. RPM
4. S

✅ Correct Answer: 4

Which of the following represents the correct relationship between frequency and angular frequency?

1. ω=2πf
2. ω=πf
3. f=2πω
4. f=πω

✅ Correct Answer: 1

What will be the frequency of a system in which 35 events occur in 7 seconds?

1. 7Hz
2. 35Hz
3. 5Hz
4. 10Hz

✅ Correct Answer: 3

Which of the following device can be used for measurement of frequency?

1. Voltmeter
2. Ammeter
3. Stroboscope
4. None of the mentioned

✅ Correct Answer: 3

All waves in electromagnetic spectrum has the same speed in vacuum.

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

✅ Correct Answer: 1

Which of the following frequency range represents an audible frequency range of humans?

1. Below 20Hz
2. Between 20Hz and 20 KHz
3. Above 20 KHz
4. All of the Mentioned

✅ Correct Answer: 2

Which of the following is the correct relationship between speed of light in vacuum and frequency of light?

1. c=fλ
2. c=f
3. λ=cf
4. c=λ2

✅ Correct Answer: 1

In a dispersive medium, speed of light depends on frequency.

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

✅ Correct Answer: 1

Which of the following range represents frequency range of rainbow colors?

1. Below 4×1014Hz
2. Between 4×1014Hz and 8×1014Hz
3. Above 8×1014Hz
4. Between 0Hz and 8×1014Hz

✅ Correct Answer: 2

What will be the frequency of the signal A sin (4πt+ɸ)?

1. 2Hz
2. 0.5Hz
3. 2πHz
4. 4πHz

✅ Correct Answer: 1

Phase difference between two voltages at frequencies above 10Hz can be measured using _________

1. CRO
2. Voltmeter
3. X-Y plotter
4. Multi meter

✅ Correct Answer: 1

In a time interval measuring device, two pulses are used _________

1. To produce triangular wave
2. To start and stop gate circuit
3. To produce sinusoidal signal
4. None of the mentioned

✅ Correct Answer: 2

Start and stop pulses are produced by ______

1. Gate circuit
2. Time discriminators
3. Oscillators
4. None of the mentioned

✅ Correct Answer: 2

TDC devices are used for ______

1. Indicating frequency of signal
2. Indicating time delay in analog format
3. Indicating time delay in digital format
4. Indicating voltage level

✅ Correct Answer: 3

Measuring range is not an important parameter in TIM.

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

✅ Correct Answer: 1

When interpolation techniques are used?

1. When interpolation techniques are used?
2. For high resolution of measurement
3. For high range of measurement and high resolution of the measurement is required
4. Not the mentioned

✅ Correct Answer: 3

What is the use of PWM technology?

1. To amplify output voltage
2. To reduce output voltage
3. For controlling supply voltage
4. For measuring voltage

✅ Correct Answer: 3

What do you mean by duty cycle?

1. Ratio of on time and total time period
2. Ratio of off time and total time period
3. On time
4. Off time

✅ Correct Answer: 1

Time require by the signal to reach 63% of amplitude is known as ______

1. Duty cycle
2. Time delay
3. Time constant
4. On time

✅ Correct Answer: 3

What is the use of a gate circuit in TIM?

1. To produce sinusoidal signal
2. To produce pulse signal
3. To on and off input signal
4. None of the mentioned

✅ Correct Answer: 3

TDC and TIM are used for the same application.

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

✅ Correct Answer: 1

Which of the given statement is true for a zero-order system?

1. Varying transfer function with time
2. Constant transfer function
3. Transfer function = 1/S
4. Transfer function = 1/s2

✅ Correct Answer: 2

Which of the given factor determines the order of a system?

1. Maximum power of ‘S’ in the characteristic equation
2. Minimum power of ‘S’ in the characteristic equation
3. Value of constant value
4. None of the mentioned

✅ Correct Answer: 1

Transfer function of a system is given by G(S) = b0 ⁄ a1S+a0. What will be the static sensitivity of system?

1. b0 ⁄ a0
2. b0 ⁄ a1
3. a0 ⁄ b0
4. a1 ⁄ b0

✅ Correct Answer: 1

What will be the time constant for a system represented by transfer function G(S) = 5/(3S+2)?

1. 3
2. 2.5
3. 1.5
4. 2

✅ Correct Answer: 3

What will be the damping ratio of a system with transfer function G(S) = 5/(3S2+2S+3)?

1. 1.5
2. 0.5
3. 0.33
4. 2

✅ Correct Answer: 3

Which of the following represent condition for an over-damped system?

1. Damping ratio<0
2. Damping ratio=0
3. Damping ratio=0.5
4. Damping ratio>1

✅ Correct Answer: 4

Which of the following represents a system with transfer function G(S) = 5/(3S2+8S+3) ?

1. Over damped system
2. Un-damped system
3. Under damped system
4. None of the mentioned

✅ Correct Answer: 1

For a ramp input in second order system, which of the following represents the correct relationship between natural frequency and steady state error?

1. Both are directly proportional
2. Both are inversely proportional
3. Both are equal
4. None of the mentioned

✅ Correct Answer: 2

What will be the static sensitivity of a system with transfer function G(S) = 4/(5S2+8S+2)?

1. 0.5
2. 2
3. 4
4. 4/5

✅ Correct Answer: 2

Transfer function of a system with input y(t) = t2/2 is given by 1/S. What will be the obtained output?

1. 6t3
2. t3/6
3. t3
4. t4

✅ Correct Answer: 2

Electrical network made up of resistor and inductor is a _______

1. Passive network
2. Active network
3. Low pass filter
4. High pass filter

✅ Correct Answer: 1

Resistor is a ______ element.

1. Zero order
2. First order
3. Second order
4. None of the mentioned

✅ Correct Answer: 1