Kerala PSC Previous Years Question Paper & Answer
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Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name ' Junior Instructor(Technician Power Electronics System-TPES)' And exam conducted in the year 2023. And Question paper code was '125/2023'. 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.
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Which of the following devices does not have negative Resistance characteristics ?
A) UJT B) Tunnel Diode
C) SCR D) FET
Varactor diode is used for
A) Electronic tuning B) Rectifier
C) Amplifier D) Clipper circuit
In an oscillator, the feedback signal is
A) in phase with input signal
B) in phase with output signal
C) out of phase with input signal
D) out of phase with output signal
The current through the SCR can be turned off by
A) Reducing the current through SCR below holding current
B) Removing the gate current
C) Reverse the gate current
)
D) None of the above
SCR has
A) 2 leads, 3 PN junctions B) 3 leads, 3 layers
©) 3 leads, 4 layers D) 4 leads, 4 layers
The equivalent circuit of TRIAC is
A) One NPN and one PIP transistors interconnected
B) Two SCR connected in inverse parallel with common gate
C) Two diodes connect in reverse parallel
)
D) One diode and two resistors
The TRIAC can be triggered into conduction by
A) Only negative gate signal
B) Only positive gate signal
C) Without gate signal
D) Positive or negative gate signal