Que. 1      Tropospheric scatter is used with freq. in
A         HF
B         VHF
C         UHF
D         VLF

Que. 2     Higher value of SWR signifies
A         higher ohmic lossless
B         higher ohmic lossless and possibility of insulation breakdown
C         higher radiation resistance
D         none of these

Que. 3     A transmission line quarter wave section is used to reject an interfering
freq. of       100mhz its approximate length is
A         3m
B         1.5m
C         75cm
D         none of these

Que. 4     The quarter wave monopole at a freq. of 1mhz has a length of
A         1m
B         75m
C         150m
D         225m

Que. 5     medium wave radio signal may be received at for off distance at night
because
A         radio wave travels faster at night
B         ground wave attenuation is low at night
C         the sky wave is stronger at night
D         there is no fading at night

Que. 6     For a dipole antenna
A         The radition intensity is maximum along the normal to the dipole axis
B         The current distribution along its length is uniform ieeespective
of the length
C         The effective length equals its physical length
D         The input impedance is independent of the location of the feed point

Que. 7     The polarization of electromagnetic wave is
A         the direction of electric and magnetic field
B         the direction of electric  field
C         the direction of  magnetic field
D         none of above

Que. 8     Telex is a
A         Telephone services between various subscriber
B         Teleprinter services between various subscriber
C         Television services between various subscriber
D         Telegraph services between various subscriber

Que. 9     The purpose of peak clipper ckt in radio transmitter is to
A         reduce bandwidth
B         increase bandwidth
C         prevent over modulation
D         regulate oscillator input voltage

Que. 10     The current distribution of a half wave dipole is
A         uniform
B         sinusoidal
C         triangular
D         complex