Post : Tradesman Electronics
Department : Technical Education
Category Code : 345/16
Qualifications : THSLC with specialization in the appropriate trade; SSLC
Question Paper Code : 061/17
Date of Test : 26-05-2017
- Cross over distortion will occur in
- Push pull amplifiers
- Complementary symmetry amplifiers
- Emitter follower
- Single-stage amplifiers
- In MOD-10 counter, how many flip-flop are cascaded?
- 2
- 4
- 3
- Any number
- The reverse saturation current of a Ge P.N. junction doubles for every °C rise in ambient temperature
- 1°C
- 2°C
- 10°C
- None of these
- Memory that loses its contents when power is lost
- Nonvolatile
- Volatile
- Random
- Static
- In 8085, the instruction RAL is
- One byte instruction
- Two byte instruction
- Three byte instruction
- Four byte instruction
- Modern FM receivers use de-emphasis circuit for
- Reducing high frequency noise
- Reducing the amplitude of high frequencies in the audio signal
- Increasing the amplitude of higher modulating frequencies
- Making demodulation easy
- For sound portion of TV transmission, deviation ratio is
- 5
- 1.67
- 88
- 200
- Negative feedback reduces distortion in the amplifier only when it
- comes as part of input signal
- is generated in it
- is part of its output
- exceeds a certain safe level
- The unit of dielectric strength is
- KV/m
- current/min.
- ampere/second
- volts/div.
- For insulators, the forbidden energy gap is of the order of
- 5 eV
- 1 eV
- 0.1 eV
- Zero
- In an unbiased junction, the thickness of charge depletion region is of the order of
- 0.005 μm
- 0.5 μm
- 5 μm
- 10-10 m
- Schottky barrier diode can be used as
- Low noise amplifier
- Variable capacitance device
- Power supply rectifier
- Low level detector
- JFET has main drawback of
- having low input impedance
- having high output impedance
- being noisy
- having small gain-bandwidth product
- In voltage amplifiers the load resistance should be
- as large as possible
- as small as possible
- equal to output impedance
- equal to input impedance
- Darlington amplifier circuit is obtained by cascading
- two emitter follower amplifiers
- two CB stages
- two CE stages
- a CE stage followed by a CB stage
- To turn-off or commutate a thyristor
- gate current is made zero
- forced commutation is used
- reverse blocking voltage is applied
- none of these
- Thyristors are not made using germanium, because
- it is a stable semiconductor
- group V elements cannot doped with it
- its current handling capacity is less than silicon
- it has high leakage current
- A tuned amplifiers amplifies
- a wide band of frequencies
- audio frequencies only
- video frequencies only
- a narrow band of frequencies
- Wein bridge oscillator is basically a
- pulse generator
- sine wave generator
- square wave generator
- triangular wave generator
- The ASCII Code is
- 5 bit code
- 7 bit code
- 9 bit code
- 11 bit code
- In 8085μP, the address of the next instruction to be executed, is stored in
- stack pointer
- address latch
- program counter
- general purpose register
- A switched mode power supply operating at 20 KHz to 100 KHz range uses as the main switching element
- Thyristor
- MOSFET
- Triac
- UJT
- Which represents a magnetic transducer?
- LVDT
- Strain gauge
- Thermocouple
- Photoconductive cell
- A UJT with RBB = 10 KΩ and RBZ = 4 KΩ has intrinsic stand-off ratio
- 0.6
- 0.4
- 0.25
- 5/3
- To generate a 1 MHz signal, the most suitable oscillator is
- Colpitts oscillator
- Phase-shift oscillator
- Wein-bridge oscillator
- None of these
- Which material is generally used for LED?
- Compounds of silica
- Compounds of phosphorus
- Compounds of gallium
- Compounds of sulphur
- Which of the following is a unipolar device?
- P.N. diode
- FET
- Zener diode
- Ordinary transistor
- An audio oscillator uses
- Positive feedback
- Negative feedback
- Both positive and negative feedback
- None of these
- The binary equivalent of A16 is
- 1010
- 1011
- 1000
- 1110
- Signal attenuation means is
- Amplification
- Transmission
- Stoppage
- Weakening
- The power factor of a resonant circuit is (series RL
- 1
- 0
- –1
- 0.5
- In a home TV, the lead from the antenna is
- an ordinary twisted wire
- a co-axial cable
- a twin wire fat ribbon of 300 ohms
- a bare copper wire
- HDD stands for
- High Disk Drive
- Huge Disk Drive
- Hard Disk Drive
- None of these
- Voltage for control grid is supplied by
- EHT
- Extra applied voltage
- Received signals
- None of these
- An antenna is a device
- That converts electromagnetic energy into RF signal
- That converts RF signal into electromagnetic energy
- That converts guided EM waves into free space EM waves and vice versa
- None of these
- To connect several microphones, PA amplifier system required
- Amplifier
- Mixture
- Woofer
- Tweeters
- VHF range is between
- 30 – 30000 MHz
- 3 – 40 MHz
- 30 – 300 MHz
- 3 – 300 MHz
- The two colour different signal is designated as in PAL
- X and Y signals
- U and V signals
- I and Q signals
- P and Q signals
- The Parabolic Dish Antenna (PD gain in dbs is
Question error
- The material used for making permanent magnet in PMMC is
- Aluminium
- Alnico
- Alloy of iron and aluminium
- Iron
- By using Boolean algebra A+A̅
- A
- A̅
- 0
- 1
- The antenna is matched to the RF amplifier by help
- transformer
- small transmission line
- balun
- coupled circuit
- What is the type active component used in electronic tuning?
- Varactor diode
- PIN diode
- Tunnel diode
- Schottky diode
- LNBC stands for
- Low Noise Broadcasting Converter
- Low Noise Broadband Converter
- Low Noise Blocking Converter
- Low Noise Blockdown Converter
- In the truth table of JK flip-flop, the condition J = K = 1 represents
- set
- reset
- toggle
- no change
- The heart of oscilloscope is
- power supply
- vertical amplifier
- horizontal amplifier
- cathode ray tube
- The technique used to generates HV in EHT is
- split addition
- split subtraction
- multiplexer
- extra multi winding
- A bistable circuit used to produce a rectangular output waveform is
- Astable
- R-S flip-flop
- Schmitt trigger
- Shift register
- I AM radio receiver; the detection process is done by using
- Foster seeley discriminator
- Ratio detector
- Diode detector
- Quadrature detector
- The I.F. (Intermediate Frequency) of F.M. radio receiver is
- 10.7 MHz
- 455 KHz
- 33.4 MHz
- 20 KHz
- The frequency of oscillation of RC phase shift oscillator is
Question error
- Zener diodes are
- forward biased and heavily doped
- forward biased and lightly doped
- reverse biased and heavily doped
- reverse biased and lightly doped
- The ability of a material to hold its magnetism after the magnetizing force has been removed
- Hysteresis
- Coercive force
- Retentivity
- Permeability
- The reciprocal of resistance
- Permeance
- Hysteresis
- Conductance
- Reluctance
- SCR has
- P-N-P-N layers
- N-P-P-N layers
- P-P-N-P layers
- P-N-P-N layers
Question error
- Band II (88-108 MHz) is used for
- AM radio broadcasting
- FM radio broadcasting
- Television broadcasting
- Defence Communication
- The basic building block of any counter is
- AND gate
- OR gate
- NAND gate
- Flip-flop
- Kirchhoff’s voltage law is concerned with
- IR drops
- Junction voltages
- Battery e.m.fs.
- Both IR dropsand Junction voltages
Question error
- Ferrite cores commonly used at high frequencies
- Increase core losses
- Decrease core losses
- Decrease inductance
- Increase inductance
- Rating of a battery is usually expressed in
- Watt-hour
- Joule
- Ampere-hour
- Amperes
- The average value of an A.C. current wave given by i = 100 sin100Ï€t is
- 70.7
- 141.4
- 157
- 63.7
- Resonance curve shows the variation of circuit current with
- Voltage
- Power
- Frequency
- Impedance
- The time constant of RL circuit is
- λ = RC seconds
- λ = L/R seconds
- λ = 1/RC seconds
- λ = 63.3% × RC seconds
- Avalanche breakdown is primarily dependent on the phenomenon of
- Collision
- Doping
- Ionisation
- Recombination
- The depletion region of a junction is formed
- During the manufacturing process
- When forward bias is applied to it
- When reverse bias is applied to it
- When its temperature is reduced
- The acceptor impurities are
- Antimony
- Boron
- Germanium
- Carbon
- Depletion region of P-N junction contains
- Immobile ions
- Negatively charged electrons
- Electrons and holes
- None of these
- Counters can be also used for measurement of
- Voltage
- Current
- Phase relationships
- Frequency
- The negative resistance characteristic is in
- Zener diode
- Tunnel diode
- PIN diode
- LED
- A coil has XL = 1000Ω. If both its inductance and frequency are doubled, its reactance will becomes
- 2000
- 500
- 250
- 4000
- Q-factor of parallel circuit is
- Co-efficient of coupling measured in
- A circuit with many inputs but only one output
- Multiplexer
- Decoder
- Demultiplexer
- Encoder
- The method of winding of inductor
- Honey comb
- Toroid
- Series-opposition
- Both Honey comb and Toroid
- One henry =
- The torque which stops the oscillations of the pointer of an instrument is called
- Controlling torque
- Damping torque
- Deflection torque
- Spring control
- A photosensitive resistor is
- Photovoltaic cell
- Thermistor
- VDR
- LDR
- Specific gravity is measured by
- Hydrometer
- Lactometer
- Barometer
- Ammeter
- The ripple frequency of a full-wave rectifier is
- 50 Hz
- 100 Hz
- 60 Hz
- 200 Hz
- A frequency converter stage in radio receiver contains
- Mixer and local oscillator
- R. F. amplifier and mixer
- I. F. amplifier and detector
- Mixer
- Indian Penal Code is not applicable at
- Goa
- Jammu and Kashmir
- Nagaland
- Mizoram
- When did Kerala Legislative Assembly passed Malayalam Bhakha bill for promoting and enrich Malayalam language?
- 2015 Dec.17
- 2015 Feb. 21
- 2016 May 6
- 2016 June 1
Question error
- Which animal is the symbol of the ‘Make in India’ initiative?
- Bull
- Tiger
- Lion
- None of these
- Who was the first Indian President to die in office?
- Rajendra Prasad
- K.R. Narayan
- Sail Singh
- Zakir Hussain
- Which agitation in Kerala is known as the ‘Marumarakkal Samaram’?
- Attingal revolt
- Punnapara Vayalar revolt
- Channar revolt
- Perinad revolt
- Who is the Human Resource Development Minister of Union Cabinet?
- Prakash Javadekar
- Venkaiah Naidu
- Smriti lrani
- Suresh Prabhu
- How many organs are in a normal human body?
- 76
- 73
- 79
- 70
- Who is the captain of the Kerala team for the Santhosh Trophy Football Tournament 2017?
- P. Usman
- Vineeth
- Shafiq
- I.M. Vijayan
- Who is known as the Nightingale of India?
- lndira Gandhi
- Mother Theressa
- Sarojini Naidu
- Sister Nivithitha
- Which of the following project studied to ensure integrated development of Children up to 6 years?
- ICDS
- RMSA
- SSA
- NSPS
- Who is known as Kerala Lincoln?
- C. Kesevan
- Pandit Karuppan
- Ayyankali
- Dr. Palppu
- Name the first person nominated from Kerala to Rajya Sabha
- Sardar K.M. Panikkar
- K.M. Chandy
- M.M. Jacob
- A.K. Antony
- Who is the author of ‘A Long Way’?
- lndira Gandhi
- Rajiv Gandhi
- A.B. Vajpayee
- P.V. Narasimha Rao
- Nagaland is also known as
- Land of festival
- Land of letters
- Land of happiness
- Land of cultural heritage
- Which Taluk in Kerala have longest sea coastal area?
- Kollam
- Cherthala
- Kozhikode
- Kannur
- Which place is known as ‘Gift of Pamba’?
- Kuttanad
- Mennachel
- Erumali
- Karuvata
- Name foreign country issue postal stamp for the sake of Sree Narayana Guru
- Nepal
- Sri Lanka
- China
- Myanmar
- Which Indian state have Common Civil Code?
- Jammu and Kashmir
- Mizoram
- Goa
- Nagaland
- Which place is famous for natural sandalwood forest in Kerala?
- Chinnar
- Mangala vanam
- Wayanad
- Marauyar
- In 1936 India start its first National Park in which state?
- Uttarakhand
- Nagaland
- Himachal Pradesh
- Mizoram
4 Comments
32.In a home TV, the lead from the antenna is
ReplyDeleteAnswer "a co-axial cable"
Now a days co axial cable is used
"a twin wire fat ribbon of 300 ohms" is used in old tv set unit. this cable is currently useless
2) In MOD-10 counter, how many flip-flop are cascaded?
ReplyDeleteAnswer is 4
How many marks did u get in dis exam?
Deletecan i get the expected cut off..
ReplyDelete