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EIL Management Trainee Question Paper - Electronics
1. Power diode is generally made from
a) Silicon
b) Germanium
c) Both
d) None of these
2. When the both junction of NPN diode is reverse biased, then the diode is in which mode
a) Active
b) Cutoff
c) Saturation
d) inverted
3. Which transistor mode gives the inverted output
a) Common Emitter
b) Common Base
c) Common Collector
d) None of these
4. Which coupling gives the higher gain in case of amplifier
a) Capacitor coupling
b) Impedance coupling
c) Transformercoupling
5. Which distortion is least objectionable in audio amplification
a) Phase
b) Frequency
c) Harmonic
d) Intermediation
6. A narrow band amplifier has a band pass nearlyâ¦â¦â¦â¦of central frequency
a) 33.3%
b) 10%
c) 50%
7. Phase shift oscillator consists
a) RL
b) RC
c) RLC
8. Multivibrater Produces
a) Sine wave
b) Square wave
c) Smooth wave
d) sawtooth
9. Convert the 101101 Binary number into octal no
a) 65
b) 55
c) 51
d) 45
Ans: 55
10. 10 in BCD
a) 10100
b) 1100
c) 010111
d) None of these
Ans: None of these
11. Which PNP device has a terminal for synchronizing purpose
a) SCS
b) Triac
c) Diac
d) SUS
12. Addition of indium in semiconductor crystal makes
a) PNP
b) NPN
13. Free electron exists in which band
a) 1
b) 2
c) 3
d) Conduction band
14. Ripple factor of half wave rectifier
a) 1.21
b) 0.48
c) 0.5
15. Transistor that can be used in enhancement mode
a) NPN
b) UJT
c) JFET
d) MOSFET
16. Following contributes to harmonic distortion in Amplifier
a) +Ve feedback
b) âVe feedback
c) Defective active device
17. High cutoff frequency
a) CB
b) CC
c) CE
18. Which is used as data selector?
a) Encoder
b) Decoder
c) modulator
d) Demodulator
19. Read write capable memory
a) RAM
b) ROM
c) Both
d) None of these
20.the radix or base of hexadecimal number system is ââââ
a) 8
b) 16
c) 5
d) none of these
Ans: 16
21.the no of 1âs in the binary representation of the expression 162*9+162*7+16*5+3 are
a) 10
b) 23
c) 6
d) 4
22. the no of latches in F/F are ââ-
a) 1
b) 2
c) 3
d) 4
23.how many flip-flops are required to construct Mod -12 counter
a) 5
b) 4
c) 12
d) none
Ans: 4
24. which logic gate has the output is compliment of its input âââ-
a) OR
b) AND
c) NOT
d) X-OR
Ans: NOT
25.no.of 2-input multiplexers needed to construct a 210 input multiplexerâ¦â¦.
a) 12
b) 31
c) 20
d) 16
26.By adding inverters to the inputs and output of a AND gate we can obtain â¦â¦â¦â¦â¦
a) OR
b) AND
c) NOT
d) X-OR
Ans: X-OR
27.how many NAND gates are needed to realize OR gate âââââ
a) 1
b) 2
c) 3
d) 4
Ans: 3
28.which is the first integrated logic family âââââ
a) RTL
b) DTL
c) TTL
d) none of these
29. Which logic gate has output high if and only if all inputs are low âââ?
a) NOR
b) NAND
c) X-NOR
d) AND
Ans: NAND
30.According to Boolean algebra 1+A+B+C =
a) A
b) A+B+C
c) 1
d) none of these
Ans: 1
31. If a=0x6db7 and b=0x2ae9 then what is the value of aâbâââââ
a) binary number for 1001.1101?
b) decimal number for 19?
c) excess-3 code for 29?
32.what is the value of Aâ+1 ?
a) A
b) Aâ
c) 1
d) none of these
Ans: 1
33.2 in 4 bit number one bit indicates sign of the number then the locations are from
a) -8 to 8
b) -7 to 7
c) -16 to 16
d) None
34.Avalanche photo diode is used when compared to PIN diode bcz
a)larger band width
b)high sensitivity
35.some non zero DC voltage is to RC low pass circuit then the DC voltage in the output contains
a) Same as in input
b) Higher than input
c) Zero
d) Slightly increases
36.if the output of the gate is always high then the gates applied to this logic are 0,0
a) NAND and EX-NOR
b) NAND and NOR
c) AND and X-NOR
d) OR and XOR
Ans:a
37.Thermal Run away is not possible in FET bcz the flow of
a)minority careers
b)Transconductance
c)none
Ans : minority careers
38.which of the following is/are true about 1âs and 2âs compements:
i)In 1âs complement form. 0 has two representations
ii)in 1âs complement, the magnitude of lowest number is equal to the magnitude of highest number
iii)In 2âs complement, 0 has two representations
a) i only
b) i and ii
c) iii only
d) all of these
39.In the hybrid parameter model of a transistor reverse transfer voltage ratio and forward transfer current ratio are respectively given by:
a) h11 and h21
b) h12 and h11
c) h21 and h11
d) None of these
40.The largest negative no can be represented with 8 bits in 2âs compliment representation?
a)-256
b)-255
c)-127
d)-128
Ans: -128
