Post : Electrician
Department : Kerala Tourism Development Corporation KTDC
Category Code : 110/17
Qualification : SSLC + National Trade certificate in the trade of Electrician or Wireman and Wireman License issued by Kerala State Electricity Licensing Board
Question Paper Code : 149/17
Date of Test : 14-12-2017
- Sweep of ceiling fan refers to
- Radius of circle formed by its rotation
- Double the length of blade
- The distance from the center of motor to tip of blade
- Double the distance from center of motor to tip of blade
- Unit for measurement of electric energy is
- KW
- KwH
- Volt
- Volt ampere
- When temperature of carbon increases, its resistance
- Decreases
- Increases
- Remains same
- None of these
- To decrease the resistance of any conductor, a resistance will be connected in
- Series
- Series-parallel
- Parallel
- None of these
- In India usually generating voltage is
- 440 V
- 11000 V
- 33000 V
- 66000 V
- In AC machines best efficiency is given by
- Transformer
- Induction motor
- Slip ring motor
- Alternator
- Interpoles are connected in
- Series with armature
- Series with field
- Parallel with armature
- None of these
- According to IE rules the permissible variation of frequency is
- 5%
- 3%
- 8%
- 10%
- In conduit wiring +ve and – ve wires are run in the same conduit to avoid
- Capacitive effect
- Inductive effect
- Both Capacitive effect and Inductive effect
- None of these
- The total capacitance of three condensers connected in series as C1 = 30 μF , C2 = 15 μF and C3 = 20 μF
- 6.66 μF
- 65 μF
- 9/60 μF
- 80 μF
- Induction motor runs at
- Synchronous speed
- Below Synchronous speed
- Above Synchronous speed
- None of these
- Short pitch winding is used because it
- Magnifies the voltage
- Saves copper of the end rings
- Improves the wave form of the induced EMF
- Magnifies current
- Generally at unity PF the voltage regulation of an alternator is
- Positive
- Negative
- Zero
- None of these
- In three phase delta connection, line voltage is
- √3 * Vph
- Vph /√3
- Same as phase voltage
- Same as line current
- Alternating current can induce voltage because it has
- High peak value
- Varying magnetic field
- Constant magnetic field
- None of these
- In two watt meter method of power measurement if the PF is unity then
- W1 < W2
- W1 > W2
- W1 = W2
- W2 = 0
- Induction type watt meter can be used in
- AC only
- DC only
- Both AC and DC
- None of these
- Highest doped region in a transistor is
- Emitter
- Collector
- Base
- All are equally doped
- No load test on a transformer is conducted to measure
- Copper loss
- Core loss
- Total loss
- Efficiency
- Which starter will give better starting torque to squirrel cage induction motor
- DOL starter
- Star-delta starter
- Auto transformer starter
- None of these
- Nichrome is widely used for
- Heater coils
- Transformer winding
- Filaments
- All of these
- Unit of flux density is
- Henry/m2
- Webers/m2
- Newton/m2
- Ohms/m2
- A material that is slightly repelled by a magnet is called
- Paramagnetic material
- Diamagnetic material
- Ferromagnetic material
- None of these
- A substance that has high retentivity can be used for the manufacture of
- Electromagnets
- Permanent magnets
- Temporary magnets
- None of these
- A moving iron ammeter reads 10 Amps. How much is the peak current of the oscillation?
- 7.07 A
- 1.414 A
- 70.7 A
- 14.14 A
- If the frequency changes from 50 Hz to 100 Hz keeping voltage constant, the inductive reactance of coil connected to supply
- Remains same
- Become half
- Become doubled
- Become 4 times
- The true power consumed by the pure inductor is
- 0 watt
- 1 watt
- 2 watt
- 4 watt
- Capacitance is not affected by
- Plate area
- Distance between plates
- Dielectric material
- Frequency
- In a capacitive AC circuit
- Current leads the voltage
- Voltage leads the current
- Current is inphase with voltage
- Current lags the voltage
- Synchronous motor when used for power factor improvement should be
- Under excited
- Over excited
- Loaded
- Running on no-load
- To increase the ampere rating the cells are to be connected in
- Series
- Parallel
- Series-parallel
- Parallel-series
- The capacity of a cell is measured in
- Volt-hour
- Volts
- Ampere
- Ampere-hours
- The metal used for the control spring in electrical instrument is
- Steel
- Nichrome
- Hard drawn copper
- Phosphor bronze
- Dynamo meter type meters are used to measure
- Only AC quantities
- Only DC quantities
- Both AC and DC
- Pulsating AC only
- Megger is used to measure
- Earth resistance
- Insulation resistance
- Breakdown voltage of insulation
- Low resistance
- Which one of the instrument has the same calibration for AC and DC?
- Moving iron
- Moving coil
- Hot wire
- Dynamo meter type
Question error
- What type of motor is used in a food mixer?
- DC shunt motor
- Universal motor
- Capacitor start motor
- Shaded pole motor
- The unit of luminous flux is
- Candela
- Steradian
- Lux
- Lumen
- Which of the following is the most efficient as a light source?
- Tungsten filament
- Black body
- Carbon filament
- None of these
- The gas inside the inner discharge tube of a sodium vapour lamp is
- Argon
- Neon
- Helium
- Hydrogen
- How many light points are allowed in one circuit?
- 10 points
- 15 points
- 20 points
- Any number
- The holes on the aluminium disc of an energy meter helps to
- Prevent creeping
- Reducing resistance
- Reduce the weight of disc
- Increase the torque
- Fuse rating is expressed in terms of
- Voltage
- Current
- kVA
- VAR
- Fusing factor of HRC fuses will be
- 1.1
- 1.4
- 1.6
- 1.7
- In this wiring two lamps should be switched ON at a time
- Godown wiring
- Tunnel wiring
- Corridor wiring
- Hostel wiring
- Induced EMF in the armature of a DC generator is basically
- An alternating current
- A direct current
- An oscillating current
- None of these
- Flemings Right hand rule is used to identify the
- Direction of flux
- Direction of rotation in a generator
- Direction of current in a motor
- Direction of induced EMF
- Insulating material used in between commutator segment is
- Varnish
- Empire cloth
- Mica
- Film paper
- Lap winding is made in a machine for
- High current high voltage
- Low voltage low current
- High voltage low current
- High current low voltage
- Back EMF of a DC motor
- Opposes the supply EMF
- Aids the supply EMF
- Does not affect the armature current
- Aids in increasing the supply current
- Insulation resistance is measured in
- Mega watts
- Mega ohms
- Kilo amps
- Kilo volts
- By setting the brush position exactly at magnetic neutral axis we get
- Maximum induced EMF
- Sparkless commutation
- Best performance
- All of these
- The magnetic field produced in the stator of a three phase induction motor travels at
- Rotating speed
- Asynchronous speed
- Synchronous speed
- Slip speed
- The purpose of a back-up fuse is to provide protection against
- Over load
- Under load
- High voltage
- Short circuit
- Jogging operation is also called as
- Starting
- Stopping
- Braking
- Inching
- While running, the rotor frequency in a 3 phase induction motor is equal to
- Stator frequency
- (Stator frequency)/slip
- Stator frequency × slip
- None of these
- The rotating magnetic field in a 3 phase 6 pole 50 Hz slip ring induction motor will rotate at
- 1000 rpm
- 1200 rpm
- 1500 rpm
- 800 rpm
- Starting capacitor of single phase motor is
- Electrolytic capacitor
- Ceramic capacitor
- Oil filled paper capacitor
- None of these
- The type of motor used in ceiling fan is
- Split phase
- Capacitor start
- Capacitor start capacitor run
- Permanent capacitor
- Which one of the following motor will have lowest starting torque?
- Universal motor
- Shaded pole motor
- Capacitor start capacitor run motor
- Repulsion induction motor
- When the speed of alternator increases the frequency
- Increases
- Decreases
- Remains same
- None of these
- Salient pole type alternators are used in
- Thermal power stations
- Hydro power stations
- Nuclear power stations
- All of these
- Which is the common method of cooling a power transformer?
- Air cooling
- Oil cooling
- Air-blast cooling
- Natural cooling
- Iron losses of transformer are measured by
- Low PF watt meter
- Unity PF watt meter
- Volt meter
- KWH meter
- A transformer is working at its maximum efficiency. Its core loss is 400 watts, its copper loss will be
- 200 W
- 400 W
- 500 W
- 800 W
- Change in DC excitation of a synchronous motor changes
- Motor speed
- Applied voltage of the motor
- PF of the motor
- All of these
- Conduction in a JFET is always by the
- Majority carriers
- Minority carriers
- Holes
- Electrons
- Which of the following transistors can be used in enhancement mode?
- UJT
- JFET
- MOSFET
- NPN transistor
- Type of insulator used for holding for HT overhead conductor on straight running of poles
- Post insulators
- Pin type insulator
- Stay insulator
- Shackle insulator
- The distance between two adjacent line poles is called
- Sag
- Span
- Spacing
- All of these
- Positive electrode of dry cell is made from
- Copper
- Carbon
- Zinc
- Sulphur
- Permeability is the measure of
- The resistance of a metal
- Flux of a magnet
- Conductivity of a substance for magnetic lines of force
- The sum of voltage drops around a magnet
- Moving coil instrument usually have
- Uniform scale throughout the range
- Congested scale in the beginning
- Congested scale in the end
- None of these
- Temperature limit of class E insulation is
- 50°C
- 80°C
- 300°C
- 120°C
- Most commonly used rectifier now a days are
- Rotary converter
- Mercury arc rectifiers
- Solid state diodes
- None of these
- In an ideal transformer
- Windings have no resistance
- Core has no losses
- Core has infinite permeability
- All of these
- KWH meter can be classified as
- Deflecting instrument
- Digital instrument
- Recording instrument
- Integrating instrument
- Fixed coil in a dynamometer type Watt meter is
- Pressure coil
- Current coil
- Power coil
- Dynamic coil
- In MCB overload tripping is executed by
- Magnetic coil
- Overload coil
- Bimetal strip
- Solenoid
- When silica gel in breather is saturated with moisture its colour changes from
- Blue to pink
- Pink to blue
- Blue to yellow
- Blue to red
- Sree Narayana Guru consecrated Siva idol at Aruvippuram in ____________
- 1885
- 1886
- 1887
- 1888
- Ayyankali started the first school for lower castes at ____________
- Perinad
- Venganur
- Kollam
- Varkala
- Who among the following authored Anandasutram?
- Brahmananda Sivayogi
- Vagbhatananda
- Vaikunta Swamikal
- Chattampi Swamikal
- Al Islam published by Vakkam Abdul Khadir Moulavi was a ____________
- Daily
- Weekly
- Fortnightly
- Monthly
- Who among the following was arrested in 1837 during the reign of Swati Thirunal?
- Vaikunta Swamikal
- Chattampi Swamikal
- Swami Agamananda
- None of these
- Who won the gold medal in hundred metres race in the IAAF World Championships 2017?
- Usain Bolt
- Christian Coleman
- Justin Gatlin
- None of these
- Goods and Services Tax was introduced in India on ____________
- 1st April 2017
- 1st March 2017
- 1st July 2017
- 1st June 2017
- Ramnath Kovind is elected as the ____________ President of India.
- 13th
- 14th
- 15th
- 16th
- Who won the 2017 Wimbledon men’s singles title?
- Marlin Cilic
- Roger Federer
- Rafel Nadal
- Novak Djokovic
- Kerala government’s LIFE Mission is related to ____________
- Provide food grains to the poor
- Medicare to the BPL families
- Free education to the poor
- The construction of houses for the poor
- The revolt of 1857 started at ____________
- Meerut
- Delhi
- Lucknow
- Kanpur
- Who was the Principal of National College started in Calcutta during the time of Swadeshi movement?
- Rabindranath Tagore
- Rajani Kant Sen
- Aurobindo Ghosh
- Mukunda das
- How many policemen died in the Chauri Chaura incident?
- 12
- 22
- 28
- 30
- The followers of Khan Abdul Ghaffar Khan were known as ____________
- Brown Shirts
- Black Shirts
- Red Shirts
- Grey Shirts
- The Anamudi peak is situated in the High Ranges of ____________ district.
- Thiruvananthapuram
- Idukki
- Wayanad
- Kozhikode
- The three east flowing rivers of Kerala are the tributaries of ____________ river.
- Kaveri
- Krishna
- Tungabhadra
- Vaigai
- The Yamuna river merges with the Ganga river at ____________
- Devaprayag
- Haridwar
- Kanpur
- Allahabad
- Tiruchirappalli is situated on the banks of the ____________ river.
- Kaveri
- Amaravati
- Vaigai
- Mandovi
- The construction of Hirakkud dam started during the ____________ Five Year Plan.
- Fourth
- Third
- Second
- First
- Who was the first Chief Executive Officer of NITI Ayog?
- Amithab Kanth
- Aravind Panagiriya
- Sindhusree Khullar
- Narendra Modi
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