TRADESMAN-WIREMAN(TECHNICAL EDUCATION) 26-02-2016 KERALA PSC SOLVED PAPER

TRADESMAN-WIREMAN(TECHNICAL EDUCATION)

EXAM DATE:26-02-2016

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1.If the area of a metal wire of a given  length is doubled,its resistance will be:

A.Doubled

B.Halved*

C.Remains same

D.Four times more

Ans:B

2.Which one of the following is called as valance electron in an atom?

A.No.of electrons in inner orbit

B.No.of electrons in the N shell

C.No.of electrons in the outer most orbit*

D.No.of electrons in the M shell

Ans:C

3.Interpoles  are connected in:

A.Series with armature*

B.Series with field

C.Parallel with armature

D.None of these

Ans:A

4.In three phase delta connection,line voltage is

A.Square root of 3 V_p^h

B.V_p^h/Square root of 3

C.Same as phase voltage*

D.Same as line current

Ans:C

5.Cells are connected in series to get:

A.More voltage*

B.More current

C.More power

D.None of these

Ans:A

6.No load test on a transformer is conducted to measure:

A.Copper loss

B.Core loss*

C.Total loss

D.Efficiency

Ans:B

7.1 micro ohm is -----------ohm.

A.1/1000000*

B.1/100000

C.1/10000

D.1/1000

Ans:A

8.In SI unit one coloumb  of electricity corresponds to a quantity of electrons about:

A.6.24 x 10¹⁸*

B.6.24 x 10⁸

C.62.4 x 10⁸

D.62.4 x 10¹⁸

Ans:A

9.Which of  the following does not depend on the resistance of a conductor?

A.Length

B.Material

C.Voltage*

D.Temperature

Ans:C

10.Which of the following material have negative temperature coefficient of resistance?

A.Copper

B.Aluminium

C.Tungsten

D.Carbon*

Ans:D

11.How many 6 volt lamps are required to make a  decorative serial set of operating voltage of 240 V?

A.38

B.40*

C.42

D.36

Ans:B

12.What is the use of Eureka wire?

A.Rheostat*

B.Heating element

C.Earth wire

D.Winding wire

Ans:A

13.Which is not a property of an insulator?

A.High heat conductivity

B.High permittivity*

C.High dielectric strength

D.High mechanical strength

Ans:B

14.In Leclanche cell manganese dioxide acts as:

A.Positive electrode

B.Negative electrode

C.Depolarizer*

D.Electrolyte

Ans:C

15.Positive electrode in a dry cell is:

A.Zinc

B.Copper

C.Carbon*

D.None of these

Ans:C

16.In a lead acid battery 6 positive electrodes are there.The numbers of negative plates are:

A.4

B.5

C.7*

D.8

Ans:C

17.The capacity of the storage battery is expressed in:

A.Voltage rating

B.Ampere rating

C.Ampere-hour rating*

D.None of these

Ans:C

18.Permanent magnets are made from:

A.Soft iron piece

B.Alnico*

C.Nichrome

D.Graphite

Ans:B

19.The material slightly repelled by a magnet is called:

A.Magnetic

B.Paramagnetic

C.Diamagnetic*

D.Ferromagnetic

Ans:C

20.The unit of magnetic reluctance is:

A.Ampere-turns

B.Weber/m²

C.Ampere turns/Weber*

D.None of these

Ans:C

21.Tesla is the unit of:

A.Flux

B.Flux density*

C.MMF

D.Reluctance

Ans:B

22.The rule used to determine the direction of induced current in a dc generator:

A.Fleming’s  left hand rule

B.Lenz’s law

C.Right hand thumb rule

D.Fleming’s right hand rule*

Ans:D

23.Split rings are made from:
A.Gun metal

B.Brass

C.Hard drawn copper*

D.Bronze

Ans:C

24.The winding have many turns of thin wire in dc generator is:

A.Series field winding

B.Armature winding

C.Shunt field winding*

D.None of these

Ans:C

25.The dc generator used for welding purpose is:

A.Cumulative compound

B.Shunt

C.Differential compound *

D.Series

Ans:C

26.The type of dc motor used for traction purpose is:

A.Shunt motor

B.Long shunt motor

C.Series motor*

D.Short shunt motor

Ans:C

27.The connection of no volt coil in dc 3 point starter across dc supply is in series with:

A.Armature

B.Starting resistor

C.Over load relay

D.Shunt field*

Ans:D

28.Ward-Leonrd system of speed control is used in dc shunt motor to get:

A.Above normal speed only

B.Below normal speed only

C.From zero to desired value*

D.Normal constant speed

Ans:C

29.The fuse unit is made from:

A.Bakelite

B.Porcelain*

C.Ceramic

D.Iron

Ans:B

30.The joint used in over head lines for extending the length is:

A.Rat tail joint

B.Married joint*

C.Western union joint

D.Aerial tap joint

Ans:B

31.As Per IE Rules how much load is permitted in a power sub circuit:

A.2500 W

B.4000 W

C.3000 W*

D.5000 W

Ans:C

32.The colour used for neutral wire in supply system is:

A.Blue

B.Yellow*

C.Black

D.Green

Ans:B

33.The recommended length of pipe used as earth electrode is:

A.Not less than 2.25 m

B.Not less than 2.5 m*

C.Not less than 2 m

D.None of these

Ans:B

34.The size of the plate used for earthing electrode is:

A.60 cm x 60 cm*

B.50 cm x 50 cm

C.45 cm x 45 cm

D.40 cm x 40 cm

Ans:A

35.The test used to check whether the switches are connected in live wire or not is:

A.Continuity test*

B.Earth test

C.Polarity test

D.Insulation test

Ans:A

36.2 pin sockets should not be used in domestic wiring unless the appliance  to be connected is:

A.Double earthed

B.Double insulated

C.Controlled by ELCB

D.Controlled by MCB*

Ans:D

37.I_RMS value is equal to:
A.0.637 IMAX

B.0.707 IMAX*

C.6.37 Imax

D.7.07 Imax

Ans:B

38.Form factor of a sinusoidal wave is:

A.11.1

B.1.11*

C.0.111

D.None of these

Ans:B

39.The unit of inductive reactance is:

A.Henry

B.Ohm*

C.Ampere turn

D.Susceptance

Ans:B

40.The phase difference between any two adjacent phases in a three phase system is:

A.90⁰

B.120⁰*

C.180⁰

D.360⁰

Ans:B

41.To provide inductance in a circuit which is used?

A.Resistor

B.Choke*

C.Capacitor

D.All of these

Ans:B

42.In which load power factor may be unity?

A.Inductive reactance with resistance

B.Non inductive resistance*

C.Capacitive reactance

D.None of these

Ans:B

43.The reciprocal of impedance is:

A.Susceptance

B.Conductance

C.Admittance*

D.Inductance

Ans:C

44.The effect of low power factor in an electrical system is:

A.Efficiency will be more

B.Current will be increased*

C.Current will be reduced

D.None of these

Ans:B

45.In a 3 phase system voltage across phase to phase is called:

A.Phase voltage

B.Line voltage*

C.EMF

D.Terminal voltage

Ans:B

46.Line voltage of a star connected 3 phase circuit is 415 V.The phase voltage will be:

A.415 V

B.210 V

C.220 V

D.240 V*

Ans:D

47.The formula for reactive power in a 3 phase system is:

A.3 V_LI_LCos(Theta)

B.Square root of 3 V_LI_LCos(Theta)

C.Square root of 3 V_LI_LSin(Theta)*

D. Square root of 3 V_pI_pSin(Theta)

Ans:C

48.The number of slip rings required for a rotating field type 3 phase alternator is:

A.2*

B.3

C.12

D.6

Ans:A

49.Alterantors are rated in:

A.KW

B.KVA

C.HP*

D.KVAR

Ans:C

50.The speed of 6 pole  60 Hz alternator is:

A.600 rpm

B.1200 rpm*

C.1800 rpm

D.800 rpm

Ans:B

51.Core loss in a transformer is constant during:
A.Quarter load

B.Half load

C.Full load

D.All load*

Ans:D

52.Condition for maximum efficiency of a transformer is:

A.Copper loss is equal to iron loss*

B.Copper loss is more than iron loss

C.Copper loss is zero

D.None of these

Ans:A

53.The full load copper loss in  a transformer is 900 watts.What will be the copper loss at half load?

A.1300 W

B.500 W

C.225 W*

D.450 W

Ans:C

54.In which part of a transformer hysteresis loss will occur?

A.Core*

B.Transformer oil

C.Windings

D.Conservator

Ans:A

55.The standard secondary rated voltage of a potential transformer is:

A.150 V

B.110 V*

C.200 V

D.75 V

Ans:B

56.The direction of rotation of stator magnetic field depends up on:

A.Supply Voltage

B.Phase sequence of the supply

C.Type of stator winding*

D.All of these

Ans:C

57.When speed of induction motor increases the rotor frequency will?

A.Decreases*

B.Increases

C.Remains constant

D.Zero

Ans:A

58.Inching operation is also called as:
A.Starting

B.Braking

C.Stopping

D.Jogging*

Ans:D

59.How many contactors are there in a fully automatic star delta starter?

A.1
B.3*

C.4

D.6

Ans:B

60.The device used to store electrical energy in the form of electro static energy is:

A.Inductor

B.Resistor

C.Thermistor

D.Capacitor*

Ans:D

61.The type of capacitor used in capacitor start motor is:

A.Electrolytic capacitor

B.Ceramic Capacitor

C.Disc Capacitor

D.Mica Capacitor*

Ans:D

62.Universal motor is used in:

A.Fan

B.Refrigerator

C.Jet Pump

D.Food mixer*

Ans:D

63.The unit of sensitivity of meter is:

A.Volt/ohm

B.Amp/Ohm

C.Ohm/amp

D.Ohm/volt*

Ans:D

64.Control spring used in an instrument is made from:

A.Bronze

B.Copper

C.Phospheric bronze*

D.Brass

Ans:C

65.The unit of luminous flux is:

A.Candela

B.Lux

C.Lumen*

D.Lumen/watt

Ans:C

66.In the following which is not a passive component?

A.Resistor

B.Capacitor

C.Transistor*

D.Inductor

Ans:C

67.Which element is used as semiconductor material?

A.Copper

B.Plastic

C.Silicon*

D.Brass

Ans:C

68.What is the abbreviation of PILC cable?

A.Paper Insulated Length Core

B.Polymer Insulated Lead Core

C.Paper Insulated Lead Covered*

D.None of these

Ans:C

69.The size of the ceiling fan is generally expressed by its:

A.Number of blades

B.Pitch angle

C.Length of the blade

D.Sweep*

Ans:D

70.Line insulators are made from:

A.Mica

B.Porcelain Clay*

C.Granite

D.Asbestos

Ans:B

71.Which of the following fire extinguisher is suitable for a live electrical fire?

A.Halon*

B.Water

C.Foam
D.Liquefied chemical

Ans:A

72.The pliers used to make wire hooks and loops is:

A.Combination pliers

B.Long nose pliers*

C.Round nose pliers

D.Flat nose pliers

Ans:B

73.When temperature of carbon increases,its resistance?

A.Decreases*

B.Increases

C.Remains same

D.None of these

Ans:A

74.The specification of a given screwdriver is (75 mm x 0.4 mm x 2.5 mm)0.4 mm stands for.

A.Length

B.Thickness of tip of blade*

C.Diameter

D.Handle length

Ans:B

75.The unit of Specific resistance is:

A.Ohm-meter*

B.Ohm/meter

C.Ohm

D.None of these

Ans:A

76.The  unit of dielectric strength is:

A.kV/mm*

B.kW/mm

C.Ohm/mm

D.Ampere

Ans:A

77.The resistance of 100W,250V electric lamp is:

A.62.5 Ohms

B.625 Ohms

C.6250 Ohms

D.325 Ohms

Ans:-----

78.Three 30 ohms resistors are connected in parallel.The effective resistance of the combination will be:

A.10 Ohms*

B.90 Ohms

C.25 Ohms

D.15 Ohms

Ans:A

79.Three resistors 27 ohms,47 ohms and 68 ohms are connected in parallel.What is the total resistnace?

A.Less than 27 ohms*

B.Greater than 68 ohms

C.Between 27 and 47 ohms

D.None of these

Ans:A

80.The type of watt meter suitable to measure DC power is:
A.Induction type

B.Dynamo meter type*

C.LPF type

D.None of these

Ans:B

81.Alathur Sidhasramam was founded by:

A.Sree Narayana Guru

B.Brahmananda Sivayogi*

C.Chattambi Swami

D.Kumara Guru
Ans:B

82.Prathyaksha Raksha Daiva Sabha was founded by:

A.Pambadi John Joseph

B.M.C.Joseph

C.Poikayil Yohannan*

D.Abraham Malpan

Ans:C

83.’Misrabhojanam’or interding was a method introduced by:

A.Ayyankali

B.K.Ayyappan*

C.Pandit Karuppan

D.Vagbhadananda

Ans:B

84.The ‘Ezhava Memorial’was prepared under the leadership of:

A.Dr.Palpu*

B.G.P.Pillai

C.KP.Sankara Menon

D.KP.Kesava Menon

Ans:A

85.The play ‘Adukkalayil Ninnu Arangathekku’exposed the condition of women among

A.Nairs

B.Pulayas

C.Ezhavas

D.Nambuthiris*

Ans:D

86.The present Vice Chairman of ‘Niti Ayog’

A.Aravind Pangariya*

B.Radha Mohan Singh

C.Bibek Debroy

D.Prabhat Patnaik

Ans:A

87.Vyapam Scam is an admission and recruitment scam in the state of-------------------

A.Uttar Pradesh

B.Madhya Pradesh*

C.Rajasthan

D.Gujarat

Ans:B

88.The Copa America Football tournament 2015 was held in:

A.Brazil

B.Argentina

C.Chile*

D.Uruguay

Ans:C

89.The famous scientist Stephen Hawking belonged to:

A.America

B.Germany

C.France

D.England*

Ans:D

90.The 2014 Nobel Prize for literature was won by:

A.Mo Yan

B.Alice Munro

C.Patrick Modiano*

D.Thomas Transtromer

Ans:C

91.When the time in India is 10.30 AM,the time of Sri Lanka is?

A.10 AM

B.10.30 AM*

C.11 AM

D.12.30 PM

Ans:B

92.The number of Union Territories in Indi:

A.7*

B.8

C.9

D.10

Ans:A

93.Which of the following states have no coastline?

A.Gujarat

B.Maharashtra

C.Rajasthan*

D.Karnataka

Ans:C

94.14^th Indian Census conducted in the year:

A.2001*

B.1981

C.1991

D.2011

Ans:A

95.Who is known as the ‘Grand Old Man of India’?

A.Gopala Krishna Gokhale

B.Bala Gangadhar Tilak

C.Lala Lajpat Rai

D.Dadabhai Naoroji*

Ans:D

96.’Discovery of India’is authored by:

A.R.P.Dutt

B.R.C.Dutt

C.V.D.Savarkar

D.Jawaharlal Nehru*

Ans:D

97.The first women president of Indian National Congress:

A.Annie Besant*

B.Sarojini Naidu

C.Indira Gandhi

D.Sonia Gandhi

Ans:A

98.The historic ‘Dandi March’was in connection with:

A.Non Co-operation Movement
B.Quit India Movement

C.Khilafat Movement

D.Civil Disobedience Movement*

Ans:D

99.Which among the following is an east-flowing river in Kerala?

A.Periyar

B.Pambar*

C.Chaliyar

D.Pamba

Ans:B

100.The Ezhimala Naval Academy is  located in the district of:

A.Thrissur

B.Kasaragod

C.Kannur*

D.Kozhikode

Ans:C