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