Analytical instruments MCQ Quiz Hub

1. In 741 IC, pin number 4 is represented by ______
Offset null
Positive input
Negative input
Negative supply

2. Which of the following cannot be treated as a requirement of the instrumentation amplifier?
Low drift
Low input impedance
High linearity
High CMRR

3. Amplifier with power supply and output circuits galvanically isolated are called ______
Differential amplifier
Isolation amplifier
Inverting amplifier
None of the mentioned

4. Voltage follower is also known as ______
Unity gain amplifier
Differential amplifier
Comparator
None of the mentioned

5. Which configuration of op-amp is used for filter circuit?
Differential
Non-inverting
Inverting
None of the mentioned

6. Amplification of low level signal can be done using_______
Electrometer amplifier
Difference amplifier
Inverting amplifier
Non inverting amplifier

7. For an ideal op-amp, zero input results in zero output.
True
False
all of the above
None of the mentioned

8. Phase difference between two voltages at frequencies above 10Hz can be measured using _____
CRO
Voltmeter
X-Y plotter
Multi meter

9. What is the operating range of X-Y plotter?
Below 5Hz
Above 10Hz
Above 1 KHz
Very high frequency

10. 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).
(360T0) ⁄ t0
(180 T0) ⁄ t0
(360 t0) ⁄ T0
(180 t0) ⁄ T0

11. What is the use of flip-flop in electronic phase meters?
To provide a delay
To provide stability
To save data for particular time duration
To produce rectangular pulse

12. Phase-Sensitive detectors are used for measuring phase of _______
Sinusoidal signals only
Non periodic signals only
Periodic signals only
Both periodic and non-periodic signals

13. Rejection capability of Phase sensitive detector is depended on the averaging time of smoothing filter.
True
False
all of the above
None of the mentioned

14. For what purpose, FET’s are included in phase sensitive detectors?
As SPDT switches, for working with very high frequency signals
As SPDT switches, for working with very low frequency signals
As SPST switches, for working with very high frequency signals
As SPST switches, for working with very low frequency signals

15. Which of the following relation is correct for phase angle and reactive power?
Reactive power = apparent power ∗ sin θ
Reactive power = apparent power ⁄ sin θ
Reactive power = Real power ∗ sin θ
Reactive power = Real power ⁄ sin θ

16. Which of the following is the expression of power factor?
cos θ
sin θ
tan θ
sec θ

17. What is the relation for phase angle (in degree) of a signal with time delay Δt and frequency f?
3600∗f.∗ Δt
1800∗f∗ Δt
3600 ⁄ (f∗ Δt)
1800 ⁄ (f∗ Δt)

18. Which of the following cannot be used as a unit for frequency?
Hz
BPM
RPM
S

19. Which of the following represents the correct relationship between frequency and angular frequency?
ω=2πf
ω=πf
f=2πω
f=πω

20. What will be the frequency of a system in which 35 events occur in 7 seconds?
7Hz
35Hz
5Hz
10Hz

21. Which of the following device can be used for measurement of frequency?
Voltmeter
Ammeter
Stroboscope
None of the mentioned

22. All waves in electromagnetic spectrum has the same speed in vacuum.
True
False
all of the above
None of the mentioned

23. Which of the following frequency range represents an audible frequency range of humans?
Below 20Hz
Between 20Hz and 20 KHz
Above 20 KHz
All of the Mentioned

24. Which of the following is the correct relationship between speed of light in vacuum and frequency of light?
c=fλ
c=f
λ=cf
c=λ2

25. In a dispersive medium, speed of light depends on frequency.
True
False
all of the above
None of the mentioned

26. Which of the following range represents frequency range of rainbow colors?
Below 4×1014Hz
Between 4×1014Hz and 8×1014Hz
Above 8×1014Hz
Between 0Hz and 8×1014Hz

27. What will be the frequency of the signal A sin (4πt+ɸ)?
2Hz
0.5Hz
2πHz
4πHz

28. Phase difference between two voltages at frequencies above 10Hz can be measured using _________
CRO
Voltmeter
X-Y plotter
Multi meter

29. In a time interval measuring device, two pulses are used _________
To produce triangular wave
To start and stop gate circuit
To produce sinusoidal signal
None of the mentioned

30. Start and stop pulses are produced by ______
Gate circuit
Time discriminators
Oscillators
None of the mentioned

31. TDC devices are used for ______
Indicating frequency of signal
Indicating time delay in analog format
Indicating time delay in digital format
Indicating voltage level

32. Measuring range is not an important parameter in TIM.
True
False
all of the above
None of the mentioned

33. When interpolation techniques are used?
When interpolation techniques are used?
For high resolution of measurement
For high range of measurement and high resolution of the measurement is required
Not the mentioned

34. What is the use of PWM technology?
To amplify output voltage
To reduce output voltage
For controlling supply voltage
For measuring voltage

35. What do you mean by duty cycle?
Ratio of on time and total time period
Ratio of off time and total time period
On time
Off time

36. Time require by the signal to reach 63% of amplitude is known as ______
Duty cycle
Time delay
Time constant
On time

37. What is the use of a gate circuit in TIM?
To produce sinusoidal signal
To produce pulse signal
To on and off input signal
None of the mentioned

38. TDC and TIM are used for the same application.
True
False
all of the above
None of the mentioned

39. Which of the given statement is true for a zero-order system?
Varying transfer function with time
Constant transfer function
Transfer function = 1/S
Transfer function = 1/s2

40. Which of the given factor determines the order of a system?
Maximum power of ‘S’ in the characteristic equation
Minimum power of ‘S’ in the characteristic equation
Value of constant value
None of the mentioned

41. Transfer function of a system is given by G(S) = b0 ⁄ a1S+a0. What will be the static sensitivity of system?
b0 ⁄ a0
b0 ⁄ a1
a0 ⁄ b0
a1 ⁄ b0

42. What will be the time constant for a system represented by transfer function G(S) = 5/(3S+2)?
3
2.5
1.5
2

43. What will be the damping ratio of a system with transfer function G(S) = 5/(3S2+2S+3)?
1.5
0.5
0.33
2

44. Which of the following represent condition for an over-damped system?
Damping ratio<0
Damping ratio=0
Damping ratio=0.5
Damping ratio>1

45. Which of the following represents a system with transfer function G(S) = 5/(3S2+8S+3) ?
Over damped system
Un-damped system
Under damped system
None of the mentioned

46. For a ramp input in second order system, which of the following represents the correct relationship between natural frequency and steady state error?
Both are directly proportional
Both are inversely proportional
Both are equal
None of the mentioned

47. What will be the static sensitivity of a system with transfer function G(S) = 4/(5S2+8S+2)?
0.5
2
4
4/5

48. Transfer function of a system with input y(t) = t2/2 is given by 1/S. What will be the obtained output?
6t3
t3/6
t3
t4

49. Electrical network made up of resistor and inductor is a _______
Passive network
Active network
Low pass filter
High pass filter

50. Resistor is a ______ element.
Zero order
First order
Second order
None of the mentioned