Download PTU M.Tech. ECE 2nd Semester 74283 RELIABILITY OF ELECTRONICS COMMUNICATION SYSTEMS Question Paper

Download PTU. I.K. Gujral Punjab Technical University (IKGPTU) M.Tech. ECE 2nd Semester 74283 RELIABILITY OF ELECTRONICS COMMUNICATION SYSTEMS Question Paper.

1 | M-74283 (S9)-2097
Roll No. Total No. of Pages : 02
Total No. of Questions : 08
M.Tech.(ECE) (EL-I 2016 Batch) (Sem.?2)
RELIABILITY OF ELECTRONICS COMMUNICATION SYSTEMS
Subject Code : MTEC-204 C
M.Code : 74283
Time : 3 Hrs. Max. Marks : 100

INSTRUCTIONS TO CANDIDATES :
1. Attempt any FIVE questions out of EIGHT questions.
2. Each question carries TWENTY marks.

1. a) Write in detail about replacement processes and policies.
b) Explain different modes of failures and life characteristics curve of failure.
2. Explain various kinds of systems. Calculate the reliability of a system having :
a) Series components
b) Parallel components
c) Parallel series components
3. How a product is evolved? Explain product development cycles using value engineering
approach.
4. a) What are the various factors affecting human reliability. Explain different methods
for predicting the same .
b) Explain the concept of safety margins in critical devices. What will be the effect of
increasing safety margins?
5. a) What is the application of Weibill distribution?
b) Explain the tie set and cut set method for predicting reliability.

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1 | M-74283 (S9)-2097
Roll No. Total No. of Pages : 02
Total No. of Questions : 08
M.Tech.(ECE) (EL-I 2016 Batch) (Sem.?2)
RELIABILITY OF ELECTRONICS COMMUNICATION SYSTEMS
Subject Code : MTEC-204 C
M.Code : 74283
Time : 3 Hrs. Max. Marks : 100

INSTRUCTIONS TO CANDIDATES :
1. Attempt any FIVE questions out of EIGHT questions.
2. Each question carries TWENTY marks.

1. a) Write in detail about replacement processes and policies.
b) Explain different modes of failures and life characteristics curve of failure.
2. Explain various kinds of systems. Calculate the reliability of a system having :
a) Series components
b) Parallel components
c) Parallel series components
3. How a product is evolved? Explain product development cycles using value engineering
approach.
4. a) What are the various factors affecting human reliability. Explain different methods
for predicting the same .
b) Explain the concept of safety margins in critical devices. What will be the effect of
increasing safety margins?
5. a) What is the application of Weibill distribution?
b) Explain the tie set and cut set method for predicting reliability.

2 | M-74283 (S9)-2097
6. Explain the various terms using examples:
a) Down time
b) Up time ratio
c) Mean time between failures
d) Operating time
e) Availability
f) Confidence level
g) Mean life
h) Corrective maintenance down time
i) Mission time availability
j) Reliability
7. a) Elaborate various kind of testing methods for equipments
b) What do you mean by stand by system? Explain various stand by redundancy.
8. a) A car fleet owner finds from his past records the cost per year of running a car and its
resale value as given below. The purchase of the car is Rs 25000. At what stage
should the car be replaced?
Year of operation Resale price at the end of
year
Annual operating
cost
Annual maintenance
cost
1 15000 6300 300
2 13500 7000 500
3 12000 7700 1000
4 9000 9500 1500
5 8000 11500 2500
6 7500 13000 3500
7 7000 14300 4500
b) Explain various types of maintenance with equation of maintainability.
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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