Post: Tradesman (Electrical)
Department: Technical Education
Category Code: 586/17
Question Paper: 98/18
Qualification: Technical High School Leaving Certificate Examination (THSLC); SSLC + National Trade Certificate (NTC) in electrical
Date of Test: 18-09-2018
If you find mistakes, comment below
- Unit of Electrical energy is __________.
- Ampere Hour
- Kilowatt Hour
- Kilowatt
- Kilovolt Ampere
- Magnitude of electrical shock on a human body depends upon __________.
- Current flow through the body
- Path of electric current through the body
- Duration of electric shock
- All of these
- One of the following components is a passive device __________.
- Field effect transistor
- Silicon controlled rectifier
- Air core inductor
- Zener diode
- Armouring is provided in the underground cable to safeguard against __________.
- Mechanical injury
- Moisture entry
- White ant attack
- Bursting of failure
- The main switch is used in single phase supply is to be provided with __________.
- Fuse in both line and neutral
- A link in the line and a fuse in the neutral
- A fuse in the line and a link in the neutral
- None of these
- Which of the following units is the correct one for reactive power?
- Kilovolt Ampere
- Kilowatt
- Megawatt
- Kilovolt Ampere reactive
- The type of insulator used for holding high transmission overhead conductor on straight running of poles __________.
- Post insulator
- Pin insulator
- Stay insulator
- Shackle insulator
- A water pump lifts less water than earlier, what could be the reason for this fault?
- Impeller damaged
- Level of water in pump is too high
- Pump running in reverse direction
- Motor running fast
- In an energy meter the holes of the aluminium disc helps to __________.
- Prevent creeping error
- Reduce the resistance
- Reduce the friction
- Reduce the weight of disc
- Earth leakage circuit breaker is used to disconnect the supply from __________.
- Short circuit
- Ground fault
- Open circuit
- Overload
- In a transformer, the chemical contained inside the Breather is __________.
- Mineral oil
- Salt
- Silica gel
- Water
- The device which can be used as switch as well as protective device is __________.
- Double pole Iron clad switch
- Intermediate switch
- Earth leakage circuit breaker
- Miniature circuit breaker
- Size of hammer is specified by __________.
- Length of hammer
- Diameter of the phase
- Height of the head
- Weight of the hammer
- Gravity controlled instrument has to be kept in __________.
- Vertical position
- Horizontal position
- Inclined position
- Any position
- A sodium vapour lamp gives which colour of light?
- Green colour
- White colour
- Yellow colour
- Red colour
- High pressure mercury vapour lamp has three pin bayonet cap lamp holder. This is done for
__________.
- To make a three phase connection
- Prevent wrong connection
- To earth the lamp
- None of these
- A choke is generally used in series with fluorescent tube circuit to __________.
- Improve the power factor
- Prevent flickering
- To make high voltage for conduction
- Suppress radio interference
- Three phase distribution transformer are usually connected in __________.
- Delta/Delta
- Star/Star
- Star/Delta
- Delta/Star
- Conductivity of aluminium is __________.
- Sixty percent to that of copper
- Forty percent to that of copper
- Eighty percent to that of copper
- Fifty percent to that of copper
- The flux per unit area of material is known as __________.
- Current density
- Flux density
- Magnetic lines of force
- Electromotive force
- Which lamp has more resistance with same applied voltage?
- Forty watts
- Hundred watts
- Sixty watts
- Fifteen watts
- Tool used for cutting, twisting or holding of wires or cables for terminations __________.
- Insulated combination plier
- Insulated side cutting plier
- Insulated round nose plier
- Insulated flat nose plier
- Alternating current is converted into direct current by __________.
- Alternator
- Motor
- Rectifier
- Transformer
- Buchholz relay is generally used for the protection of __________.
- Transmission line
- Transformer
- Alternator
- Generator
- Which of the following is a conventional source of energy?
- Coal
- Solar
- Small Hydro
- Wind
- Advantage of Hydroelectric power station is __________.
- Low cost
- Free from pollution
- No fuel transportation problem
- All of these
- Which of the following system electric power may be transmitted?
- Overhead system
- Underground system
- Overhead and underground system
- None of these
- The fuel used in nuclear generating power plant is __________.
- Crude oil
- Isotopes of Uranium
- Liquefied hydrogen
- Methane
- What is the basic three electrical quantities?
- Resistance, Capacitance, Inductance
- Power, Voltage, Conductance
- Voltage, Current, Resistance
- Current, Reactance, Inductance
- Value of short circuit current will flow in the circuit is __________.
- Zero
- Very low
- Normal
- Infinite
- Motor used in household refrigerator is __________.
- D.C. Series motor
- Single phase induction motor
- D.C. Shunt motor
- Universal motor
- Which motor would you select for vacuum cleaner?
- Universal motor
- Repulsion motor
- Hysteresis motor
- None of these
- The damper winding in a synchronous motor is generally used __________.
- To provide starting torque only
- To reduce noise level
- To reduce eddy current
- To prevent hunting and provide the starting torque
- An Autotransformer which has only one winding may be used as __________.
- Step-up transformer
- Step-down transformer
- Step-up and Step-down transformer
- None of these
- The unit of solid angle is a __________.
- Lumen
- Radian
- Steradian
- Candela
- Full form of MCCB is __________.
- Moulded Case Circuit Breaker
- Moulded Case Current Breaker
- Miniature Current Circuit Breaker
- Minimum Current Circuit Breaker
- The star delta starter is used in __________.
- Flour mills
- Pumps
- Machine tools
- All of these
- Motor used in ceiling fan is __________.
- Split phase motor
- Capacitor start motor
- A.C. series motor
- Repulsion motor
- Rotor resistance starter used to which of the following motors?
- Slip ring motor
- Heavy duty squirrel cage motor
- Medium duty squirrel cage motor
- Double cage motor
- The thickness of insulation provided in the conductor in cable depends upon the factor is __________.
- Resistivity of the conductor
- Current to be carried
- Operating voltage
- Power factor
- The structure of pin type insulator is wavy. It is done to increase __________.
- Mechanical strength
- Puncture strength
- Flash overvoltage
- Thermal strength
- Carbon arc lamp are commonly used in __________.
- Cinema projectors
- Domestic lighting
- Street lighting
- Photography
- Which of the following is one not a part of circuit breaker?
- Explosion plot
- Conservator
- Operating mechanism
- Fixed and moving contact
- The handle of iron box is made up of __________.
- Bakelite
- Ebonite
- Chromium
- Bakelite and Ebonite
- Lumen per watt is the unit of __________.
- Light flux
- Luminous efficiency
- Luminous intensity
- Brightness
- The generating voltage and frequency in India is __________.
- 11 kV and 50 Hz
- 11 kV and 60 Hz
- 220 kV and 50 Hz
- 220 kV and 60 Hz
- The lamp generally used for lighting purpose is __________.
- Carbon filament lamp
- Arc lamp
- Tungsten filament lamp
- All of these
- In running condition voltage across tube starter is __________.
- 110 V
- 180 V
- 220 V
- Zero
- Capacitor is used in tube circuit is __________.
- To improve the power factor
- To improve the voltage
- To safeguard the tube
- To give the full light
- The synchronous speed of an induction motor refers to the speed of the __________.
- Rotor
- Armature
- Speed marked on the nameplate
- Rotating magnetic field
- Three phase induction motor started by DOL starter, the short circuit current is protected by __________.
- No volt coil
- Overload relay
- Back off fuse
- Protective earth connection
- Cables are drawn through the pipe and terminated. The system of wiring is called __________.
- PVC casing and capping wire
- Conduit wiring
- Teak wood batton wiring
- Teak wood casing caping wiring
- As compared to rewirable fuses HRC fuse have __________.
- High speed of operation
- High rupturing capacity
- No ageing effect
- Low rupturing capacity
- The following application D.C. is essential __________.
- Electric traction motor
- Electric home appliances
- Machine shop motor
- Illumination
- Which of the following does not change in a transformer?
- Current
- Voltage
- Frequency
- All of these
- Which winding in a transformer has more number of turns?
- Low voltage winding
- High voltage winding
- Winding does not depend upon number of turns
- None of these
- In a D.C. machine the number of brushes in lap winding is __________.
- Same number of poles
- Double number of poles
- Half of the number of poles
- Two numbers
- Compensating windings are used in D.C. generator is __________.
- To reduce eddy current by local short circuit
- To provide path for the circulation of cooling air
- To neutralize the cross magnetic effect of armature reaction
- None of these
- Red colour wire is generally known for __________.
- Insulated wire
- Earth wire
- Neutral wire
- Phase wire
- Stepper motor is __________.
- Single phase motor
- Two phase motor
- Three phase motor
- D.C. motor
- The positive pole of dry cell is made of __________.
- Copper
- Zinc
- Carbon
- Mercury
- The energy of secondary cells are renewed by __________.
- Heating it
- Passing current through it
- Renewing its chemicals
- It can’t be renewed at all
- When cells are connected in parallel, the result is __________.
- The current capacity increases
- The current capacity decreases
- The EMF capacity increases
- The EMF capacity decreases
- The composition of electrician solder is __________.
- Tin-40%, Lead-60%
- Tin-50%, Lead-50%
- Tin-90%, Lead-10%
- Tin-60%, Lead-40%
- Fire extinguisher used in the event of electric fire is __________.
- Dry powder type
- Gas cartridge type
- Halon type
- Foam type
- Britania straight joint is used for __________.
- Increase the length of the conductor
- Increase the resistance of the conductor
- Increase the conductivity of the conductor
- Increase the mechanical strength of the conductor
- E.C.E. stands for __________.
- Electrovalent Chemical Equilant
- Electro Chemical Equilant
- Electrolysis Cathode Equilant
- Electro Cardio Equilant
- A current of ten ampere is same as __________.
- Ten joules per second
- Ten watts per second
- Ten volts per second
- Ten coulombs per second
- The power dissipated in a pure capacitor is __________.
- Zero
- Unity
- Proportional to the applied voltage
- Proportional to the value of capacitance
- Which of the following has positive temperature co-efficient?
- Germanium
- Aluminium
- Graphite
- Rubber
- I.G.B.T. stands for __________.
- Integrated Gate Bidirectional Transistor
- Integrated Gate Blocky Transistor
- Integrated Gate Bipolar Transistor
- Insulated Gate Bipolar Transistor
- In Fleming’s right hand rule, the forefinger indicates __________.
- The direction of induced EMF
- The direction of motion of the conductor
- The direction of induced current
- The direction of magnetic flux
- Diode is a __________.
- Multidirectional device
- Unidirectional device
- Bidirectional device
- None of these
- Earth wire or ground wire is made of __________.
- Copper
- Iron
- Aluminium
- Galvanized steel
- Which tool is used to transfer measurement to the inside calliper?
- Odd leg calliper
- Steel rule
- Genny calliper
- Divider
- Chisel used for making rectangular holes in wood is __________.
- Firmer Chisel
- Paring Chisel
- Mortise Chisel
- Beavel - Firmer Chisel
- Name the element used as impurity to produce N-type semiconductor __________.
- Gallium
- Boron
- Aluminium
- Arsenic
- Which of the following is known as metal rectifier?
- Gas tube diode
- Silicon diode
- Copper oxide rectifier
- All of these
- Type of filter can be used along with a full wave rectifier only is __________.
- Series inductor filter
- Pi filter
- Resistance Capacitance filter
- Choke input LC filter
Question Error
- The difference between peak positive and peak negative values in AC is called __________.
- Effective value
- Peak to Peak value
- Maximum value
- Average value
- Who was the main writer who assisted William Logan in the writing the ‘Malabar Manual’?
- O. Chanthu Menon
- A. Ayyappan
- V.P. Menon
- Itti Achuthan
- Malabar Manual was first published in __________.
- 1889
- 1887
- 1886
- 1880
- Magna Carta was signed in __________.
- 1215
- 1342
- 1299
- 1432
- Prathyksha Raksha Daiva Sabha was founded by __________.
- Poykayil Yohannan
- K. Maadhavan
- Dr. Palpu
- Vagbhatananda
- Who was known as Kerala Lincolon?
- EMS Nambudirippad
- Pandit Karuppan
- A.K. Gopalan
- K.R. Gouri Amma
- Atmavidya Kahalam was written by __________ in 1929.
- Vagbhatananda
- Vakkom Abdul Khadar
- Kalidasan
- Swami Sivayogi
- The famous Kizhariyur bomb case was in __________.
- 1857
- 1940
- 1945
- 1942
- Who started servants of Mary Immaculate?
- K. Karuppan
- Chavara Achan
- K. Krishnan
- Makthi Thangal
- The Slavery abolished in America was __________.
- 1900
- 1864
- 1865
- 1765
- Right to Health is mentioned in __________ of U.N. Declaration Human Rights.
- Article 8
- Article 20
- Article 25
- None of these
- Kallumala Samara was broken out in 1915 in the __________ district of Kerala.
- Thiruvananthapuram
- Kozhikode
- Alappuzha
- Kollam
- “Liberty, Equality and Fraternity” is the slogan of __________ Revolution.
- American
- French
- Chinese
- None of these
- The most prominent work on Partition is Freedom at Midnight was written by __________.
- Annie Besant
- Dominique Lapierre
- Larry Augustine
- Abdul Kalam
- At the time of Indian Independence Hyderabad was ruled by __________.
- Ali Khan
- Mohammed
- Abdul Razak
- None of these
- Who was the murderer of Canolly, the District Collector of Malabar?
- Pokker Haji
- Kunhali
- Haider
- Vadakkeveettil Mohammed
- The Dutch East India Company started in __________.
- 1600
- 1602
- 1605
- 1700
- The famous Aruvippuramprathishta was the challenge against the Brahmin by __________.
- Nanu Asan
- Guru Govind
- K. Karuppan
- Palpu
- Hunter Commission was appointed in __________.
- 1880
- 1881
- 1884
- 1882
- Bharath Matha Society was founded by __________.
- J.M. Chatterjee
- Chandrashekhar Azad
- N. Bhattachari
- None of these
- Who had written “India’s struggle for Independence”?
- Bipin Chandra
- Sumit Sarkar
- Ray Choudhar
- A.R. Desai
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