(Test Paper – II) 120 Free Preparation Previous Year Questions BSNL TTA (JE) 2016

BSNL JE TTA Recruitment Examination
 

Test Paper – II



1. 1. Reactive current through the capacitive load produces a) Magnetic field b) Electric field c)
Supermagnetic field d) None


2. 2. One of the following which gives piero-electric effect is a) Mu metal b) PVDF c) Sapphire
d) Ferrites


3. 3. PZT piezo-electric materials have a) Higher curie temperature b) Lower curie temperature c)
Absolute temperature d) None



4. 4. The residual resistivity of a binary alloy at OK is a) The sum of the residual resistivities of
the component metals b) The difference of the residual resistivities of the component metals. c) The
product of the residual resistivities of the component metals d) Dependent on the concentration of the
minor component in the alloy


5. 5. In active filter circuits, inductances are avoided mainly because they a) Are always
associated with some resistance b) Are bulky and unsuitable for miniaturisation c) Are non-linear in
nature d) Saturate quickly



BSNL Junior Engineer (Erstwhile TTA) Practice Workbook 2016-17 (36.5.1) (English)


6. 6. The depletion layer across a p-n junction lies a) mostly in the p-region b) mostly in the
n-region c) equally to both p and n region d) entirely in the p-region


_ .7. The voltage induced in a loop of wire rotating in a strong and steady magnetic field is a)
pulsating dc b) dc c) rectified ac
_ .d) ac



7. 8. One of the following types of capacitor which is polarized is a) Electrolytic b) Ceramic c)
Paper d) Mylar



8. 9. Electric shock is-a) Always fatal b) Never fatal c) Sometimes fatal d) Always disfiguring


9. 10. A typical value of filter capacitor for 50 Hz ripple is a) 16mF b) 10F c) 10mF d) None


10. 11. A telephone relay armature is made of material with a) High electrical conductivity b) Low
electrical conductivity c) Negligible conductivity d) None





11. 12. Larger the value of filter capacitor a) Larger is the peak-peak value of ripple voltage b)
Larger is the peak current in the rectifying diode c) Longer is the time that current pulse flows
through the diode d) Smaller is the dc voltage across the load


12. 13. Barrier potential in a P-N junction is caused by a) Thermally generated electrons and
holes b) Diffusion of majority carriers across the junction c) Migration of minority carriers across the
junction d) Flow of drift current


13. 14. The polarity of VGS for E-only MOSFET is a) positive b) negative c) zero d) depends on
P or N channel


_ .15. The following which will serve as a donor impurity in silicon a) Boron
_ .b) Indium c) Germanium d) Antimony



14. 16. When bias applied to a vari-cap diode is increased, its capacitance a) is decreased b) is
increased c) remains constant d) first increases and then decreases.


15. 17. In case of a bipolar transistor a is a) positive and greater than 1 b) positive and less than 1
c) negative and greater than 1 d) negative and less than 1





16. 18. A BJT is a) not very sensitive to radiations b) very sensitive to radiations. c) independent
of radiations d) none


17. 19. An SCR may be considered to be a) 2 diodes b) 3 diodes c) 4 diodes d) 5 diodes


18. 20. For a BJT, under the saturation condition a) IC = bIB b) IC > bIB c) IC is independent of
all other parameters d) IC < bIB


19. 21. In modern MOSFET’s the material used for the gate is a) High purity silicon b) High
purity silica c) Heavily doped polycrystalline silicon d) Epitaxial grown silicon



20. 22. Find the Norton's equivalent of the circuit given below
_ .23. When the source in the circuit shown is a sinusoidal source then the input voltage is a) 10V b)
5V_ .c) 27V d) 24V





21. 24. The time constant of the network shown in the given figure is given by


22. 25. The voltage transfer ratio of two-port networks connected in cascade may be
conveniently obtained from the a) product of the individual ABCD matrices of the two networks b)
product of voltage transfer ratios of the two individual networks c) sum of the Z- matrices of the two
networks d) sum of the h – matrices of the two networks


23. 26. When a network has response with time as shown in fig. then which one of the following
diagrams represents the location of the poles of this network ?



24. 27. For the network shown in the given fig. the ratio is


25. 28. An attenuator drops a 10V signal to 50mv in an experiment. The loss in decibels is a)
–40dB b) –6dB c) –55dB d) –60dB






26. 29. When the network has 10 nodes and 17 branches then the number of different node pair
voltages would be a) 7 b) 9 c) 10 d) 45


27. 30. The circuit shown in the following fig. will act as an ideal current source with respect to
terminals A and B when frequency is a) zero b) 1rad/s c) 4rad/s d) 16rad/s


31.When a short vertical grounded antenna is required to radiate at 1MHz and the effective height of
the antenna is 30 m then the calculated value of the radiation resistance is a) 1.58 W b) 158 W c) 15.8
W d) None of these


32. Shannon’s law relates
a) antenna gain to bandwidth b) frequency to antenna gain c) antenna gain to transmission
losses d) information carrying capacity to S/N ratio


2. 33. One of the following modes which has the characteristic of attenceation becoming less as
the frequency is increased and is attractive at microwave frequencies of circular cylindrical wave

BSNL Junior Engineer (Erstwhile TTA) Practice Workbook 2016-17 (36.5.1) (English)

guides is a) TE1 mode b) TM01 mode c) TE01 mode d) Higher order mode


34.For a transmission line, the propogation constant, for a TEM wave travelling in it is
given by (Where the symbols have the usual meanings ) a) [ (R+jwL) (G+jwc)]
b) [ R+jwL) (G+jwc)] ½
c) [ (R-jwL) (G + jwc) ] ½
d) [(R-jwL) ( G+jw2c)]1/3









2. 3. Higher operating frequencies possible a) 1 and 2 b) 1 and 3 c) 2 and 3 d) 1,2 and 3



3. 36. When a 75 ohm transmission line is to be terminated in two resistive loads R1 and R2
such that the standing pattern in the two cases have the same SWR , then the values of R1 and R2 (in
ohms) should be a) 250 and 200 respectively b) 225 and 25 respectively c) 100 and 150 respectively
d) 50 and 125 respectively



4. 37. The degenerate modes in a wave guide are characterized by a) Same cut off frequencies
but different field distribution b) Same cut off frequencies and same field distributions c) Different
cut off frequencies but same field distributions d) Different cut off frequencies and different field
distributions


38.A TEM wave impinges obliquely on a dielectric-dielectric boundary with Er1=2 and Er2=1, the
angle of incidence for total reflection is a) 30 0 b) 60 0 c) 45 0 d) 90 0


1. 39. The radiation pattern of Hertzian dipole in the plane perpendicular to the dipole is a a)
Null
b) Circle
c) Figure of eight
d) None of the above


2. 40. Permeance is the a) square of reluctance
b) reluctance
c) reciprocal of the reluctance
d) cube of the reluctance.






3. 41. One of the following which is an active transducer is a) Photoelectric
b) Photovoltaic
c) Photo-conductive
d) Photo emission



4. 42. The wein bridge uses only a) Inductors
b) Capacitors
c) Resistors
d) Capacitors and Resistors.



5. 43. The greater the value of Q a) higher will be the bandwidth of the resonant circuit.
b) smaller will be the bandwidth of the resonant circuit.
c) nothing can be said)
d) none.


6. 44. The most serious source of error in a) c) bridge measurement is a) eddy currents
b) leakage currents
c) residual imperfectness
d) stray fields.



7. 45. Moving iron instruments a) have a linear scale
b) do not have a linear scale
c) both a and b)
d) none.



8. 46. If accuracy is the main consideration, which one of the following voltmeters should one
select a) 100 v ; 2 mA b) 100 v ; 100 ohm/volt c) 100 v ; 1mA d) 10,000 v ; 10 mA
9. 47. In dc tacho generators used for measurement of speed of a shaft, frequent calibration has
to be done because a) the contacts wear off b) the strength of permanent magnet decreases with age
c) the armature current produces heating effect d) there is back emf.



10. 48. Ideal transformer cannot be described by a) h parameters b) ABCD parameters c) G
parameters d) parameters






11. 49. Consider the following statements A3- phase balanced supply system is connected to a 3
phase unbalanced load) Power supplied to this load can be measured using
1. 1. Two wattmeters
2. 2. One wattmeter
3. 3. Three wattmetersWhich of these statements is/are correct? a) 1 and 2 b) 1 and 3 c) 2 and 3
d) 3 alone



4. 50. The function of the reference electrode in a pH meter is to a) Produce a constant voltage
b) Provide temperature compensation c) Provide a constant current d) Measure average pH value


_ .51. Match the column A (Devices) with column B (Characteristics) and select the correct answer
by using the codes given below the column Column A Column B A) BJT 1. Voltage controlled
negative resistance B) MOSFET 2. High current gain C) Tunnel diode 3. Voltage regulation D)
Zener diode 4. High input impedance


5. 52. A thyristor during forward blocking state is associated with.-
a) large current , low voltage.
b) low current , large voltage.
c) medium current , large voltage
d) low current, medium voltage.



6. 53. In controlled rectifiers, the nature of load current i.e. whether load current is
continuous or discontinuous a) does not depend on type of load and firing angle delay
b) depends both on the type of load and firing angle delay
c) depends only on the type of load)
d) depends only on the firing angle delay.



7. 54. A single phase voltage controller feeds power to a resistance of 10 W . The source
voltage is 200 V rms. For a firing angle of 900 , the rms value of thyristor current in
amperes is a) 20
b) 15
c) 10
d) 5



8. 55. In the performance of single phase and three phase full converters the effect of source
inductance is to
a) reduce the ripples in the load current b) make discontinuous current as continuous
c) reduce the output voltage
d) increase the load voltage.






9. 56. The cycloconverters (CCs) require natural or forced commutation as under a) natural
commutation in both step up and step down CCs
b) forced commutation in both step up and step down CCs
c) forced commutation in step up CCs
d) forced commutation in step down CCs


10. 57. Power transistors are more commonly of a) silicon npn type.
b) silicon pnp type.
c) silicon nnp type.
d) silicon npp type.


11. 58. C is a -
a)Middle level language
b) High level language
c) Low level language
d) None of above


12. 59. What will be output of programmain ( )
{ int i ;
print f ("Enter value of i");
scant ("%d", & i);
if ( i = 5 )
print f ("you entered 5");
else
print f ("you entered %d", i ); }
if user entered 100 then
a) 5
b) 100
c) 1005
d) None



13. 60. (7F)16 + (BA)16 = (?)16a) 481
b) 139
c) –481
d) –139



14. 61. Two’s complement of 3 bit nonzero linory number is some or original number is all
bits acceptsa)
MSB are zeros
b) LSB are zeros
c) MSB are ones
d) LSB are ones.






15. 62. The schematic circuits of RTL NOR gate is



_ .63. Transistors with high frequency have a) Thick base
_ .b) Thin base c) Some other feature d) None of the above



16. 64. Telephone traffic is specified in terms of a) Average waiting time b) Grade of service c)
Peak waiting time d) Erlangs



17. 65. In a Hartley oscillator a) Necessary phase relation is obtained by connecting grid and
plate electrodes to the opposite ends of the tuned circuit. b) The mutual inductance must have the
appropriate polarity. c) Both grid circuit and plate tuned circuit offer inductive reactance d) None of
the above


66.The condenser C is charged in a bootstrap sweep generator a) Linearly but the discharge is non
linear b) Non linearly but the discharge is linear c) Linearly and the discharge is linear d) Non
linearly and the discharge is non linear



67.In an audio amplifier audio signals become garbled and hence difficult to understand when an ac
input current is large enough to drive the output to a) saturation only b) Cut off only c) Either
saturation or cut off d) A value off the load line



1. 68. Five 1 bit registers are referred as a) Flags
b) Slags
c) Tags
d) None of the above



BSNL Junior Engineer (Erstwhile TTA) Practice Workbook 2016-17 (36.5.1) (English)

2. 69. Next binary number after 0,1, 10, 11 is a) 12
b) 101
c) 100
d) 110



3. 70. Identify coincidence logic circuit in the following –
a) b)
c) d)





72. If an inverter is placed at the input to an SR flip flop, the result is a) T flip flop b) D flip flop c)
JK flip flop d) BCD decade counter



73. See the Root locus diagram of a system and the following statements :
1. The open loop system is a second order system.
2. The system is over damped for
3. The system is absolutely stable for all value of R.Which of these statements are correct?
a) 1, 2, & 3
b) 1 and 3
c) 2 and 3
d) 1 and 2



74. For the transfer function G(S)H(S) = the phase cross over frequency is a) 0.5 rad/sec b) 0.707
rad/sec c) 1.732 rad/sec d) 2 rad/sec BSNL GE JTO Recruitment Examination previous years 2007
2008 Question Paper free donwload online. solutions coming soon!
75. If the open loop transfer function of the system is G(S) H(S) =
then a closed loop pole will be located at S = -12 wher the value of K is a) 4355
b) 5760
c) 9600
d) 9862



76. Considering the following open loop transfer function The correct sequence of these systems in
increasing order of the time taken for the unit
step response to settle is –
a) 1, 2, 3
b) 3, 1, 2
c) 2, 3, 1
d) 3, 2, 1.



77. Considering unit feed back control system in the given figure, the ratio of time
constant of closed loop response to open loop response will be
a) 1 : 1
b) 2 :1
c) 3 : 2
d) 2 : 3



78. Angle subtended by earth at geostationary communication satellite is a) 17.340 b) 51.40 c) 1200
d) 600
79.For data transmission phase modulation is commonly used because a) Phase can be varied from
+1800 to -1800 b) It is resistant to the effects of noise. c) Demodulation is very easy d) It gives
highest data rates that can be transmitted over a given channel.



80 . Several channels are interleaved and then transmitted together is known as – a) Frequency
division multiplex b) Time division multiplex c) A group d) A super group



1. 81. Identify the wrong statement-The radar cross section of a target a) Depends on the
frequency used b) May be reduced by special coating of the target c) Depends on the aspect of a
target, if this is non spherical d) Is equal to the actual cross-sectional area for small targets.



2. 82. Considering following parameters
1. 1. Loss in the media) 2. Permeability of the media) 3. Frequency of the wave 4. Velocity of
the wave. Which of these parameters are responsible for the change of phase of a propagating
electromagnetic wave? a) 1, 2, and 3 b) 2, 3 and 4 c) 1, 3 and 4 d) 1 and 4



2. 83. In super heterodyne receivers double spotting is caused by a) poor front-end rejection b)
misalignment of receiver c) detuning of one or more IF stages. d) non functioning of AGC



84. The number of lines per field in the United States TV system is a) 262 1/2 b) 525 c) 30
d) 60
3. 85. In a TV receiver the color killer a) cuts off the chroma stages during monochrome
receivers. b) ensures that no color is transmitted to monochrome receivers c) prevents color
overloading d) makes sure that the color burst is not mistaken for sync pulses, by cutting off
reception during the back porch.



4. 86. The nominal capacitance of a coaxial RF cable is of 40 pF/m and the characteristic
impedance of 50W. The inductance of the cable is-a) 1mH/m b) 10 mH/m c) 0.1 mH/m d) 0.01
mH/m






5. 87. Transmission of wave through Dominant mode is a) distortion less transmission b)
generates undesirable harmonic distortion c) having loss of power d) None of above.



6. 88. Lower the standing wave ratio (SWR) a) Greater mismatch error b) Lower mismatch
error c) No effect on matching d) Moderate mismatch error



7. 89. In klyrtron oscillator for getting wide range of oscillations resonators should be a)
Critically coupled b) Under coupled c) Over coupled d) No coupling required



8. 90. The critical frequency is always a) Lower than maximum usable frequency b) Equal to
maximum usable frequency c) Higher than maximum usable frequency d) None of above



9. 91. The PIN diode based on a) Nonlinear resistance b) Nonlinear reactance c) Negative
resistance d) Controllable impedence



10. 92. Which antenna having circular polarization a) Horn antenna b) Lens antenna c) Helical
antenna d) Discone antenna



11. 93. The i/p S/N ratio of system is 50 and the o/p S/N ratio is 5 the noise figure is a) 250 b) 55
c) 10 d) 45



12. 94. In the 8085 mP, the RST 6 instruction transfers the program execution to the following
location a) 30 H b) 24 H c) 48 H d) 60 H



13. 95. In instruction cycle first operation is a) Memory read b) Address read c) Opcode fetch d)
Data read



14. 96. CMP instruction comes under group a) Data transfer b) Branching operations c) Machine
control operation d) Logical operations.



97.In which logic operation does not effect any flags a) ANA B
b) ORA B
c) XRI A2H
d) CMA






98.What happen when CALL instruction executed a) Data retrieved from stock to register
b) Data from register saved on the stock.
c) 16 bit address of instruction saved on stock
d) 16 bit address from stock retrieved)



99 The mark status of mark able interrupts is defined according to content of a) stack pointer.
b) HL register .
c) Program counter
d) Accumulator


100.The decoder is a logic ckt that a) Amplifies the current or power at i/p.
b) Identifies each combination of the signals present at i/p
c) Provides appropriate code as o/p for each i/p signal
d) Both b & c)



101. The young man was quickly promoted when his employers how --------------- he was
-
a) indigent
b) indifferent
c) assiduous
d) cursory.



102. As letter is alphabet so zodiac is a) almanac
b) beacon
c) sign
d) signal.



103.What is the correct meaning of prudish.?
a) careful
b) fast
c) God
d) brave



104. Pick out the odd matching with reference to number a) woman – women.
b) hair – hairs
c) child – children.
d) foot – feet.



105.Choose the phrase that is most nearly similiar in meaning to the word given below-
Abut is
a) Stimulate
b) Grasp
c) Oppose
d) Adjoin






106. The highest mountain peak in Indian Territory is a) Mount
Everest
b) Kanchenjunga
c) Nanda Devi
d) Mount Kailash



107. German silver is an alloy comprising a) Copper, Nickel and Zinc b) Silver, copper and Zinc c)
Silver Nickel and Zinc d) Nickel, Zinc and Lead



108. Mughal Emperor Bahadur Shah Zafar’s mausoleum is in a) Delhi b) Lahore c) Yangon d) Agra

109. On which date the World Trade Centre in New York and Pentagon in Washington d)C was
attacked by terrorist a) 12 September 2001 b) 11 September 2001 c) 11 July 2001 d) 20 December
2001



110. India defeats South Africa in the finals of the inaugural champions challenge Hockey
Tournament in Kualalumpur by a) 4-2 b) 2-0 c) 3-2 d) 2-1



111.Which planets in the solar system are known as ‘Inferior Planets’ a) Earth and Mars b) Earth and
Mercury c) Mars and Mercury d) Mercury and Venus.



112. The largest Stupa in Southern India is at a) Nellore b) Amravati c) Tanjore d) Kozhikode



113. The new chairman and Managing Director of Industrial Finance Corporaton of India (IFCI) is a)
Mr. Vishwanath Prasad Singh b) Mr. Jitendra Patil c) Mr. Ragh d) Mr. Shubhash chand Jain 114.
Which one is the latest among rock-cut temples? a) Ajanta b) Ellora c) Elephanta d) All originated in
the same period)

BSNL Junior Engineer (Erstwhile TTA) Practice Workbook 2016-17 (36.5.1) (English)



115. Number of organisations government ban in Jammu and Kashmir and the North East under the
new ordinance ‘POTO’ is a) 20 b) 21 c) 22 d) 23



116. In bed of which river does Badrinath shrine stand? a) Ganga b) Mandakini c) Alakananda d)
Bhagirathi



117. The nerve endings for the sense of sight are located in the part of the eye called the a) Cornea b)
Sclera c) Iris d) Retina



118. Fundamental duties were introduced in the constitution by the a) 40th Amendment b) 42nd
Amendment c) 43rd Amendment d) 44th Amendment



119. The Khalsa Panth was founded by a) Guru Hargovind b) Guru Nanak Dev c) Guru Tegh
Bahadur d) Guru Govind singh



120. Number of countries involved in international fleet review hosted by India is a) 27 b) 28 c) 29 d)
30





Comments

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