Previous Exams

Tradesman-Wireman-2016

 

Time Remaining :
1. What is the unit of Magneto Motive Force?
Volt

Ampere

Ampere-turns

Weber
2. Whenever the magnetic flux linking with a conductor changes,an e.m.f is induced in that conductor.The above statement is due to:
Weber and Ewing’s law

Faraday’s law or electrolysis

Coloumb’s law

Faraday’s law of electromagnetic induction
3. According to Steinmentz Hystersis law,the hysteresis lose in a material is proportional to:
Answer1

Answer2

Answer3

Answer4
4. Which of the following is not a diamagnetic material?
Air

Water

Glass

Sulphur
5. Which series MCBs are designed to protect circuits with inductive loads?
L series MCB

G series MCB

AC series MCB

DC series MCB
6. Out of the four metal/alloys given below,one has almost no change in resistance for change in temperature:
Nickel

Nichrome

Manganin

Platinum
7. As per the recommendation of BIS and NEC,the minimum clearance between the ceiling and the plane of the blades of the ceiling fan shall not be less than:
300 mm

1300 mm

2400 mm

200 mm
8. To control one lamp from three places we use:
3 one way switches

2 two way switches and 1 one way switch

3 two way switches

2 two way switches and 1 intermediate switch
9. In simple voltaic cell,zinc plate is amalgamating with mercury to prevent:
Local action

Polarization

Buckling

Sulphation
10. In a parallel plate capacitor,if a dielectric slab is introduced,the p.d. between plates will:
Ramains the same

Decrease

Increase

Becomes zero
11. Number of light points admissible in one circuit are:
4 points of 400 w each

8 points of 200 w each

12 points of 60 w each

8 points of 100 w each
12. Bayonet Cap lamp holders cannot be used for lamps having wattage rating more than:
60 w

100 w

200 w

1000 w
13. Other than Nichrome,which of the following materials are used as heating element?
Tungsten

Kanthal

Porcelain

Mica
14. One Calory is equal to:
4187 joules

41.87 joules

418.7 joules

4.187 joules
15. A 1 KW,230 V kettle is connected to 15 A plug socket using a power cord rated to carry 15 amperes.What should be the fuse rating of this appliance circuit?
6 amps

4 amps

10 amps

15 amps
16. A heater with short-circuited heating element is tested with a series test lamp,the test lamp will:
Glow brightly

Glow dim

Glow normally

Not glow
17. The unit of luminous intensity is:
Candela

Staradian

Lux

Lumen
18. The purpose of a resistor connected in series with the heating element of an automatic electric iron is to:
Control the current through the heating element

Apply low voltage to pilot lamp

Give safety for the thermostat

Control the heat
19. In batten wiring,the distance between link clips in vertical runs shall not exceed:
5 cm

10 cm

12 cm

15 cm
20. The process by which an emf induced in a DC generator is known as__________method
Static

Dynamic

Mutual induction

Self induction
21. Testing a wiring installation for insulation resistance is to ensure that:
All conductors have high ohmic value in the circuit

All outlet point are earthed properly to ground

Leakage current beyond the stipulated values does not flow to earth

Live and neutral conductors in the installation are continuous
22. In this wiring,to operate 3 lamps in all we require 6 two way switches:
Corridor wiring

Godown wiring

Tunnel wiring

Hostel wiring
23. Fleming’s Right hand rule is used to identify the:
Direction of current in a motor

Direction of rotation in a generator

Direction of rotation in a motor

Direction of induced emf
24. To get sinusoidal wave shape of an alternating current:
Coil should rotate under uniform field

Coil should rotate under more number of poles

Tow slip rings must be used

Armature should have more number of coils
25. In a DC machine,the conductors of the armature windings are soldered to commutator at the:
Segment internally

Riser

Segments directly

Brushes
26. The inter poles are connected in a dc generator
In series with armature and of same polarity ahead of approaching pole

In series with armature and of opposite polarity ahead or approaching pole

In parallel with armature and of same polarity ahead of approaching pole

In parallel with armature and of opposite polarity ahead of approaching pole
27. If different quantities of water are heated for the same time by the same capacity heaters,then the temperature developed at the :
Larger quantity of water will have a higher temperature than the smaller quantity of water

Smaller quantity of water will have a higher temperature than the larger quantity of water

Larger quantity of water will have the same temperature than the smaller quantity of water

None of the above
28. The meter used to measure the temperature of furnace is:
Thermometer

Thermostat

Hygrometer

Pyrometer
29. Resistors of 5 ohms,5 kilo ohms,50 kilo ohms,5 mega ohms are connected in parallel.Their equivalent resistance will be very near to:
4.5 ohms

4.5 kilo ohms

45 kilo ohms

4.5 mega ohms
30. A substance that has low retentivity can be used for the manufacture of:
Electromagnets

Permanent magnets

Bar magnets

Paramagnets
31. When the fluorescent lamp is switched ON there is some vibrating sound from the choke.This is due to loose:
Connection in the choke

Winding turns

Core

Screws in the cover
32. How big is the peak amplitude of a sine-wave with an effective value of 220 volts?
440 V

400 V

380 V

311 V
33. Which type of formula may be used for any type of circuit?
Answer1

Answer2

Answer3

Answer4
34. In a capacitive AC circuit the:
Current lags voltage

Voltage leads current

Voltage lags current

Voltage is in phase with current
35. In a RL parallel circuit,the opposition to total current is called:
Reactance

Impedance

Resistance

A vector sum
36. A 4 pole simplex lap-wound armature having 48 slots,each slot has 4 conductors and each conductor is having resistance of 0.1 ohm.What will be the total armature resistance?
0.48ohm

1.2 ohms

1.92 ohms

4.8 ohms
37. Speed of DC shunt motor has to be controlled through the field.Which starter is most suitable in this case?
4 point starter

3 point starter

2 point starter

DOL starter
38. A very low value of insulation resisatnce indicates:
Good operating condition

Fair operating condition

An immediate investigation

That the measuring instrument is wrong
39. The magnetic field produced in the stator of a 3 phase induction motor travel at:
Rotating speed

Asynchronous speed

Synchronous speed

Slip speed
40. The motor which requires least maintenance is:
Squirrel cage induction motor

Slip ring induction motor

DC series motor

DC shunt motor
41. When testing the shunt winding of a DC machine for continuity with test lamp of high wattage,the prods when touched on shunt field terminals give spark.What is the reason?
Shunt field winding is grounded

Shunt field winding is open circuited

Shunt field winding has low resistance

Shunt field winding has high resistance
42. The main function of NVC generally used with a motor starter is to:
Open the main contacts of the starter on failure or reduction of input voltage and automatically reclose it on return of normal voltage

Open the main contacts of the starter on failure or reduction of input voltage and keep it open until manually closed

Control motor voltage and keep it at the rated value

Prevent the main contact of the starter from opening when flunctuations occur in the power system
43. Eyre No.7 is:
Copper soldering flux

Aluminium solder

Copper solder

Aluminium soldering flux
44. In a DOL starter,a NVC is connected across a phase and neutral of a three phase,415 V,50Hz supply and works normally.Then the rating of the NVC ought to be:
415 V,50 Hz AC

400 V,50 Hz AC

240 V,50 Hz AC

200 V,50 Hz AC
45. The starting current of a 220 V,10 HP shunt motor having armature:resistance of 0.2 ohms without starter is:
11A

1100A

110A

11000A
46. In a DC generator,if the field circuit resistance is more than field critical resistance,then the
Field coils will burn

Generator will build of max,voltage

Generator will generate up max power

Generator will not build up voltage
47. Metric Horse Power is equal to:
746 W

736 W

756 W

1000 W
48. When remote ON and OFF are used,the remote ON button should be connected with the existing ON button:
In series

In parallel

In series and parallel

Bridge circuit formation
49. While running,the rotor frequency in a 3 phase induction motor is equal to:
Starter frequency

Starter frequency/slip

Starter frequency*slip

Starter frequency+slip
50. When a single phase supply is connected across single phase winding of motor,the nature of magnetic field produced is:
Constant in magnitude and direct ion

Alternating in nature

Constant in magnitude but rotating at synchronous speed

Pulsating in nature
51. When remote push buttons are used START push buttons are wired in_________and STOP push buttons are wired in___________in a starter control circuit.
Series,Series

Series,parallel

Parallel,series

Parallel,parallel
52. In a manual star-delta starter the stop button connection is in series with the:
No volt coil

No volt coil and overload relay contacts

Overload relay contacts

No volt coil and start button
53. After repeated melting of solder,to compensate the loss,it is necessary to add—to the solder
Zinc

Lead

Flux

Tin
54. While measuring unknown voltage with a multimeter,it is recommended to select the ___________ range available.
Most lowest

Lowest

Middle

Highest
55. The shunt type ohm meter will have zero reading at the:
Centre of the scale

Right hand end of the scale

Left hand end of the scale

Anywhere according to manufacturer
56. A panel type voltmeter with a pen moving on a graph comes under the category of:
Absolute instrument-indicating type

Secondary instrument-indicating type

Secondary instrument-integrating type

Secondary instrument-recording type
57. PMMC ammeter have uniform scale because:kjfmhhg
Of eddy current damping

They are spring controlled

The deflecting torque varies directly as the current

Both A and C
58. The control force employed in an indicating instrument which can be kept in any position is:
Gravity control

Spring control

Fluid friction control

Hydraulic friction control
59. Most of the accidents happened while chipping due to:
Loose hammer handle

Mushroom head chisel

Failure to use chip guard

Any one of the above
60. A tong tester in an instrument having a:
Current transformer

Potential transformer

Current transformer with an ammeter

Potential transformer with a voltmeter
61. A coolant is used for cooling the:
Machine

Job only

Cutting tool

Hot chips
62. As compared to an amplifier,a transformer cannot:
Increase the output power

Increase the output voltage

Increase the output current

Perform none of these
63. Crackle test on transformer oils is conducted to find out the presence of:
Air

Water

Gas

Oxide
64. Diversity factor is the ratio between minimum actual load and:
Combined load

Expected load

Maximum load

None of the above
65. A thermistor is a device whose resistance:
Reduce as temperature increases

Increases as temperature increases

Produce as temperature reduces

Remain constant at all temperatures
66. The shape and colour of mandatory sign is:
Circular shape-black symbol on yellow background

Circular shape-white symbol on blue background

Square shape-green symbol on white background

Triangular shape-black symbol on blue background
67. Open circuit test should be conducted before the __________to make sure that the complete circuit included in the test
Insulation test

Ground test

S.C.Test

O.C.Test
68. Which tool is not used for making pilot holes on wooden/metal article?
Center punch

Bradawl

Pocker

Rawal plug tool
69. Which effect of electric current is used in electric motors?
Chemical effect

Magnetic effect

Heating effect

Shock effect
70. The method of fire extinguishing by isolating the fire from the supply of oxygen by blanketing it is known as:
Smothering

Starving

Accumulation

Cooling
71. What does S.W.G.Stands for?
Standard Western Gauge

Swiss Wire Gauge

Swiss Western Gauge

Standard Wire Gauge
72. Combination pliers are not used for:
Cutting

Twisting

Hammering

Holding
73. Armouring is provided in the cables to safeguard against:
Moisture entry

White ant

Bursting of failure

Mechanical injury
74. The floats used in the Buchholz relay is operated by:
Mercury switches

Iron clad switches

Centrifugal switches

Flush mounting switches
75. A source of e.m.f is required in order to:
Prevent the escape of electrons

Insulate the electrons from the unbalanced atoms

Get the electrons into motion

Change the property of conductance into resistance
76. Three resistors are connected in series across a 27 V supply.The second resistor has twice the resistance of the first,the resistor has three times the resistance of the second.The voltage across the
18V

6V

9V

3V
77. According to Fleming’s L.H.R.the angle between the thumb,middle finger and forefinger must be:
180degree between any two

Right angle between any two

All must be 45degree apart

Mutually at right angle each other
78. The standard supply frequency in India is:
60 c/s

50 c/s

55 Hz

45 c/s
79. Luminous efficiency of a fluorescent Tube is:
30 lumen/watt

40 lumen/watt

60 lumen/watt

80 lumen/watt
80. If two capacitors having capacitance C,and C,are connected in series,then the total capacitance(CT)of the circuit is:
Answer1

Answer2

Answer3

Answer4
81. Creation of Micro Units Development Refinance Agency(MUDRA)Bank was announced with the corpus or:
10000 Crores

20000 Crores

1000 Crores

500 Crores
82. Where was the 12th South Asian Games held?
Guwahati and Shillong

New Delhi

Bengaluru

Hydrabad
83. National Girl Child Day was observed on:
February 10

February 20

January 24

January 20
84. Which city has been declared the cleanest city in India,as per the Swachh Bharat Ranking?
Chandigarh

Thiruvanathapuram

Delhi

Mysore
85. Which State is declared as the first digital state in India?
Karnataka

Kerala

Maharashtra

Gujarath
86. The largest producer of saffron in India:
Jammu and Kashmir

Uttar Pradesh

Tamilnadu

Hariyana
87. Aishwarya Oil field is located in which state of India?
Gujarath

Maharashtra

Rajasthan

Andhrapradesh
88. Which one of the state is not covered by western Ghats?
Kerala

Maharashtra

Goa

Andhrapradesh
89. By eradicating poverty who wished to 'wipeout every tear from every eye'
Mahathma Gandhi

Jawaharlal Nehru

Indira Gandhi

Rabindranath Tagore
90. Which country is separated from British India by Durand Line?
Pakistan

Afghanistan

China

Nepal
91. Who is known as the ‘Father or Indian unrest’?
Bala Gangadhar Tilak

Bipin Chandra Pal

Lala Lajapat Rai

Aurobindo Ghosh
92. The Jallian wala Bagh Massacre took place during the viceroyalty of:
Lord Ripon

Lord Canning

Lord Canning

Lord Chelmsford
93. The National Highway No.8 connects:
Varanasi and Kanyakumari

Delhi and Mumbai

Mumbai and Kolkata

Kolkata and Chennai
94. Which among the following ancient ports of Kerala have identified with modern cranganore?
Barace

Tyndis

Nelcynda

Muziris
95. Which of the following river originates in Silent Valley?
Pamba river

Periyar river

Kunthi river

Chaliyar river
96. 'Kunhikannan'was the original name of one of the social reformers of Kerala:
Vagbhatananda

Kumara Guru

Dr.Palpu

Thycaud Ayya
97. Who became the editor of ‘Yuktivadi’Magazine in 1928?
C.Krishnan

Blessed Kuriakose Elias Chavara

Sahodaran Ayyappan

A.K.Pillai
98. Which of the following is not correctly matched?
Kainakary-Blessed Kuriakose Elias Chavara

Chempazhanthy-Sree Narayana Guru

Petta-Dr.Palpu

Venganoor-Chattampi Swamikal
99. Indicate the wrong pair among the following:
Kalyana Dayani Sabha-Vaikunda Swamikal

Sadhu Jana Paripalana Sangam-Ayyankali

Anand Maha Sabha-Brahmananda Sivayogi

Prathyaksha Raksha Daiva Sabha –Poikayil Yohannan
100. The book’Christumatha Nirupanam’is written by:
Brahmananda Sivayogi

Swami Agamanda

Chattampi Swamikal

C.Kesavan