M Tech (Instrumentation) - Panjab University 2013 (Key)
M Tech (Instrumentation) - Panjab University 2013 (Key)
M Tech (Instrumentation) - Panjab University 2013 (Key)
2. The two port networks are connected in cascade. The combination is to be represented
as a single two port network. The parameters of the combined representation of the
network are obtained :
3. A coin is tossed three times. What is the probability that it lands on heads exactly one
time ?
7. Any number of current sources in parallel may be replaced by a single current source
whose current is the algebraic sum of individual source currents and source resistance is
the parallel combination of individual source resistance.
The above statement is associated with :
(A) Thevenins theorem (B) Superposition theorem
(C) Millmans theorem (D) Maximum power transfer theorem
8. Kirchoffs law is applicable to :
(A) passive networks only
(B) dc circuits only
9. One of the following laws of electrical network is used in node analysis of the network :
M. Tech. (Instrumentation)/BZL/48974-A 4
12. The transducer which requires an external power and their output is a measure of some
variation such as resistance, capacitance, inductance etc. are called as :
(A) Primary sensors (B) Active transducer
(C) Passive transducer (D) Self generating transducer
13. Errors due to assignable causes are called :
(A) static errors (B) systematic errors
(C) random errors (D) calibration errors
14. Which of the following have relatively large and negative temperature coefficient of
resistance ?
(A) Thermistors (B) Thormocouples
(C) Platinum resistance detectors (D) Radiation pyrometers
15. The pH value is a measure of hydrogen ion in a solution. The letters pH stands for :
(A) percentage of H2 in solution (B) presence of hydrogen ions
(C) purist of H2O (D) power of Hydrogen ion concentration
16. Which measurement is a good guide to the quality of the water ?
(A) potentiometry (B) dissolved O2 content
(C) conductometry (D) turbidity
17. The change in length of humidity sensitive elements is measured by :
(A) Hydrometer (B) Hygrometer
(C) Photometer (D) Psychrometer
18. What does a piezoelectric material generate in response to an applied force ?
(A) sound (B) resistance
(C) movement (D) electrical energy
19. Match the following List I (parameters) with List II (transducer) :
List I List II
1. Flow measurement W Radiant pyrometer
2. Temperature measurement X Dall tube
3. Angular velocity measurement Y Pirani gauge
4. Vacuum pressure measurement Z Gyroscope
(A) 1Y, 2Z, 3X, 4W (B) 1Z, 2Y, 3W, 4X
(C) 1X, 2W, 3Z, 4Y (D) 1W, 2Z, 3X, 4Y
M. Tech. (Instrumentation)/BZL/48974-A 6
28. The op-amp with the highest input impedance and the lowest output impedance
configuration is known as :
(A) Integrator (B) Voltage follower
(C) Inverting amplifier (D) Non Inverting amplifier
29. What characteristics would characterize an ideal op-amp ?
(A) An infinite voltage gain, zero input resistance, zero output resistance
(B) An infinite gain, zero input resistance, infinite output resistance
(C) An infinite voltage gain, infinite input resistance, infinite output resistance
(D) An infinite voltage gain, infinite input resistance and zero output resistance
30. What is a key characteristic of an instrumentation amplifier ?
(A) high CMRR (B) high output offset
(C) high output impedance (D) low input impedance
31. What is the primary application of a precision rectifier ?
(A) To rectify high level signals at precise level
(B) To rectify digital signals
(C) To rectify very low-level and signals
(D) To isolate two signals
32. How are the capacitor and resistor arranged with the input in a first order high pass
Butterworth filter ?
(A) The resistance is in series and the capacitor is in parallel
(B) The capacitor is in series and the resistance is in parallel
(C) The resistor and capacitor both in series with the input
(D) The resistor and capacitor both in parallel with the input
33. In a phase shift oscillator, how many RC cascaded networks as the feedback circuit are
used ?
(A) one (B) two
(C) three (D) four
34. A combinational logic circuit which generates a particular binary word or number is a :
(A) Decoder (B) Multiplier
(C) Encoder (D) De multiplexer
35. Convert the hexadecimal number 12 Hex into binary number :
(A) 01100 (B) 10010
(C) 01010 (D) 10011
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59. The Q meter works on the principle of :
(A) mutual inductance (B) self inductance
(C) series resonance (D) parallel resonance
60. The initial response when the output is not equal to input is called as :
(A) transient response (B) error response
(C) dynamic response (D) steady state response
61. The steady state error due to a ramp input for a type two system is equal to :
(A) constant (B) infinite
(C) zero (D) non zero number
62. The transfer function for the state variable representation
X = AX + Bu , Y = CX + Du is given by :
(A) B (SI A)1 C + D (B) C (SI A)1 D + B
(C) C (SI A)1 B + D (D) D (SI A)1 C + D
63. Which of the following is the best method for determining the stability and transient
response ?
(A) Root locus (B) Bode plot
(C) Nyquist plot (D) Polar plot
64. Gain cross over frequency is defined as :
(A) I G (j) H(j) I = 0 (B) I G (j) H(j) I =
(C) I G (j) H(j) I = 1 (D) I G (j) H(j) I = 1/2
65. The viscous friction co-efficient in force-voltage analogy is analogous to :
(A) reciprocal of inductance (B) reciprocal of conductance
(C) charge (D) resistance
66. Addition of a Pl controller in cascade with a plant :
(A) increases damping (B) increases the order of the system
(C) produces oscillations in response (D) reduces the order of the system
(C) ratio of the derivatives of the output and the input with all initial conditions zero
(D) ratio of the laplace transform of the output and that of the input with all initial conditions zero
(C) mass divided by electric charge (D) mass minus electric charge
70. The Beer-Lambert Law gives correlation with positive gradient between :
(A) perform FT
(C) modulate the interference pattern of the light beam from the source
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73. Korotkoff sounds are used :
(C) in heart valve functioning (D) as a reference for sound level measurement
74. Choose the correct match for signals and biological activity :
75. During an ECG recording what type of configuration is used when by connecting
2 electrodes one on left arm (LA) and another on left leg (LL) is made :
(C) Level III configuration (D) Both Level I and Level II configuration
11 12 13 14 15 16 17 18 19 20
A C B A D C B D C A
21 22 23 24 25 26 27 28 29 30
B C D C A D C B D A
31 32 33 34 35 36 37 38 39 40
C B C A B D C D B D
41 42 43 44 45 46 47 48 49 50
C B B A C B C D B C
51 52 53 54 55 56 57 58 59 60
A B A C A C B D C A
61 62 63 64 65 66 67 68 69 70
B C A C D B A D C A
71 72 73 74 75
C D B D C
Note: An 'X' in the key indicates that either the question is ambiguous or it has
printing mistake. All candidates will be given credit for this question.
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