Solved Paper Of DRDO

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Electronic

Two coils in differential connection have self-inductance of 2 mH and 4 mH and a mutual inductance of 0.15 mH. The equivalent inductance of the combination is
A. 5.7 mH
B. 5.85 mH
C. 6 mH
D. 6.15 mH.


The difference between the indicated value and the true value of a quantity is known as
A. Gross error
B. Absolute error
C. Dynamic error
D. Relative error

The principles of homogeneity and super-position are applied to :
A. linear time variant systems
B. non-linear time variant systems
C. linear time invariant systems
D. non-linear time invariant systems

In a 8085 microprocessor system with memory mapped I / 0,
A. I / 0 devices have 8-bit addresses
B. I / 0 devices are accessed using IN and OUT instructions
C. there can be a maximum of 256 input devices and 256 output devices.


In any transmitting antenna system, efficiency primarily depends upon
A. ohmic losses of various conductors
B. radiation resistance
C. ground conductivity
D. atmospheric conditions

An instruction used to set the carry Flag in a computer can be classified as
A. data transfer
B. arithmetic
C. logical
D. program control

The binary representation of 5.375 is
A. 111.1011
B. 101.1101
C. 101.011
D. 111.001

Dislocations in materials are
A. point defect
B. line defect
C. planer defect
D. surface defects.

In TV system, vertical pulses are separated out from horizontal pulses by the use of
A. integrator
B. differentiator
C. sweep credit
D. sync separator


200 MHz may be classified as
A. VHF
B. SHF
C. UHF
D. EHF

A communication satellite is a repeater between
A. a transmitting station and a receiving station
B. a transmitting station and many receiving stations
C. many transmitting stations and many receiving stations
D. none of the above

The power in a series R-L- C circuit will be half of that at resonance when the magnitude of
the current is equal to
A. V / 2R
B. V /
C. V /
D.

Which one out of the following instruments should be used to measure 600 kV a.c.
voltages?
A. Hot wire instrument
B. Electrostatic voltmeter
C. Moving coil voltmeter
D. Moving iron voltmeter.

Resistivity of electrical conductors is most affected by
A. temperature
B. pressure
C. composition
D. all of the above

In CCIR B-system of TV, blanking pulse is placed during
A. equalizing pulse
B. retrace interval between each line
C. retrace period of vertical line
D. none of the above

. The polarization required in ground wave propagation is
A. Horizontal (linear)
B. vertical (linear)
C. Circular
D. Elliptical

Multicavity Klystron
A. is not a microwave device
B. is not a good low level amplifier because of noise
C. is not suitable to pulse operation


The frequency modulated (FM) radio frequency range is nearly
A. 250 - 300 MHz
B. 150 - 200 MHz
C. 90 - 105 MHz
D. 30 - 70 MHz

A 32 bit microprocessor has the word length equal to
A. 2 bytes
B. 1 byte
C. 4 bytes
D. 8 bytes


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