104/2015
Maximum: 100 marks Time: 1 hour and 15 minutes
l. The supply frequency of alternating current in India:

60 Hz 50Hz


100Hz 40Hz


2. A lead acid battery of 24 volts consists

12 cells in parallel 6 cells series


24 cells in parallel 12 cells in series


3. The quality of a good conductor is

any specific resistance medium specific resistance


low specific resistance high specific resistance


4. Unit of capacitance denotes in

Farad Siemens


Ohm Henry


5. The term "C F L" stands for:

Chloro Fluro Lamp Carbon Filament Lamp


Compact Fluorescent Lamp Cathod Filament Lamp


6. Which of the following is a good semi conductor?

Germanium Brass


Mercury Fibre


7. A generator converts:

Electrical energy into mechanical energy


Mechanical energy into electrical energy


Mechanical energy into potential energy


Electrical energy into kinetic energy


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8. If five resistances of 5 ohm is connected in parallel the total resistance will be

5 ohm 10 ohm


2.5 ohm 1 ohm



9. Which of the following gives Direct Current?

Transformer Alternator


D.C. Generator AC. Motor



10. The abbreviation "P C B" stands for:

Polythene Circuit Board Printed Circuit Board


Permanent Circuit Board Paraffin Circuit Board



11. In a series circuit:

Voltage is divided and current will be same


Current is divided and voltage will be same


Current and voltage will be same


Current and voltage will be divided



12. Which material is used for making heating element?

Copper Silver


Nichrome Carbon



13. Which material is used for making bulb filament?

Silicon Tungsten


Eureka Tantallum



14. Multimeter is used for measuring:

Resistance Voltage


Current All the above



15. As per Ohm's law which statement is correct?

I VIR V=IIR


R=VxI I=VxR



16. Moving coil instrument is used for measuring:

AC. Values D.C. Values


Both AC and D.C Values None of the above



17. The unit of electric charge: CA) Ampere Volt
Coulomb Hertz

18. Electrolyte used in lead acid battery is

Hydrochloric acid Sulphuric acid


Nitric acid Citric acid



19. The purpose of using £lux in soldering is CA) It makes the solder to £low rapidly It cleans the job
It prevents oxidation All the above

20. A 1000 Watts bulb connected to 250 Volts supply. How much current does it take?
10 Amps 8 Amps
CC) 4 Amps 2.5 Amps


21. The resistance of a 100 Watts bulb at 250 Volts supply is CA) 625 ohms 62.5 ohms
62500 ohms 6.25 ohms

22.
The material used for making fuse wire is: CA) Aluminium Nickel CC) Lead and Tin alloy Cobalt

23.
The C.G.8 unit of heat is:


Joule Watt


Temperature Calorie



24.
The insulation used between the commutator segment is


Mica Bakelite


Porcelain PVC



25.
The R.P.M of a 4 pole Alternator at 50 Hz supply is


6000 3000


1500 2000



26.
The material used for making brush in a D.C. Machine:


Bakelite Copper


Lead Carbon



27.
The height of a switch board to be fixed in domestic wiring:


2 meters 1.5 meters


1 meter 1.75 meters



28.
The maximum number of lighting points in a circuit is


8 points 6 points


10 points 5 points



29.
Which of the material is used for making transformer core?


Steel Cast iron


Aluminium Silicon steel



30.
The. speed of a synchronous motor is


Constant Variable


Absolutely constant 1500 r.p.m



31.
The type of oil used in transformer:


Mineral oil Vegetable oil


Synthetic oil SERVO 40



32.
A synchronous motor with 8 poles and 50 ds frequency will run at


1440 r.p.m 1550 r.p.m


4000 r.p.m 750 r.p.m



33.
Current flowing through a resistance depends on


Only applied voltage


Only value of resistance


Both value of resistance and applied voltage


None of the above



34.
Power factor of an a.c circuit equals


Cosine of phase angle Unity for reactive circuit


Zero for resistive circuit Tangent of phase angle




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35. An open inductive coil has:

1000 ohm resistance Zero resistance


100 ohm resistance Infinitive resistance


36. Power is defined as

Capacity to do a work Rate of doing work


Efficiency to do a work Effect of gravitational force on mass


37. The term LED stands for:

Liquid Emitting Diode Lasor Emitting Diode


Lower Emitting Diode Light Emitting Diode


38. The atomic number of silicon is 14. It means its atom has 14

Valence electrons Neutrons


Electrons Protons and neutrons together


39. The constituents in a solder wire is

Lead and copper Lead and tin


Copper and lead Copper and tin


40. Which semi conductor material is most commonly used for making IC's

Silicon Carbon


Gallium Iodine


41. Which part of an atom determines whether a material is conductor, insulator or semi conductor?

Electrons Protons


Neutrons Valence electrons


42. Transformers are rated in

KW KVA


MW KV


43. The chemical contained in the breather of a transformer:

Calcium carbonate Calcium oxide


Calcium chloride Calcium hydroxide


44. The efficiency of a transformer will be maximum when:

Tron losses are equal to copper losses


Iron losses are more than copper losses


Tron losses are less than copper losses


one of the above


45. Commonly used a.c. Motor in industrial area:

Slipring induction motor Squirrel cage induction motor


Synchronous motor Universal motor


46. The advantage of transistor over vacuum tube is

Transistor operates at lower voltage


Transistor is very small in size


Less losses in the transistor


.All the above


47.
If three resistances ofRI, Rz and R3 are connected in series the total resistance is: W fu+fu+fu fuxfuxfu

48.
The conversion of energy which takes place in thermal power plant:


Solar energy to electrical energy Hydro energy to electrical energy


Heat energy to electrical energy Light energy to electrical energy



49.
Which motor is used in domestic mixy's


Shaded pole motor Universal motor


Slipring motor Capacitor start motor



50.
The unit of impedance is in


Ohm Henry


Siemens Joule



51.
In a star connection the ratio of the line voltage and phase voltage:

1.414 1.732
3 2


52.
The E.M.F of a single dry cell is


2 volts 2.5 volts


2.3 volts CD) 1.5 volts



53.
According to Faraday's law the magnitude of e.m.finduced in a conductor is proportional to


Rate of change of flux The magnitude of voltage


The size of conductor The magnitude of the current



54.
The positive elecrode ofa lead acid battery is made of:


Spongy lead Lead peroxide


Lead sulphate CD) Red lead



55.
In case of electric fire spreads:


Throw water


Throw wet sand


Pour soap water
CD) Use liquid carbon dioxide fire extinguisher




56.
If four incandescent lamps of 100 watts, 60 watts, 40 watts and 25 watts are connected in series with 250 volts supply. Which bulb glows brighter?


60 watts 25 watts


100 watts CD) 40 watts



57.
Why the earth pin of a three pin plug become thicker and longer?


For identifying the earth pin For correct plugging


For reducing resistance CD) All the above



58.
The specific resistance of the electrolyte is measured with:


Hygrometer Hydrometer


Barometer CD) Lactometer



59.
One Horse power is equivalent to


746 watts 735 watts


750 watts CD) 1000 watts



60.
The instrument used for measuring r.p.m of a motor is:


Tong tester Snap on meter


Tachometer Speedometer




6l. Joule's law states that the heat produced in a conductor is proportional to

Voltage Current


Size of conductor Square of the current


62. One B.O.T unit is equivalent to

1 kw/second 1 kw/minute


1 kwh 746 watts


63. The depolorizer used in dry cell is

Manganese dioxide Manganese sulphate


Copper sulphate Ammonium chloride


64. The specific gravity of a fully charged lead acid battery is

1180 1100


1280 1300


65. Which type of bulb is usually used in line testers?

LED Neon


Argon Halogen


66. The abbreviation "L C D" stands for:

Light Crystal Display Logical Crystal Display


Linear Crystal Display Liquid Crystal Display


67. Dielectric strength of insulation is denoted in

Kilo volts Kilo volts/mm


Volts Kilo watts/mm


68. Which rectifier have more efficiency

Full wave bridge rectifier Half wave rectifier


Centre tapped rectifier None of the above



69. A voltmeter is accidently connected in series with 100 watts lamp across 240 V supply. What will be the effect of voltmeter and the bulb?

The lamp will not glow


The voltmeter will not give correct reading


The lamp will give partial glow


The voltmeter will give incorrect reading and the lamp will partially glow


70. NPN transistors are most commonly used than PNP transistors why?

NPN transistors have low cost


NPN transistors have higher switching speed


Easy in ve supply rail


None of the above


71. When a diode is reverse biased the resistance is

<100ohm >100 ohm


>100 Mega ohm Infinitive


72. The material which is not a semi conductor?

Tantallum Telluruim


Selenium Iodine


73. In delta connection of three phase:

Linevoltage =1.732 times ofphasevoltage


Line voltage 3 times of phase voltage


Line voltage and phase voltage are same


Line voltage is 220 volts and phase voltage is 440 volts


74. The ratio of true power to apparent power denotes:

Form factor Power factor


R.M.S value Average value


75. Which of the following instrument takes higher power consumption?

Hot wire instrument Moving coil instrument


Moving iron instrument Integrating type instrument


76. Pure form of semi conductors are named as
Extrinsic semi conductor Doped semi conductor
w
Intrinsic semi conductor None of these
77. A gang capacitor is used in

Filter circuits Voltage stabilizers


Ignition systems Radio and T.V receivers


78. Which metal used in construction of cathodes in vacuum tubes?

Tungsten Molybdenum


Copper Zinc


79. Tong tester is used for measuring:

Voltage


Power


Current without disturbing the circuit or making any connection


Frequency


80. Filter circuit used in electronic devices is for:

Convert AC into D.C


Convert D.C into AC


Purifying the rectifier circuit


Removing the remaining AC content from output of rectifier


81. "The Father of Political Movement" in modern Travancore

N. Narayana Pillai T.K. Madhavan


G. Parameswaran Pillai AK. Pillai


82. The 20th Common Wealth Games was held at:

Glasgow London


Canberra Delhi


83. The first President of the Indian National Congress:
AO. Hume D.E. Wacha
S.N. Banerjee W.C. Banerjee 104/2015 12 A
84. The Brand Ambassador of Telegana state:

M.S. Dhoni .Sania Mirza


p.v. Sindhu CD) Sachin Tendulkar


85. The volunteer captain of the Guruvayoor Satyagraha was:

K. Kelappan T.K. Madhavan


A.K. Gopalan CD) C. Krishnan


86. Misra-bhojanam (inter dining) was popularised in Kerala by

K. Ayyappan Dr. Palpu


C.V. Kunhiraman CD) Pandit Karuppan


87. By which congress session passed the historic resolution, Poorna Swaraj (complete Independence) at

Nagpur Congress Session 1920


Karachi Congress Session 1931


Bombay Congress Session 1942


Lahore Congress Session 1929


88. The Foreign Secretary ofIndia

Nirupama Rao Sujatha singh


Sushama swaraj CD) Meera kumar


89. The first complete census was held in India in 1881 under:

Lord Lytton Lord Mayo


Lord Rippon CD) Lord Dufferin


90. The Apex level agency of'Kudumba Sree' project in Kerala

CDS SSA


RMSA CD) ADS


91. The J:{ourkela Steel Plant in Orissa (Odisha) with the collaboration of:

France Russia


U.K. CD) Germany


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92. Which soil is suitable for the production of cotton?

Alluvial soil Black soil


Red soil Laterite soil


93. "Atma Vidya Sangham" founded by

Swami Vagbhatanda Swami Agamanda


Vaikunda Swamikal Chattambi Swamikal


94. "The Accidental Prime Minister" a book written by

Salman Khurshid M.K. Narayan


T.K.A. Nair Sanjay Baru


95. Part III ofIndian constitution refers:

The Union


The Fundamental Rights


The Union and its territory


Directive Principles and fundamental duties


96. When the Travancore -Cochin states united?

27th July 1947 March 24, 1948


July I" 1949 October 18, 1947


97. Who has been chosen for the Jnanpith award 2013?

Kedarnath Singh Ravuri Bharadwaj


Mahesweta Devi Sugatha kumari


98. Human Rights Day observed on

June 5 October 24


July 11 December 10


99. Which organ is called, "the laboratory of the human body"

heart liver


lungs cerebellum


100. The currency ofSouth Africa:

Real Rand


Rouble Renminibi Yuan