Results for Industrial Extension Officer

Basic Electrical Engineering MCQ-14

August 15, 2019

Basic Electrical Engineering MCQ-14




41. Which of the following statement about D.C. generators is false ?
(a) Compensating winding in a D.C. machine helps in commutation
(b) In a D. C. generator interpoles winding is connected in series with the armature
winding
(c) Back pitch and front pitch are both odd and approximately equal to the pole pitch
(d) Equilizing bus bars are used with parallel running of D.C. shunt generators
Ans: d
42. The demagnetising component of armature reaction in a D.C. generator
(a) reduces generator e.m.f.
(b) increases armature speed
(c) reduces interpoles flux density
(d) results in sparking trouble
Ans: a
43. Magnetic field in a D.C. generator is produced by
(a) electromagnets
(b) permanent magnets
(c) both (a) and (b)
(d) none of the above
Ans: a
44. The number of brushes in a commutator depends on
(a) speed of armature
(b) type of winding
(c) voltage
(d) amount of current to be collected
Ans: d
45. Compensating windings are used in D.C. generators
(a) mainly to reduce the eddy currents by providing local short-circuits
(b) to provide path for the circulation of cooling air
(c) to neutralise the cross-magnetising effect of the armature reaction
(d) none of the above
Ans: c
46. Which of the following components of a D.C, generator plays vital role for providing
direct current of a D.C. generator ?
(a) Dummy coils
(b) Commutator
(c) Eye bolt
(d) Equilizer rings
Ans: b
47. In a D.C. generator the ripples in the direct e.m.f. generated are reduced by
(a) using conductor of annealed copper
(b) using commutator with large number of segments
(c) using carbon brushes of superior quality
(d) using equiliser rings
Ans: c

48. In D.C. generators, lap winding is used for
(a) high voltage, high current
(b) low voltage, high current
(c) high voltage, low current
(d) low voltage, low current
Ans: b
49. Two generators A and B have 6-poles each. Generator A has wave wound armature
while generator B has lap wound armature. The ratio of the induced e.m.f. is generator A
and B will be
(a)    2 : 3
(b) 3 : 1
(c) 3 : 2
(d) 1 : 3
Ans: b
50. The voltage drop for which of the following types of brush can be expected to be least ?
(a) Graphite brushes
(b) Carbon brushes
(c) Metal graphite brushes
(d) None of the above
Ans: c
Basic Electrical Engineering MCQ-14 Basic Electrical Engineering MCQ-14 Reviewed by Bibi Mohanan on August 15, 2019 Rating: 5

Basic Electrical Engineering MCQ- 13

August 15, 2019


Basic Electrical Engineering MCQ- 13


31. D.C. generators are connected to the busbars or disconnected from them only under the
floating condition
(a) to avoid sudden loading of the primemover
(b) to avoid mechanicaljerk to the shaft
(c) to avoid burning of switch contacts
(d) all above
Ans: d
32. Eddy currents are induced in the pole shoes of a D.C. machine due to
(a) oscillating magnetic field
(b) pulsating magnetic flux
(c) relative rotation between field and armature
(d) all above
Ans: c
33. In a D.C. machine, short-circuited field coil will result in
(a) odour of barning insulation
(b) unbalanced magnetic pull producing vibrations
(c) reduction of generated voltage for which excitation has to be increased to maintain the
voltage
(d) all above
Ans:
34. Equilizer rings are required in case armature is
(a) wave wound
(b) lap wound
(c) delta wound
(d) duplex wound
Ans: b
35. Welding generator will have
(a) lap winding
(b) wave winding
(c) delta winding
(d) duplex wave winding
Ans: a
36. In case of D.C. machine winding, number of commutator segments is equal to
(a) number of armature coils
(b) number of armature coil sides
(c) number of armature conductors
(d) number of armature turns
Ans: a
37. For a D.C. machines laboratory following type of D.C. supply will be suitable
(a) rotary converter
(b) mercury are rectifier
(c) induction motor D.C. generator set
(d) synchronous motor D.C. generator set
Ans: c
38. The function of pole shoes in the case of D.C. machine is
(a) to reduce the reluctance of the magnetic path
(b) to spread out the flux to achieve uniform flux density
(c) to support the field coil
(d) to discharge all the above functions
Ans: d
39. In the case of lap winding resultant pitch is
(a) multiplication of front and back pitches
(b) division of front pitch by back pitch
(c) sum of front and back pitches
(d) difference of front and back pitches
Ans: d
40. A D.C. welding generator has
(a) lap winding
(b) wave moving
(c) duplex winding
(d) any of the above
Ans: a
Basic Electrical Engineering MCQ- 13 Basic Electrical Engineering MCQ- 13 Reviewed by Bibi Mohanan on August 15, 2019 Rating: 5

Basic Electrical Engineering MCQ- 12

August 15, 2019

Basic Electrical Engineering MCQ- 12
21. In D.C. generators, current to the external circuit from armature is given through
(a) commutator
(b) solid connection
(c) slip rings
(d) none of above
Ans: a
23. Brushes of D.C. machines are made of
(a) carbon
(b) soft copper
(c) hard copper
(d) all of above
Ans: a

24. If B is the flux density, I the length of conductor and v the velocity of conductor, then
induced e.m.f. is given by
(a)Blv
(b)Blv2
(c)Bl2v
(d)Bl2v2
Ans: a
25. In case of a 4-pole D.C. generator provided with a two layer lap winding with sixteen
coils, the pole pitch will be
(a) 4
(b) 8
(c) 16
(d) 32
Ans: b

26. The material for commutator brushes is generally
(a) mica
(b) copper
(c) cast iron
(d) carbon
Ans: d
27. The insulating material used between the commutator segments is normally
(a) graphite
(b) paper
(c) mica
(d) insulating varnish
Ans: c
28. In D.C. generators, the brushes on commutator remain in contact with conductors
which
(a) lie under south pole
(b) lie under north pole
(c) lie under interpolar region
(d) are farthest from the poles
Ans: c
29. If brushes of a D.C. generator are moved in order to bring these brushes in magnetic
neutral axis, there will be
(a) demagnetisation only
(b) cross magnetisation as well as magnetisation
(c) crossmagnetisation as well as demagnetising
(d) cross magnetisation only
Ans: c

30. Armature reaction of an unsaturated D.C. machine is
(a) crossmagnetising
(b) demagnetising
(c) magnetising
(d) none of above
Ans: a

Basic Electrical Engineering MCQ- 12 Basic Electrical Engineering MCQ- 12 Reviewed by Bibi Mohanan on August 15, 2019 Rating: 5

Industries Extension Officer Synchronous motor mcq part2

March 30, 2019

Industries Extension Officer Synchronous motor mcq part2



11. In a 3-phase synchronous motor
A. the speed of stator MMF is always more than that of rotor MMF
B. the speed of stator MMF is always less than that of rotor MMF.
The speed of stator MMF is synchronous speed while that of
rotor MMF is zero.
D. rotor and stator MMF are stationary with respect to each other


12. A salient pole synchronous motor is running at no load. Its field
current is switched off. The motor will
A. come to stop.
B. continue to run at synchronous speed
C. continue to run at a speed slightly more than the synchronous speed
D. continue to run at a speed slightly less than the synchronous speed


13. Asynchronous motor is called a synchronous capacitor, when it is:
A. under loaded
B. under excited
C. over excited
D. overload


14. The size of a synchronous motor is determined by the its..
A.KVA rating
B. kW rating
C. KVAR rating
D. none of the above


15. The synchronous speed for a 3 phase 6-pole induction motor is 1200
rpm. If the number of poles is now reduced to 4 with the frequency
remaining constant, the rotor speed with a slip of 5% will be.
A. 1690 rpm B.1750 rpm C. 1500 rpm D. 1710 rpm


16. The maximum power for a given excitation in a synchronous motor
is developed when the power angle is equal to
A.
B.45
C. 60
D.90



17. Asynchronous motor delivers reactive power when.....
A. over excited
B. under excited
C. normally excited
D. none of the above


18. In synchronous motor out of the following losses, which one will
have the highest proportion ?
A. stator copper losses
B. friction and windage losses
C. eddy current losses
D. iron losses


19. The capacity of a synchronous capacitor is generally in the range of
A. VAR B.MVAR C .KVAR D. none of the above


20.
The cost of leading power factor synchronous motor is. .. unity
power factor motors
B. more than
A. less than
C. about the same
D. none of the above
Industries Extension Officer Synchronous motor mcq part2 Industries Extension Officer Synchronous motor mcq part2 Reviewed by Bibi Mohanan on March 30, 2019 Rating: 5

Industries Extension Officer Synchronous Motors MCQs

March 30, 2019

SYNCHRONOUS MOTORS


11.A three phase synchronous motor will have:
A.no slip rings
B. three slip rings
C. four slip rings
D. two slip rings

2.When a synchronous motor is running at synchronous speed, the
damper winding produces
A. damping torque
B. eddy current torque
C. torque aiding the developed torque. 
D. no torque

3. A motor which can conveniently be operated at lagging as well as leading power factors is the
A. squirrel cage induction motor. 
B. wound rotor induction motor
C. synchronous motor
D. DC shunt motor


5. The max'm speed of a synchronous motor in India is:
A. 1500 rpm. B. 1000 r.p.m C. 750 rpm. D.3000 rpm.
The rotor of a synchronous motor is excited with DC when the motor
A. is at standstill 
B. approaches synchronous speed
C. approaches half synchronous speed 
D. none of the above


6. KW rating of synchronous motor exciter is about ....% of the KVA rating of synchronous motor
A. 3
B.
SEC. 10
D. 15

7.
Synchronous speed of an induction motor is always:
A. equal to rotor speed
B. greater than rotor speed
C. twice the rotor speed
D. less than rotor speed

8.
Synchronous speed of an induction motor is 1000 rpm.
What will be the rotor speed, if slip is 3%
A. 30 rpm
B.300 rpm. C. 1700 rpm D.970 rpm


9Asynchronous motor, connected to an infinite bus is working at
leading p.f. It's excitation is
A. less than supply voltage Vs
B. equal to Vs
C.> Vs
D. none of these

10. Synchronizing power comes into play when the rotor speed is
A. equal to Synchronous speed Ns
C. SNs
D. either more
Industries Extension Officer Synchronous Motors MCQs Industries Extension Officer Synchronous Motors MCQs Reviewed by Bibi Mohanan on March 30, 2019 Rating: 5

Industries Extension officer Rank file|Books for Industries Extension officer

March 30, 2019

Industries Extension officer Rank  file|Books for Industries Extension officer



In this post I will discuss about the important books for the preparation of Industries Extension officer Exam.

First of Let us go through the syllabus

Syllabus:

An Objective Type Test 

 Part I : Questions based on Educational qualification
Part II: GK, Current Affairs and Renaissance of Kerala

Main Topics:-

Part I - Basic Civil Engineering
Part II - Basic Mechanical Engineering
Part III - Basic Electrical Engineering
Part IV - Basic Electronics
Part V - Basic Computer Science

Industries Extension officer Rank  file


This book is published by Electron college; it is a good book for kick starting the preparation of Industries Extension officer .

you can check it Here. Buy it HERE

you can also check other books in My Notebook Store


Also check ;
Industries Extension officer Rank file|Books for Industries Extension officer Industries Extension officer Rank file|Books for Industries Extension officer Reviewed by Bibi Mohanan on March 30, 2019 Rating: 5

Industrial Extension officer Ranklist 2010

March 30, 2019

Industrial Extension officer Ranklist 2010

You can watch the detailed Video HERE
Click Here to download official notification of IEO 2012
The Exam category Number: 403/2010
Number of candidates : 10642
Exam on : 02/03/2012, Friday    08.00 AM to  09.15 AM
(Maximum Marks : 100)
(Duration: 1.15 Hours)
( Medium of Questions: English )
Final Answer Key of Industries Extension officer
Shortlist Published on: 08/07/2013
You can download it HERE
Ranklist Published on: 22/04/2014
Ranked List No. 236/14/SSIV
You can download the Ranklist HERE

Syllabus:

An Objective Type Test (OMR - Valuation) based on the qualification prescribed for the post

Main Topics:-

Part I - Basic Civil Engineering
Part II - Basic Mechanical Engineering
Part III - Basic Electrical Engineering
Part IV - Basic Electronics
Part V - Basic Computer Science

 Visit EEE Made Easy for Study Materials

 Industries Extension officer Rank file BUY Here
Other Books for Industries Extension officer can be bought from HERE
You can Visit My Notebook Store also
WATCH INDUSTRIES EXTENSION OFFICER Coaching Classes HERE

Read also;

  1. Industries Extension officer 2018 Notification,Syllabus, Preparation Strategy etc
  2. Books for Industries Extension officer

Important Play lists:

Industrial Extension officer Coaching
Railway JE/ SSC JE Coaching 
Basic Electrical Engineering
Basic mechanical Engineering
Basic Electronics Engineering
Basic Civil Engineering 

 You can watch the detailed Video HERE
Click Here to download official notification of IEO 2012
The Exam category Number: 403/2010
Number of candidates : 10642
Exam on : 02/03/2012, Friday    08.00 AM to  09.15 AM
(Maximum Marks : 100)
(Duration: 1.15 Hours)
( Medium of Questions: English )
Final Answer Key of Industries Extension officer
Shortlist Published on: 08/07/2013
You can download it HERE
Ranklist Published on: 22/04/2014
Ranked List No. 236/14/SSIV
You can download the Ranklist HERE

Syllabus:

An Objective Type Test (OMR - Valuation) based on the qualification prescribed for the post

Main Topics:-

Part I - Basic Civil Engineering
Part II - Basic Mechanical Engineering
Part III - Basic Electrical Engineering
Part IV - Basic Electronics
Part V - Basic Computer Science
Visit EEE Made Easy for Study Materials
Industries Extension officer Rank file BUY Here
Other Books for Industries Extension officer can be bought from HERE
You can Visit My Notebook Store also
WATCH INDUSTRIES EXTENSION OFFICER Coaching Classes HERE

Read also;

  1. Industries Extension officer 2018 Notification,Syllabus, Preparation Strategy etc
  2. Books for Industries Extension officer

Important Play lists:

Industrial Extension officer Coaching
Railway JE/ SSC JE Coaching 
Basic Electrical Engineering
Basic mechanical Engineering
Basic Electronics Engineering
Basic Civil Engineering 
Industrial Extension officer Ranklist 2010 Industrial Extension officer Ranklist 2010 Reviewed by Bibi Mohanan on March 30, 2019 Rating: 5
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