Instrumentation Engineering MCQs
Instrumentation Engineering MCQs
Answer these 30 Instrumentation Engineering MCQs and assess your grip on the subject of Instrumentation Engineering.
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What would be the simplified form of the function given below using the Karnaugh map?
f=∑(0,3,7,11,14) + d∑(5,12,15)
(Where
A.
Ä€.CÂ
B.
A.B
C.
C.D + A.BÂ Â
D.
C.D
What would be the decimal number of the following excess-3 code?
Excess-3 code = 1010 0101
A.
27Â
B.
52Â
C.
67Â
D.
72Â
This question is based upon the figure shown below
In the above figure, initial value of the base current is 30 µA and the beta rating of the component is 300. If the base current (IB) increases from 30 µA to 60 µA, then what would be the change in the value of the collector current(Ic)?
A.
6 mA
B.
7 mAÂ Â
C.
8 mAÂ
D.
9 mAÂ
A light dependent resistor has a resistance of 200 ohms at a certain light level. It can only handle a current of 20 milliamps before it risks heating up.
If the LDR (Light Dependent Resister) is connected to a 40V supply, what would be the value of resistor we place in series?
A.
1600 ohmsÂ
B.
1650 ohms Â
C.
1700 ohmsÂ
D.
1800 ohms
Which of the following statements is/are false?
(1) Fuzzy logic follows the principle of Aristotle and Buddha.
(2) The AND, OR, and NOT logical operators of Boolean logic are called Zadeh operators in Fuzzy logic.
A.
(1) only
B.
(2) only
C.
Both (1) and (2)
D.
None of the above
6: If the refractive indices for the core and cladding of an optical fibre are 1.7 and 1.5 respectively. What would be the acceptance angle of the optical fibre?
A. 53.1 degree
B. 49.1 degree
C. 33.1 degree
D. 38.1 degree
State True/ False:
The system y(t) = 4x2(t) is time invariant.
A.
TrueÂ
B.
False
8: If a sinusoidal wave of angular frequency 1400 rad/s applied to the Y-Y plates of a Cathode Ray Oscilloscope produces six horizontal tangent points and five vertical tangent points, then what would be the frequency of the sinusoidal waveform applied to the X-X plates?
A. 1680 rad/s
B. 1750 rad/s
C. 1820 rad/s
D. 1875 rad/s
9: The meter constant of 6A, 220V dc watt-hour meter is 3365 revolutions per kWh. What would be the number of revolutions in one minute?
A. 70.03 r.p.m
B. 64.03 r.p.m
C. 69.03 r.p.m
D. 74.03 r.p.m
This question is based upon the figure shown below
A four-arm a.c. bridge network is shown in the figure above whose arms PQ has a non-reactive resistor of 1400Ω in parallel with a condenser having capacitance of 0.5µF, QR has a non-reactive resistor of 700Ω, RS has an unknown inductive resistor and SP has a non-reactive resistor of 400Ω. If it is given that the network is balanced, what would be the values of the unknown resistance and inductance across RS?
A.
Rx = 250Ω, Lx = 240 mH
B.
Rx = 220Ω, Lx = 200 mH
C.
Rx = 200Ω, Lx = 140 mHÂ
D.
Rx = 150Ω, Lx = 140 mH
A.
0000Â
B.
0101Â
C.
1010Â
D.
1111Â
12: An 8-bit digital to analog converter uses BCD input and produces a full-scale output of 9.90 Volt. What would be the analog output for the BCD input 1001 0101?
A. 9.9V
B. 9.5V
C. 8.9V
D. 8.5V
13: Which of the following gates is a universal gate?
A. AND gate
B. XNOR gate
C. XOR gate
D. NAND gate
A.
1.29 VÂ
B.
2.29 V
C.
3.26 V
D.
3.23 V
Which of the following are the main modules of a mass spectrometer instrument?
I) Mass analyzer
II) Extraction system
III) Detector
IV) Ionizer
A.
I, II, and IIIÂ
B.
I, III, and IV
C.
II, III, and IVÂ
D.
I, II, III, and IV
16: A 3mA meter having internal resistance of 100 ohm is to be converted to 0-160mA ammeter. What would be the value of the shunt resistance required?
A. 1.911 ohm
B. 1.351 ohm
C. 1.221 ohm
D. 2.121 ohm
17: Which of the following statements is false?
A. Hydraulic systems are generally more difficult to operate as compared to pneumatic applications.
B. Most hydraulic applications generally use bigger components than pneumatic applications.
C. Hydraulic system is operated with compressed air while Pneumatic system is operated by pressurised oil.
D. None of the above
A.
Ï€/2Â Â
B.
Ï€/4
C.
Ï€/3
D.
Ï€/6
A.
ABÂ
B.
BCÂ
C.
2BCÂ
D.
None of the above
A.
19.9 mAÂ
B.
14.9 mA
C.
17.9 mA
D.
21.9 mA
21: If a clamper has a capacitor of capacitance, C = 0.02µF and resistance, R=400 KΩ, then what would be the total discharge time for the capacitor?
A. 4 ms
B. 4.5 ms
C. 20 ms
D. 40 ms
22: Which of the following statements is false about Linear Convolution?
A. The length of the input sequence can be different.
B. Zero padding is not required.
C. Output sequence is non-periodic.
D. The length of the output sequence will not be greater than the length of input sequences.
E. None of the above
A.
-4
B.
5
C.
-6
24: To convert a JK flip-flop into a T flip-flop, what would be the input values of J and K?
A. J=K=0
B. J=K=1
C. J=0, K=1
D. J=1, K=0
E. None of the above
State True/False:
An operational amplifier produces an output voltage that is typically hundreds of thousands of times larger than the voltage difference between its input terminals.
A.
TrueÂ
B.
False
This question is based upon the figure shown below
To measure the capacitive impedance at a frequency of 3 kHz, a capacitance comparison bridge is used. Choose the correct equivalent series circuit of the unknown impedance if the bridge constants at bridge balance are given as:
C3 = 11 µF, R1 = 1.3 kΩ, R2 = 110 kΩ, R3 = 130 kΩ
A.
1
B.
2
C.
3
D.
4
A.
32.8 mA
B.
38.5 mA
C.
42.3 mA
D.
52.5 mA
A.
2V
B.
3V
C.
4VÂ
D.
5V
29: Which of the following statements is false about Voltmeter?
A. It is a voltage-measuring device, which measures potential difference between the two points of a circuit.
B. It is always connected in parallel with the circuit.
C. Its resistance is very less.
D. Deflecting torque in voltmeter is produced by a current, which is proportional to the voltage to be measured.
30: What would be the cut-off frequency, if a low-pass filter is built with a 20 nF capacitor and a 10 KΩ resistor?
A. 796.2 Hz
B. 596.3 Hz
C. 630.4 Hz
D. 581.2 Hz
31: If 400 fringes cross the centre of the field of view by moving one mirror through a distance of 0.1347mm in a Michelson Interferometer, then what would be the wavelength of the light?
A. 4323 Ã… (Angstrom)
B. 5388 Ã… (Angstrom)
C. 6735 Ã… (Angstrom)
D. 8321 Ã… (Angstrom)
32: Which of the following statements is false?
A. Piezoelectric materials are crystalline materials which when compressed along one of its axes; acquire an electrostatic charge on opposite faces of material.
B. Piezoelectric transducers are active transducers and do not require any external source of energy.
C. Piezoelectric transducers can be used to measure only limited number of quantities.
D. A piezoelectric transducer has very low DC output impedance.
E. None of the above
A.
TrueÂ
B.
False
A. A+A.B = A
B. A.(A+B) = A
C. A.1 = 1
D. A+1 = 1
State True/False:
When the Wheatstone bridge is balanced, the current through galvanometer is zero.
A.
TrueÂ
B.
False
36: If the H+ concentration is 3.0*10-3 M, then the pH value of a solution will be ____.
A. 4.52
B. 3.52
C. 2.52
D. 1.52
37: What would be the peak output voltage of a positive clamp, if an input signal of peak value 7V is applied with a bias of 4V?
A. 24 V
B. 18 V
C. 14 V
D. 11V
A. 1
B. 0
C. Infinite
D. None of the above
39: The inverse Discrete Fourier Transformation of x(n), an N-periodic signal can be expressed as ________.
A. 1
B. 2
C. 3
D. 4
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