ANU EEE: Assignment questions

IV/IV B.TECH 2nd SEM ASSIGNMENT 2 QUESTIONS:
CAPSA:

Id:

HVE:

EPDS:

FACTS:

CAPSA:

EPDS:

INDUSTRIAL DRIVE - ASSIGNMENT QUESTIONS – SESSIONAL: 1

1. Derive the equations for single phase fully-controlled rectifier of DC separately excited motor when operating at discontinuous conduction mode.

2. Derive the equation for single phase half-controlled rectifier of DC separately excited motor when operating at discontinuous conduction mode.

3. What are the different types of load torques? Explain them in detail.

4. A 210V, 1500 RPM, 200A separately excited motor has an armature resistance of 0.09 ohms. It is fed from a single phase fully-controlled rectifier with an AC source voltage of 230V, 50Hz. Assuming continuous conduction, calculate:

(1) Firing angle for rated motor torque and 1000RPM

(2) Firing angle for rated motor torque and -750 RPM

(3) Motor speed for α= 160⁰ and rated torque.

5. Explain clearly about conventional Ward-Leonard drive.

6. Derive the equivalent values of drive parameters having loads with both rotational and translational motions.

FACTS :

1. Explain the need for transmission interconnections.

2. What are the limits of loading capability , explain.

3. What are the objectives of shunt compensation, explain in detail

4. Explain operating principle of TCR. what is effect of delay angle an amplitude of fundamental TCR current

5. What is meant by power oscillation damping . explain how it can be achieve by using static VAR generator

6. Explain how transient stability enhancement can be achieved using STATCOM with the help of neat wavefomes.

HVE

1. Discuss the problems associated with peak voltmeter circuits using passive element .Draw& explain circuit development to over come these problems.

2. a)How is the wave front wave tiet times controlled in impulse generated circuits.

b) Explain different methods of producing switching impulses in test laboratories.

3. Give the schematic arrangement of an impulse potential divider with a CRO arrangement for measuring impulse voltages .Explain the arrangement used to minimize the errors.

4. a) Why is a cock croft walten circuit preferred for voltage multiplier circuit.

b) A 12 stage impulse genera tor has 0.126microfarady capacitors the wavefront & wavetier resistances are 800ohms&500ohms respectively. If the load capacitance is 1000pf find the front & tier times if the impulse wave produced.

5. a) Draw a simplified equivalent circuit of a resistance potential divider &discuss its step response

b) Explain how s sphere gap is used to measure the high peak voltages.

6. A cock croft voltantile voltage multiplier has 8 stages with capacitances all equal to 0.01microfarady. The supply transformer 2degre voltage is supplied is 10ma, find

a) percentage ripple

b) regulation

c) optimum no. of stages for minimum regulation.

d) Maximum o/p voltage.

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Important questions:

1.a)What are the different circuits that are used for producing impulse current waves and write down the expressions

b)Give a schematic arrangement of marx circuits for multistage impulse generation.

2. Explain the cascaded transformer connection for measuring of high alternating voltages with neat sketches

3.A generating voltmeter has to be designed so that it can have a range from 20 to 200kv,DC .If the indicating meter reads a minimum current of 2µA and the maximum current of 25µA .what should the capacitance of the generating voltmeter ,Assume that the driving motor has a synchronous speed of 1500rpm.

4.Explain the requirements of an oscilloscope for impulse measurements in HV test circuits and draw a layout of HV lap..

IV/IV B.TECH 1ST SEM ASSIGNMENT 2 QUESTIONS:

PSAS:

MID:

SGP:

UEP:

Industrial management:

PSOC:

DBMS:

1. (a) What is RAID technology? What are its main goals? What characterizes the levels in RAID organization? [3 M]

(b) Explain in detail about B⁺ trees. [3 M]

2. Write short notes on the following: [2 X 3M = 6M]

a. Join Dependency b. MVD c. Minimal Cover

3. (a) What are the desirable properties of decomposition? Explain. [2 M]

(b) By means of relevant example, explain the steps of algorithm that is used for testing for the lossless (non-additive) join property. [4 M]

4. (a) Explain in detail about serializabiity. [3 M]

(b) Define the concepts of recoverable, cascadeless, and strict schedules, and compare them in terms of their recoverability. [3 M]

5. (a) Discuss the timestamp ordering protocol for concurrency control. [3 M]

(b) How do optimistic concurrency control techniques differ from

other concurrency control techniques? Discuss the typical phases

of an optimistic concurrency control method. [3 M]

6. (a) Describe the write-ahead logging protocol. [2 M]

(b) Discuss the NO-UNDO/REDO method of recovery. [2 M]

UTILIZATION OF ELECTRICAL POWER

1. The distance b/w two stations is 1km and the schedule speed is 30kmph.station stopping time is 20sec. assume breaking retardation 3km/h/sec & maximum speed 1.25 times the average speed. Determine the acceleration required to run the service if the speed-time curve is approximated by a trapezoidal curve?

2. Sub-urban electric train has a max-speed of 70kmph. The scheduled speed including station stop of 30sec is 45kmph if the acceleration is 1.5km/h/sec. Find the value of retardation when the average distance stops is 6kms?

3.The maximum speed of sub urban electric train is 60km/hr ,its schedule speed is 40km/hr and duration of stops is 30 sec ,if the acceleration is 2km/hr and distance b/w stops is 2km .determine the detardation.

4.Explain about the indirect resistance heating with one application ?(Along with neat sketches)

5.What are different types of heat transfer ?Explain heat transfer methods?

6.Explain indirect arc furnace .

DBMS:

1. A)Describe the characteristics of data base approach

b) Discuss about the roles of various actors in DBMS and explain about various components of DBMS with neat sketch

2. a)Explain the diff b/w the Entity ,Entity type ,Entity set

b) Compare &contrast file system with DBMS and explain the role of DBA and its responsibilities

3. Explain the various relational algebra operations with examples and explain different relational data base constraints

4. (a) Describe the three-tier architecture of a database system.

(b) What is meant by data independence? Explain.

5. Specify the following queries on the company database schema, using the relational operators show the result of each query in Relational Algebra, Calculus and SQL.

a) Retrieve the names of all employees in department 5 who work more than 10 hours per week on the ‘ProductX’ project.

b) List the names of all employees who have a dependent with the same first name as themselves.

c) Find the names of all employees who are directly supervised by ‘Franklin Wong’.

6. The Prescriptions-R-X chain of pharmacies has oﬀered to give you a free lifetime supply of medicine if you design its database. Given the rising cost of health care, you agree. Here’s the information that you gather:

a) Patients are identiﬁed by an SSN, and their names, addresses, and ages must be recorded.

b) Doctors are identiﬁed by an SSN. For each doctor, the name, specialty, and years of experience must be recorded.

c) Each pharmaceutical company is identiﬁed by name and has a phone number.

d) For each drug, the trade name and formula must be recorded. Each drug is sold by a given pharmaceutical company and the trade name identiﬁes a drug uniquely from among the products of that company. If a pharmaceutical company is deleted, you need not keep track of its products any longer.

e) Each pharmacy has a name, address, and phone number.

f) Every patient has a primary physician. Every doctor has at least one patient.

g) Each pharmacy sells several drugs and has a price for each. A drug could be sold at several pharmacies, and the price could vary from one pharmacy to another.

h) Doctors prescribe drugs for patients. A doctor could prescribe one or more drugs for several patients, and a patient could obtain prescriptions from several doctors. Each prescription has a date and a quantity associated with it. You can assume that, if a doctor prescribes the same drug for the same patient more than once, only the last such prescription needs to be stored.

i) Pharmaceutical companies have long-term contracts with pharmacies. A pharmaceutical company can contract with several pharmacies, and a pharmacy can contract with several pharmaceutical companies. For each contract, you have to store a start date, an end date, and the text of the contract.

j) Pharmacies appoint a supervisor for each contract. There must always be a supervisor for each contract, but the contract supervisor can change over the lifetime of the contract.

Draw an ER diagram that captures the preceding information. Identify any constraints not captured by the ER diagram.

INDUSTRIAL MANAGEMENT:

1. 1. What is meant by scientific management

2. 2. Write a short notes on father of scientific management.

3. 3. Describe the features of sole proprietorship.

4. 4. What is meant by partnership firm.

5. 5.What is meant by govt. company .

6. 6..Difference b/w the holding company and statutory company.

SWITCHGEAR AND PROTECTION

1. Discuss briefly the role of protective relay in modern power systems .

2. Explain the principle of operation of directional relay where it is optimum.

3. Explain the principle of following distance characteristics with the help rs value

a)plain impedance characteristics

b)directional impedance characteristics

c) plain reactance characteristics

d)mho characteristics

e)offset mho characteristics

4. A 3-phase alternator has a line voltage of 11kv ,the generator is connected to circuit breaker to inductive resistance upto the circuit breaker is 5 ohms /phase.The distributed capacitance upto the circuit breaker between phase and neutral is 0.01 µf. determine the following

a)peak restriking voltage across circuit breaker

b)frequency of restriking voltage across circuit breaker

c)average breakup restriking voltage upto peak restraining voltage .

d)maximum rate of rise of restriking voltage.

5. Explain the arch interruction process in air braking circuit breaker incorporating arching hornes arc splitters magnetic blowout coils

6. Explain the working & operation of buchholz’s relay

POWER SYSTEM ANALYSIS AND STABILITY

1. A)Prove that per unit impedance of either side is same.

B)write the advantages of per unit system.

2. Derive the expression for average power in terms of symmetrical components

3. Explain different internal voltages & impedances of a S.C generator.

4. Derive poer angle equation of a syn machine connected to infinite bus bar.

5. Draw the reactance diagram of the power system shown ,the ratings of generator , motor & Transformer are given as follows as 50MVA,138kv in 40Ω line as base values .

G1-20MVA,18KV,X’=20%

G2-20MVA,18KV,X’’=20%

SYN MOTOR: 30 MVA,13.8KV,X’’=20%

3-Phase Y-Y Transformer:20 MVA,138/20KV,X’=10%

3-Phase Y-Δ Transformer:15MVA,138/13.8KV,X=10%