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Old 13th August 2014, 01:44 PM
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Default Previous year papers of Nuclear Power Corporation of India Ltd ET of Chemical Enginee

Will you please share with me the previous year papers of Nuclear Power Corporation of India Ltd ET of Chemical Engineering?
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Old 13th August 2014, 01:59 PM
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Default Re: Previous year papers of Nuclear Power Corporation of India Ltd ET of Chemical Eng

As you want to get the previous year papers of Nuclear Power Corporation of India Ltd ET of Chemical Engineering so here it is for you:

Q. Power diode is generally made from
a) Silicon
b) Germanium
c) Both
d) None of these

Q. 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

Q. Which transistor mode gives the inverted output
a) Common Emitter
b) Common Base
c) Common Collector
d) None of these

Q. Which coupling gives the higher gain in case of amplifier
a) Capacitor coupling
b) Impedance coupling
c) Transformercoupling

Q. Which distortion is least objectionable in audio amplification
a) Phase
b) Frequency
c) Harmonic
d) Intermediation

Q. A narrow band amplifier has a band pass nearly…………of central frequency
a) 33.3%
b) 10%
c) 50%

Q. Phase shift oscillator consists
a) RL
b) RC
c) RLC

Q. Multivibrater Produces
a) Sine wave
b) Square wave
c) Smooth wave
d) sawtooth

Q. Convert the 101101 Binary number into octal no
a) 65
b) 55
c) 51
d) 45

Ans: 55

Q. 10 in BCD
a) 10100
b) 1100
c) 010111
d) None of these

Ans: None of these

Q. Which PNP device has a terminal for synchronizing purpose
a) SCS
b) Triac
c) Diac
d) SUS

Q. Addition of indium in semiconductor crystal makes
a) PNP
b) NPN

Q. Free electron exists in which band
a) 1
b) 2
c) 3
d) Conduction band

Q. Ripple factor of half wave rectifier
a) 1.21
b) 0.48
c) 0.5

Q. Transistor that can be used in enhancement mode
a) NPN
b) UJT
c) JFET
d) MOSFET

Q. Following contributes to harmonic distortion in Amplifier
a) +Ve feedback
b) –Ve feedback
c) Defective active device

Q. High cutoff frequency
a) CB
b) CC
c) CE

Q. Which is used as data selector?
a) Encoder
b) Decoder
c) modulator
d) Demodulator

Q. Read write capable memory
a) RAM
b) ROM
c) Both
d) None of these

Q.the radix or base of hexadecimal number system is ———–
a) 8
b) 16
c) 5
d) none of these

Ans: 16

Q.the no of 1’s in the binary representation of the expression 162*9+162*7+16*5+3 are
a) 10
b) 23
c) 6
d) 4

Q. the no of latches in F/F are ——-
a) 1
b) 2
c) 3
d) 4

Q.how many flip-flops are required to construct Mod -12 counter
a) 5
b) 4
c) 12
d) none

Ans: 4

Q. which logic gate has the output is compliment of its input ———-
a) OR
b) AND
c) NOT
d) X-OR

Ans: NOT

Q.no.of 2-input multiplexers needed to construct a 210 input multiplexer…….
a) 12
b) 31
c) 20
d) 16

Q.By adding inverters to the inputs and output of a AND gate we can obtain ……………
a) OR
b) AND
c) NOT
d) X-OR

Ans: X-OR

Q.how many NAND gates are needed to realize OR gate ————–
a) 1
b) 2
c) 3
d) 4

Ans: 3

Q.which is the first integrated logic family —————
a) RTL
b) DTL
c) TTL
d) none of these

Q. Which logic gate has output high if and only if all inputs are low ———?
a) NOR
b) NAND
c) X-NOR
d) AND

Ans: NAND

Q.According to Boolean algebra 1+A+B+C =
a) A
b) A+B+C
c) 1
d) none of these

Ans: 1

Q. If a=0x6db7 and b=0x2ae9 then what is the value of a”b————–
a) binary number for 1001.1101?
b) decimal number for 19?
c) excess-3 code for 29?

Q.what is the value of A’+1 ?
a) A
b) A’
c) 1
d) none of these

Ans: 1

Q.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

Q.Avalanche photo diode is used when compared to PIN diode bcz
a)larger band width
b)high sensitivity
C)——-
d)——–

Q.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

Q.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

Q.Thermal Run away is not possible in FET bcz the flow of
a)minority careers
b)Transconductance
c)_____
d)none

Ans : minority careers
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