The Bharat Sanchar Nigam Limited was published recruitment notification/vigyapti BSNL JE Previous Paperfor various posts of TTA Junior Engineer Posts.

BSNL TTA questions are based on:
General Ability
Basic Engineering
Specialization


Question for BSNL Junior Engineer Exam 2015





Question for BSNL Junior Engineer Exam:

1) The Most Common Modulation System Used for telegraphy is
FSK
PSK
PCM
Single tone Modulation
Two Tone Modulation

2) VSB is an Abbreviation if vestigial Sideband, is derived by Filtering
DSB
AM
Either (a) or (b)
PM

3) The Hartely Law State that
The Maximum Rate of Information transmission depends on the Depth of Modulation
The Maximum Rate of Information Depends on the channel Bandwith
Only Binary Codes may be used
Redundancy is Essential

4) The FM Signal with a Modulation index mf is passed through a Frequency Tripler. The Wave is the Out Put of the Tripler will have a modulation Index of
Mf 9
Mf 3
Mf
3 Mf
9 Mf

5) In high power AM transmission, Modulation is done at
Buffer Stage
Oscillator Stage
RF Stage
IF Stage

6) Vacuum Tube Eventually Fall at Microwave Frequencies Because of their
Inter Electrode Capacitance
Small Series inductance
Large Shunt Capacitance
Short Transit Time
Increase Noise Figure

7) The Biggest Disadvantage the IMP ATT Diode has is its
Low Efficiency
High Noise
Low BW
Inutility to provide Pulse Operation
Low Power handling Ability

8) In AM transmission the Frequency, Which is not transmitted is
Carrier Frequency
Audio Frequency
Upper Side Frequency
Lower Side Frequency

9) FM Broadcast band lies in
VHF
UHF
SHF
HF

10) The Modulation System inherently is most Noise Resistant in
SSB Suppressed carrier
FM
PPM
PCM