SUB ENGINEER – KSEB

FINAL ANSWER KEY
Question Paper Code: 16/2015/OL
Category Code: 325/2011
Exam: Sub Engineer in KSEB
Medium of Question: English
Date of Test 26-08-2015
Alphacode A
Question1:-Who among the following is known as Grand Father of Indian Nation
A:-Raja Ram Mohan Ray
B:-Dayananda Saraswathi
C:-Swami Vivekananda
D:-Bala Gangadhar Tilak
Correct Answer:- Option-B
Question2:-Which Indian river is known as sorrow of Orissa
A:-Mahanadi
B:-Narmada
C:-Tapti
D:-Padma
Correct Answer:- Option-A
Question3:-Dr. Babasaheb Ambedkar International Airport is in
A:-Ahammadabad
B:-Hyderabad
C:-Indore
D:-Nagpur
Correct Answer:- Option-D
Question4:-Lord Curzon’s Partition of Begal came to effect on
A:-18 october 1905
B:-16 october 1905
C:-19 october 1905
D:-17 october 1905
Correct Answer:- Option-B
Question5:-Sangai is the state animal of
A:-Tripura
B:-Meghalaya
C:-Manipur
D:-Arunachal Pradesh
Correct Answer:- Option-C
Question6:-Who was the commissioner of India Census 2011
A:-Vinod Rai
B:-C.Chadramouli
C:-Suryaprakash
D:-K.T.M.Iqbal
Correct Answer:- Option-B
Question7:-Ajantha cave paintings depict scenes from the
A:-Ramayana
B:-Mahabharatha
C:-Rigveda
D:-Jataka tales
Correct Answer:- Option-D
Question8:-The Sansad Adarsh Gram Yojana was launched on the birth anniversary of
A:-Sardar Vallbai Patel
B:-Syamaprasad Mukherjee
C:-Mahathma Gandhi
D:-Jayaprakash Narayan
Correct Answer:- Option-D
Question9:-Who among the following published the daily namely ‘voice of India’
A:-W.C.Banarjee
B:-Annie Basant
C:-Dada Bai Navaroji
D:-Firoz shah mehta
Correct Answer:- Option-C
Question10:-Name the Indian sports woman selected as the brand ambassador of Telengana state
A:-Sania Mirza
B:-Saina Nehwal
C:-P.V.Sindhu
D:-Koneru Hampi
Correct Answer:- Option-A
Question11:-J.C. Daniel award 2014 was awarded to……
A:-Adoor Gopala Krishnan
B:-M.T. Vasudevan Nair
C:-Amal Neerad
D:-Ashique Abu
Correct Answer:- Option-B
Question12:-The revolt held to wear upper cloth for lower caste women in kerala is….
A:-Channar agitation
B:-Guruvayur satyagraha
C:-Paliyam satyagraha
D:-Malabar riot
Correct Answer:- Option-A
Question13:-Which district of kerala speaks more number of languages?
A:-Kozhkkode
B:-Malappuram
C:-Kannur
D:-Kasaragod
Correct Answer:- Option-D
Question14:-Which of the following team are behind the Malayali Memorial Movement?
A:-K.P. Shankara menon,Dr.Palpu,G.P. Pillai
B:-Chattambi Swamikal,C.V.Ramanpillai,V.T.Bhattathirippad.
C:-T.K.Madhavan,Dr.Palpu,K.Kelappan
D:-Mannath Pathmanabhan,K.P. Kesava menon,P.krishnapillai
Correct Answer:- Option-A
Question15:-Which among the following is known as the first college in India?
A:-CMS College Kottayam
B:-BCM College kottayam
C:-University College
D:-Maharajas College
Correct Answer:- Option-A
Question16:-Cochin Stock exchange came in to being…..
A:-1959
B:-1969
C:-1979
D:-1989
Correct Answer:-Question Cancelled
Question17:-The largest back water in kerala is …….
A:-Ashtamudi
B:-Chaliyar
C:-Vembanad
D:-punnamada
Correct Answer:- Option-C
Question18:-The total number of wildlife sanctuaries in Kerala is…….
A:-12
B:-13
C:-14
D:-15
Correct Answer:- Option-B
Question19:-The gold medalist among malayalees in Asian Games 2014 is………
A:-Preeja Sreedharan
B:-Dipika Pallikkal
C:-O.P. Jaisha
D:-Tintu Luka
Correct Answer:- Option-D
Question20:-The co-operative dairy products entrepreneurship MILMA was established in the year…
A:-1980
B:-1970
C:-1960
D:-1950
Correct Answer:- Option-A
Question21:-A free electron means?
A:-All the electrons in an atom.
B:-The electrons not belongs to the atom itself.
C:-Valance electrons which are loosely attached to the nucleous.
D:-All the above
Correct Answer:- Option-C
Question22:-The speed with which the effect of emf is experienced at all parts of a conductor resulting the flow of current is
A:-Velocity of charge
B:-Velocity of propagation of electric field
C:-Speed of response
D:-None of above
Correct Answer:- Option-B
Question23:-When a potential difference is applied to a resistor the heat is produced by
A:-Due to the collision of free electrons with the molecules or atoms of the resistor
B:-Power dissipation
C:-Speed of response
D:-None of above
Correct Answer:- Option-A
Question24:-On application of heat on electrolyte it exhibit
A:-Positive temp. coefficient
B:-No change in its resistance
C:-Resistance will increase
D:-Negative temp. Coefficient.
Correct Answer:- Option-D
Question25:-An operational amplifier is a
A:-dependent source
B:-Independent source
C:-model source
D:-None of above
Correct Answer:- Option-A
Question26:-A wire of resistance of 6 ohms is bent in the form of a circle , the effective resistance between two points on
any diameter is
A:-6 ohm
B:-12 ohm
C:-1.5 ohm
D:-9 ohm
Correct Answer:- Option-C
Question27:-A wire of resistance R ohm is streatched to double its length, then its resistance become
A:-R/4
B:-R/2
C:-2R
D:-4R
Correct Answer:- Option-D
Question28:-Two parallel wires carrying current in opposite direction
A:-Attracts each other
B:-Repel each other
C:-cancel each other
D:-None of the above
Correct Answer:- Option-B
Question29:-A coil has a resistance of 25 ohm and inductance of 5H is connected to a DC source of 50V is suddenly switched
off what will be the value of current at the time of switching off
A:-2A
B:-10A
C:-1.96A
D:-0.5A
Correct Answer:- Option-A
Question30:-The inductive reactance of an inductor in a DC circuit is
A:-2∏fL
B:-Zero
C:-ωL
D:-∞
Correct Answer:- Option-B
Question31:-In a circuit element if the p.d is higher than the applied voltage of the source then it will be
A:-DC circuit
B:-Neither ac nor dc circuit
C:-AC circuit
D:-For both circuit
Correct Answer:- Option-C
Question32:-The moving system of an indicating type of electrical instrument is subjected to
A:-A deflecting torque
B:-Controlling torque
C:-Damping torque
D:-All the above
Correct Answer:- Option-D
Question33:-The most efficient damping employed in electrical instrument is
A:-Air friction
B:-Fluid friction
C:-Eddy current
D:-None of the above
Correct Answer:- Option-C
Question34:-In thermocouple ammeter the heat produced is proportional to
A:-Current
B:-Square root of current
C:-square of current
D:-voltage
Correct Answer:- Option-C
Question35:-In a cross coil megger ,when two currents are passing through them The torque acting up on the coil
A:-opposite direction
B:-same direction
C:-TanΦ
D:-none of the above
Correct Answer:- Option-A
Question36:-The frequency error in induction type ammeter is compensated by
A:-Self compensated
B:-not required
C:-non inductive shunt
D:-inductive shunt
Correct Answer:- Option-C
Question37:-An induction watt meter consist of
A:-series electromagnet
B:-shunt electromagnet
C:-permanent magnet
D:-series and shunt electromagnet
Correct Answer:- Option-D
Question38:-The efficiency of a solar cell is
A:-High
B:-Very high
C:-Low
D:-Very low
Correct Answer:- Option-C
Question39:-in core type transformers the number of flux paths are
A:-2
B:-more than 2
C:-Half of the path
D:-single
Correct Answer:- Option-D
Question40:-The relation between the excitation current and magnetic flux of a transformer is
A:-Current leads flux
B:-Flux leads the current
C:-They are in phase
D:-None of the above
Correct Answer:- Option-A
Question41:-The equivalent resistance and leakage reactance of a transformer can be found out by
A:-Open circuit test
B:-short circuit test
C:-polarity test
D:-None of the above
Correct Answer:- Option-B
Question42:-Hydro generator is the commercial name of
A:-Round rotor generator
B:-Cylindrical rotor synchronous generator
C:-Salient pole synchronous generator
D:-All the above
Correct Answer:- Option-C
Question43:-An electrical machine with lower efficiency will have
A:-Less losses
B:-More losses
C:-No losses
D:-Low operating cost
Correct Answer:- Option-B
Question44:-The effect of armature reaction under the pole shoes can be limited by
A:-Inter poles
B:-High reluctance pole tips
C:-Compensating windings
D:-All the above
Correct Answer:- Option-C
Question45:-DC motors are started by using starters because
A:-To increase the starting current
B:-To reduce the staring current
C:-To increase the speed
D:-none of the above
Correct Answer:- Option-B
Question46:-Swinburne ‘s test can not be performed on
A:-Shunt motor
B:-compound motor
C:-series motor
D:-All the above
Correct Answer:- Option-C
Question47:-which of the following are used as constant speed drive
A:-Dc shunt motor
B:-DC series motor
C:-DC compound motor
D:-All the above
Correct Answer:- Option-A
Question48:-No load slip of an induction motor is
A:-Large
B:-No slip
C:-Very small
D:-None of the above
Correct Answer:- Option-C
Question49:-The relative advantage of a cage motor over a wound rotor motor of same power is
A:-Cage motor is More efficient
B:-Cage motor is less cost
C:-Better operating power factor
D:-All the above
Correct Answer:- Option-D
Question50:-The maximum torque of an induction motor is proportional to
A:-Square of supply voltage
B:-Supply voltage
C:-Reciprocal of the square of supply voltage
D:-None of the above
Correct Answer:- Option-A
Question51:-A synchronous motor runs on
A:-AC only
B:-DC only
C:-Both ac and dc
D:-None of the above
Correct Answer:- Option-A
Question52:-If the armature coil of a DC machine is N turns then Number of conductors of any coil side
A:-2N
B:-N/2
C:-N²
D:-N
Correct Answer:- Option-D
Question53:-The distance between two consecutive and similar top coil side is called
A:-Back pitch
B:-Front pitch
C:-Winding pitch
D:-Commutator pitch
Correct Answer:- Option-C
Question54:-In lap wound machine the number of brushes used is equal to
A:-number of poles
B:-2
C:-number of turns
D:-number of commutator segments
Correct Answer:- Option-A
Question55:-A mooving iron instrument can measure
A:-AC
B:-AC & DC
C:-DC
D:-Pulse
Correct Answer:- Option-B
Question56:-The emf developed in any physical system act in such a direction to tend to
A:-Decrease co energy at constant mmf
B:-Decrease the co energy at constant flux
C:-Increase the co energy at constant mmf
D:-Increase the co energy at constant flux
Correct Answer:- Option-C
Question57:-The factor to be considered while selecting the site of a hydel power plant
A:-Quantity of water available
B:-Head of water
C:-Accessibility of the site
D:-All the above
Correct Answer:- Option-D
Question58:-Specific speed of a turbine is the speed at which it develop 1 metric HP under the head of
A:-1 metric meter
B:-1 meter
C:-1 feet
D:-1 cubic meter
Correct Answer:- Option-B
Question59:-The active recovery voltage depends on
A:-Power factor
B:-Armature reaction
C:-Circuit condition
D:-All the above
Correct Answer:- Option-D
Question60:-The highest current that a circuit breaker is capable of breaking at recovery and re striking voltage is
A:-Breaking capacity
B:-Making capacity
C:-Recovery current
D:-recovery voltage
Correct Answer:- Option-A
Question61:-Circuit breaker intended for rapid auto re closing with rated operating duty o-m-co in which m represents
A:-Making
B:-Breaking
C:-Dead time
D:-Re closing
Correct Answer:- Option-C
Question62:-The heat produced by an electric heating element is according to
A:-Ohm’s law
B:-Stefan’s law
C:-Snell’s law
D:-Faraday’s law
Correct Answer:- Option-B
Question63:-Ajax Wyatt furnace make use of a crucible in
A:-Horizontal
B:-At an angle of 120°
C:-Vertical
D:-None of the above
Correct Answer:- Option-C
Question64:-High frequency capacitance heating method is employed for heating
A:-Plastic
B:-Wood
C:-Dehydration of foods
D:-All the above
Correct Answer:- Option-D
Question65:-in carbon arc welding the carbon electrode with respect to work is
A:-Negative
B:-Positive
C:-As positive or negative
D:-Non of the above
Correct Answer:- Option-A
Question66:-The filament lamp work at a pf of
A:-.5
B:-1
C:-.7
D:-0
Correct Answer:- Option-B
Question67:-Which lamp has the highest luminous efficiency
A:-Filament
B:-Neon
C:-Mercury vapor
D:-Sodium vapor
Correct Answer:- Option-D
Question68:-In illumination space to height ratio is
A:-1 to 2
B:-1
C:-less than 1
D:-None of the above
Correct Answer:- Option-A
Question69:-The induction motor cannot run at synchronous speed because if so
A:-Rotor emf would be zero
B:-Rotor current would be zero
C:-Rotor torque would be zero
D:-All the above
Correct Answer:- Option-D
Question70:-Semi closed or totally closed slots are used in 3Ø Induction Motor essentially to
A:-Reduce magnetizing current
B:-Increase efficiency
C:-Improve starting torque
D:-Increase magnetizing current
Correct Answer:- Option-A
Question71:-In DC machine the armature windings are placed on the rotor for effective
A:-Generation of voltage
B:-Development of torque
C:-Commutation
D:-Energy conversion
Correct Answer:- Option-C
Question72:-The most powerful electromagnet in a normal DC machine operating at full load condition is
A:-Field winding
B:-Armature winding
C:-inter pole winding
D:-Compensating winding
Correct Answer:- Option-A
Question73:-Which of the following is called as stray flux
A:-Armature flux
B:-Field flux
C:-Leakage flux
D:-None of the above
Correct Answer:- Option-C
Question74:-When a coil moves through a time varying flux the induced emf present in the coil is
A:-Dynamically induced
B:-Statically induced
C:-Motional emf
D:-Both dynamically and Statically induced
Correct Answer:- Option-D
Question75:-A 3 Ø SCIM stator rewound for 6 poles withh out any alteration in the rotor will run at a speed
A:-<1000 rpm B:-<1500 rpm C:-<1200 rpm D:-0 rpm Correct Answer:- Option-A Question76:-A 3Ø star connected IM takes 20A from supply. When connected in delta the motor will take a current of A:-20√3 A B:-20/√3 A C:-20 A D:-10A Correct Answer:- Option-A Question77:-The armature core of a DC machine is laminated to minimise A:-Hysteresis loss B:-Eddy current loss C:-Mechanical loss D:-Temperature loss Correct Answer:- Option-B Question78:-Which part of a DC motor has the maximum flux A:-pole core B:-Interpole C:-Leading pole tip D:-Trailing pole tip Correct Answer:- Option-C Question79:-The air blast circuit breaker have best application in system of operating voltage A:-Below 132KV B:-132KV to 400KV C:-Above 400KVA D:-None of this Correct Answer:- Option-B Question80:-The cheapest shielding material used in Nuclear plant is A:-Concrete B:-Brick C:-Boron D:-Cadmium Correct Answer:- Option-A Question81:-Superposition Theorem is essentially based on the concept of A:-Reciprocity B:-Linearity C:-Duality D:-Non linearity Correct Answer:- Option-B Question82:-Form factor for DC supply voltage is always A:-Zero B:-Unity C:-Infinity D:-Any value between zero and one Correct Answer:- Option-B Question83:-In purely resistive circuits A:-Power factor is unity B:-Power consumed is zero C:-Heat produced is zero D:-Power factor is zero Correct Answer:- Option-A Question84:-In a series resonant circuit, the impedance below resonant frequency is A:-Capacitive B:-Inductive C:-Resistive D:-Depends on values of circuit components Correct Answer:- Option-A Question85:-The figure of merit of RLC circuit will increase if A:-R decreases B:-R increases C:-Voltage increases D:-Voltage decreases Correct Answer:- Option-A Question86:-In an Intrinsic Semiconductor, Fermi Level represents the energy, with probability of its occupation of A:-0 % B:-25 % C:-50 % D:-100 % Correct Answer:- Option-C Question87:-An Infra Red LED is usually fabricated from A:-Ge B:-Si C:-GaAs D:-GaAsP Correct Answer:- Option-C Question88:-Avalanche Photo diodes are preferred over PIN diodes in optical communication systems because of A:-Speed of operation B:-Higher Sensitivity C:-Larger bandwidth D:-Larger power handling capacity Correct Answer:- Option-D Question89:-Power Transistors are invariably provided with A:-Heat Sink B:-Metallic casing C:-Soldered connections D:-Fan for heat removal Correct Answer:- Option-A Question90:-In a JFET, beyond Pinch Off Voltage, as the drain voltage increases, the drain current A:-Decreases B:-Remains constant C:-Increases D:-May increase or decrease Correct Answer:- Option-B Question91:-After firing an SCR, if the gate pulse is removed, the SCR current A:-Remains the same B:-Reduces to zero C:-Rises up D:-Rise a little, then falls to zero Correct Answer:- Option-A Question92:-One of the characteristic of the Emitter Follower is its A:-Low input resistance B:-Low current gain C:-Low voltage gain D:-High output resistance Correct Answer:- Option-C Question93:-Cross Over Distortion in class B push pull amplifier is eliminated by A:-Class C operation B:-Class AB operation C:-Elimination of output transformer D:-Reducing transistor bias Correct Answer:- Option-B Question94:-A high Q tuned circuit in a tuned amplifier permits it to have high A:-Selectivity B:-Fidelity C:-Sensitivity D:-Frequency range Correct Answer:- Option-A Question95:-Which of the following Op-Amp system is non linear? A:-Current to Voltage Converter B:-Logarithmic Amplifier C:-Active Filter D:-Delay Equalizer Correct Answer:- Option-B Question96:-At microwave frequencies, the size of the antenna becomes A:-Very large B:-Large C:-Small D:-Very small Correct Answer:- Option-D Question97:-In a single phase full converter, the number of SCRs conducting during overlap is A:-1 B:-2 C:-3 D:-4 Correct Answer:- Option-D Question98:-A sinusoidal voltage of amplitude 1 kV is amplitude modulated by another sinusoidal voltage to produce 30% modulation. The amplitude of each sideband term is A:-300 volts B:-150 volts C:-500 volts D:-250 volts Correct Answer:- Option-B Question99:-An interrupt in which the external device supplies its address as well as the interrupt request is known as A:-Vectored interrupt B:-Maskable interrupt C:-Non - Maskable interrupt D:-Designated interrupt Correct Answer:- Option-A Question100:-Logic 1 in negative logic system is represented by A:-Zero level B:-Lower voltage level C:-Higher voltage level D:-Negative voltage Correct Answer:- Option-B