PTU B.Tech ECE 5th Semester May 2019 58021 VIRTUAL INSTRUMENTATION and DATA ACQUISITION Question Papers

PTU Punjab Technical University B-Tech May 2019 Question Papers 5th Semester Electronic and Communication Engineering (ECE-EIE)

Roll No.
Total No. of Pages : 02
Total No. of Questions : 09
B.Tech.(EIE) (2011 & Onwards) (Sem.?5)
VIRTUAL INSTRUMENTATION & DATA ACQUISITION
Subject Code : EI-301
M.Code : 58021
Time : 3 Hrs. Max. Marks : 60
INSTRUCTION TO CANDIDATES :
1.
SECTION-A is COMPULSORY consisting of TEN questions carrying T WO marks
each.
2.
SECTION-B contains FIVE questions carrying FIVE marks each and students
has to attempt any FOUR questions.
3.
SECTION-C contains T HREE questions carrying T EN marks each and students
has to attempt any T WO questions.

SECTION-A
Q1.
Answer briefly :

a) Why there is need of modulation in telemetry?

b) Name the main characteristics of an ADC.

c) Name the common communication channels used for the telemetry.

d) What are the drawbacks of the pneumatic transmission?

e) What is scientific computing and how the LabVIEW is helpful?

f) Differentiate between a virtual and a traditional instrument.

g) What does polymorphic means in LabVIEW?

h) How do the clusters differ from the arrays?

i) What are local and global variables?

j) What is the basic difference between a waveform chart and a graph?


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SECTION-B
Q2.
Describe the main functional blocks of a typical PC based DAQ system.
Q3.
Describe in details the Pulse Amplitude Modulation system as used for telemetry.
Q4.
Differentiate between the MathScript node and formula node in LabVIEW.

Q5.
Discuss the parameters that are helpful in selection of DAQ measurement hardware.

Q6.
Differentiate between time and frequency division multiplexing as applied to telemetry.

SECTION-C
Q7.
(a) What functions are available to control the timings of loops in LabVIEW?


(b) Create a VI to compute the following equations and to plot the results on a waveform

graph.
y1 = x3 + 2x2 ? 5






y2 = x2 + 1


where x varies from 0 to 10 in steps of 1.0.

Q8.
(a) What are the different ways for connecting the instruments to the PC? How the

LabVIEW communicate with these instruments.

(b) Describe PCM telemetry.
Q9.
Explain the following measurement systems :

(a) Differential measurement system

(b) Referenced single ended measurement system

(c) Non-referenced single ended measurement system


NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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