Kerala PSC Previous Years Question Paper & Answer
Page:19
Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name ' Maintenance Engineer (Electronics)' And exam conducted in the year 2023. And Question paper code was '083/2023/OL'. Medium of question paper was in Malayalam or English . Booklet Alphacode was ''. 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.
C:-1.2 times
D:-1.8 times
Correct Answer:- Option-B
Question89:-A 120 degree voltage source inverter is used for speed control of an
induction motor. Which of the following is more true about this control ?
A:-V/f control is possible with this control
B:-V/f control is possible if a step-down chopper is added at its front end
C:-V/f control is possible if a rectifier is added at its front end
D:-Both 2 and 3
Correct Answer:- Option-B
Question90:-A boost converter is used to convert 50V DC to 150V DC. The PWM
gate signal for this converter is fed from a microcontroller having 3.3V as its DC
supply. What is the DC average value of this gate signal ?
A:-2.5 V
8:-2.2 рек
C:-1.65 V
D:-9.9V
Correct Answer:- Option-B
Question91:-Which of the following is not a common type of stepper motor drive ?
A:-Full-step drive
B:-Half-step drive
C:-Microstepping drive
D:-Dual-phase drive
Correct Answer:- Option-D
Question92:-A 12V Zener diode regulator has a power dissipation in Zener diode
and series resistor as 6W and 16W respectively. If the load current is 1.5 A, what is
the duty cycle of a SMPS based buck regulator which replaces this Zener regulator ?
A:-0.3
B:-0.6
C:-0.4
D:-0.2
Correct Answer:- Option-B
Question93:-What will be the peak value of a PWM controlled voltage source
inverter fed from a dc supply of voltage, V ?
A:-V/2
B:-V/V2
C:-V
D:-2V