sub - Switchgear and protection Utu previous year question papers

B.tech Examination papers dec 2014
sub - Switchgear and protection
Utu previous year question papers
uttarakhand technical university previous question papers

Time : 3 hrs
Q1: Attempt any four :

1. Explain static relay and write its merits and demerits.
2. Explain electromagnetic impedance relay.
3. What are the various types of over current relays? Discuss their are of applications.
4. Explain Directional Over-current relay?
5. The current rating of a relay is 5A. PSM=2, TSM=0.3, CT ratio=400/5, fault current= 4000A. Determine the operating time of the relay. At TMS= 1, operating time various PSM are:
   PSM=                                2         4        5        8        10        20
   operating time in seconds=  10       5        4        3       2.8        2.4

Utilization of Electrical Energy and Traction. UTU (uttrakhand technical university previous year question papers)

B.tech question papers
sub- Utilization of Electrical Energy and Traction.
UTU (uttrakhand technical university
previous year question papers)
Dec 2014

Q1: Attempt any four:

1. What are the advantages of induction heating? Give classification of various heating methods.
2. What is Ajax-Wyatt Furnace? Describe construction, principle of operation and application of this furnace.
3. Discuss advantages of electrically produced heat. State the properties of a heating element used for this heating.
4. Explain with help of neat sketch the working of Ajax Wyatt furnace.
5. A 40KW 3 phase 400v, resistance oven is to employ nichrome strip 0.25mm thick for the three star-connected heating elements. If the wire temperature is to be 1200C and that of the charge is to be 800C, estimate a suitable width for the strip. Assume emissivity= 0.9 and radiating efficiency=0.5. Also determine the temperature of the wire when the charge is cold.
6. What are the factors which limit the choice of frequency in induction and dielectric heating?

SWITCH GEAR AND PROTECTION (utu previous question papers)

SWITCH GEAR AND PROTECTION
SEM-VII, 2012-13
B.TECH EXAMINATION
UTTARAKHAND TECHNICAL UNIVERSITY
(UTU)

Time: 3 Hours

Total Marks: 100

Note: Attempt all the questions.

Attempt any four parts of the followings:

1. Explain role of protection in a power system. What are the fundamental requirements of protective relaying?
2. Discuss the role of back up protection. What is the various method of giving back up protection?
3. Discuss briefly the following:
   (a) Pick up
   (b) Selectivity
   (c) Stability
   (d) Flag indicator
   (e) Burden of relay
4. What do you mean by PSM and TMS? Explain how these factors are affecting the relay operation?
5. Explain the working principle of induction type electromagnetic relay.
6. What is Buchholz relay? Which equipment is protected by it? For what type of fault is it employed? With neat diagram discuss its working principle.

ANN AND FUZZY LOGIC

ANN AND FUZZY LOGIC
SEM-VII, 2012-13
B.TECH EXAMINATION
UTTARAKHAND TECHNICAL UNIVERSITY
(UTU)

Time: 3 hours

Total Marks: 100

Note: Attempt all questions.

Answer any four:

1. What is a biological neuron? Given its structure and explain its functioning.
2. Explain McCulloh Pitts model of artificial neuron.
3. Using artificial neuron model with 'Threshold' function show its use as 'OR' and 'AND' gates.
4. Differentiate between a single layer perception and a multi layer perception.
5. Discuss log sigmoid and tan sigmoid activation functions.
6. Draw an MLP of [5, 3, 2] structure and mark the directions of signal and error flow.

Answer any four:

1. Draw any four types of membership functions and give their mathematical expressions.
2. How is a fuzzy set represented? Define support, height and compliment of a fuzzy set.
3. If A = [a₁, a₂] and B = [b₁, b₂] are two fuzzy sets, what will be the resulting sets after performing addition, subtraction, multiplication and division operations on the sets?
4. Describe briefly Mamdani's inference system.
5. What do you understand by 'Cartesian product' of two fuzzy sets? If A = {0.2/x₁, 0.5/x₂, 1/x₃} and B = {0.3/y₁, 0.9/y₂} find the Cartesian product between A and B.
6. What is Defuzzification? Give various methods of defuzzification.