## Kerala PSC Previous Years Question Paper & Answer

Title : ASSISTANT ENGINEER - SR FOR ST ONLY
Question Code : A

Page:6

Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'ASSISTANT ENGINEER - SR FOR ST ONLY' And exam conducted in the year 2016. And Question paper code was '058/2016/OL'. Medium of question paper was in Malayalam or English . Booklet Alphacode was 'A'. Answer keys are given at the bottom, but we suggest you to try answering the questions yourself and compare the key along wih to check your performance. Because we would like you to do and practice by yourself.

page: 6 out of 11
Excerpt of Question Code: 058/2016/OL

B:-39
C:-117
D:-42
Correct Answer:- Option-C
Question48:-Peak inverse voltage of a diode in centre tap full wave rectifier is
८-2४ (10
ന്ന്‌
6:۷2
D:-V_(m)2°
Correct Answer:- Option-A
Question49:-The various colours of LED can be obtained by varying the
A:-Material of the diode
B:-Cut in voltage of the diode
C:-Breakdown voltage of the diode
D:-Doping concentration of the diode
Correct Answer:- Option-A
Question50:-Determine the stability factor of a transistor with B = 100 with fixed bias is
A:-100
B:-78
C:-150
D:-101
Correct Answer:- Option-D
Question51:-The voltage buffer has
A:-Low input impedance and high output impedance
B:-High input impedance and low output impedance
C:-Low input impedance and low output impedance
D:-High input impedance and high output impedance
Correct Answer:- Option-B
Question52:-The gain of the RC coupled amplifier gets reduced at high frequencies due to
A:-Transistor
B:-Coupling capacitor
C:-Bypass capacitor
D:-Interelectrode capacitance
Correct Answer:- Option-D
Question53:-Give the output signal of a common emitter amplifier having a gain of 100 for an input signal 0.3 cos (200t)
A:-3 cos (200t)
B:-30 cos (200t + 90°)
C:-30 cos (200t + 180°)
D:-100 cos (200t + 90°)
Correct Answer:- Option-C
Question54:-Heat sinks are used in power amplifier circuits to
A:-Decrease output power
B:-Increase output power
C:-Increase collector dissipation rating of the transistor
D:-Reduce the heat losses in the transistor
Correct Answer:- Option-C
Question55:-The main advantage of crystal oscillator is
A:-High output voltage
B:-High frequency stability
C:-High efficiency
D:-High gain
Correct Answer:- Option-B
Question56:-Which of the given characteristics are false in case of ideal OPAMP ?
A:-Infinite output impedance
B:-Infinite input impedance
C:-Infinite CMRR
D:-Infinite bandwidth
Correct Answer:- Option-A
Question57:-Find the signal to noise ratio for diode current ‘|_(D)’ = 1‘mu*A over a 2 MHz bandwidth.

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