Kerala PSC Previous Years Question Paper & Answer
Page:20
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.
Correct Answer:- Option-C
Question94:-In a boost converter, if the output voltage is thrice the input voltage,
what is the duty cycle of the switch ?
A:-50%
B:-33.3%
C:-25%
D:-66.6%
Correct Answer:- Option-D
Question95:-A PWM signal has a frequency of 10 KHz and a duty cycle of 60%.
What is the on-time of the signal ?
A:-6 ms
B:-60 us
C:-6 45
D:-60 ms
Correct Answer:- Option-B
Question96:-What is the difference between a buck converter and a step down
chopper ?
A:-Both buck converter and step down chopper are same
B:-Buck converter cannot be used with R load
C:-Buck converter is a step down chopper with a low pass filter
D:-Chopper cannot be used with RL load
Correct Answer:- Option-C
Question97:-Which of the following is not a type of stepper motor ?
A:-Permanent Magnet Stepper Motor
B:-Hybrid Stepper Motor
C:-Variable Reluctance Stepper Motor
D:-Brushless DC Stepper Motor
Correct Answer:- Option-D
Question98:-What is the frequency of the output voltage of a voltage source
inverter (VSI) if the input voltage is 480 V, the modulation index is 0.8, and the
carrier frequency is 6 KHz ?
A:-2 KHz
B:-4 KHz
C:-6 KHz
D:-18 KHz
Correct Answer:- Option-C
Question99:-A DC separately excited motor is fed from a step down chopper such
that motor runs at rated speed and torque producing a back emf of magnitude