Kerala PSC Previous Years Question Paper & Answer
Page:12
Below are the scanned copy of Kerala Public Service Commission (KPSC) Question Paper with answer keys of Exam Name 'Junior Instructor (Electronic Mechanic)' And exam conducted in the year 2023. And Question paper code was '081/2023/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.
D:-equal to that of incoming signal
Correct Answer:- Option-C
Question60:-In a line of sight system the receiving and transmitting antenna
heights are 10m and 100m respectively above the surface of the earth. The range
of the system will be approximately
A:-32 km
B:-82 km
C:-25 km
D:-52 km
Correct Answer:- Option-D
Question61:-QPSK system uses a phase shift of
A:-1/2
B:-1/4
(शा
7:-3ಗ
Correct Answer:- Option-A
Question62:-FDM uses to prevent modulated signal from overlapping.
A:-Guard band
B:-Physical hardware device
C:-Carrier frequencies
D:-De-Multiplexers
Correct Answer:- Option-A
Question63:-A 500W carrier is amplitude modulated to a depth of 60%. What is the
total power of the transmitted wave.
A:-250W
B:-520W
C:-950W
D:-590W
Correct Answer:- Option-D
Question64:-Which fiber is preferred for long distance communication
A:-Graded index
B:-Step index single mode
C:-Step index multimode
D:-Graded index multimode
Correct Answer:- Option-B
Question65:-Optical Time Domain Reflectometer is used to measure
A:-Wavelength