ainfoera.com – MCQs, Mock Tests | Analytical instruments Analytical Instrumentation MCQ Question Set 17

1 In 741 IC, pin number 4 is represented by ______

A Offset null B Positive input C Negative input D Negative supply

✅ Correct Answer: 4

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

A Low drift B Low input impedance C High linearity D High CMRR

✅ Correct Answer: 2

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

A Differential amplifier B Isolation amplifier C Inverting amplifier D None of the mentioned

✅ Correct Answer: 2

4 Voltage follower is also known as ______

A Unity gain amplifier B Differential amplifier C Comparator D None of the mentioned

✅ Correct Answer: 1

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

A Differential B Non-inverting C Inverting D None of the mentioned

✅ Correct Answer: 3

6 Amplification of low level signal can be done using_______

A Electrometer amplifier B Difference amplifier C Inverting amplifier D Non inverting amplifier

✅ Correct Answer: 1

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

A True B False C all of the above D None of the mentioned

✅ Correct Answer: 1

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

A CRO B Voltmeter C X-Y plotter D Multi meter

✅ Correct Answer: 1

9 What is the operating range of X-Y plotter?

A Below 5Hz B Above 10Hz C Above 1 KHz D Very high frequency

✅ Correct Answer: 1

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).

A (360T0) â„ t0 B (180 T0) â„ t0 C (360 t0) â„ T0 D (180 t0) â„ T0

✅ Correct Answer: 3

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

A To provide a delay B To provide stability C To save data for particular time duration D To produce rectangular pulse

✅ Correct Answer: 4

12 Phase-Sensitive detectors are used for measuring phase of _______

A Sinusoidal signals only B Non periodic signals only C Periodic signals only D Both periodic and non-periodic signals

✅ Correct Answer: 3

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

A True B False C all of the above D None of the mentioned

✅ Correct Answer: 1

14 For what purpose, FETâ€™s are included in phase sensitive detectors?

A As SPDT switches, for working with very high frequency signals B As SPDT switches, for working with very low frequency signals C As SPST switches, for working with very high frequency signals D As SPST switches, for working with very low frequency signals

✅ Correct Answer: 2

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

A Reactive power = apparent power âˆ— sin Î¸ B Reactive power = apparent power â„ sin Î¸ C Reactive power = Real power âˆ— sin Î¸ D Reactive power = Real power â„ sin Î¸

✅ Correct Answer: 1

16 Which of the following is the expression of power factor?

A cos Î¸ B sin Î¸ C tan Î¸ D sec Î¸

✅ Correct Answer: 1

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

A 3600âˆ—f.âˆ— Î”t B 1800âˆ—fâˆ— Î”t C 3600 â„ (fâˆ— Î”t) D 1800 â„ (fâˆ— Î”t)

✅ Correct Answer: 1

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

A Hz B BPM C RPM D S

✅ Correct Answer: 4

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

A Ï‰=2Ï€f B Ï‰=Ï€f C f=2Ï€Ï‰ D f=Ï€Ï‰

✅ Correct Answer: 1

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

A 7Hz B 35Hz C 5Hz D 10Hz

✅ Correct Answer: 3

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

A Voltmeter B Ammeter C Stroboscope D None of the mentioned

✅ Correct Answer: 3

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

A True B False C all of the above D None of the mentioned

✅ Correct Answer: 1

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

A Below 20Hz B Between 20Hz and 20 KHz C Above 20 KHz D All of the Mentioned

✅ Correct Answer: 2

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

A c=fÎ» B c=f C Î»=cf D c=Î»2

✅ Correct Answer: 1

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

A True B False C all of the above D None of the mentioned

✅ Correct Answer: 1

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

A Below 4Ã—1014Hz B Between 4Ã—1014Hz and 8Ã—1014Hz C Above 8Ã—1014Hz D Between 0Hz and 8Ã—1014Hz

✅ Correct Answer: 2

27 What will be the frequency of the signal A sin (4Ï€t+É¸)?

A 2Hz B 0.5Hz C 2Ï€Hz D 4Ï€Hz

✅ Correct Answer: 1

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

A CRO B Voltmeter C X-Y plotter D Multi meter

✅ Correct Answer: 1

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

A To produce triangular wave B To start and stop gate circuit C To produce sinusoidal signal D None of the mentioned

✅ Correct Answer: 2

30 Start and stop pulses are produced by ______

A Gate circuit B Time discriminators C Oscillators D None of the mentioned

✅ Correct Answer: 2

31 TDC devices are used for ______

A Indicating frequency of signal B Indicating time delay in analog format C Indicating time delay in digital format D Indicating voltage level

✅ Correct Answer: 3

32 Measuring range is not an important parameter in TIM.

A True B False C all of the above D None of the mentioned

✅ Correct Answer: 1

33 When interpolation techniques are used?

A When interpolation techniques are used? B For high resolution of measurement C For high range of measurement and high resolution of the measurement is required D Not the mentioned

✅ Correct Answer: 3

34 What is the use of PWM technology?

A To amplify output voltage B To reduce output voltage C For controlling supply voltage D For measuring voltage

✅ Correct Answer: 3

35 What do you mean by duty cycle?

A Ratio of on time and total time period B Ratio of off time and total time period C On time D Off time

✅ Correct Answer: 1

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

A Duty cycle B Time delay C Time constant D On time

✅ Correct Answer: 3

37 What is the use of a gate circuit in TIM?

A To produce sinusoidal signal B To produce pulse signal C To on and off input signal D None of the mentioned

✅ Correct Answer: 3

38 TDC and TIM are used for the same application.

A True B False C all of the above D None of the mentioned

✅ Correct Answer: 1

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

A Varying transfer function with time B Constant transfer function C Transfer function = 1/S D Transfer function = 1/s2

✅ Correct Answer: 2

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

A Maximum power of â€˜Sâ€™ in the characteristic equation B Minimum power of â€˜Sâ€™ in the characteristic equation C Value of constant value D None of the mentioned

✅ Correct Answer: 1

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

A b0 â„ a0 B b0 â„ a1 C a0 â„ b0 D a1 â„ b0

✅ Correct Answer: 1

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

A 3 B 2.5 C 1.5 D 2

✅ Correct Answer: 3

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

A 1.5 B 0.5 C 0.33 D 2

✅ Correct Answer: 3

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

A Damping ratio<0 B Damping ratio=0 C Damping ratio=0.5 D Damping ratio>1

✅ Correct Answer: 4

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

A Over damped system B Un-damped system C Under damped system D None of the mentioned

✅ Correct Answer: 1

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

A Both are directly proportional B Both are inversely proportional C Both are equal D None of the mentioned

✅ Correct Answer: 2

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

A 0.5 B 2 C 4 D 4/5

✅ Correct Answer: 2

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

A 6t3 B t3/6 C t3 D t4

✅ Correct Answer: 2

49 Electrical network made up of resistor and inductor is a _______

A Passive network B Active network C Low pass filter D High pass filter

✅ Correct Answer: 1

50 Resistor is a ______ element.

A Zero order B First order C Second order D None of the mentioned

✅ Correct Answer: 1

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Analytical Instrumentation MCQ Question Set 17