1. COMMUNICATION AND LIFE SKILL PRACTICAL
27-03-2014 ( ROLL NO 1 TO 68)
2. DIGITAL ELECTRONICS AND INTEGRATED CIRCUITS PRACTICAL
28-03-2014 (ROLL NO 1 TO 50)
29-03-2014( ROLL NO 51 TO 68)
3. ELECTRICAL MACHINES AND INSTRUMENTATION PRACTICAL
31-03-2014 (ROLL NO 1 TO 50)
01-04-2014 (ROLL NO 51 TO 68)
EEE-STAFFS
Monday, March 24, 2014
Thursday, March 20, 2014
22043-ELECTRICAL DRIVES & CONTROL IMPORTANT QUESTIONS
DEPARTMENT OF
ELECTRICAL AND ELECTRONICS ENGINEERING
22043-ELECTRICAL
DRIVES & CONTROL
STAFF-IN-CHARGE:
N.DILLI BABU
IMPORTANT
QUESTIONS
UNIT-I
PART-A
1) What
is meant by resistance? What is unit
[OCT 2009/OCT 2013]
2) What
is reluctance [APR 2009]
3) What
is function of commutator? [OCT 2009]
4) State
the different type of D.C generator? [APR 2010]
5) Define
current. state it’s unit [APR 2011]
6) Define
magnetic flux [APR 2011]
7) Define MMF [OCT2011/OCT2013]
8) What
is function of D.C motor? [OCT 2011]
9) If
R1 & R2 are
connected in series , what is the
equivalent resistance ? [OCT 2013]
10) Mention
the four terminals of a four point starter. [OCT 2013]
PART-B
1) With
the neat sketches , explain the constructional details of a D.C generator.
[APR 2009/APR 2011/OCT 2011]
2)
With the neat sketches , explain the
constructional details of a D.C motor
[APR 2010/APR 2011/OCT 2013]
3) Explain
3 point starter with neat sketch [ OCT
2009/APR 2011]
4) Problem:1-15 (pg.no-1.20) [APR2005]
5) Problem
:1-14(pg.no-1.18) [OCT2011]
6) Explain
4 point starter with neat sketch
PART-C [4 MARK’S]
1) State
faraday’s law of electromagnetic induction[APR 2009/OCT 2011/APR 2011/OCT 2013]
2) Problem
:1-13(pg.no- 1-17) [APR 2004]
3) What
are the causes of voltage drop in D.C generator? [APR 2011]
4) List
the applications of different types D.C motor [APR 2011]
5) Draw
the neat diagram of a 4 point starter [OCT 2011]
6) When
two resistance R1,R2 are connected in series the total
resistance is RS=18 and when
they are connected parallel the total resistance RP=4 . Find R1
and ,R2 [OCT 2013]
UNIT-II
PART-A
1)
Write
is relation b/w the line voltage and phase voltage & line current and phase
current in star and delta connected system [oct-2009]
2)
Define
power in single phase circuit. state its formula [apr-2010]
3)
What are main parts of a transformer?
[apr-2010]
4)
State
the applications of capacitor start induction motor [apr-2010]
5)
Write
the types of starter – induction motor [apr-2011]
6)
State the application of induction motor [apr-2011]
7)
Write
the emf equation of a transformer. [oct-2011/apr-2013]]
8)
What
is the working principle of induction motor? [oct-2011]
9)
What
is meant by average value? [apr-2013]
10)Define the term phase voltage.
[apr-2013]
11)Name the types of three phase
induction motor [apr-2013]
12)What is RMS value? [oct-2013]
13)Define term line voltage. [oct-2013]
14)What are the losses in a transformer?
[oct-2013]
15)What are different speed control
methods of induction motor? [oct-2013]
PART-B
1)
Explain the principle and operation
of capacitor start induction motor. [apr-2009]
2)
Explain the construction and
operation of D.O.L starter [apr-2009/oct-2011/oct-2013]
3)
Explain the construction and operation of
star-delta starter [ oct-2009]
4)
Explain
different methods of speed control of three phase induction motor.[apr-2010]
5)
Explain the construction of
transformer.[apr-2010/apr-2013]
6)
Explain
the working of squirrel cage three induction
motor. [apr-2010]
7)
State
the losses in the transformer and explain it. [apr-2011]
8)
Explain the constructional features
of an alternator with suitable diagram. [oct-2011]
9)
Explain
the principle and operation of 3 phase induction motor [apr-2013]
10)Explain the constructional details of
salient pole alternator with neat sketches. [oct-2013]
UNIT-III
PART-A
1)
State any two application of stepper motor
(oct-2011/apr-2013)
2)
What is meant by energy conservation?(apr-2011)
3)
Name
the types of
servomotor.(apr-2013)
4)
Mention the different types of electrical
drives.(apr-2013)
5)
What is electrical shock?(aor-2013)
6)
What is step angle?(oct-2013)
7)
What is meant by servo mechanism?(oct-2013)
8)
What are the parts of electric drive?(oct-2013)
9)
Mention the types of earthing.(oct-2013)
10) What
is individual drive?
11) What
is half stepping?
12) Write
one precaution of avoid electric shock.
13) What
is group drive?
PART-B
1)
Explain
the construction and working of a stepper motor (april-2011/oct-2011/apr-2013)
2)
State
the causes of accidents and their preventive measures in industry (april-2011)
3)
Explain
half stepping switching sequence of stepper motor with neat diagram and with
switching table(oct-2013)
4)
(i) List
out the precautions to be taken to avoid electric shock.
(ii) write the short notes
energy conservation.(oct-2013)
5)
Write
the importance of earthing.
6)
PMDC & SERVO –motor(apr-2013)
7)
What is meant by industrial drives . list the
types and explain any two in details
UNIT-IV
PART-A
1) What
is positive logic(apr-2011/apr-2013)
2) Write
the Boolean expression for two input NAND gate.(oct-2011)
3) What
is rectifier?(oct-2013)
4) Identify
and name the terminals of a
diode.(oct-2013)
5) Mention
the types of SMPS(oct-2013)
6) What
is negative logic?(oct-2013)
7) What
is diode& draw the symbol.(apr-2013)
8) What
is inverter?(apr-2013)
9) What
is forward biasing?
10) State any
two application of SMPS.
11) Why do you
want need filter in rectifier?
12) Expand
SMPS & UPS
PART-B
1)
With
diagram explain forward biasing and reverse biasing of PN junction diode &
V-I characteristics(apr-2011/oct-2013)
2)
Explain
the working of half & full wave
rectifier with a need diagram. Also draw its input and output
waveforms.(oct-2011/apr-2013)
3)
(i)
Write short notes on seven segment LED.
(ii) Draw the symbol and write the truth table of
NOR, EX-OR and NAND gates(oct-2013)
4)
Draw
the symbols and write the truth tables of OR, AND, NOT,
NAND & NOR gates.(apr-2013)
5) Write
the short notes on LCD & LED
6) Write
short notes on SMPS,UPS & INVERTER
7) Necessity
of filters
UNIT-V
PART-A
1) Name
any two input elements used in PLC system.(apr-2011/apr-2013)
2) State
any two application of PLC.(apr-2011)
3) What
are the features of PLC?(OCT-2011)
4) Draw
the ladder diagram for obtaining AND logic.(oct-2011)
5) What
is meant by fuse?(apr-2013)
6) Mention
any two types of sensors.(apr-2013)
7) Expand
ELCB.(apr-2013)
8) List
the types of fuse.(oct-2013)
9) Draw
the symbol of NO & NC contacts.(OCT-2013)
10) What is a
circuit breaker?(oct-2013)
11) List any
two advantages of PLC.(oct-2013)
12) Expand
MCCB, MCB, OCB.
PART-B
1)
Explain
(i) Limit switch, (ii) Reed switch,
(iii)Pressure switch & (iv)Float switch (apr-2011/2013)
2) Design
a ladder diagram for operation of motor using AND & OR logic.(apr-2011)
3) Describe
about input, output elements and memory system of a PLC.(OCT-2011)
4) (i)
Draw a neat sketch of solenoid type contactor.
(ii) List the advantages of PLC. (APR-2013)
5)
Explain
the construction and working of ELCB with a neat diagram.(oct-2013)
6)
Draw
and explain the block diagram of PLC. (OCT-2013)
******** ALL THE
BEST*********
Tuesday, March 18, 2014
23041-ELECTRICAL MACHINES II IMPORTANT QUESTIONS
KUMARAN POLYTECHNIC COLLEGE
DEPARTMENT OF
ELECTRICAL AND ELECTRONICS ENGINEERING
23041-ELECTRICAL
MACHINES II
STAFF-IN-CHARGE: N.SURESH KUMAR
IMPORTANT
QUESTIONS
UNIT-I
PART-A
1. Write the expression for distribution factor.
2. Write any one advantage of rotating type field in the
3 phase alternator.
3. What is slot angle with respect to 3 phase alternator?
4. Write any one merit of hydrogen cooling method of
alternator.
5. Define Pitch factor
6. What type of rotor has been used in turbo alternator?
7. Write any two advantages of Short chorded winding
8. Define fractional Pitched Winding
9. Define slot angle
10. Explain the term Double layer
11. Calculate the distribution factor for 48 slots 4 pole
single layer 3 phase winding
12. Write the EMF equation of an alternator
PART-B
1. Derive the EMF Equation of an
Alternator. (12)
2. What are the advantages of
Hydrogen cooling. (12)
3. Explain the basic principles of salient pole type alternator with the
help of a neat diagram. (12)
4. Explain the constructional details of stator and rotor
of a salient pole Alternator with neat diagram..
5. Explain the methods adopted to obtain sine wave shape
of emf induced in the alternator.
UNIT-II
PART-A
1. Write the equation of voltage regulation of
alternator.
2. What is armature reaction with reference to
alternator?
3. What is necessity of parallel operation of alternator?
4. What is the use of circle diagram?
5. Define synchronous reactance
6. On what condition the switch should be closed by Dark
lamp method?
7. What are the types to find voltage regulation in
alternator?
8. Write any one effect of changing excitation of
alternator?
9. Draw the Load characteristic of an alternator
10. On what condition the switch should be closed by Dark
lamp method?
11. Write any two causes for voltage drop in alternator
12. What are the conditions for parallel operation of two
alternators?
13. What is armature leakage reactance?
PART-B
1.
What are the causes of voltage drop in
alternator? Draw the vector diagram of a loaded alternator and determine the
voltage regulation.
2.
Explain the synchronizing of alternator
by dark lamp method.
3.
Explain load sharing of two alternator
4.
An alternator has the following data
(i) 3 phase alternator (ii) no. of poles =8 (iii) distribution factor=.985 (iv)
flux/pole=.040 Wb (v) no. of slots on the armature=90 (vi) no. of
conductor/slot=8 (vii) full pitched winding (viii) speed of alternator=600rpm.
Determine the no load terminal voltage.
5. Draw neat circuit diagram and briefly explain open
circuit and short circuit test.
6. An alternator has the following data (a). Number of
phases is 3 (b)Number of slots on the Armature is 90 (c)Number of poles is10 (d)Number
of conductor per slot is 8 (e)Distribution factor is 0.965 (f)full pitched
winding (g)flux per pole is 0.040 wb (h)speed of alternator is 600 rpm (i)Connection
is star. Determine No Load Terminal voltage.
7. Explain Armature reaction of an Alternator
8. Briefly explain effect of change in excitation
UNIT-III
PART-A
1. What is slip with reference to three phase induction
motor?
2. Write any two applications of 3 phase Induction motor
3. What are different types of speed control in 3 phase
induction motor?
4. Write the expression of synchronous speed in 3 phase
induction motor.
5. Compare slip ring and cage motor. (any one point)
6. Write the expression for rotor emf equation of 3 phase
induction motor.
7. What is crawling?
8. What is the condition for maximum starting torque?
9. What are the types of rotor?
10. What is the use of circle diagram?
11. Write the Slip Equation
12. Draw the Slip-Torque characteristic curve
13. Which type of lamination is done by core in squirrel
cage rotor?
14. What is the use of pole changing method?
PART-B
1.
Explain No load
and Blocked rotor test of 3 phase induction motor.
2.
Explain how
rotating magnetic field is produced in 3 phase induction motor by explaining
the principle of its operation by means of a neat diagram.
3.
Compare
squirrel case and slip ring Induction Motor
4.
Explain star
delta starter with the help of the control diagram.
5. Explain Rotating Magnetic Field produced by 3 phase 2
pole system
6. Explain Rotor Resistance starter with a neat diagram
UNIT-IV
PART-A
1.
What are the
two types of single phase capacitor type motor?
2.
Write the
applications of synchronous motor.
3.
Write any two
methods of starting of synchronous motor
4.
Mention any one
application of single phase capacitor start induction motor.
5.
Is synchronous
motor is self starting.
6.
Write any two
applications of split phase induction motor
7.
What is the
principle of synchronous motor?
8.
What is the name
used in the motor having the lowest rating than 1 HP?
9.
What are the two
types winding used in single phase motor?
10. What is the use of centrifugal switch?
11. Which type of Motor is used in Drilling Machine?
PART-B
1. Explain ‘V’ Curve and Inverted
‘V’ curve of synchronous motor.
2. Explain principle of working Split Phase Induction
Motor
3. Explain effect of excitation on
armature current and power factor of a synchronous motor.
4. Explain the double field revolving theory for single
phase induction motor with neat diagram
5. Explain capacitor Start and Run Motor with a neat
diagram
UNIT-V
PART-A
1.
Write any one
quality of good transformer oil.
2.
How will you
measure earth resistance?
3.
List any two
types of oil purification.
4.
Write any one
point to take care of bearing of 6 phase induction motor.
5.
What are common
troubles in Induction Motor?
6.
Write the cases
of noise and vibration of induction motor.
7.
What do you
understand by vacuum impregation?
8.
Which
instrument is used to measure the insulation resistance?
9.
What are the
types of Balancing?
10. What is the B.D.V. value of good transformer oil?
11. Define single phasing
12. State any two installation procedure when an induction
motor is installed.
13. What is mean by voltage test?
14. Define earthing
PART-B
1.
What are the
causes of noise and vibration of an Induction Motor
2. Explain any five points to be
followed in installation and commissioning of induction motor.
3. Explain any one method of Oil
Purification
4. Write any six points for the
common troubles and their remedies for induction motor starters
5. Explain continuity test and short circuit on
distribution Transformer
6. Explain Transformer Earthing and Measurement of Earth
Resistance.
ALL THE BEST
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