TECHNICAL SECTION -II

1. 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
2. . 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
3. 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
4. Major advantage of TWT over a klystron lies in its   
a) higher bandwidth
b) higher output
c) higher frequency
d) higher gain
5. The op-map circuit shown in the given figure can be used for


 
 
 
 
 
 
 
 
a)addition

b) subtraction
c) both addition and subtraction
d) multiplication
6. The Boolean expression for the shaded area in the given Venn diagram is


7. A lag compensator is basically a
a) high pass filter
b) band pass filter
c) low pass filter
d) band elimination filter
8. Transfer function T (S) of the system in the given fig is-

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
10. If the rotor is resistance and reactance are respectively R and X1 its length and diameter are L and D for two phase a) c) servomotor, then-
a) X/R and L/D are both are small
b) X/R is large but L/D is less
c) X/R is less but L/D is large
d) X/R and L/D both are large
11. In a PID controlles the transfer function G(s) is-
a) K(1+1/Tis+Tds)
a) K(1+Tis+Tds)
a) K(1+1/Tis+1/Tds)

a) K(1+Tis+1/Tds)
12. Transfer function 600/ S(S+1)(S+15)(S+20) can be approximated by the system-
a) 2/ S(S+1)
b) 40/ (S+20)(S+1)
c) 40/ S(S+20)
d) 600/ SS+15)(S+20)
13. The transfer function of an amplifier is given
Av = Vo/Vs = 2810/(1+J*f/5.85* 10^5) ((1+J*f/5.85* 10^6)
The high 3 db frequency of an amplifier will be approximately-
a) 5850 kHz
b) 585 kHz
c) 5850 Hz
d) 585 Hz
14. An open loop transfer function is given by
K(S+3)/S(S+5) Its loci will be-

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
16. 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
17. . 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
c) compradors
d) repeaters.
18. 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
19. Mark out transferred electron device in the following-
a) BARITT dived
b) IMPATT dived
c) Gunn divde
d) Step recovery diode
20. In the output of a normal monochrome receiver video detector voltages, which are not found, are -
a) syne
b) video
c) sweep
d) sound
21. 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
22. 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
a) (D1+D2)/2x
b)(D1^2.D2^2)/2x
c)(D1^2+D2^2)/x
d)(D1^2+D2^2)/8x
23. . 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
24. Iris is used to ?
a) Over come power loss
b) Over come bending effect
c) Over come mismatch error
d) Over come twist effect
25. In schotty barrier diode current flows because of
a) Majority carriers
b) Minority carriers
c) Majority and minority carriers
d) None
26. . Which antennas are used in microwave communication
a) long wave antennas
b) Rhombic antennas
c) Parabolaidal antennas
d) All of above
27. 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
28. No of T-state required for memory read or write operation-
a) 2
b) 3
c) 4
d) 6
29. In 8089  data transfer operation which flag get affected)-
a) 3140 flog.
b) carry flog
c) sign flog.
d) none
30. In flowchart which figure represents process like subroutine-


a) last in first out
b) first in first out
c) random in random out
d) none
32. . 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.
33. 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
34. . Program execution hierarchy decides which operator-
a) is most important
b) is used first
c) is fastest
d) operators on largest number
35. (375)10 = (----)8
a) 550
b) 557
c) 567
d) 577
36. To obtain 2048 8 memory using 128 8 memory chip how many IC required-
a) 2
b) 4
c) 8
d) 16
37. A Decimal no. 17 can be converted in binary, the binary no. will be.-
a) 10001
b) 01110
c) 00111
d) 11100
38. Is the Universal logic gate-
a) AND
b) OR
c) NAND
d) X-OR
39. 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
40. For designing binary counter which flip flop is preferred -
a) T FF
b) SR FF
c) D FF
d) JKFF