Previous Exams

Tradesman-Wireman (Technical Education) - 2016

 

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

Halved

Remains same

Four times more
2. Which one of the following is called as valance electron in an atom?
No.of electrons in inner orbit

No.of electrons in the N shell

No.of electrons in the outer most orbit

No.of electrons in the M shell
3. Interpoles are connected in:
Series with armature

Series with field

Parallel with armature

None of these
4. In three phase delta connection,line voltage is
Square root of 3 Vph

Vph/Square root of 3

Same as phase voltage

Same as line current
5. Cells are connected in series to get:
More voltage

More current

More power

None of these
6. No load test on a transformer is conducted to measure:
Copper loss

Core loss

Total loss

Efficiency
7. 1 micro ohm is -----------ohm.
1/1000000

1/100000

1/10000

1/1000
8. In SI unit one coloumb of electricity corresponds to a quantity of electrons about:
6.24 x 10

6.24 x 10

62.4 x 10

62.4 x 10
9. Which of the following does not depend on the resistance of a conductor?
Length

Material

Voltage

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

Aluminium

Tungsten

Carbon
11. How many 6 volt lamps are required to make a decorative serial set of operating voltage of 240 V?
38

40

42

36
12. What is the use of Eureka wire?
Rheostat

Heating element

Earth wire

Winding wire
13. Which is not a property of an insulator?
High heat conductivity

High permittivity

High dielectric strength

High mechanical strength
14. In Leclanche cell manganese dioxide acts as:
Positive electrode

Negative electrode

Depolarizer

Electrolyte
15. Positive electrode in a dry cell is:
Zinc

Copper

Carbon

None of these
16. In a lead acid battery 6 positive electrodes are there.The numbers of negative plates are:
4

5

7

8
17. The capacity of the storage battery is expressed in:
Voltage rating

Ampere rating

Ampere-hour rating

None of these
18. Permanent magnets are made from:
Soft iron piece

Alnico

Nichrome

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

Paramagnetic

Diamagnetic

Ferromagnetic
20. The unit of magnetic reluctance is:
Ampere-turns

Weber/m2

Ampere turns/Weber

None of these
21. Tesla is the unit of:
Flux

Flux density

MMF

Reluctance
22. The rule used to determine the direction of induced current in a dc generator:
Fleming’s left hand rule

Lenz’s law

Right hand thumb rule

Fleming’s right hand rule
23. Split rings are made from:
Gun metal

Brass

Hard drawn copper

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

Armature winding

Shunt field winding

None of these
25. The dc generator used for welding purpose is:
Cumulative compound

Shunt

Differential compound

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

Long shunt motor

Series motor

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

Starting resistor

Over load relay

Shunt field
28. Ward-Leonrd system of speed control is used in dc shunt motor to get:
Above normal speed only

Below normal speed only

From zero to desired value

Normal constant speed
29. The fuse unit is made from:
Bakelite

Porcelain

Ceramic

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

Married joint

Western union joint

Aerial tap joint
31. As Per IE Rules how much load is permitted in a power sub circuit:
2500 W

4000 W

3000 W

5000 W
32. The colour used for neutral wire in supply system is:
Blue

Yellow

Black

Green
33. The recommended length of pipe used as earth electrode is:
Not less than 2.25 m

Not less than 2.5 m

Not less than 2 m

None of these
34. The size of the plate used for earthing electrode is:
60 cm x 60 cm

50 cm x 50 cm

45 cm x 45 cm

40 cm x 40 cm
35. The test used to check whether the switches are connected in live wire or not is:
Continuity test

Earth test

Polarity test

Insulation test
36. 2 pin sockets should not be used in domestic wiring unless the appliance to be connected is:
Double earthed

Double insulated

Controlled by ELCB

Controlled by MCB
37. IRMS value is equal to:
0.637 IMAX

0.707 IMAX

6.37 Imax

7.07 Imax
38. Form factor of a sinusoidal wave is:
11.1

1.11

0.111

None of these
39. The unit of inductive reactance is:
Henry

Ohm

Ampere turn

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

120 degree

180 degree

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

Choke

Capacitor

All of these
42. In which load power factor may be unity?
Inductive reactance with resistance

Non inductive resistance

Capacitive reactance

None of these
43. The reciprocal of impedance is:
Susceptance

Conductance

Admittance

Inductance
44. The effect of low power factor in an electrical system is:
Efficiency will be more

Current will be increased

Current will be reduced

None of these
45. In a 3 phase system voltage across phase to phase is called:
Phase voltage

Line voltage

EMF

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

210 V

220 V

240 V
48. The number of slip rings required for a rotating field type 3 phase alternator is:
2

3

12

6
49. Alterantors are rated in:
KW

KVA

HP

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

Half load

Full load

All load
52. Condition for maximum efficiency of a transformer is:
Copper loss is equal to iron loss

Copper loss is more than iron loss

Copper loss is zero

None of these
53. The full load copper loss in a transformer is 900 watts.What will be the copper loss at half load?
1300 W

500 W

225 W

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

Transformer oil

Windings

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

110 V

200 V

75 V
56. The direction of rotation of stator magnetic field depends up on:
Supply Voltage

Phase sequence of the supply

Type of stator winding

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

Increases

Remains constant

Zero
58. Inching operation is also called as:
Starting

Braking

Stopping

Jogging
59. How many contactors are there in a fully automatic star delta starter?
1

3

4

6
60. The device used to store electrical energy in the form of electro static energy is:
Inductor

Resistor

Thermistor

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

Ceramic Capacitor

Disc Capacitor

Mica Capacitor
62. Universal motor is used in:
Fan

Refrigerator

Jet Pump

Food mixer
63. The unit of sensitivity of meter is:
Volt/ohm

Amp/Ohm

Ohm/amp

Ohm/volt
64. Control spring used in an instrument is made from:
Bronze

Copper

Phospheric bronze

Brass
65. The unit of luminous flux is:
Candela

Lux

Lumen

Lumen/watt
66. In the following which is not a passive component?
Resistor

Capacitor

Transistor

Inductor
67. Which element is used as semiconductor material?
Copper

Plastic

Silicon

Brass
68. What is the abbreviation of PILC cable?
Paper Insulated Length Core

Polymer Insulated Lead Core

Paper Insulated Lead Covered

None of these
69. The size of the ceiling fan is generally expressed by its:
Number of blades

Pitch angle

Length of the blade

Sweep
70. Line insulators are made from:
Mica

Porcelain Clay

Granite

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

Water

Foam

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

Long nose pliers

Round nose pliers

Long nose pliers
73. When temperature of carbon increases,its resistance?
Decreases

Increases

Remains same

None of these
74. The specification of a given screwdriver is (75 mm x 0.4 mm x 2.5 mm)0.4 mm stands for.
Length

Thickness of tip of blade

Diameter

Handle length
75. The unit of Specific resistance is:
Ohm-meter

Ohm/meter

Ohm

None of these
76. The unit of dielectric strength is:
kV/mm

kW/mm

Ohm/mm

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

625 Ohms

6250 Ohms

325 Ohms
81. Alathur Sidhasramam was founded by:
Sree Narayana Guru

Brahmananda Sivayogi

Chattambi Swami

Kumara Guru
82. Prathyaksha Raksha Daiva Sabha was founded by:
Pambadi John Joseph

M.C.Joseph

Poikayil Yohannan

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

K.Ayyappan

Pandit Karuppan

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

G.P.Pillai

KP.Sankara Menon

KP.Kesava Menon
85. The play ‘Adukkalayil Ninnu Arangathekku’exposed the condition of women among
Nairs

Pulayas

Ezhavas

Nambuthiris
86. The present Vice Chairman of ‘Niti Ayog’
Aravind Pangariya

Radha Mohan Singh

Bibek Debroy

Prabhat Patnaik
87. Vyapam Scam is an admission and recruitment scam in the state of-------------------
Uttar Pradesh

Madhya Pradesh

Rajasthan

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

Argentina

Chile

Uruguay
89. The famous scientist Stephen Hawking belonged to:
America

Germany

France

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

Alice Munro

Patrick Modiano

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

10.30 AM

11 AM

12.30 PM
92. The number of Union Territories in India:
7

8

9

10
93. Which of the following states have no coastline?
Gujarat

Maharashtra

Rajasthan

Karnataka
94. 14th Indian Census conducted in the year:
2001

1981

1991

2011
95. Who is known as the ‘Grand Old Man of India’?
Gopala Krishna Gokhale

Bala Gangadhar Tilak

Lala Lajpat Rai

Dadabhai Naoroji
96. ’Discovery of India’is authored by:
R.P.Dutt

R.C.Dutt

V.D.Savarkar

Jawaharlal Nehru
97. The first women president of Indian National Congress:
Annie Besant

Sarojini Naidu

Indira Gandhi

Sonia Gandhi
98. The historic ‘Dandi March’was in connection with:
Non Co-operation Movement

Quit India Movement

Khilafat Movement

Civil Disobedience Movement
99. Which among the following is an east-flowing river in Kerala?
Periyar

Pambar

Chaliyar

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

Kasaragod

Kannur

Kozhikode