BSNL JTO (Junior Telecom Officers) Examination Question Paper - Part - 4
BSNL Recruitment of Junior Telecom Officers (Telecom.), Junior Telecom Officers (Civil) and Junior Telecom Officers (Electrical) Previous Year Question Papers.
See the circuit shown and choose the correct option "
a) Only red will glow
b) Only green will glow
c) Both red and green will glow
d) Neither red nor green will glow
A dc to dc converter having an efficiency of 80% is delivering 16W to a load) If the converter is generating an output of 200V from an input source of 20V, then the current drawn from the source will be "
A transistor is operated as a non-saturated switch to eliminate "
a) storage time
b) turn " off time
c) turn " on time
d) delay time
The output Y of the circuit in the given figure is "
a) (A + B)C + DE
b) AB + C(D + E)
c) (A + B)C + D + E
d) (AB + C) . DE
Rotors used in a two-phase ac servomotor is "
a) solid iron motor
b) squirrel cage rotor
c) drag cup rotor
d) both b and c
Major advantage of TWT over a klystron lies in its "
a) higher bandwidth
b) higher output
c) higher frequency
d) higher gain
The op-map circuit shown in the given figure can be used for "
c) both addition and subtraction
The Boolean expression for the shaded area in the given Venn diagram is "
A lag compensator is basically a "
a) high pass filter
b) band pass filter
c) low pass filter
d) band elimination filter
Transfer function T (S) of the system in the given fig is-
The overall transfer function for a unity feedback system is
Mark the correct statement regarding this system
1. Position error constant kp for the system is 4
2. The system type one.
3. The velocity error constant kv for the system is finite.
Select the correct answer using the codes given below- Codes
a) 1,2 and 3
b) 1 and 2
c) 2 and 3
d) 1 and 3
If the rotor's resistance and reactant's are respectively R and X1 its length and diameter are L and D for two phase a) c) servomotor, then-
In a PID controllers the transfer function G(s) is-
Transfer function can be approximated by the system- The transfer function of an amplifier is given by The high 3 db frequency of an amplifier will be approximately-
a) 5850 kHz
b) 585 kHz
c) 5850 Hz
d) 585 Hz
An open loop transfer function is given by Its " loci will be-
The output signals amplitudes for 1's and 0's in an ADM transmission systems are "
a) Fixed and the repetition rate is also fixed
b) Fixed but the repetition rate is variable
c) Variable and the repetition rate is also variable
d) Variable but the repetition rate is fixed
Microwave link repeaters are typically 50km apart "
a) Because of atmospheric attenuation
b) Because of Output tube power limitations
c) Because of the earth's curvature
d) To ensure that the applied ac voltage is not excessive
The amplifier inserted at intervals to amplify the signal and compensate for transmission loss on the cable are called-
a) line amplifier
b) equalizing amplifiers
Diversity reception in used to-
a) increase receiver sensitivity
b) improve receiver selectivity
c) overcome degrading effect of fading
d) overcome degrading effect of receiver detuning
Mark out transferred electron device in the following-
a) BARITT dived
b) IMPATT dived
c) Gunn divde
d) Step recovery diode
In the output of a normal monochrome receiver video detector voltages, which are not found, are -
The HV anode supply for the picture tube of TV receiver is generated in the-
a) mains transformer
b) vertical output stage
c) horizontal output stage
d) horizontal deflection oscillator
In antenna measurements using two aperture antennas of dimensions D1 and D2 , minimum separation between the two should be (x is free space wavelength of radiation uses) The frquency range for satellite broad casting is "
a) 30 MHz " 300MHz
b) 30 MHz " 3 GHz
c) 3 GHz " 30 GHz
d) 30 GHz " 300 GHz
Iris is used to "
a) Over come power loss
b) Over come bending effect
c) Over come mismatch error
d) Over come twist effect
In schotty barrier diode current flows because of "
a) Majority carriers
b) Minority carriers
c) Majority and minority carriers
Which antennas are used in microwave communication "
a) long wave antennas
b) Rhombic antennas
c) Parabolaidal antennas
d) All of above
Among translator & time of sight system capacity "
a) Of translator is more
b) Of line of sight is more
c) Having equal capacity
d) No relation such as
No of T-state required for memory read or write operation-
In data transfer operation which flag get affected-
a) 3140 flog.
b) carry flog
c) sign flog.
The storage and retrieval of data on stacks should follow sequence-
a) last in first out
b) first in first out
c) random in random out
While executing program microprocessor checks INTR line clearing-
a) each instruction
b) after interval of two instruction
c) after a subroutine
d) at the end of program.
93. In which error check technique of data communication 2's complement of all bytes of data is transmitted with data-
a) Even parity
b) odd parity
c) check scans
d) cyclic redundancy
Program execution hierarchy decides which operator-
a) is most important
b) is used first
c) is fastest
d) operators on largest number
(375)10 = ("-)8
To obtain 2048 8 memory using 128 8 memory chip how many IC required-
A Decimal no. 17 can be converted in binary, the binary no. will be.-
Is the Universal logic gate-
A monostable state in multivibrator means-
a) which returns itself to its single stable state
b) the state used only once in circuit
c) the state of circuit can not get changed
d) the state of circuit always changing
For designing binary counter which flip flop is preferred -
a) T FF
b) SR FF
c) D FF
His handwriting was not "" so I could not read his note "
They started to "" people into the theatre only at six -
I told him to buy things that are lasting (Give the appropriate synonym of the underlined word).
Give the word which is most opposite in meaning of the word 'evident'-
I expressed by disagreement "" him on that issue-
'Sugarbowl' of the world is -
Palk strait separates-
a) India and Srilanka
b) India and Burma
c) Britain and France
d) Malaysia and Sumatra
The minimum number of atoms in a molecule of an element are-
Tides in the sea are caused by-
a) Effect of sun
b) Effect of moon
c) combined effect of moon and sun
d) Gravitational, centrifugal and centripetal forces
The Bar council of India decided to close over law colleges across the country for their failure to maintain minimum teaching standard) There number is
Aswan Dam is located in-
Ghana Birds sanctuary is in the state of -
b) Madhya Pradesh
Dry ice is-
a) Frozen carbon monoxide
b) Frozen carbon dioxide
c) Frozen ammonia
d) None of these
East flower river of India is -
The total length of the great wall of China is "
a) 1,400 miles
b) 1,500 miles
c) 1,300 miles
d) 1,400 miles
Deficiency of vitamin C may result in-
b) night blindness
Bharat Shah a film financer was granted bail by Supreme Court after a
period of "
a) 11 months
b) 2 years
c) 18 months
d) 15 months
Indian local time is based on-
a) 800 E longitude
b) E longitude
c) 1100 E longitude
d) 250 E longitude
The two days Shiv Shena Mahashivir of 2002 started at Shirdi on "
a) 9th April 2002
b) 10th April 2002
c) 8th April 2002
d) 11th April 2002
Which one is a good preservative of food?
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