Related Questions

Most of the amplification in a superhetrodyne receiver occurs at ___________ stage
A IF
B RF amplifier
C Audio amplifier
D Detector
In a superhetrodyne receiver, the difference frequency is chosen as the IF rather than the sum frequency because ___________
A The difference frequency is closer to oscillator frequency
B Lower frequencies are easier to amplify
C Only the difference frequency can be modulated
D None of the above
The superhetrodyne principle provides selectivity at ___________ stage
A RF
B IF
C audio
D Before RF
In a radar-set receiver, the usual mixer stage is
A And FET
B A tunnel diode
C A silicon crystal
D A Rochelle salts crystal
In a mixer, the quantity, (v. L/D) is termed as __________ number(where, v = longitudinal velocity of material, L = length of the mixer, D = diffusivity in axial mixing).
A Weber
B Peclet
C Brinkman
D Schmidt
Four defensive football players are chasing the opposing wide receiver, who has the ball. Calvin is directly behind the ball carrier. Jenkins and Burton are side by side behind Calvin. Zeller is behind Jenkins and Burton. Calvin tries for the tackle but misses and falls. Burton trips. Which defensive player tackles the receiver?
A Burton
B Zeller
C Jenkins
D Calvin
For a two stage compressor, if index of compression for higher stage is greater than index of compression for lower stage, then the optimum pressure as compared to ideal case will
A Increase
B Decrease
C Remain unaffected
D Other factors control it
What is the local oscillator (mixer) frequency of the satellite with an uplink frequency in GHz band?
A 3500 MHz
B 4500 MHz
C 2225 MHz
D 2555 MHz
Mixing mechanism employed in a pan mixer is by
A Mulling
B Kneading
C Dispersion
D None of these
Lower part of hot metal mixer are lined with __________ bricks.
A Superduty fireclay
B High alumina
C Silica
D Carborundum

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